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Traefik & Kubernetes with Gateway API

The Kubernetes Gateway API, The Experimental Way.

Gateway API is the evolution of Kubernetes APIs that relate to Services, such as Ingress. The Gateway API project is part of Kubernetes, working under SIG-NETWORK.

The Kubernetes Gateway provider is a Traefik implementation of the Gateway API specifications from the Kubernetes Special Interest Groups (SIGs).

This provider is proposed as an experimental feature and partially supports the Gateway API v0.2.0 specification.

Enabling The Experimental Kubernetes Gateway Provider

Since this provider is still experimental, it needs to be activated in the experimental section of the static configuration.

experimental:
  kubernetesGateway: true

providers:
  kubernetesGateway: {}
  #...
[experimental]
  kubernetesGateway = true

[providers.kubernetesGateway]
#...
--experimental.kubernetesgateway=true --providers.kubernetesgateway=true #...

Configuration Requirements

All Steps for a Successful Deployment

  • Add/update the Kubernetes Gateway API definitions.
  • Add/update the RBAC for the Traefik custom resources.
  • Add all needed Kubernetes Gateway API resources.

Examples

Kubernetes Gateway Provider Basic Example
---
kind: GatewayClass
apiVersion: networking.x-k8s.io/v1alpha1
metadata:
  name: my-gateway-class
spec:
  controller: traefik.io/gateway-controller

---
kind: Gateway
apiVersion: networking.x-k8s.io/v1alpha1
metadata:
  name: my-gateway
spec:
  gatewayClassName: my-gateway-class
  listeners:
    - protocol: HTTPS
      port: 443
      tls:
        certificateRef:
          group: "core"
          kind: "Secret"
          name: "mysecret"
      routes:
        kind: HTTPRoute
        selector:
          matchLabels:
            app: foo
---
kind: HTTPRoute
apiVersion: networking.x-k8s.io/v1alpha1
metadata:
  name: http-app-1
  namespace: default
  labels:
    app: foo
spec:
  hostnames:
    - "whoami"
  rules:
    - matches:
        - path:
            type: Exact
            value: /foo
      forwardTo:
        - serviceName: whoami
          port: 80
          weight: 1
---
kind: Deployment
apiVersion: apps/v1
metadata:
  name: whoami

spec:
  replicas: 2
  selector:
    matchLabels:
      app: whoami
  template:
    metadata:
      labels:
        app: whoami
    spec:
      containers:
        - name: whoami
          image: traefik/whoami

---
apiVersion: v1
kind: Service
metadata:
  name: whoami

spec:
  ports:
    - protocol: TCP
      port: 80
  selector:
    app: whoami
---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: traefik-controller

---
kind: Deployment
apiVersion: apps/v1
metadata:
  name: traefik

spec:
  replicas: 1
  selector:
    matchLabels:
      app: traefik-lb
  template:
    metadata:
      labels:
        app: traefik-lb
    spec:
      serviceAccountName: traefik-controller
      containers:
        - name: traefik
          image: traefik/traefik:latest
          imagePullPolicy: IfNotPresent
          args:
            - --entrypoints.web.address=:80
            - --entrypoints.websecure.address=:443
            - --experimental.kubernetesgateway
            - --providers.kubernetesgateway
          ports:
            - name: web
              containerPort: 80
            - name: websecure
              containerPort: 443

---
apiVersion: v1
kind: Service
metadata:
  name: traefik
spec:
  selector:
    app: traefik-lb
  ports:
    - protocol: TCP
      port: 80
      targetPort: web
      name: web
    - protocol: TCP
      port: 443
      targetPort: websecure
      name: websecure
  type: LoadBalancer
# All resources definition must be declared

---
apiVersion: apiextensions.k8s.io/v1
kind: CustomResourceDefinition
metadata:
  annotations:
    controller-gen.kubebuilder.io/version: v0.4.1
  creationTimestamp: null
  name: gatewayclasses.networking.x-k8s.io
spec:
  group: networking.x-k8s.io
  names:
    kind: GatewayClass
    listKind: GatewayClassList
    plural: gatewayclasses
    shortNames:
    - gc
    singular: gatewayclass
  scope: Cluster
  versions:
  - additionalPrinterColumns:
    - jsonPath: .spec.controller
      name: Controller
      type: string
    name: v1alpha1
    schema:
      openAPIV3Schema:
        description: "GatewayClass describes a class of Gateways available to the user for creating Gateway resources. \n GatewayClass is a Cluster level resource."
        properties:
          apiVersion:
            description: 'APIVersion defines the versioned schema of this representation of an object. Servers should convert recognized schemas to the latest internal value, and may reject unrecognized values. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#resources'
            type: string
          kind:
            description: 'Kind is a string value representing the REST resource this object represents. Servers may infer this from the endpoint the client submits requests to. Cannot be updated. In CamelCase. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#types-kinds'
            type: string
          metadata:
            type: object
          spec:
            description: Spec defines the desired state of GatewayClass.
            properties:
              controller:
                description: "Controller is a domain/path string that indicates the controller that is managing Gateways of this class. \n Example: \"acme.io/gateway-controller\". \n This field is not mutable and cannot be empty. \n The format of this field is DOMAIN \"/\" PATH, where DOMAIN and PATH are valid Kubernetes names (https://kubernetes.io/docs/concepts/overview/working-with-objects/names/#names). \n Support: Core"
                maxLength: 253
                type: string
              parametersRef:
                description: "ParametersRef is a reference to a resource that contains the configuration parameters corresponding to the GatewayClass. This is optional if the controller does not require any additional configuration. \n ParametersRef can reference a standard Kubernetes resource, i.e. ConfigMap, or an implementation-specific custom resource. The resource can be cluster-scoped or namespace-scoped. \n If the referent cannot be found, the GatewayClass's \"InvalidParameters\" status condition will be true. \n Support: Custom"
                properties:
                  group:
                    description: Group is the group of the referent.
                    maxLength: 253
                    minLength: 1
                    type: string
                  kind:
                    description: Kind is kind of the referent.
                    maxLength: 253
                    minLength: 1
                    type: string
                  name:
                    description: Name is the name of the referent.
                    maxLength: 253
                    minLength: 1
                    type: string
                  namespace:
                    description: Namespace is the namespace of the referent. This field is required when scope is set to "Namespace" and ignored when scope is set to "Cluster".
                    maxLength: 253
                    minLength: 1
                    type: string
                  scope:
                    default: Cluster
                    description: Scope represents if the referent is a Cluster or Namespace scoped resource. This may be set to "Cluster" or "Namespace".
                    enum:
                    - Cluster
                    - Namespace
                    type: string
                required:
                - group
                - kind
                - name
                type: object
            required:
            - controller
            type: object
          status:
            default:
              conditions:
              - lastTransitionTime: "1970-01-01T00:00:00Z"
                message: Waiting for controller
                reason: Waiting
                status: "False"
                type: Admitted
            description: Status defines the current state of GatewayClass.
            properties:
              conditions:
                default:
                - lastTransitionTime: "1970-01-01T00:00:00Z"
                  message: Waiting for controller
                  reason: Waiting
                  status: "False"
                  type: Admitted
                description: "Conditions is the current status from the controller for this GatewayClass. \n Controllers should prefer to publish conditions using values of GatewayClassConditionType for the type of each Condition."
                items:
                  description: "Condition contains details for one aspect of the current state of this API Resource. --- This struct is intended for direct use as an array at the field path .status.conditions.  For example, type FooStatus struct{     // Represents the observations of a foo's current state.     // Known .status.conditions.type are: \"Available\", \"Progressing\", and \"Degraded\"     // +patchMergeKey=type     // +patchStrategy=merge     // +listType=map     // +listMapKey=type     Conditions []metav1.Condition `json:\"conditions,omitempty\" patchStrategy:\"merge\" patchMergeKey:\"type\" protobuf:\"bytes,1,rep,name=conditions\"` \n     // other fields }"
                  properties:
                    lastTransitionTime:
                      description: lastTransitionTime is the last time the condition transitioned from one status to another. This should be when the underlying condition changed.  If that is not known, then using the time when the API field changed is acceptable.
                      format: date-time
                      type: string
                    message:
                      description: message is a human readable message indicating details about the transition. This may be an empty string.
                      maxLength: 32768
                      type: string
                    observedGeneration:
                      description: observedGeneration represents the .metadata.generation that the condition was set based upon. For instance, if .metadata.generation is currently 12, but the .status.conditions[x].observedGeneration is 9, the condition is out of date with respect to the current state of the instance.
                      format: int64
                      minimum: 0
                      type: integer
                    reason:
                      description: reason contains a programmatic identifier indicating the reason for the condition's last transition. Producers of specific condition types may define expected values and meanings for this field, and whether the values are considered a guaranteed API. The value should be a CamelCase string. This field may not be empty.
                      maxLength: 1024
                      minLength: 1
                      pattern: ^[A-Za-z]([A-Za-z0-9_,:]*[A-Za-z0-9_])?$
                      type: string
                    status:
                      description: status of the condition, one of True, False, Unknown.
                      enum:
                      - "True"
                      - "False"
                      - Unknown
                      type: string
                    type:
                      description: type of condition in CamelCase or in foo.example.com/CamelCase. --- Many .condition.type values are consistent across resources like Available, but because arbitrary conditions can be useful (see .node.status.conditions), the ability to deconflict is important. The regex it matches is (dns1123SubdomainFmt/)?(qualifiedNameFmt)
                      maxLength: 316
                      pattern: ^([a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*/)?(([A-Za-z0-9][-A-Za-z0-9_.]*)?[A-Za-z0-9])$
                      type: string
                  required:
                  - lastTransitionTime
                  - message
                  - reason
                  - status
                  - type
                  type: object
                maxItems: 8
                type: array
                x-kubernetes-list-map-keys:
                - type
                x-kubernetes-list-type: map
            type: object
        type: object
    served: true
    storage: true
    subresources:
      status: {}
status:
  acceptedNames:
    kind: ""
    plural: ""
  conditions: []
  storedVersions: []

