Traefik & Kubernetes¶
The Kubernetes Ingress Controller, The Custom Resource Way.
In early versions, Traefik supported Kubernetes only through the Kubernetes Ingress provider, which is a Kubernetes Ingress controller in the strict sense of the term.
However, as the community expressed the need to benefit from Traefik features without resorting to (lots of) annotations, the Traefik engineering team developed a Custom Resource Definition (CRD) for an IngressRoute type, defined below, in order to provide a better way to configure access to a Kubernetes cluster.
Configuration Requirements¶
All Steps for a Successful Deployment
- Add/update all the Traefik resources definitions
- Add/update the RBAC for the Traefik custom resources
- Use Helm Chart or use a custom Traefik Deployment
- Enable the kubernetesCRD provider
- Apply the needed kubernetesCRD provider configuration
- Add all necessary Traefik custom resources
Deprecated apiextensions.k8s.io/v1beta1 CRD
The apiextensions.k8s.io/v1beta1 CustomResourceDefinition is deprecated in Kubernetes v1.16+ and will be removed in v1.22+.
For Kubernetes v1.16+, please use the Traefik apiextensions.k8s.io/v1 CRDs instead.
Initializing Resource Definition and RBAC
# All resources definition must be declared
---
apiVersion: apiextensions.k8s.io/v1
kind: CustomResourceDefinition
metadata:
annotations:
controller-gen.kubebuilder.io/version: v0.6.2
creationTimestamp: null
name: ingressroutes.traefik.containo.us
spec:
group: traefik.containo.us
names:
kind: IngressRoute
listKind: IngressRouteList
plural: ingressroutes
singular: ingressroute
scope: Namespaced
versions:
- name: v1alpha1
schema:
openAPIV3Schema:
description: IngressRoute is an Ingress CRD specification.
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: IngressRouteSpec is a specification for a IngressRouteSpec
resource.
properties:
entryPoints:
items:
type: string
type: array
routes:
items:
description: Route contains the set of routes.
properties:
kind:
enum:
- Rule
type: string
match:
type: string
middlewares:
items:
description: MiddlewareRef is a ref to the Middleware resources.
properties:
name:
type: string
namespace:
type: string
required:
- name
type: object
type: array
priority:
type: integer
services:
items:
description: Service defines an upstream to proxy traffic.
properties:
kind:
enum:
- Service
- TraefikService
type: string
name:
description: Name is a reference to a Kubernetes Service
object (for a load-balancer of servers), or to a TraefikService
object (service load-balancer, mirroring, etc). The
differentiation between the two is specified in the
Kind field.
type: string
namespace:
type: string
passHostHeader:
type: boolean
port:
anyOf:
- type: integer
- type: string
x-kubernetes-int-or-string: true
responseForwarding:
description: ResponseForwarding holds configuration for
the forward of the response.
properties:
flushInterval:
type: string
type: object
scheme:
type: string
serversTransport:
type: string
sticky:
description: Sticky holds the sticky configuration.
properties:
cookie:
description: Cookie holds the sticky configuration
based on cookie.
properties:
httpOnly:
type: boolean
name:
type: string
sameSite:
type: string
secure:
type: boolean
type: object
type: object
strategy:
type: string
weight:
description: Weight should only be specified when Name
references a TraefikService object (and to be precise,
one that embeds a Weighted Round Robin).
type: integer
required:
- name
type: object
type: array
required:
- kind
- match
type: object
type: array
tls:
description: "TLS contains the TLS certificates configuration of the
routes. To enable Let's Encrypt, use an empty TLS struct, e.g. in
YAML: \n \t tls: {} # inline format \n \t tls: \t secretName:
# block format"
properties:
certResolver:
type: string
domains:
items:
description: Domain holds a domain name with SANs.
properties:
main:
type: string
sans:
items:
type: string
type: array
type: object
type: array
options:
description: Options is a reference to a TLSOption, that specifies
the parameters of the TLS connection.
properties:
name:
type: string
namespace:
type: string
required:
- name
type: object
secretName:
description: SecretName is the name of the referenced Kubernetes
Secret to specify the certificate details.
type: string
store:
description: Store is a reference to a TLSStore, that specifies
the parameters of the TLS store.
properties:
name:
type: string
namespace:
type: string
required:
- name
type: object
type: object
required:
- routes
type: object
required:
- metadata
- spec
type: object
served: true
storage: true
status:
acceptedNames:
kind: ""
plural: ""
conditions: []
storedVersions: []
---
apiVersion: apiextensions.k8s.io/v1
kind: CustomResourceDefinition
metadata:
annotations:
controller-gen.kubebuilder.io/version: v0.6.2
creationTimestamp: null
name: ingressroutetcps.traefik.containo.us
spec:
group: traefik.containo.us
names:
kind: IngressRouteTCP
listKind: IngressRouteTCPList
plural: ingressroutetcps
singular: ingressroutetcp
scope: Namespaced
versions:
- name: v1alpha1
schema:
openAPIV3Schema:
description: IngressRouteTCP is an Ingress CRD specification.
