HTTP Middlewares

Controlling connections

Configuration Example

Docker

# As a Docker Label
whoami:
  #  A container that exposes an API to show its IP address
  image: traefik/whoami
  labels:
    # Create a middleware named `foo-add-prefix`
    - "traefik.http.middlewares.foo-add-prefix.addprefix.prefix=/foo"
    # Apply the middleware named `foo-add-prefix` to the router named `router1`
    - "traefik.http.routers.router1.middlewares=foo-add-prefix@docker"

Kubernetes IngressRoute

# As a Kubernetes Traefik IngressRoute
apiVersion: apiextensions.k8s.io/v1beta1
kind: CustomResourceDefinition
metadata:
  name: middlewares.traefik.containo.us
spec:
  group: traefik.containo.us
  version: v1alpha1
  names:
    kind: Middleware
    plural: middlewares
    singular: middleware
  scope: Namespaced

---
apiVersion: traefik.containo.us/v1alpha1
kind: Middleware
metadata:
  name: stripprefix
spec:
  stripPrefix:
    prefixes:
      - /stripit

---
apiVersion: traefik.containo.us/v1alpha1
kind: IngressRoute
metadata:
  name: ingressroute
spec:
# more fields...
  routes:
    # more fields...
    middlewares:
      - name: stripprefix

Consul Catalog

# Create a middleware named `foo-add-prefix`
- "traefik.http.middlewares.foo-add-prefix.addprefix.prefix=/foo"
# Apply the middleware named `foo-add-prefix` to the router named `router1`
- "traefik.http.routers.router1.middlewares=foo-add-prefix@consulcatalog"

Marathon

"labels": {
  "traefik.http.middlewares.foo-add-prefix.addprefix.prefix": "/foo",
  "traefik.http.routers.router1.middlewares": "foo-add-prefix@marathon"
}

Rancher

# As a Rancher Label
labels:
  # Create a middleware named `foo-add-prefix`
  - "traefik.http.middlewares.foo-add-prefix.addprefix.prefix=/foo"
  # Apply the middleware named `foo-add-prefix` to the router named `router1`
  - "traefik.http.routers.router1.middlewares=foo-add-prefix@rancher"

File (TOML)

# As TOML Configuration File
[http.routers]
  [http.routers.router1]
    service = "service1"
    middlewares = ["foo-add-prefix"]
    rule = "Host(`example.com`)"

[http.middlewares]
  [http.middlewares.foo-add-prefix.addPrefix]
    prefix = "/foo"

[http.services]
  [http.services.service1]
    [http.services.service1.loadBalancer]

      [[http.services.service1.loadBalancer.servers]]
        url = "http://127.0.0.1:80"

File (YAML)

# As YAML Configuration File
http:
  routers:
    router1:
      service: service1
      middlewares:
        - "foo-add-prefix"
      rule: "Host(`example.com`)"

  middlewares:
    foo-add-prefix:
      addPrefix:
        prefix: "/foo"

  services:
    service1:
      loadBalancer:
        servers:
          - url: "http://127.0.0.1:80"

Available HTTP Middlewares

Middleware	Purpose	Area
AddPrefix	Adds a Path Prefix	Path Modifier
BasicAuth	Adds Basic Authentication	Security, Authentication
Buffering	Buffers the request/response	Request Lifecycle
Chain	Combines multiple pieces of middleware	Misc
CircuitBreaker	Prevents calling unhealthy services	Request Lifecycle
Compress	Compresses the response	Content Modifier
ContentType	Handles Content-Type auto-detection	Misc
DigestAuth	Adds Digest Authentication	Security, Authentication
Errors	Defines custom error pages	Request Lifecycle
ForwardAuth	Delegates Authentication	Security, Authentication
Headers	Adds / Updates headers	Security
IPWhiteList	Limits the allowed client IPs	Security, Request lifecycle
InFlightReq	Limits the number of simultaneous connections	Security, Request lifecycle
PassTLSClientCert	Adds Client Certificates in a Header	Security
RateLimit	Limits the call frequency	Security, Request lifecycle
RedirectScheme	Redirects based on scheme	Request lifecycle
RedirectRegex	Redirects based on regex	Request lifecycle
ReplacePath	Changes the path of the request	Path Modifier
ReplacePathRegex	Changes the path of the request	Path Modifier
Retry	Automatically retries in case of error	Request lifecycle
StripPrefix	Changes the path of the request	Path Modifier
StripPrefixRegex	Changes the path of the request	Path Modifier