---
apiVersion: apiextensions.k8s.io/v1
kind: CustomResourceDefinition
metadata:
  annotations:
    controller-gen.kubebuilder.io/version: v0.4.1
  creationTimestamp: null
  name: gateways.networking.x-k8s.io
spec:
  group: networking.x-k8s.io
  names:
    kind: Gateway
    listKind: GatewayList
    plural: gateways
    shortNames:
    - gtw
    singular: gateway
  scope: Namespaced
  versions:
  - additionalPrinterColumns:
    - jsonPath: .spec.gatewayClassName
      name: Class
      type: string
    name: v1alpha1
    schema:
      openAPIV3Schema:
        description: "Gateway represents an instantiation of a service-traffic handling infrastructure by binding Listeners to a set of IP addresses. \n Implementations should add the `gateway-exists-finalizer.networking.x-k8s.io` finalizer on the associated GatewayClass whenever Gateway(s) is running. This ensures that a GatewayClass associated with a Gateway(s) is not deleted while in use."
        properties:
          apiVersion:
            description: 'APIVersion defines the versioned schema of this representation of an object. Servers should convert recognized schemas to the latest internal value, and may reject unrecognized values. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#resources'
            type: string
          kind:
            description: 'Kind is a string value representing the REST resource this object represents. Servers may infer this from the endpoint the client submits requests to. Cannot be updated. In CamelCase. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#types-kinds'
            type: string
          metadata:
            type: object
          spec:
            description: Spec defines the desired state of Gateway.
            properties:
              addresses:
                description: "Addresses requested for this gateway. This is optional and behavior can depend on the GatewayClass. If a value is set in the spec and the requested address is invalid, the GatewayClass MUST indicate this in the associated entry in GatewayStatus.Addresses. \n If no Addresses are specified, the GatewayClass may schedule the Gateway in an implementation-defined manner, assigning an appropriate set of Addresses. \n The GatewayClass MUST bind all Listeners to every GatewayAddress that it assigns to the Gateway. \n Support: Core"
                items:
                  description: GatewayAddress describes an address that can be bound to a Gateway.
                  properties:
                    type:
                      default: IPAddress
                      description: "Type of the address. \n Support: Extended"
                      enum:
                      - IPAddress
                      - NamedAddress
                      type: string
                    value:
                      description: "Value of the address. The validity of the values will depend on the type and support by the controller. \n Examples: `1.2.3.4`, `128::1`, `my-ip-address`."
                      maxLength: 253
                      minLength: 1
                      type: string
                  required:
                  - value
                  type: object
                maxItems: 16
                type: array
              gatewayClassName:
                description: GatewayClassName used for this Gateway. This is the name of a GatewayClass resource.
                maxLength: 253
                minLength: 1
                type: string
              listeners:
                description: "Listeners associated with this Gateway. Listeners define logical endpoints that are bound on this Gateway's addresses. At least one Listener MUST be specified. \n An implementation MAY group Listeners by Port and then collapse each group of Listeners into a single Listener if the implementation determines that the Listeners in the group are \"compatible\". An implementation MAY also group together and collapse compatible Listeners belonging to different Gateways. \n For example, an implementation might consider Listeners to be compatible with each other if all of the following conditions are met: \n 1. Either each Listener within the group specifies the \"HTTP\"    Protocol or each Listener within the group specifies either    the \"HTTPS\" or \"TLS\" Protocol. \n 2. Each Listener within the group specifies a Hostname that is unique    within the group. \n 3. As a special case, one Listener within a group may omit Hostname,    in which case this Listener matches when no other Listener    matches. \n If the implementation does collapse compatible Listeners, the hostname provided in the incoming client request MUST be matched to a Listener to find the correct set of Routes. The incoming hostname MUST be matched using the Hostname field for each Listener in order of most to least specific. That is, exact matches must be processed before wildcard matches. \n If this field specifies multiple Listeners that have the same Port value but are not compatible, the implementation must raise a \"Conflicted\" condition in the Listener status. \n Support: Core"
                items:
                  description: Listener embodies the concept of a logical endpoint where a Gateway can accept network connections. Each listener in a Gateway must have a unique combination of Hostname, Port, and Protocol. This will be enforced by a validating webhook.
                  properties:
                    hostname:
                      description: "Hostname specifies the virtual hostname to match for protocol types that define this concept. When unspecified, \"\", or `*`, all hostnames are matched. This field can be omitted for protocols that don't require hostname based matching. \n Hostname is the fully qualified domain name of a network host, as defined by RFC 3986. Note the following deviations from the \"host\" part of the URI as defined in the RFC: \n 1. IP literals are not allowed. 2. The `:` delimiter is not respected because ports are not allowed. \n Hostname can be \"precise\" which is a domain name without the terminating dot of a network host (e.g. \"foo.example.com\") or \"wildcard\", which is a domain name prefixed with a single wildcard label (e.g. `*.example.com`). The wildcard character `*` must appear by itself as the first DNS label and matches only a single label. \n Support: Core"
                      maxLength: 253
                      minLength: 1
                      type: string
                    port:
                      description: "Port is the network port. Multiple listeners may use the same port, subject to the Listener compatibility rules. \n Support: Core"
                      format: int32
                      maximum: 65535
                      minimum: 1
                      type: integer
                    protocol:
                      description: "Protocol specifies the network protocol this listener expects to receive. The GatewayClass MUST apply the Hostname match appropriately for each protocol: \n * For the \"TLS\" protocol, the Hostname match MUST be   applied to the [SNI](https://tools.ietf.org/html/rfc6066#section-3)   server name offered by the client. * For the \"HTTP\" protocol, the Hostname match MUST be   applied to the host portion of the   [effective request URI](https://tools.ietf.org/html/rfc7230#section-5.5)   or the [:authority pseudo-header](https://tools.ietf.org/html/rfc7540#section-8.1.2.3) * For the \"HTTPS\" protocol, the Hostname match MUST be   applied at both the TLS and HTTP protocol layers. \n Support: Core"
                      type: string
                    routes:
                      description: "Routes specifies a schema for associating routes with the Listener using selectors. A Route is a resource capable of servicing a request and allows a cluster operator to expose a cluster resource (i.e. Service) by externally-reachable URL, load-balance traffic and terminate SSL/TLS.  Typically, a route is a \"HTTPRoute\" or \"TCPRoute\" in group \"networking.x-k8s.io\", however, an implementation may support other types of resources. \n The Routes selector MUST select a set of objects that are compatible with the application protocol specified in the Protocol field. \n Although a client request may technically match multiple route rules, only one rule may ultimately receive the request. Matching precedence MUST be determined in order of the following criteria: \n * The most specific match. For example, the most specific HTTPRoute match   is determined by the longest matching combination of hostname and path. * The oldest Route based on creation timestamp. For example, a Route with   a creation timestamp of \"2020-09-08 01:02:03\" is given precedence over   a Route with a creation timestamp of \"2020-09-08 01:02:04\". * If everything else is equivalent, the Route appearing first in   alphabetical order (namespace/name) should be given precedence. For   example, foo/bar is given precedence over foo/baz. \n All valid portions of a Route selected by this field should be supported. Invalid portions of a Route can be ignored (sometimes that will mean the full Route). If a portion of a Route transitions from valid to invalid, support for that portion of the Route should be dropped to ensure consistency. For example, even if a filter specified by a Route is invalid, the rest of the Route should still be supported. \n Support: Core"
                      properties:
                        group:
                          default: networking.x-k8s.io
                          description: "Group is the group of the route resource to select. Omitting the value or specifying the empty string indicates the networking.x-k8s.io API group. For example, use the following to select an HTTPRoute: \n routes:   kind: HTTPRoute \n Otherwise, if an alternative API group is desired, specify the desired group: \n routes:   group: acme.io   kind: FooRoute \n Support: Core"
                          maxLength: 253
                          minLength: 1
                          type: string
                        kind:
                          description: "Kind is the kind of the route resource to select. \n Kind MUST correspond to kinds of routes that are compatible with the application protocol specified in the Listener's Protocol field. \n If an implementation does not support or recognize this resource type, it SHOULD set the \"ResolvedRefs\" condition to false for this listener with the \"InvalidRoutesRef\" reason. \n Support: Core"
                          type: string
                        namespaces:
                          default:
                            from: Same
                          description: "Namespaces indicates in which namespaces Routes should be selected for this Gateway. This is restricted to the namespace of this Gateway by default. \n Support: Core"
                          properties:
                            from:
                              default: Same
                              description: "From indicates where Routes will be selected for this Gateway. Possible values are: * All: Routes in all namespaces may be used by this Gateway. * Selector: Routes in namespaces selected by the selector may be used by   this Gateway. * Same: Only Routes in the same namespace may be used by this Gateway. \n Support: Core"
                              enum:
                              - All
                              - Selector
                              - Same
                              type: string
                            selector:
                              description: "Selector must be specified when From is set to \"Selector\". In that case, only Routes in Namespaces matching this Selector will be selected by this Gateway. This field is ignored for other values of \"From\". \n Support: Core"
                              properties:
                                matchExpressions:
                                  description: matchExpressions is a list of label selector requirements. The requirements are ANDed.
                                  items:
                                    description: A label selector requirement is a selector that contains values, a key, and an operator that relates the key and values.
                                    properties:
                                      key:
                                        description: key is the label key that the selector applies to.
                                        type: string
                                      operator:
                                        description: operator represents a key's relationship to a set of values. Valid operators are In, NotIn, Exists and DoesNotExist.
                                        type: string
                                      values:
                                        description: values is an array of string values. If the operator is In or NotIn, the values array must be non-empty. If the operator is Exists or DoesNotExist, the values array must be empty. This array is replaced during a strategic merge patch.
                                        items:
                                          type: string
                                        type: array
                                    required:
                                    - key
                                    - operator
                                    type: object
                                  type: array
                                matchLabels:
                                  additionalProperties:
                                    type: string
                                  description: matchLabels is a map of {key,value} pairs. A single {key,value} in the matchLabels map is equivalent to an element of matchExpressions, whose key field is "key", the operator is "In", and the values array contains only "value". The requirements are ANDed.
                                  type: object
                              type: object
                          type: object
                        selector:
                          description: "Selector specifies a set of route labels used for selecting routes to associate with the Gateway. If this Selector is defined, only routes matching the Selector are associated with the Gateway. An empty Selector matches all routes. \n Support: Core"
                          properties:
                            matchExpressions:
                              description: matchExpressions is a list of label selector requirements. The requirements are ANDed.
                              items:
                                description: A label selector requirement is a selector that contains values, a key, and an operator that relates the key and values.
                                properties:
                                  key:
                                    description: key is the label key that the selector applies to.
                                    type: string
                                  operator:
                                    description: operator represents a key's relationship to a set of values. Valid operators are In, NotIn, Exists and DoesNotExist.
                                    type: string
                                  values:
                                    description: values is an array of string values. If the operator is In or NotIn, the values array must be non-empty. If the operator is Exists or DoesNotExist, the values array must be empty. This array is replaced during a strategic merge patch.
                                    items:
                                      type: string
                                    type: array
                                required:
                                - key
                                - operator
                                type: object
                              type: array
                            matchLabels:
                              additionalProperties:
                                type: string
                              description: matchLabels is a map of {key,value} pairs. A single {key,value} in the matchLabels map is equivalent to an element of matchExpressions, whose key field is "key", the operator is "In", and the values array contains only "value". The requirements are ANDed.
                              type: object
                          type: object
                      required:
                      - kind
                      type: object
                    tls:
                      description: "TLS is the TLS configuration for the Listener. This field is required if the Protocol field is \"HTTPS\" or \"TLS\" and ignored otherwise. \n The association of SNIs to Certificate defined in GatewayTLSConfig is defined based on the Hostname field for this listener. \n The GatewayClass MUST use the longest matching SNI out of all available certificates for any TLS handshake. \n Support: Core"
                      properties:
                        certificateRef:
                          description: "CertificateRef is the reference to Kubernetes object that contain a TLS certificate and private key. This certificate MUST be used for TLS handshakes for the domain this GatewayTLSConfig is associated with. \n This field is required when mode is set to \"Terminate\" (default) and optional otherwise. \n If an entry in this list omits or specifies the empty string for both the group and the resource, the resource defaults to \"secrets\". An implementation may support other resources (for example, resource \"mycertificates\" in group \"networking.acme.io\"). \n Support: Core (Kubernetes Secrets) \n Support: Implementation-specific (Other resource types)"
                          properties:
                            group:
                              description: Group is the group of the referent.
                              maxLength: 253
                              minLength: 1
                              type: string
                            kind:
                              description: Kind is kind of the referent.
                              maxLength: 253
                              minLength: 1
                              type: string
                            name:
                              description: Name is the name of the referent.
                              maxLength: 253
                              minLength: 1
                              type: string
                          required:
                          - group
                          - kind
                          - name
                          type: object
                        mode:
                          default: Terminate
                          description: "Mode defines the TLS behavior for the TLS session initiated by the client. There are two possible modes: - Terminate: The TLS session between the downstream client   and the Gateway is terminated at the Gateway. This mode requires   certificateRef to be set. - Passthrough: The TLS session is NOT terminated by the Gateway. This   implies that the Gateway can't decipher the TLS stream except for   the ClientHello message of the TLS protocol.   CertificateRef field is ignored in this mode. \n Support: Core"
                          enum:
                          - Terminate
                          - Passthrough
                          type: string
                        options:
                          additionalProperties:
                            type: string
                          description: "Options are a list of key/value pairs to give extended options to the provider. \n There variation among providers as to how ciphersuites are expressed. If there is a common subset for expressing ciphers then it will make sense to loft that as a core API construct. \n Support: Implementation-specific"
                          type: object
                        routeOverride:
                          default:
                            certificate: Deny
                          description: "RouteOverride dictates if TLS settings can be configured via Routes or not. \n CertificateRef must be defined even if `routeOverride.certificate` is set to 'Allow' as it will be used as the default certificate for the listener. \n Support: Core"
                          properties:
                            certificate:
                              default: Deny
                              description: "Certificate dictates if TLS certificates can be configured via Routes. If set to 'Allow', a TLS certificate for a hostname defined in a Route takes precedence over the certificate defined in Gateway. \n Support: Core"
                              enum:
                              - Allow
                              - Deny
                              type: string
                          type: object
                      type: object
                  required:
                  - port
                  - protocol
                  - routes
                  type: object
                maxItems: 64
                minItems: 1
                type: array
            required:
            - gatewayClassName
            - listeners
            type: object
          status:
            default:
              conditions:
              - lastTransitionTime: "1970-01-01T00:00:00Z"
                message: Waiting for controller
                reason: NotReconciled
                status: "False"
                type: Scheduled
            description: Status defines the current state of Gateway.
            properties:
              addresses:
                description: "Addresses lists the IP addresses that have actually been bound to the Gateway. These addresses may differ from the addresses in the Spec, e.g. if the Gateway automatically assigns an address from a reserved pool. \n These addresses should all be of type \"IPAddress\"."
                items:
                  description: GatewayAddress describes an address that can be bound to a Gateway.
                  properties:
                    type:
                      default: IPAddress
                      description: "Type of the address. \n Support: Extended"
                      enum:
                      - IPAddress
                      - NamedAddress
                      type: string
                    value:
                      description: "Value of the address. The validity of the values will depend on the type and support by the controller. \n Examples: `1.2.3.4`, `128::1`, `my-ip-address`."
                      maxLength: 253
                      minLength: 1
                      type: string
                  required:
                  - value
                  type: object
                maxItems: 16
                type: array
              conditions:
                default:
                - lastTransitionTime: "1970-01-01T00:00:00Z"
                  message: Waiting for controller
                  reason: NotReconciled
                  status: "False"
                  type: Scheduled
                description: "Conditions describe the current conditions of the Gateway. \n Implementations should prefer to express Gateway conditions using the `GatewayConditionType` and `GatewayConditionReason` constants so that operators and tools can converge on a common vocabulary to describe Gateway state. \n Known condition types are: \n * \"Scheduled\" * \"Ready\""
                items:
                  description: "Condition contains details for one aspect of the current state of this API Resource. --- This struct is intended for direct use as an array at the field path .status.conditions.  For example, type FooStatus struct{     // Represents the observations of a foo's current state.     // Known .status.conditions.type are: \"Available\", \"Progressing\", and \"Degraded\"     // +patchMergeKey=type     // +patchStrategy=merge     // +listType=map     // +listMapKey=type     Conditions []metav1.Condition `json:\"conditions,omitempty\" patchStrategy:\"merge\" patchMergeKey:\"type\" protobuf:\"bytes,1,rep,name=conditions\"` \n     // other fields }"
                  properties:
                    lastTransitionTime:
                      description: lastTransitionTime is the last time the condition transitioned from one status to another. This should be when the underlying condition changed.  If that is not known, then using the time when the API field changed is acceptable.
                      format: date-time
                      type: string
                    message:
                      description: message is a human readable message indicating details about the transition. This may be an empty string.
                      maxLength: 32768
                      type: string
                    observedGeneration:
                      description: observedGeneration represents the .metadata.generation that the condition was set based upon. For instance, if .metadata.generation is currently 12, but the .status.conditions[x].observedGeneration is 9, the condition is out of date with respect to the current state of the instance.
                      format: int64
                      minimum: 0
                      type: integer
                    reason:
                      description: reason contains a programmatic identifier indicating the reason for the condition's last transition. Producers of specific condition types may define expected values and meanings for this field, and whether the values are considered a guaranteed API. The value should be a CamelCase string. This field may not be empty.
                      maxLength: 1024
                      minLength: 1
                      pattern: ^[A-Za-z]([A-Za-z0-9_,:]*[A-Za-z0-9_])?$
                      type: string
                    status:
                      description: status of the condition, one of True, False, Unknown.
                      enum:
                      - "True"
                      - "False"
                      - Unknown
                      type: string
                    type:
                      description: type of condition in CamelCase or in foo.example.com/CamelCase. --- Many .condition.type values are consistent across resources like Available, but because arbitrary conditions can be useful (see .node.status.conditions), the ability to deconflict is important. The regex it matches is (dns1123SubdomainFmt/)?(qualifiedNameFmt)
                      maxLength: 316
                      pattern: ^([a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*/)?(([A-Za-z0-9][-A-Za-z0-9_.]*)?[A-Za-z0-9])$
                      type: string
                  required:
                  - lastTransitionTime
                  - message
                  - reason
                  - status
                  - type
                  type: object
                maxItems: 8
                type: array
                x-kubernetes-list-map-keys:
                - type
                x-kubernetes-list-type: map
              listeners:
                description: Listeners provide status for each unique listener port defined in the Spec.
                items:
                  description: ListenerStatus is the status associated with a Listener.
                  properties:
                    conditions:
                      description: Conditions describe the current condition of this listener.
                      items:
                        description: "Condition contains details for one aspect of the current state of this API Resource. --- This struct is intended for direct use as an array at the field path .status.conditions.  For example, type FooStatus struct{     // Represents the observations of a foo's current state.     // Known .status.conditions.type are: \"Available\", \"Progressing\", and \"Degraded\"     // +patchMergeKey=type     // +patchStrategy=merge     // +listType=map     // +listMapKey=type     Conditions []metav1.Condition `json:\"conditions,omitempty\" patchStrategy:\"merge\" patchMergeKey:\"type\" protobuf:\"bytes,1,rep,name=conditions\"` \n     // other fields }"
                        properties:
                          lastTransitionTime:
                            description: lastTransitionTime is the last time the condition transitioned from one status to another. This should be when the underlying condition changed.  If that is not known, then using the time when the API field changed is acceptable.
                            format: date-time
                            type: string
                          message:
                            description: message is a human readable message indicating details about the transition. This may be an empty string.
                            maxLength: 32768
                            type: string
                          observedGeneration:
                            description: observedGeneration represents the .metadata.generation that the condition was set based upon. For instance, if .metadata.generation is currently 12, but the .status.conditions[x].observedGeneration is 9, the condition is out of date with respect to the current state of the instance.
                            format: int64
                            minimum: 0
                            type: integer
                          reason:
                            description: reason contains a programmatic identifier indicating the reason for the condition's last transition. Producers of specific condition types may define expected values and meanings for this field, and whether the values are considered a guaranteed API. The value should be a CamelCase string. This field may not be empty.
                            maxLength: 1024
                            minLength: 1
                            pattern: ^[A-Za-z]([A-Za-z0-9_,:]*[A-Za-z0-9_])?$
                            type: string
                          status:
                            description: status of the condition, one of True, False, Unknown.
                            enum:
                            - "True"
                            - "False"
                            - Unknown
                            type: string
                          type:
                            description: type of condition in CamelCase or in foo.example.com/CamelCase. --- Many .condition.type values are consistent across resources like Available, but because arbitrary conditions can be useful (see .node.status.conditions), the ability to deconflict is important. The regex it matches is (dns1123SubdomainFmt/)?(qualifiedNameFmt)
                            maxLength: 316
                            pattern: ^([a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*/)?(([A-Za-z0-9][-A-Za-z0-9_.]*)?[A-Za-z0-9])$
                            type: string
                        required:
                        - lastTransitionTime
                        - message
                        - reason
                        - status
                        - type
                        type: object
                      maxItems: 8
                      type: array
                      x-kubernetes-list-map-keys:
                      - type
                      x-kubernetes-list-type: map
                    hostname:
                      description: Hostname is the Listener hostname value for which this message is reporting the status.
                      maxLength: 253
                      minLength: 1
                      type: string
                    port:
                      description: Port is the unique Listener port value for which this message is reporting the status.
                      format: int32
                      maximum: 65535
                      minimum: 1
                      type: integer
                    protocol:
                      description: Protocol is the Listener protocol value for which this message is reporting the status.
                      type: string
                  required:
                  - conditions
                  - port
                  - protocol
                  type: object
                maxItems: 64
                type: array
                x-kubernetes-list-map-keys:
                - port
                x-kubernetes-list-type: map
            type: object
        type: object
    served: true
    storage: true
    subresources:
      status: {}
status:
  acceptedNames:
    kind: ""
    plural: ""
  conditions: []
  storedVersions: []