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: IngressRouteTCPSpec is a specification for a IngressRouteTCPSpec
resource.
properties:
entryPoints:
items:
type: string
type: array
routes:
items:
description: RouteTCP contains the set of routes.
properties:
match:
type: string
middlewares:
description: Middlewares contains references to MiddlewareTCP
resources.
items:
description: ObjectReference is a generic reference to a Traefik
resource.
properties:
name:
type: string
namespace:
type: string
required:
- name
type: object
type: array
services:
items:
description: ServiceTCP defines an upstream to proxy traffic.
properties:
name:
type: string
namespace:
type: string
port:
anyOf:
- type: integer
- type: string
x-kubernetes-int-or-string: true
proxyProtocol:
description: ProxyProtocol holds the ProxyProtocol configuration.
properties:
version:
type: integer
type: object
terminationDelay:
type: integer
weight:
type: integer
required:
- name
- port
type: object
type: array
required:
- match
type: object
type: array
tls:
description: "TLSTCP contains the TLS certificates configuration of
the routes. To enable Let's Encrypt, use an empty TLS struct, e.g.
in YAML: \n \t tls: {} # inline format \n \t tls: \t secretName:
# block format"
properties:
certResolver:
type: string
domains:
items:
description: Domain holds a domain name with SANs.
properties:
main:
type: string
sans:
items:
type: string
type: array
type: object
type: array
options:
description: Options is a reference to a TLSOption, that specifies
the parameters of the TLS connection.
properties:
name:
type: string
namespace:
type: string
required:
- name
type: object
passthrough:
type: boolean
secretName:
description: SecretName is the name of the referenced Kubernetes
Secret to specify the certificate details.
type: string
store:
description: Store is a reference to a TLSStore, that specifies
the parameters of the TLS store.
properties:
name:
type: string
namespace:
type: string
required:
- name
type: object
type: object
required:
- routes
type: object
required:
- metadata
- spec
type: object
served: true
storage: true
status:
acceptedNames:
kind: ""
plural: ""
conditions: []
storedVersions: []
---
apiVersion: apiextensions.k8s.io/v1
kind: CustomResourceDefinition
metadata:
annotations:
controller-gen.kubebuilder.io/version: v0.6.2
creationTimestamp: null
name: ingressrouteudps.traefik.containo.us
spec:
group: traefik.containo.us
names:
kind: IngressRouteUDP
listKind: IngressRouteUDPList
plural: ingressrouteudps
singular: ingressrouteudp
scope: Namespaced
versions:
- name: v1alpha1
schema:
openAPIV3Schema:
description: IngressRouteUDP is an Ingress CRD specification.
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: IngressRouteUDPSpec is a specification for a IngressRouteUDPSpec
resource.
properties:
entryPoints:
items:
type: string
type: array
routes:
items:
description: RouteUDP contains the set of routes.
properties:
services:
items:
description: ServiceUDP defines an upstream to proxy traffic.
properties:
name:
type: string
namespace:
type: string
port:
anyOf:
- type: integer
- type: string
x-kubernetes-int-or-string: true
weight:
type: integer
required:
- name
- port
type: object
type: array
type: object
type: array
required:
- routes
type: object
required:
- metadata
- spec
type: object
served: true
storage: true
status:
acceptedNames:
kind: ""
plural: ""
conditions: []
storedVersions: []
---
apiVersion: apiextensions.k8s.io/v1
kind: CustomResourceDefinition
metadata:
annotations:
controller-gen.kubebuilder.io/version: v0.6.2
creationTimestamp: null
name: middlewares.traefik.containo.us
spec:
group: traefik.containo.us
names:
kind: Middleware
listKind: MiddlewareList
plural: middlewares
singular: middleware
scope: Namespaced
versions:
- name: v1alpha1
schema:
openAPIV3Schema:
description: Middleware is a specification for a Middleware 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: MiddlewareSpec holds the Middleware configuration.
properties:
addPrefix:
description: AddPrefix holds the AddPrefix configuration.
