# Rancher Provider
Træfik can be configured to use Rancher as a provider.
## Global Configuration
```toml
################################################################
# Rancher Provider
################################################################
# Enable Rancher Provider.
[rancher]
# Default domain used.
# Can be overridden by setting the "traefik.domain" label on an service.
#
# Required
#
domain = "rancher.localhost"
# Enable watch Rancher changes.
#
# Optional
# Default: true
#
watch = true
# Polling interval (in seconds).
#
# Optional
# Default: 15
#
refreshSeconds = 15
# Expose Rancher services by default in Traefik.
#
# Optional
# Default: true
#
exposedByDefault = false
# Filter services with unhealthy states and inactive states.
#
# Optional
# Default: false
#
enableServiceHealthFilter = true
# Override default configuration template.
# For advanced users :)
#
# Optional
#
# filename = "rancher.tmpl"
# Override template version
# For advanced users :)
#
# Optional
# - "1": previous template version (must be used only with older custom templates, see "filename")
# - "2": current template version (must be used to force template version when "filename" is used)
#
# templateVersion = 2
```
To enable constraints see [provider-specific constraints section](/configuration/commons/#provider-specific).
## Rancher Metadata Service
```toml
# Enable Rancher metadata service provider instead of the API
# provider.
#
# Optional
# Default: false
#
[rancher.metadata]
# Poll the Rancher metadata service for changes every `rancher.refreshSeconds`.
# NOTE: this is less accurate than the default long polling technique which
# will provide near instantaneous updates to Traefik
#
# Optional
# Default: false
#
intervalPoll = true
# Prefix used for accessing the Rancher metadata service.
#
# Optional
# Default: "/latest"
#
prefix = "/2016-07-29"
```
## Rancher API
```toml
# Enable Rancher API provider.
#
# Optional
# Default: true
#
[rancher.api]
# Endpoint to use when connecting to the Rancher API.
#
# Required
endpoint = "http://rancherserver.example.com/v1"
# AccessKey to use when connecting to the Rancher API.
#
# Required
accessKey = "XXXXXXXXXXXXXXXXXXXX"
# SecretKey to use when connecting to the Rancher API.
#
# Required
secretKey = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
```
!!! note
If Traefik needs access to the Rancher API, you need to set the `endpoint`, `accesskey` and `secretkey` parameters.
To enable Traefik to fetch information about the Environment it's deployed in only, you need to create an `Environment API Key`.
This can be found within the API Key advanced options.
Add these labels to traefik docker deployment to autogenerated these values:
```
io.rancher.container.agent.role: environment
io.rancher.container.create_agent: true
```
## Labels: overriding default behavior
### On Containers
Labels can be used on task containers to override default behavior:
| Label | Description |
|------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| `traefik.domain` | Sets the default domain for the frontend rules. |
| `traefik.enable=false` | Disables this container in Træfik. |
| `traefik.port=80` | Registers this port. Useful when the container exposes multiple ports. |
| `traefik.protocol=https` | Overrides the default `http` protocol. |
| `traefik.weight=10` | Assigns this weight to the container. |
| `traefik.backend=foo` | Gives the name `foo` to the generated backend for this container. |
| `traefik.backend.buffering.maxRequestBodyBytes=0` | See [buffering](/configuration/commons/#buffering) section. |
| `traefik.backend.buffering.maxResponseBodyBytes=0` | See [buffering](/configuration/commons/#buffering) section. |
| `traefik.backend.buffering.memRequestBodyBytes=0` | See [buffering](/configuration/commons/#buffering) section. |
| `traefik.backend.buffering.memResponseBodyBytes=0` | See [buffering](/configuration/commons/#buffering) section. |
| `traefik.backend.buffering.retryExpression=EXPR` | See [buffering](/configuration/commons/#buffering) section. |
| `traefik.backend.circuitbreaker.expression=EXPR` | Creates a [circuit breaker](/basics/#backends) to be used against the backend |
| `traefik.backend.healthcheck.path=/health` | Enables health check for the backend, hitting the container at `path`. |
| `traefik.backend.healthcheck.interval=1s` | Defines the health check interval. |
| `traefik.backend.healthcheck.port=8080` | Sets a different port for the health check. |
| `traefik.backend.healthcheck.scheme=http` | Overrides the server URL scheme. |
| `traefik.backend.healthcheck.hostname=foobar.com` | Defines the health check hostname. |
| `traefik.backend.healthcheck.headers=EXPR` | Defines the health check request headers
Format: HEADER:value||HEADER2:value2 |
| `traefik.backend.loadbalancer.method=drr` | Overrides the default `wrr` load balancer algorithm |
| `traefik.backend.loadbalancer.stickiness=true` | Enables backend sticky sessions |
| `traefik.backend.loadbalancer.stickiness.cookieName=NAME` | Sets the cookie name manually for sticky sessions |
| `traefik.backend.loadbalancer.sticky=true` | Enables backend sticky sessions (DEPRECATED) |
| `traefik.backend.maxconn.amount=10` | Sets a maximum number of connections to the backend.