---
apiVersion: apiextensions.k8s.io/v1
kind: CustomResourceDefinition
metadata:
  annotations:
    controller-gen.kubebuilder.io/version: v0.4.1
  creationTimestamp: null
  name: httproutes.networking.x-k8s.io
spec:
  group: networking.x-k8s.io
  names:
    kind: HTTPRoute
    listKind: HTTPRouteList
    plural: httproutes
    singular: httproute
  scope: Namespaced
  versions:
  - additionalPrinterColumns:
    - jsonPath: .spec.hostnames
      name: Hostnames
      type: string
    name: v1alpha1
    schema:
      openAPIV3Schema:
        description: HTTPRoute is the Schema for the HTTPRoute resource.
        properties:
          apiVersion:
            description: 'APIVersion defines the versioned schema of this representation of an object. Servers should convert recognized schemas to the latest internal value, and may reject unrecognized values. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#resources'
            type: string
          kind:
            description: 'Kind is a string value representing the REST resource this object represents. Servers may infer this from the endpoint the client submits requests to. Cannot be updated. In CamelCase. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#types-kinds'
            type: string
          metadata:
            type: object
          spec:
            description: Spec defines the desired state of HTTPRoute.
            properties:
              gateways:
                default:
                  allow: SameNamespace
                description: Gateways defines which Gateways can use this Route.
                properties:
                  allow:
                    default: SameNamespace
                    description: 'Allow indicates which Gateways will be allowed to use this route. Possible values are: * All: Gateways in any namespace can use this route. * FromList: Only Gateways specified in GatewayRefs may use this route. * SameNamespace: Only Gateways in the same namespace may use this route.'
                    enum:
                    - All
                    - FromList
                    - SameNamespace
                    type: string
                  gatewayRefs:
                    description: GatewayRefs must be specified when Allow is set to "FromList". In that case, only Gateways referenced in this list will be allowed to use this route. This field is ignored for other values of "Allow".
                    items:
                      description: GatewayReference identifies a Gateway in a specified namespace.
                      properties:
                        name:
                          description: Name is the name of the referent.
                          maxLength: 253
                          minLength: 1
                          type: string
                        namespace:
                          description: Namespace is the namespace of the referent.
                          maxLength: 253
                          minLength: 1
                          type: string
                      required:
                      - name
                      - namespace
                      type: object
                    type: array
                type: object
              hostnames:
                description: "Hostnames defines a set of hostname that should match against the HTTP Host header to select a HTTPRoute to process the request. Hostname is the fully qualified domain name of a network host, as defined by RFC 3986. Note the following deviations from the \"host\" part of the URI as defined in the RFC: \n 1. IPs are not allowed. 2. The `:` delimiter is not respected because ports are not allowed. \n Incoming requests are matched against the hostnames before the HTTPRoute rules. If no hostname is specified, traffic is routed based on the HTTPRouteRules. \n Hostname can be \"precise\" which is a domain name without the terminating dot of a network host (e.g. \"foo.example.com\") or \"wildcard\", which is a domain name prefixed with a single wildcard label (e.g. `*.example.com`). The wildcard character `*` must appear by itself as the first DNS label and matches only a single label. You cannot have a wildcard label by itself (e.g. Host == `*`). Requests will be matched against the Host field in the following order: \n 1. If Host is precise, the request matches this rule if    the HTTP Host header is equal to Host. 2. If Host is a wildcard, then the request matches this rule if    the HTTP Host header is to equal to the suffix    (removing the first label) of the wildcard rule. \n Support: Core"
                items:
                  description: Hostname is used to specify a hostname that should be matched.
                  maxLength: 253
                  minLength: 1
                  type: string
                maxItems: 16
                type: array
              rules:
                default:
                - matches:
                  - path:
                      type: Prefix
                      value: /
                description: Rules are a list of HTTP matchers, filters and actions.
                items:
                  description: HTTPRouteRule defines semantics for matching an HTTP request based on conditions, optionally executing additional processing steps, and forwarding the request to an API object.
                  properties:
                    filters:
                      description: "Filters define the filters that are applied to requests that match this rule. \n The effects of ordering of multiple behaviors are currently unspecified. This can change in the future based on feedback during the alpha stage. \n Conformance-levels at this level are defined based on the type of filter: \n - ALL core filters MUST be supported by all implementations. - Implementers are encouraged to support extended filters. - Implementation-specific custom filters have no API guarantees across   implementations. \n Specifying a core filter multiple times has unspecified or custom conformance. \n Support: Core"
                      items:
                        description: 'HTTPRouteFilter defines additional processing steps that must be completed during the request or response lifecycle. HTTPRouteFilters are meant as an extension point to express additional processing that may be done in Gateway implementations. Some examples include request or response modification, implementing authentication strategies, rate-limiting, and traffic shaping. API guarantee/conformance is defined based on the type of the filter. TODO(hbagdi): re-render CRDs once controller-tools supports union tags: - https://github.com/kubernetes-sigs/controller-tools/pull/298 - https://github.com/kubernetes-sigs/controller-tools/issues/461'
                        properties:
                          extensionRef:
                            description: "ExtensionRef is an optional, implementation-specific extension to the \"filter\" behavior.  For example, resource \"myroutefilter\" in group \"networking.acme.io\"). ExtensionRef MUST NOT be used for core and extended filters. \n Support: Implementation-specific"
                            properties:
                              group:
                                description: Group is the group of the referent.
                                maxLength: 253
                                minLength: 1
                                type: string
                              kind:
                                description: Kind is kind of the referent.
                                maxLength: 253
                                minLength: 1
                                type: string
                              name:
                                description: Name is the name of the referent.
                                maxLength: 253
                                minLength: 1
                                type: string
                            required:
                            - group
                            - kind
                            - name
                            type: object
                          requestHeaderModifier:
                            description: "RequestHeaderModifier defines a schema for a filter that modifies request headers. \n Support: Core"
                            properties:
                              add:
                                additionalProperties:
                                  type: string
                                description: "Add adds the given header (name, value) to the request before the action. It appends to any existing values associated with the header name. \n Input:   GET /foo HTTP/1.1   my-header: foo \n Config:   add: {\"my-header\": \"bar\"} \n Output:   GET /foo HTTP/1.1   my-header: foo   my-header: bar \n Support: Extended"
                                type: object
                              remove:
                                description: "Remove the given header(s) from the HTTP request before the action. The value of RemoveHeader is a list of HTTP header names. Note that the header names are case-insensitive [RFC-2616 4.2]. \n Input:   GET /foo HTTP/1.1   my-header1: foo   my-header2: bar   my-header3: baz \n Config:   remove: [\"my-header1\", \"my-header3\"] \n Output:   GET /foo HTTP/1.1   my-header2: bar \n Support: Extended"
                                items:
                                  type: string
                                maxItems: 16
                                type: array
                              set:
                                additionalProperties:
                                  type: string
                                description: "Set overwrites the request with the given header (name, value) before the action. \n Input:   GET /foo HTTP/1.1   my-header: foo \n Config:   set: {\"my-header\": \"bar\"} \n Output:   GET /foo HTTP/1.1   my-header: bar \n Support: Extended"
                                type: object
                            type: object
                          requestMirror:
                            description: "RequestMirror defines a schema for a filter that mirrors requests. \n Support: Extended"
                            properties:
                              backendRef:
                                description: "BackendRef is a local object reference to mirror matched requests to. If both BackendRef and ServiceName are specified, ServiceName will be given precedence. \n If the referent cannot be found, the rule is not included in the route. The controller should raise the \"ResolvedRefs\" condition on the Gateway with the \"DegradedRoutes\" reason. The gateway status for this route should be updated with a condition that describes the error more specifically. \n Support: Custom"
                                properties:
                                  group:
                                    description: Group is the group of the referent.
                                    maxLength: 253
                                    minLength: 1
                                    type: string
                                  kind:
                                    description: Kind is kind of the referent.
                                    maxLength: 253
                                    minLength: 1
                                    type: string
                                  name:
                                    description: Name is the name of the referent.
                                    maxLength: 253
                                    minLength: 1
                                    type: string
                                required:
                                - group
                                - kind
                                - name
                                type: object
                              port:
                                description: "Port specifies the destination port number to use for the backend referenced by the ServiceName or BackendRef field. \n If unspecified, the destination port in the request is used when forwarding to a backendRef or serviceName."
                                format: int32
                                maximum: 65535
                                minimum: 1
                                type: integer
                              serviceName:
                                description: "ServiceName refers to the name of the Service to mirror matched requests to. When specified, this takes the place of BackendRef. If both BackendRef and ServiceName are specified, ServiceName will be given precedence. \n If the referent cannot be found, the rule is not included in the route. The controller should raise the \"ResolvedRefs\" condition on the Gateway with the \"DegradedRoutes\" reason. The gateway status for this route should be updated with a condition that describes the error more specifically. \n Support: Core"
                                maxLength: 253
                                type: string
                            type: object
                          type:
                            description: "Type identifies the type of filter to apply. As with other API fields, types are classified into three conformance levels: \n - Core: Filter types and their corresponding configuration defined by   \"Support: Core\" in this package, e.g. \"RequestHeaderModifier\". All   implementations must support core filters. \n - Extended: Filter types and their corresponding configuration defined by   \"Support: Extended\" in this package, e.g. \"RequestMirror\". Implementers   are encouraged to support extended filters. \n - Custom: Filters that are defined and supported by specific vendors.   In the future, filters showing convergence in behavior across multiple   implementations will be considered for inclusion in extended or core   conformance levels. Filter-specific configuration for such filters   is specified using the ExtensionRef field. `Type` should be set to   \"ExtensionRef\" for custom filters. \n Implementers are encouraged to define custom implementation types to extend the core API with implementation-specific behavior."
                            enum:
                            - RequestHeaderModifier
                            - RequestMirror
                            - ExtensionRef
                            type: string
                        required:
                        - type
                        type: object
                      maxItems: 16
                      type: array
                    forwardTo:
                      description: ForwardTo defines the backend(s) where matching requests should be sent. If unspecified, the rule performs no forwarding. If unspecified and no filters are specified that would result in a response being sent, a 503 error code is returned.
                      items:
                        description: HTTPRouteForwardTo defines how a HTTPRoute should forward a request.