properties:
prefix:
type: string
type: object
basicAuth:
description: BasicAuth holds the HTTP basic authentication configuration.
properties:
headerField:
type: string
realm:
type: string
removeHeader:
type: boolean
secret:
type: string
type: object
buffering:
description: Buffering holds the request/response buffering configuration.
properties:
maxRequestBodyBytes:
format: int64
type: integer
maxResponseBodyBytes:
format: int64
type: integer
memRequestBodyBytes:
format: int64
type: integer
memResponseBodyBytes:
format: int64
type: integer
retryExpression:
type: string
type: object
chain:
description: Chain holds a chain of middlewares.
properties:
middlewares:
items:
description: MiddlewareRef is a ref to the Middleware resources.
properties:
name:
type: string
namespace:
type: string
required:
- name
type: object
type: array
type: object
circuitBreaker:
description: CircuitBreaker holds the circuit breaker configuration.
properties:
expression:
type: string
type: object
compress:
description: Compress holds the compress configuration.
properties:
excludedContentTypes:
items:
type: string
type: array
type: object
contentType:
description: ContentType middleware - or rather its unique `autoDetect`
option - specifies whether to let the `Content-Type` header, if
it has not been set by the backend, be automatically set to a value
derived from the contents of the response. As a proxy, the default
behavior should be to leave the header alone, regardless of what
the backend did with it. However, the historic default was to always
auto-detect and set the header if it was nil, and it is going to
be kept that way in order to support users currently relying on
it. This middleware exists to enable the correct behavior until
at least the default one can be changed in a future version.
properties:
autoDetect:
type: boolean
type: object
digestAuth:
description: DigestAuth holds the Digest HTTP authentication configuration.
properties:
headerField:
type: string
realm:
type: string
removeHeader:
type: boolean
secret:
type: string
type: object
errors:
description: ErrorPage holds the custom error page configuration.
properties:
query:
type: string
service:
description: Service defines an upstream to proxy traffic.
properties:
kind:
enum:
- Service
- TraefikService
type: string
name:
description: Name is a reference to a Kubernetes Service object
(for a load-balancer of servers), or to a TraefikService
object (service load-balancer, mirroring, etc). The differentiation
between the two is specified in the Kind field.
type: string
namespace:
type: string
passHostHeader:
type: boolean
port:
anyOf:
- type: integer
- type: string
x-kubernetes-int-or-string: true
responseForwarding:
description: ResponseForwarding holds configuration for the
forward of the response.
properties:
flushInterval:
type: string
type: object
scheme:
type: string
serversTransport:
type: string
sticky:
description: Sticky holds the sticky configuration.
properties:
cookie:
description: Cookie holds the sticky configuration based
on cookie.
properties:
httpOnly:
type: boolean
name:
type: string
sameSite:
type: string
secure:
type: boolean
type: object
type: object
strategy:
type: string
weight:
description: Weight should only be specified when Name references
a TraefikService object (and to be precise, one that embeds
a Weighted Round Robin).
type: integer
required:
- name
type: object
status:
items:
type: string
type: array
type: object
forwardAuth:
description: ForwardAuth holds the http forward authentication configuration.
properties:
address:
type: string
authRequestHeaders:
items:
type: string
type: array
authResponseHeaders:
items:
type: string
type: array
authResponseHeadersRegex:
type: string
tls:
description: ClientTLS holds TLS specific configurations as client.
properties:
caOptional:
type: boolean
caSecret:
type: string
certSecret:
type: string
insecureSkipVerify:
type: boolean
type: object
trustForwardHeader:
type: boolean
type: object
headers:
description: Headers holds the custom header configuration.
properties:
accessControlAllowCredentials:
description: AccessControlAllowCredentials is only valid if true.
false is ignored.
type: boolean
accessControlAllowHeaders:
description: AccessControlAllowHeaders must be used in response
to a preflight request with Access-Control-Request-Headers set.
items:
type: string
type: array
accessControlAllowMethods:
description: AccessControlAllowMethods must be used in response
to a preflight request with Access-Control-Request-Method set.
items:
type: string
type: array
accessControlAllowOriginList:
description: AccessControlAllowOriginList is a list of allowable
origins. Can also be a wildcard origin "*".
items:
type: string
type: array
accessControlAllowOriginListRegex:
description: AccessControlAllowOriginListRegex is a list of allowable
origins written following the Regular Expression syntax (https://golang.org/pkg/regexp/).
items:
type: string
type: array
accessControlExposeHeaders:
description: AccessControlExposeHeaders sets valid headers for
the response.