Must be used in conjunction with the below label to take effect. |
| `traefik.backend.maxconn.extractorfunc=client.ip` | Sets the function to be used against the request to determine what to limit maximum connections to the backend by.
Must be used in conjunction with the above label to take effect. |
| `traefik.frontend.auth.basic=EXPR` | Sets the basic authentication to this frontend in CSV format: `User:Hash,User:Hash` (DEPRECATED). |
| `traefik.frontend.auth.basic.removeHeader=true` | If set to `true`, removes the `Authorization` header. |
| `traefik.frontend.auth.basic.users=EXPR` | Sets the basic authentication to this frontend in CSV format: `User:Hash,User:Hash` . |
| `traefik.frontend.auth.basic.usersfile=/path/.htpasswd` | Sets the basic authentication with an external file; if users and usersFile are provided, both are merged, with external file contents having precedence. |
| `traefik.frontend.auth.digest.removeHeader=true` | If set to `true`, removes the `Authorization` header. |
| `traefik.frontend.auth.digest.users=EXPR` | Sets the digest authentication to this frontend in CSV format: `User:Realm:Hash,User:Realm:Hash`. |
| `traefik.frontend.auth.digest.usersfile=/path/.htdigest` | Sets the digest authentication with an external file; if users and usersFile are provided, both are merged, with external file contents having precedence. |
| `traefik.frontend.auth.forward.address=https://example.com`| Sets the URL of the authentication server. |
| `traefik.frontend.auth.forward.tls.ca=/path/ca.pem` | Sets the Certificate Authority (CA) for the TLS connection with the authentication server. |
| `traefik.frontend.auth.forward.tls.caOptional=true` | Checks the certificates if present but do not force to be signed by a specified Certificate Authority (CA). |
| `traefik.frontend.auth.forward.tls.cert=/path/server.pem` | Sets the Certificate for the TLS connection with the authentication server. |
| `traefik.frontend.auth.forward.tls.insecureSkipVerify=true`| If set to true invalid SSL certificates are accepted. |
| `traefik.frontend.auth.forward.tls.key=/path/server.key` | Sets the Certificate for the TLS connection with the authentication server. |
| `traefik.frontend.auth.forward.trustForwardHeader=true` | Trusts X-Forwarded-* headers. |
| `traefik.frontend.auth.headerField=X-WebAuth-User` | Sets the header used to pass the authenticated user to the application. |
| `traefik.frontend.entryPoints=http,https` | Assigns this frontend to entry points `http` and `https`.