                        properties:
                          backendRef:
                            description: "BackendRef is a reference to a backend to forward matched requests to. If both BackendRef and ServiceName are specified, ServiceName will be given precedence. \n If the referent cannot be found, the route must be dropped from the Gateway. The controller should raise the \"ResolvedRefs\" condition on the Gateway with the \"DegradedRoutes\" reason. The gateway status for this route should be updated with a condition that describes the error more specifically. \n Support: Custom"
                            properties:
                              group:
                                description: Group is the group of the referent.
                                maxLength: 253
                                minLength: 1
                                type: string
                              kind:
                                description: Kind is kind of the referent.
                                maxLength: 253
                                minLength: 1
                                type: string
                              name:
                                description: Name is the name of the referent.
                                maxLength: 253
                                minLength: 1
                                type: string
                            required:
                            - group
                            - kind
                            - name
                            type: object
                          filters:
                            description: "Filters defined at this-level should be executed if and only if the request is being forwarded to the backend defined here. \n Support: Custom (For broader support of filters, use the Filters field in HTTPRouteRule.)"
                            items:
                              description: 'HTTPRouteFilter defines additional processing steps that must be completed during the request or response lifecycle. HTTPRouteFilters are meant as an extension point to express additional processing that may be done in Gateway implementations. Some examples include request or response modification, implementing authentication strategies, rate-limiting, and traffic shaping. API guarantee/conformance is defined based on the type of the filter. TODO(hbagdi): re-render CRDs once controller-tools supports union tags: - https://github.com/kubernetes-sigs/controller-tools/pull/298 - https://github.com/kubernetes-sigs/controller-tools/issues/461'
                              properties:
                                extensionRef:
                                  description: "ExtensionRef is an optional, implementation-specific extension to the \"filter\" behavior.  For example, resource \"myroutefilter\" in group \"networking.acme.io\"). ExtensionRef MUST NOT be used for core and extended filters. \n Support: Implementation-specific"
                                  properties:
                                    group:
                                      description: Group is the group of the referent.
                                      maxLength: 253
                                      minLength: 1
                                      type: string
                                    kind:
                                      description: Kind is kind of the referent.
                                      maxLength: 253
                                      minLength: 1
                                      type: string
                                    name:
                                      description: Name is the name of the referent.
                                      maxLength: 253
                                      minLength: 1
                                      type: string
                                  required:
                                  - group
                                  - kind
                                  - name
                                  type: object
                                requestHeaderModifier:
                                  description: "RequestHeaderModifier defines a schema for a filter that modifies request headers. \n Support: Core"
                                  properties:
                                    add:
                                      additionalProperties:
                                        type: string
                                      description: "Add adds the given header (name, value) to the request before the action. It appends to any existing values associated with the header name. \n Input:   GET /foo HTTP/1.1   my-header: foo \n Config:   add: {\"my-header\": \"bar\"} \n Output:   GET /foo HTTP/1.1   my-header: foo   my-header: bar \n Support: Extended"
                                      type: object
                                    remove:
                                      description: "Remove the given header(s) from the HTTP request before the action. The value of RemoveHeader is a list of HTTP header names. Note that the header names are case-insensitive [RFC-2616 4.2]. \n Input:   GET /foo HTTP/1.1   my-header1: foo   my-header2: bar   my-header3: baz \n Config:   remove: [\"my-header1\", \"my-header3\"] \n Output:   GET /foo HTTP/1.1   my-header2: bar \n Support: Extended"
                                      items:
                                        type: string
                                      maxItems: 16
                                      type: array
                                    set:
                                      additionalProperties:
                                        type: string
                                      description: "Set overwrites the request with the given header (name, value) before the action. \n Input:   GET /foo HTTP/1.1   my-header: foo \n Config:   set: {\"my-header\": \"bar\"} \n Output:   GET /foo HTTP/1.1   my-header: bar \n Support: Extended"
                                      type: object
                                  type: object
                                requestMirror:
                                  description: "RequestMirror defines a schema for a filter that mirrors requests. \n Support: Extended"
                                  properties:
                                    backendRef:
                                      description: "BackendRef is a local object reference to mirror matched requests to. If both BackendRef and ServiceName are specified, ServiceName will be given precedence. \n If the referent cannot be found, the rule is not included in the route. The controller should raise the \"ResolvedRefs\" condition on the Gateway with the \"DegradedRoutes\" reason. The gateway status for this route should be updated with a condition that describes the error more specifically. \n Support: Custom"
                                      properties:
                                        group:
                                          description: Group is the group of the referent.
                                          maxLength: 253
                                          minLength: 1
                                          type: string
                                        kind:
                                          description: Kind is kind of the referent.
                                          maxLength: 253
                                          minLength: 1
                                          type: string
                                        name:
                                          description: Name is the name of the referent.
                                          maxLength: 253
                                          minLength: 1
                                          type: string
                                      required:
                                      - group
                                      - kind
                                      - name
                                      type: object
                                    port:
                                      description: "Port specifies the destination port number to use for the backend referenced by the ServiceName or BackendRef field. \n If unspecified, the destination port in the request is used when forwarding to a backendRef or serviceName."
                                      format: int32
                                      maximum: 65535
                                      minimum: 1
                                      type: integer
                                    serviceName:
                                      description: "ServiceName refers to the name of the Service to mirror matched requests to. When specified, this takes the place of BackendRef. If both BackendRef and ServiceName are specified, ServiceName will be given precedence. \n If the referent cannot be found, the rule is not included in the route. The controller should raise the \"ResolvedRefs\" condition on the Gateway with the \"DegradedRoutes\" reason. The gateway status for this route should be updated with a condition that describes the error more specifically. \n Support: Core"
                                      maxLength: 253
                                      type: string
                                  type: object
                                type:
                                  description: "Type identifies the type of filter to apply. As with other API fields, types are classified into three conformance levels: \n - Core: Filter types and their corresponding configuration defined by   \"Support: Core\" in this package, e.g. \"RequestHeaderModifier\". All   implementations must support core filters. \n - Extended: Filter types and their corresponding configuration defined by   \"Support: Extended\" in this package, e.g. \"RequestMirror\". Implementers   are encouraged to support extended filters. \n - Custom: Filters that are defined and supported by specific vendors.   In the future, filters showing convergence in behavior across multiple   implementations will be considered for inclusion in extended or core   conformance levels. Filter-specific configuration for such filters   is specified using the ExtensionRef field. `Type` should be set to   \"ExtensionRef\" for custom filters. \n Implementers are encouraged to define custom implementation types to extend the core API with implementation-specific behavior."
                                  enum:
                                  - RequestHeaderModifier
                                  - RequestMirror
                                  - ExtensionRef
                                  type: string
                              required:
                              - type
                              type: object
                            maxItems: 16
                            type: array
                          port:
                            description: "Port specifies the destination port number to use for the backend referenced by the ServiceName or BackendRef field. If unspecified, the destination port in the request is used when forwarding to a backendRef or serviceName. \n Support: Core"
                            format: int32
                            maximum: 65535
                            minimum: 1
                            type: integer
                          serviceName:
                            description: "ServiceName refers to the name of the Service to forward matched requests to. When specified, this takes the place of BackendRef. If both BackendRef and ServiceName are specified, ServiceName will be given precedence. \n If the referent cannot be found, the route must be dropped from the Gateway. The controller should raise the \"ResolvedRefs\" condition on the Gateway with the \"DegradedRoutes\" reason. The gateway status for this route should be updated with a condition that describes the error more specifically. \n The protocol to use should be specified with the AppProtocol field on Service resources. This field was introduced in Kubernetes 1.18. If using an earlier version of Kubernetes, a `networking.x-k8s.io/app-protocol` annotation on the BackendPolicy resource may be used to define the protocol. If the AppProtocol field is available, this annotation should not be used. The AppProtocol field, when populated, takes precedence over the annotation in the BackendPolicy resource. For custom backends, it is encouraged to add a semantically-equivalent field in the Custom Resource Definition. \n Support: Core"
                            maxLength: 253
                            type: string
                          weight:
                            default: 1
                            description: "Weight specifies the proportion of HTTP requests forwarded to the backend referenced by the ServiceName or BackendRef field. This is computed as weight/(sum of all weights in this ForwardTo list). For non-zero values, there may be some epsilon from the exact proportion defined here depending on the precision an implementation supports. Weight is not a percentage and the sum of weights does not need to equal 100. \n If only one backend is specified and it has a weight greater than 0, 100% of the traffic is forwarded to that backend. If weight is set to 0, no traffic should be forwarded for this entry. If unspecified, weight defaults to 1. \n Support: Core"
                            format: int32
                            maximum: 1000000
                            minimum: 0
                            type: integer
                        type: object
                      maxItems: 16
                      type: array
                    matches:
                      default:
                      - path:
                          type: Prefix
                          value: /
                      description: "Matches define conditions used for matching the rule against incoming HTTP requests. Each match is independent, i.e. this rule will be matched if **any** one of the matches is satisfied. \n For example, take the following matches configuration: \n ``` matches: - path:     value: \"/foo\"   headers:     values:       version: \"2\" - path:     value: \"/v2/foo\" ``` \n For a request to match against this rule, a request should satisfy EITHER of the two conditions: \n - path prefixed with `/foo` AND contains the header `version: \"2\"` - path prefix of `/v2/foo` \n See the documentation for HTTPRouteMatch on how to specify multiple match conditions that should be ANDed together. \n If no matches are specified, the default is a prefix path match on \"/\", which has the effect of matching every HTTP request. \n A client request may match multiple HTTP route rules. Matching precedence MUST be determined in order of the following criteria, continuing on ties: \n * The longest matching hostname. * The longest matching path. * The largest number of header matches * The oldest Route based on creation timestamp. For example, a Route with   a creation timestamp of \"2020-09-08 01:02:03\" is given precedence over   a Route with a creation timestamp of \"2020-09-08 01:02:04\". * The Route appearing first in alphabetical order (namespace/name) for   example, foo/bar is given precedence over foo/baz."