items:
type: string
type: array
accessControlMaxAge:
description: AccessControlMaxAge sets the time that a preflight
request may be cached.
format: int64
type: integer
addVaryHeader:
description: AddVaryHeader controls if the Vary header is automatically
added/updated when the AccessControlAllowOriginList is set.
type: boolean
allowedHosts:
items:
type: string
type: array
browserXssFilter:
type: boolean
contentSecurityPolicy:
type: string
contentTypeNosniff:
type: boolean
customBrowserXSSValue:
type: string
customFrameOptionsValue:
type: string
customRequestHeaders:
additionalProperties:
type: string
type: object
customResponseHeaders:
additionalProperties:
type: string
type: object
featurePolicy:
description: 'Deprecated: use PermissionsPolicy instead.'
type: string
forceSTSHeader:
type: boolean
frameDeny:
type: boolean
hostsProxyHeaders:
items:
type: string
type: array
isDevelopment:
type: boolean
permissionsPolicy:
type: string
publicKey:
type: string
referrerPolicy:
type: string
sslForceHost:
description: 'Deprecated: use RedirectRegex instead.'
type: boolean
sslHost:
description: 'Deprecated: use RedirectRegex instead.'
type: string
sslProxyHeaders:
additionalProperties:
type: string
type: object
sslRedirect:
description: 'Deprecated: use EntryPoint redirection or RedirectScheme
instead.'
type: boolean
sslTemporaryRedirect:
description: 'Deprecated: use EntryPoint redirection or RedirectScheme
instead.'
type: boolean
stsIncludeSubdomains:
type: boolean
stsPreload:
type: boolean
stsSeconds:
format: int64
type: integer
type: object
inFlightReq:
description: InFlightReq limits the number of requests being processed
and served concurrently.
properties:
amount:
format: int64
type: integer
sourceCriterion:
description: SourceCriterion defines what criterion is used to
group requests as originating from a common source. If none
are set, the default is to use the request's remote address
field. All fields are mutually exclusive.
properties:
ipStrategy:
description: IPStrategy holds the ip strategy configuration.
properties:
depth:
type: integer
excludedIPs:
items:
type: string
type: array
type: object
requestHeaderName:
type: string
requestHost:
type: boolean
type: object
type: object
ipWhiteList:
description: IPWhiteList holds the ip white list configuration.
properties:
ipStrategy:
description: IPStrategy holds the ip strategy configuration.
properties:
depth:
type: integer
excludedIPs:
items:
type: string
type: array
type: object
sourceRange:
items:
type: string
type: array
type: object
passTLSClientCert:
description: PassTLSClientCert holds the TLS client cert headers configuration.
properties:
info:
description: TLSClientCertificateInfo holds the client TLS certificate
info configuration.
properties:
issuer:
description: TLSClientCertificateDNInfo holds the client TLS
certificate distinguished name info configuration. cf https://tools.ietf.org/html/rfc3739
properties:
commonName:
type: boolean
country:
type: boolean
domainComponent:
type: boolean
locality:
type: boolean
organization:
type: boolean
province:
type: boolean
serialNumber:
type: boolean
type: object
notAfter:
type: boolean
notBefore:
type: boolean
sans:
type: boolean
serialNumber:
type: boolean
subject:
description: TLSClientCertificateDNInfo holds the client TLS
certificate distinguished name info configuration. cf https://tools.ietf.org/html/rfc3739
properties:
commonName:
type: boolean
country:
type: boolean
domainComponent:
type: boolean
locality:
type: boolean
organization:
type: boolean
province:
type: boolean
serialNumber:
type: boolean
type: object
type: object
pem:
type: boolean
type: object
plugin:
additionalProperties:
x-kubernetes-preserve-unknown-fields: true
type: object
rateLimit:
description: RateLimit holds the rate limiting configuration for a
given router.
properties:
average:
format: int64
type: integer
burst:
format: int64
type: integer
period:
anyOf:
- type: integer
- type: string
x-kubernetes-int-or-string: true
sourceCriterion:
description: SourceCriterion defines what criterion is used to
group requests as originating from a common source. If none
are set, the default is to use the request's remote address
field. All fields are mutually exclusive.
properties:
ipStrategy:
description: IPStrategy holds the ip strategy configuration.
properties:
depth:
type: integer
excludedIPs:
items:
type: string
type: array
type: object
requestHeaderName:
type: string
requestHost:
type: boolean
type: object
type: object
redirectRegex:
description: RedirectRegex holds the redirection configuration.