Overrides `defaultEntryPoints` |
| `traefik.frontend.errors..backend=NAME` | See [custom error pages](/configuration/commons/#custom-error-pages) section. |
| `traefik.frontend.errors..query=PATH` | See [custom error pages](/configuration/commons/#custom-error-pages) section. |
| `traefik.frontend.errors..status=RANGE` | See [custom error pages](/configuration/commons/#custom-error-pages) section. |
| `traefik.frontend.passHostHeader=true` | Forwards client `Host` header to the backend. |
| `traefik.frontend.passTLSCert=true` | Forwards TLS Client certificates to the backend. |
| `traefik.frontend.priority=10` | Overrides default frontend priority |
| `traefik.frontend.rateLimit.extractorFunc=EXP` | See [rate limiting](/configuration/commons/#rate-limiting) section. |
| `traefik.frontend.rateLimit.rateSet..period=6` | See [rate limiting](/configuration/commons/#rate-limiting) section. |
| `traefik.frontend.rateLimit.rateSet..average=6` | See [rate limiting](/configuration/commons/#rate-limiting) section. |
| `traefik.frontend.rateLimit.rateSet..burst=6` | See [rate limiting](/configuration/commons/#rate-limiting) section. |
| `traefik.frontend.redirect.entryPoint=https` | Enables Redirect to another entryPoint to this frontend (e.g. HTTPS) |
| `traefik.frontend.redirect.regex=^http://localhost/(.*)` | Redirects to another URL to this frontend.
Must be set with `traefik.frontend.redirect.replacement`. |
| `traefik.frontend.redirect.replacement=http://mydomain/$1` | Redirects to another URL to this frontend.
Must be set with `traefik.frontend.redirect.regex`. |
| `traefik.frontend.redirect.permanent=true` | Returns 301 instead of 302. |
| `traefik.frontend.rule=EXPR` | Overrides the default frontend rule. Default: `Host:{containerName}.{domain}` or `Host:{service}.{project_name}.{domain}` if you are using `docker-compose`. |
| `traefik.frontend.whiteList.sourceRange=RANGE` | Sets a list of IP-Ranges which are allowed to access.
An unset or empty list allows all Source-IPs to access.
If one of the Net-Specifications are invalid, the whole list is invalid and allows all Source-IPs to access. |
| `traefik.frontend.whiteList.useXForwardedFor=true` | Uses `X-Forwarded-For` header as valid source of IP for the white list. |
#### Custom Headers
| Label | Description |
|-------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| `traefik.frontend.headers.customRequestHeaders=EXPR ` | Provides the container with custom request headers that will be appended to each request forwarded to the container.
Format: HEADER:value||HEADER2:value2 |
| `traefik.frontend.headers.customResponseHeaders=EXPR` | Appends the headers to each response returned by the container, before forwarding the response to the client.
Format: HEADER:value||HEADER2:value2 |
#### Security Headers
| Label | Description |
|----------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| `traefik.frontend.headers.allowedHosts=EXPR` | Provides a list of allowed hosts that requests will be processed.
Format: `Host1,Host2` |
| `traefik.frontend.headers.browserXSSFilter=true` | Adds the X-XSS-Protection header with the value `1; mode=block`. |
| `traefik.frontend.headers.contentSecurityPolicy=VALUE` | Adds CSP Header with the custom value. |
| `traefik.frontend.headers.contentTypeNosniff=true` | Adds the `X-Content-Type-Options` header with the value `nosniff`. |
| `traefik.frontend.headers.customBrowserXSSValue=VALUE` | Set custom value for X-XSS-Protection header. This overrides the BrowserXssFilter option. |
| `traefik.frontend.headers.customFrameOptionsValue=VALUE` | Overrides the `X-Frame-Options` header with the custom value. |
| `traefik.frontend.headers.forceSTSHeader=false` | Adds the STS header to non-SSL requests. |
| `traefik.frontend.headers.frameDeny=false` | Adds the `X-Frame-Options` header with the value of `DENY`. |
| `traefik.frontend.headers.hostsProxyHeaders=EXPR ` | Provides a list of headers that the proxied hostname may be stored.
Format: `HEADER1,HEADER2` |
| `traefik.frontend.headers.isDevelopment=false` | This will cause the `AllowedHosts`, `SSLRedirect`, and `STSSeconds`/`STSIncludeSubdomains` options to be ignored during development.