                      items:
                        description: "HTTPRouteMatch defines the predicate used to match requests to a given action. Multiple match types are ANDed together, i.e. the match will evaluate to true only if all conditions are satisfied. \n For example, the match below will match a HTTP request only if its path starts with `/foo` AND it contains the `version: \"1\"` header: \n ``` match:   path:     value: \"/foo\"   headers:     values:       version: \"1\" ```"
                        properties:
                          extensionRef:
                            description: "ExtensionRef is an optional, implementation-specific extension to the \"match\" behavior. For example, resource \"myroutematcher\" in group \"networking.acme.io\". If the referent cannot be found, the rule is not included in the route. The controller should raise the \"ResolvedRefs\" condition on the Gateway with the \"DegradedRoutes\" reason. The gateway status for this route should be updated with a condition that describes the error more specifically. \n Support: Custom"
                            properties:
                              group:
                                description: Group is the group of the referent.
                                maxLength: 253
                                minLength: 1
                                type: string
                              kind:
                                description: Kind is kind of the referent.
                                maxLength: 253
                                minLength: 1
                                type: string
                              name:
                                description: Name is the name of the referent.
                                maxLength: 253
                                minLength: 1
                                type: string
                            required:
                            - group
                            - kind
                            - name
                            type: object
                          headers:
                            description: Headers specifies a HTTP request header matcher.
                            properties:
                              type:
                                default: Exact
                                description: "Type specifies how to match against the value of the header. \n Support: Core (Exact) \n Support: Custom (RegularExpression, ImplementationSpecific) \n Since RegularExpression PathType has custom conformance, implementations can support POSIX, PCRE or any other dialects of regular expressions. Please read the implementation's documentation to determine the supported dialect. \n HTTP Header name matching MUST be case-insensitive (RFC 2616 - section 4.2)."
                                enum:
                                - Exact
                                - RegularExpression
                                - ImplementationSpecific
                                type: string
                              values:
                                additionalProperties:
                                  type: string
                                description: "Values is a map of HTTP Headers to be matched. It MUST contain at least one entry. \n The HTTP header field name to match is the map key, and the value of the HTTP header is the map value. HTTP header field name matching MUST be case-insensitive. \n Multiple match values are ANDed together, meaning, a request must match all the specified headers to select the route."
                                type: object
                            required:
                            - values
                            type: object
                          path:
                            default:
                              type: Prefix
                              value: /
                            description: Path specifies a HTTP request path matcher. If this field is not specified, a default prefix match on the "/" path is provided.
                            properties:
                              type:
                                default: Prefix
                                description: "Type specifies how to match against the path Value. \n Support: Core (Exact, Prefix) \n Support: Custom (RegularExpression, ImplementationSpecific) \n Since RegularExpression PathType has custom conformance, implementations can support POSIX, PCRE or any other dialects of regular expressions. Please read the implementation's documentation to determine the supported dialect."
                                enum:
                                - Exact
                                - Prefix
                                - RegularExpression
                                - ImplementationSpecific
                                type: string
                              value:
                                description: Value of the HTTP path to match against.
                                minLength: 1
                                type: string
                            required:
                            - value
                            type: object
                        type: object
                      maxItems: 8
                      type: array
                  type: object
                maxItems: 16
                type: array
              tls:
                description: "TLS defines the TLS certificate to use for Hostnames defined in this Route. This configuration only takes effect if the AllowRouteOverride field is set to true in the associated Gateway resource. \n Collisions can happen if multiple HTTPRoutes define a TLS certificate for the same hostname. In such a case, conflict resolution guiding principles apply, specifically, if hostnames are same and two different certificates are specified then the certificate in the oldest resource wins. \n Please note that HTTP Route-selection takes place after the TLS Handshake (ClientHello). Due to this, TLS certificate defined here will take precedence even if the request has the potential to match multiple routes (in case multiple HTTPRoutes share the same hostname). \n Support: Core"
                properties:
                  certificateRef:
                    description: "CertificateRef refers to a Kubernetes object that contains a TLS certificate and private key. This certificate MUST be used for TLS handshakes for the domain this RouteTLSConfig is associated with. If an entry in this list omits or specifies the empty string for both the group and kind, the resource defaults to \"secrets\". An implementation may support other resources (for example, resource \"mycertificates\" in group \"networking.acme.io\"). \n Support: Core (Kubernetes Secrets) \n Support: Implementation-specific (Other resource types)"
                    properties:
                      group:
                        description: Group is the group of the referent.
                        maxLength: 253
                        minLength: 1
                        type: string
                      kind:
                        description: Kind is kind of the referent.
                        maxLength: 253
                        minLength: 1
                        type: string
                      name:
                        description: Name is the name of the referent.
                        maxLength: 253
                        minLength: 1
                        type: string
                    required:
                    - group
                    - kind
                    - name
                    type: object
                required:
                - certificateRef
                type: object
            type: object
          status:
            description: Status defines the current state of HTTPRoute.
            properties:
              gateways:
                description: "Gateways is a list of Gateways that are associated with the route, and the status of the route with respect to each Gateway. When a Gateway selects this route, the controller that manages the Gateway must add an entry to this list when the controller first sees the route and should update the entry as appropriate when the route is modified. \n A maximum of 100 Gateways will be represented in this list. If this list is full, there may be additional Gateways using this Route that are not included in the list. An empty list means the route has not been admitted by any Gateway."
                items:
                  description: RouteGatewayStatus describes the status of a route with respect to an associated Gateway.
                  properties:
                    conditions:
                      description: Conditions describes the status of the route with respect to the Gateway. The "Admitted" condition must always be specified by controllers to indicate whether the route has been admitted or rejected by the Gateway, and why. Note that the route's availability is also subject to the Gateway's own status conditions and listener status.
                      items:
                        description: "Condition contains details for one aspect of the current state of this API Resource. --- This struct is intended for direct use as an array at the field path .status.conditions.  For example, type FooStatus struct{     // Represents the observations of a foo's current state.     // Known .status.conditions.type are: \"Available\", \"Progressing\", and \"Degraded\"     // +patchMergeKey=type     // +patchStrategy=merge     // +listType=map     // +listMapKey=type     Conditions []metav1.Condition `json:\"conditions,omitempty\" patchStrategy:\"merge\" patchMergeKey:\"type\" protobuf:\"bytes,1,rep,name=conditions\"` \n     // other fields }"
                        properties:
                          lastTransitionTime:
                            description: lastTransitionTime is the last time the condition transitioned from one status to another. This should be when the underlying condition changed.  If that is not known, then using the time when the API field changed is acceptable.
                            format: date-time
                            type: string
                          message:
                            description: message is a human readable message indicating details about the transition. This may be an empty string.
                            maxLength: 32768
                            type: string
                          observedGeneration:
                            description: observedGeneration represents the .metadata.generation that the condition was set based upon. For instance, if .metadata.generation is currently 12, but the .status.conditions[x].observedGeneration is 9, the condition is out of date with respect to the current state of the instance.
                            format: int64
                            minimum: 0
                            type: integer
                          reason:
                            description: reason contains a programmatic identifier indicating the reason for the condition's last transition. Producers of specific condition types may define expected values and meanings for this field, and whether the values are considered a guaranteed API. The value should be a CamelCase string. This field may not be empty.
                            maxLength: 1024
                            minLength: 1
                            pattern: ^[A-Za-z]([A-Za-z0-9_,:]*[A-Za-z0-9_])?$
                            type: string
                          status:
                            description: status of the condition, one of True, False, Unknown.
                            enum:
                            - "True"
                            - "False"
                            - Unknown
                            type: string
                          type:
                            description: type of condition in CamelCase or in foo.example.com/CamelCase. --- Many .condition.type values are consistent across resources like Available, but because arbitrary conditions can be useful (see .node.status.conditions), the ability to deconflict is important. The regex it matches is (dns1123SubdomainFmt/)?(qualifiedNameFmt)
                            maxLength: 316
                            pattern: ^([a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*/)?(([A-Za-z0-9][-A-Za-z0-9_.]*)?[A-Za-z0-9])$
                            type: string
                        required:
                        - lastTransitionTime
                        - message
                        - reason
                        - status
                        - type
                        type: object
                      maxItems: 8
                      type: array
                      x-kubernetes-list-map-keys:
                      - type
                      x-kubernetes-list-type: map
                    gatewayRef:
                      description: GatewayRef is a reference to a Gateway object that is associated with the route.
                      properties:
                        name:
                          description: Name is the name of the referent.
                          maxLength: 253
                          minLength: 1
                          type: string
                        namespace:
                          description: Namespace is the namespace of the referent.
                          maxLength: 253
                          minLength: 1
                          type: string
                      required:
                      - name
                      - namespace
                      type: object
                  required:
                  - gatewayRef
                  type: object
                maxItems: 100
                type: array
            required:
            - gateways
            type: object
        type: object
    served: true
    storage: true
    subresources:
      status: {}
status:
  acceptedNames:
    kind: ""
    plural: ""
  conditions: []
  storedVersions: []
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  name: gateway-role
rules:
  - apiGroups:
      - ""
    resources:
      - services
      - endpoints
      - secrets
    verbs:
      - get
      - list
      - watch
  - apiGroups:
      - networking.x-k8s.io
    resources:
      - gatewayclasses
      - gateways
      - httproutes
    verbs:
      - get
      - list
      - watch
  - apiGroups:
      - networking.x-k8s.io
    resources:
      - gatewayclasses/status
      - gateways/status
      - httproutes/status
    verbs:
      - update