properties:
permanent:
type: boolean
regex:
type: string
replacement:
type: string
type: object
redirectScheme:
description: RedirectScheme holds the scheme redirection configuration.
properties:
permanent:
type: boolean
port:
type: string
scheme:
type: string
type: object
replacePath:
description: ReplacePath holds the ReplacePath configuration.
properties:
path:
type: string
type: object
replacePathRegex:
description: ReplacePathRegex holds the ReplacePathRegex configuration.
properties:
regex:
type: string
replacement:
type: string
type: object
retry:
description: Retry holds the retry configuration.
properties:
attempts:
type: integer
initialInterval:
anyOf:
- type: integer
- type: string
x-kubernetes-int-or-string: true
type: object
stripPrefix:
description: StripPrefix holds the StripPrefix configuration.
properties:
forceSlash:
type: boolean
prefixes:
items:
type: string
type: array
type: object
stripPrefixRegex:
description: StripPrefixRegex holds the StripPrefixRegex configuration.
properties:
regex:
items:
type: string
type: array
type: object
type: object
required:
- metadata
- spec
type: object
served: true
storage: true
status:
acceptedNames:
kind: ""
plural: ""
conditions: []
storedVersions: []
---
apiVersion: apiextensions.k8s.io/v1
kind: CustomResourceDefinition
metadata:
annotations:
controller-gen.kubebuilder.io/version: v0.6.2
creationTimestamp: null
name: middlewaretcps.traefik.containo.us
spec:
group: traefik.containo.us
names:
kind: MiddlewareTCP
listKind: MiddlewareTCPList
plural: middlewaretcps
singular: middlewaretcp
scope: Namespaced
versions:
- name: v1alpha1
schema:
openAPIV3Schema:
description: MiddlewareTCP is a specification for a MiddlewareTCP 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: MiddlewareTCPSpec holds the MiddlewareTCP configuration.
properties:
ipWhiteList:
description: TCPIPWhiteList holds the TCP ip white list configuration.
properties:
sourceRange:
items:
type: string
type: array
type: object
type: object
required:
- metadata
- spec
type: object
served: true
storage: true
status:
acceptedNames:
kind: ""
plural: ""
conditions: []
storedVersions: []
---
apiVersion: apiextensions.k8s.io/v1
kind: CustomResourceDefinition
metadata:
annotations:
controller-gen.kubebuilder.io/version: v0.6.2
creationTimestamp: null
name: serverstransports.traefik.containo.us
spec:
group: traefik.containo.us
names:
kind: ServersTransport
listKind: ServersTransportList
plural: serverstransports
singular: serverstransport
scope: Namespaced
versions:
- name: v1alpha1
schema:
openAPIV3Schema:
description: ServersTransport is a specification for a ServersTransport 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: ServersTransportSpec options to configure communication between
Traefik and the servers.
properties:
certificatesSecrets:
description: Certificates for mTLS.
items:
type: string
type: array
disableHTTP2:
description: Disable HTTP/2 for connections with backend servers.
type: boolean
forwardingTimeouts:
description: Timeouts for requests forwarded to the backend servers.
properties:
dialTimeout:
anyOf:
- type: integer
- type: string
description: The amount of time to wait until a connection to
a backend server can be established. If zero, no timeout exists.
x-kubernetes-int-or-string: true
idleConnTimeout:
anyOf:
- type: integer
- type: string
description: The maximum period for which an idle HTTP keep-alive
connection will remain open before closing itself.
x-kubernetes-int-or-string: true
responseHeaderTimeout:
anyOf:
- type: integer
- type: string
description: The amount of time to wait for a server's response
headers after fully writing the request (including its body,
if any). If zero, no timeout exists.
x-kubernetes-int-or-string: true
type: object
insecureSkipVerify:
description: Disable SSL certificate verification.
type: boolean
maxIdleConnsPerHost:
description: If non-zero, controls the maximum idle (keep-alive) to
keep per-host. If zero, DefaultMaxIdleConnsPerHost is used.
type: integer
peerCertURI:
description: URI used to match against SAN URI during the peer certificate
verification.
type: string
rootCAsSecrets:
description: Add cert file for self-signed certificate.
items:
type: string
type: array
serverName:
description: ServerName used to contact the server.
type: string
type: object
required:
- metadata
- spec
type: object
served: true
storage: true
status:
acceptedNames:
kind: ""
plural: ""
conditions: []
storedVersions: []
---
apiVersion: apiextensions.k8s.io/v1
kind: CustomResourceDefinition
metadata:
annotations:
controller-gen.kubebuilder.io/version: v0.6.2
creationTimestamp: null
name: tlsoptions.traefik.containo.us
spec:
group: traefik.containo.us
names:
kind: TLSOption
listKind: TLSOptionList
plural: tlsoptions
singular: tlsoption
scope: Namespaced
versions:
- name: v1alpha1
schema:
openAPIV3Schema:
description: TLSOption is a specification for a TLSOption 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: TLSOptionSpec configures TLS for an entry point.
properties:
alpnProtocols:
items:
type: string
type: array
cipherSuites:
items:
type: string
type: array
clientAuth:
description: ClientAuth defines the parameters of the client authentication
part of the TLS connection, if any.
properties:
clientAuthType:
description: ClientAuthType defines the client authentication
type to apply.
enum:
- NoClientCert
- RequestClientCert
- RequireAnyClientCert
- VerifyClientCertIfGiven
- RequireAndVerifyClientCert
type: string
secretNames:
description: SecretName is the name of the referenced Kubernetes
Secret to specify the certificate details.
items:
type: string
type: array
type: object
curvePreferences:
items:
type: string
type: array
maxVersion:
type: string
minVersion:
type: string
preferServerCipherSuites:
type: boolean
sniStrict:
type: boolean
type: object
required:
- metadata
- spec
type: object
served: true
storage: true
status:
acceptedNames:
kind: ""
plural: ""
conditions: []
storedVersions: []
---
apiVersion: apiextensions.k8s.io/v1
kind: CustomResourceDefinition
metadata:
annotations:
controller-gen.kubebuilder.io/version: v0.6.2
creationTimestamp: null
name: tlsstores.traefik.containo.us
spec:
group: traefik.containo.us
names:
kind: TLSStore
listKind: TLSStoreList
plural: tlsstores
singular: tlsstore
scope: Namespaced
versions:
- name: v1alpha1
schema:
openAPIV3Schema:
description: TLSStore is a specification for a TLSStore 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: TLSStoreSpec configures a TLSStore resource.
properties:
defaultCertificate:
description: DefaultCertificate holds a secret name for the TLSOption
resource.
properties:
secretName:
description: SecretName is the name of the referenced Kubernetes
Secret to specify the certificate details.
type: string
required:
- secretName
type: object
required:
- defaultCertificate
type: object
required:
- metadata
- spec
type: object
served: true
storage: true
status:
acceptedNames:
kind: ""
plural: ""
conditions: []
storedVersions: []
---
apiVersion: apiextensions.k8s.io/v1
kind: CustomResourceDefinition
metadata:
annotations:
controller-gen.kubebuilder.io/version: v0.6.2
creationTimestamp: null
name: traefikservices.traefik.containo.us
spec:
group: traefik.containo.us
names:
kind: TraefikService
listKind: TraefikServiceList
plural: traefikservices
singular: traefikservice
scope: Namespaced
versions:
- name: v1alpha1
schema:
openAPIV3Schema:
description: TraefikService is the specification for a service (that an IngressRoute
refers to) that is usually not a terminal service (i.e. not a pod of servers),
as opposed to a Kubernetes Service. That is to say, it usually refers to
other (children) services, which themselves can be TraefikServices or Services.
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: ServiceSpec defines whether a TraefikService is a load-balancer
of services or a mirroring service.
properties:
mirroring:
description: Mirroring defines a mirroring service, which is composed
of a main load-balancer, and a list of mirrors.
properties:
kind:
enum:
- Service
- TraefikService
type: string
maxBodySize:
format: int64
type: integer
mirrors:
items:
description: MirrorService defines one of the mirrors of a Mirroring
service.
properties:
kind:
enum:
- Service
- TraefikService
type: string
name:
description: Name is a reference to a Kubernetes Service
object (for a load-balancer of servers), or to a TraefikService
object (service load-balancer, mirroring, etc). The differentiation
between the two is specified in the Kind field.
type: string
namespace:
type: string
passHostHeader:
type: boolean
percent:
type: integer
port:
anyOf:
- type: integer
- type: string
x-kubernetes-int-or-string: true
responseForwarding:
description: ResponseForwarding holds configuration for
the forward of the response.
properties:
flushInterval:
type: string
type: object
scheme:
type: string
serversTransport:
type: string
sticky:
description: Sticky holds the sticky configuration.
properties:
cookie:
description: Cookie holds the sticky configuration based
on cookie.