---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1beta1
metadata:
  name: gateway-controller

roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: gateway-role
subjects:
  - kind: ServiceAccount
    name: traefik-controller
    namespace: default

The Kubernetes Gateway API project provides several guides on how to use the APIs. These guides can help you to go further than the example above. The getting started guide details how to install the CRDs from their repository.

Keep in mind that the Traefik Gateway provider only supports the v0.1.0.

For now, the Traefik Gateway Provider can be used while following the below guides:

Resource Configuration

When using Kubernetes Gateway API as a provider, Traefik uses Kubernetes Custom Resource Definitions to retrieve its routing configuration.

All concepts can be found in the official API concepts documentation. Traefik implements the following resources:

  • GatewayClass defines a set of Gateways that share a common configuration and behaviour.
  • Gateway describes how traffic can be translated to Services within the cluster.
  • HTTPRoute define HTTP rules for mapping requests from a Gateway to Kubernetes Services.

Provider Configuration

endpoint

Optional, Default=""

The Kubernetes server endpoint URL.

When deployed into Kubernetes, Traefik reads the environment variables KUBERNETES_SERVICE_HOST and KUBERNETES_SERVICE_PORT or KUBECONFIG to construct the endpoint.

The access token is looked up in /var/run/secrets/kubernetes.io/serviceaccount/token and the SSL CA certificate in /var/run/secrets/kubernetes.io/serviceaccount/ca.crt. Both are mounted automatically when deployed inside Kubernetes.

The endpoint may be specified to override the environment variable values inside a cluster.

When the environment variables are not found, Traefik tries to connect to the Kubernetes API server with an external-cluster client. In this case, the endpoint is required. Specifically, it may be set to the URL used by kubectl proxy to connect to a Kubernetes cluster using the granted authentication and authorization of the associated kubeconfig.

providers:
  kubernetesGateway:
    endpoint: "http://localhost:8080"
    # ...
[providers.kubernetesGateway]
  endpoint = "http://localhost:8080"
  # ...
--providers.kubernetesgateway.endpoint=http://localhost:8080

token

Optional, Default=""

Bearer token used for the Kubernetes client configuration.

providers:
  kubernetesGateway:
    token: "mytoken"
    # ...
[providers.kubernetesGateway]
  token = "mytoken"
  # ...
--providers.kubernetesgateway.token=mytoken

certAuthFilePath

Optional, Default=""

Path to the certificate authority file. Used for the Kubernetes client configuration.

providers:
  kubernetesGateway:
    certAuthFilePath: "/my/ca.crt"
    # ...
[providers.kubernetesGateway]
  certAuthFilePath = "/my/ca.crt"
  # ...
--providers.kubernetesgateway.certauthfilepath=/my/ca.crt

namespaces

Optional, Default: []

Array of namespaces to watch. If left empty, watches all namespaces if the value of namespaces.

providers:
  kubernetesGateway:
    namespaces:
    - "default"
    - "production"
    # ...
[providers.kubernetesGateway]
  namespaces = ["default", "production"]
  # ...
--providers.kubernetesgateway.namespaces=default,production

labelselector

Optional, Default: ""

A label selector can be defined to filter on specific GatewayClass objects only. If left empty, Traefik processes all GatewayClass objects in the configured namespaces.

See label-selectors for details.

providers:
  kubernetesGateway:
    labelselector: "app=traefik"
    # ...
[providers.kubernetesGateway]
  labelselector = "app=traefik"
  # ...
--providers.kubernetesgateway.labelselector="app=traefik"

throttleDuration

Optional, Default: 0

The throttleDuration option defines how often the provider is allowed to handle events from Kubernetes. This prevents a Kubernetes cluster that updates many times per second from continuously changing your Traefik configuration.

If left empty, the provider does not apply any throttling and does not drop any Kubernetes events.

The value of throttleDuration should be provided in seconds or as a valid duration format, see time.ParseDuration.

providers:
  kubernetesGateway:
    throttleDuration: "10s"
    # ...
[providers.kubernetesGateway]
  throttleDuration = "10s"
  # ...
--providers.kubernetesgateway.throttleDuration=10s