properties:
httpOnly:
type: boolean
name:
type: string
sameSite:
type: string
secure:
type: boolean
type: object
type: object
strategy:
type: string
weight:
description: Weight should only be specified when Name references
a TraefikService object (and to be precise, one that embeds
a Weighted Round Robin).
type: integer
required:
- name
type: object
type: array
name:
description: Name is a reference to a Kubernetes Service object
(for a load-balancer of servers), or to a TraefikService object
(service load-balancer, mirroring, etc). The differentiation
between the two is specified in the Kind field.
type: string
namespace:
type: string
passHostHeader:
type: boolean
port:
anyOf:
- type: integer
- type: string
x-kubernetes-int-or-string: true
responseForwarding:
description: ResponseForwarding holds configuration for the forward
of the response.
properties:
flushInterval:
type: string
type: object
scheme:
type: string
serversTransport:
type: string
sticky:
description: Sticky holds the sticky configuration.
properties:
cookie:
description: Cookie holds the sticky configuration based on
cookie.
properties:
httpOnly:
type: boolean
name:
type: string
sameSite:
type: string
secure:
type: boolean
type: object
type: object
strategy:
type: string
weight:
description: Weight should only be specified when Name references
a TraefikService object (and to be precise, one that embeds
a Weighted Round Robin).
type: integer
required:
- name
type: object
weighted:
description: WeightedRoundRobin defines a load-balancer of services.
properties:
services:
items:
description: Service defines an upstream to proxy traffic.
properties:
kind:
enum:
- Service
- TraefikService
type: string
name:
description: Name is a reference to a Kubernetes Service
object (for a load-balancer of servers), or to a TraefikService
object (service load-balancer, mirroring, etc). The differentiation
between the two is specified in the Kind field.
type: string
namespace:
type: string
passHostHeader:
type: boolean
port:
anyOf:
- type: integer
- type: string
x-kubernetes-int-or-string: true
responseForwarding:
description: ResponseForwarding holds configuration for
the forward of the response.
properties:
flushInterval:
type: string
type: object
scheme:
type: string
serversTransport:
type: string
sticky:
description: Sticky holds the sticky configuration.
properties:
cookie:
description: Cookie holds the sticky configuration based
on cookie.
properties:
httpOnly:
type: boolean
name:
type: string
sameSite:
type: string
secure:
type: boolean
type: object
type: object
strategy:
type: string
weight:
description: Weight should only be specified when Name references
a TraefikService object (and to be precise, one that embeds
a Weighted Round Robin).
type: integer
required:
- name
type: object
type: array
sticky:
description: Sticky holds the sticky configuration.
properties:
cookie:
description: Cookie holds the sticky configuration based on
cookie.
properties:
httpOnly:
type: boolean
name:
type: string
sameSite:
type: string
secure:
type: boolean
type: object
type: object
type: object
type: object
required:
- metadata
- spec
type: object
served: true
storage: true
status:
acceptedNames:
kind: ""
plural: ""
conditions: []
storedVersions: []apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
name: traefik-ingress-controller
rules:
- apiGroups:
- ""
resources:
- services
- endpoints
- secrets
verbs:
- get
- list
- watch
- apiGroups:
- extensions
- networking.k8s.io
resources:
- ingresses
- ingressclasses
verbs:
- get
- list
- watch
- apiGroups:
- extensions
resources:
- ingresses/status
verbs:
- update
- apiGroups:
- traefik.containo.us
resources:
- middlewares
- middlewaretcps
- ingressroutes
- traefikservices
- ingressroutetcps
- ingressrouteudps
- tlsoptions
- tlsstores
- serverstransports
verbs:
- get
- list
- watch
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
name: traefik-ingress-controller
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: traefik-ingress-controller
subjects:
- kind: ServiceAccount
name: traefik-ingress-controller
namespace: defaultResource Configuration¶
When using KubernetesCRD as a provider, Traefik uses Custom Resource Definition to retrieve its routing configuration. Traefik Custom Resource Definitions are a Kubernetes implementation of the Traefik concepts. The main particularities are:
- The usage of
nameandnamespaceto refer to another Kubernetes resource. - The usage of secret for sensitive data (TLS certificates and credentials).
- The structure of the configuration.
- The requirement to declare all the definitions.
The Traefik CRDs are building blocks that you can assemble according to your needs. See the list of CRDs in the dedicated routing section.
LetsEncrypt Support with the Custom Resource Definition Provider¶
By design, Traefik is a stateless application, meaning that it only derives its configuration from the environment it runs in, without additional configuration. For this reason, users can run multiple instances of Traefik at the same time to achieve HA, as is a common pattern in the kubernetes ecosystem.
When using a single instance of Traefik with Let's Encrypt, you should encounter no issues. However, this could be a single point of failure. Unfortunately, it is not possible to run multiple instances of Traefik Proxy 2.0 with Let's Encrypt enabled, because there is no way to ensure that the correct instance of Traefik will receive the challenge request and subsequent responses. Previous versions of Traefik used a KV store to attempt to achieve this, but due to sub-optimal performance that feature was dropped in 2.0.
If you need Let's Encrypt with HA in a Kubernetes environment, we recommend using Traefik Enterprise, which includes distributed Let's Encrypt as a supported feature.
If you want to keep using Traefik Proxy, high availability for Let's Encrypt can be achieved by using a Certificate Controller such as Cert-Manager. When using Cert-Manager to manage certificates, it creates secrets in your namespaces that can be referenced as TLS secrets in your ingress objects. When using the Traefik Kubernetes CRD Provider, unfortunately Cert-Manager cannot yet interface directly with the CRDs. A workaround is to enable the Kubernetes Ingress provider to allow Cert-Manager to create ingress objects to complete the challenges. Please note that this still requires manual intervention to create the certificates through Cert-Manager, but once the certificates are created, Cert-Manager keeps them renewed.
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:
kubernetesCRD:
endpoint: "http://localhost:8080"
# ...[providers.kubernetesCRD]
endpoint = "http://localhost:8080"
# ...--providers.kubernetescrd.endpoint=http://localhost:8080token¶
Optional, Default=""
Bearer token used for the Kubernetes client configuration.
providers:
kubernetesCRD:
token: "mytoken"
# ...[providers.kubernetesCRD]
token = "mytoken"
# ...--providers.kubernetescrd.token=mytokencertAuthFilePath¶
Optional, Default=""
Path to the certificate authority file. Used for the Kubernetes client configuration.
providers:
kubernetesCRD:
certAuthFilePath: "/my/ca.crt"
# ...[providers.kubernetesCRD]
certAuthFilePath = "/my/ca.crt"
# ...--providers.kubernetescrd.certauthfilepath=/my/ca.crtnamespaces¶
Optional, Default: []
Array of namespaces to watch.
If left empty, watches all namespaces if the value of namespaces.
providers:
kubernetesCRD:
namespaces:
- "default"
- "production"
# ...[providers.kubernetesCRD]
namespaces = ["default", "production"]
# ...--providers.kubernetescrd.namespaces=default,productionlabelselector¶
Optional, Default: ""
A label selector can be defined to filter on specific resource objects only,
this applies only to Traefik Custom Resources
and has no effect on Kubernetes Secrets, Endpoints and Services.
If left empty, Traefik processes all resource objects in the configured namespaces.
See label-selectors for details.
Warning
Because the label selector is applied to all Traefik Custom Resources, they all must match the filter.
providers:
kubernetesCRD:
labelSelector: "app=traefik"
# ...[providers.kubernetesCRD]
labelSelector = "app=traefik"
# ...--providers.kubernetescrd.labelselector="app=traefik"ingressClass¶
Optional, Default: ""
Value of kubernetes.io/ingress.class annotation that identifies resource objects to be processed.
If the parameter is set, only resources containing an annotation with the same value are processed.
Otherwise, resources missing the annotation, having an empty value, or the value traefik are processed.
providers:
kubernetesCRD:
ingressClass: "traefik-internal"
# ...[providers.kubernetesCRD]
ingressClass = "traefik-internal"
# ...--providers.kubernetescrd.ingressclass=traefik-internalthrottleDuration¶
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:
kubernetesCRD:
throttleDuration: "10s"
# ...[providers.kubernetesCRD]
throttleDuration = "10s"
# ...--providers.kubernetescrd.throttleDuration=10sallowCrossNamespace¶
Optional, Default: false
If the parameter is set to true, IngressRoutes are able to reference resources in other namespaces than theirs.
providers:
kubernetesCRD:
allowCrossNamespace: true
# ...[providers.kubernetesCRD]
allowCrossNamespace = true
# ...--providers.kubernetescrd.allowCrossNamespace=trueallowExternalNameServices¶
Optional, Default: false
If the parameter is set to true, IngressRoutes are able to reference ExternalName services.
providers:
kubernetesCRD:
allowExternalNameServices: true
# ...[providers.kubernetesCRD]
allowExternalNameServices = true
# ...--providers.kubernetescrd.allowexternalnameservices=trueFull Example¶
For additional information, refer to the full example with Let's Encrypt.