When deploying to production, be sure to set this to false. |
| `traefik.frontend.headers.publicKey=VALUE` | Adds pinned HTST public key header. |
| `traefik.frontend.headers.referrerPolicy=VALUE` | Adds referrer policy header. |
| `traefik.frontend.headers.SSLRedirect=true` | Forces the frontend to redirect to SSL if a non-SSL request is sent. |
| `traefik.frontend.headers.SSLTemporaryRedirect=true` | Forces the frontend to redirect to SSL if a non-SSL request is sent, but by sending a 302 instead of a 301. |
| `traefik.frontend.headers.SSLHost=HOST` | This setting configures the hostname that redirects will be based on. Default is "", which is the same host as the request. |
| `traefik.frontend.headers.SSLForceHost=true` | If `SSLForceHost` is `true` and `SSLHost` is set, requests will be forced to use `SSLHost` even the ones that are already using SSL. Default is false. |
| `traefik.frontend.headers.SSLProxyHeaders=EXPR` | Header combinations that would signify a proper SSL Request (Such as `X-Forwarded-For:https`).
Format: HEADER:value||HEADER2:value2 |
| `traefik.frontend.headers.STSSeconds=315360000` | Sets the max-age of the STS header. |
| `traefik.frontend.headers.STSIncludeSubdomains=true` | Adds the `IncludeSubdomains` section of the STS header. |
| `traefik.frontend.headers.STSPreload=true` | Adds the preload flag to the STS header. |
### On containers with Multiple Ports (segment labels)
Segment labels are used to define routes to a container exposing multiple ports.
A segment is a group of labels that apply to a port exposed by a container.
You can define as many segments as ports exposed in a container.
Segment labels override the default behavior.
| Label | Description |
|---------------------------------------------------------------------------|---------------------------------------------------------------|
| `traefik..backend=BACKEND` | Same as `traefik.backend` |
| `traefik..domain=DOMAIN` | Same as `traefik.domain` |
| `traefik..port=PORT` | Same as `traefik.port` |
| `traefik..protocol=http` | Same as `traefik.protocol` |
| `traefik..weight=10` | Same as `traefik.weight` |
| `traefik..frontend.auth.basic=EXPR` | Same as `traefik.frontend.auth.basic` |
| `traefik..frontend.auth.basic.removeHeader=true` | Same as `traefik.frontend.auth.basic.removeHeader` |
| `traefik..frontend.auth.basic.users=EXPR` | Same as `traefik.frontend.auth.basic.users` |
| `traefik..frontend.auth.basic.usersfile=/path/.htpasswd` | Same as `traefik.frontend.auth.basic.usersfile` |
| `traefik..frontend.auth.digest.removeHeader=true` | Same as `traefik.frontend.auth.digest.removeHeader` |
| `traefik..frontend.auth.digest.users=EXPR` | Same as `traefik.frontend.auth.digest.users` |
| `traefik..frontend.auth.digest.usersfile=/path/.htdigest` | Same as `traefik.frontend.auth.digest.usersfile` |
| `traefik..frontend.auth.forward.address=https://example.com`| Same as `traefik.frontend.auth.forward.address` |
| `traefik..frontend.auth.forward.tls.ca=/path/ca.pem` | Same as `traefik.frontend.auth.forward.tls.ca` |
| `traefik..frontend.auth.forward.tls.caOptional=true` | Same as `traefik.frontend.auth.forward.tls.caOptional` |
| `traefik..frontend.auth.forward.tls.cert=/path/server.pem` | Same as `traefik.frontend.auth.forward.tls.cert` |
| `traefik..frontend.auth.forward.tls.insecureSkipVerify=true`| Same as `traefik.frontend.auth.forward.tls.insecureSkipVerify`|
| `traefik..frontend.auth.forward.tls.key=/path/server.key` | Same as `traefik.frontend.auth.forward.tls.key` |
| `traefik..frontend.auth.forward.trustForwardHeader=true` | Same as `traefik.frontend.auth.forward.trustForwardHeader` |
| `traefik..frontend.auth.headerField=X-WebAuth-User` | Same as `traefik.frontend.auth.headerField` |
| `traefik..frontend.entryPoints=https` | Same as `traefik.frontend.entryPoints` |
| `traefik..frontend.errors..backend=NAME` | Same as `traefik.frontend.errors..backend` |
| `traefik..frontend.errors..query=PATH` | Same as `traefik.frontend.errors..query` |
| `traefik..frontend.errors..status=RANGE` | Same as `traefik.frontend.errors..status` |
| `traefik..frontend.passHostHeader=true` | Same as `traefik.frontend.passHostHeader` |
| `traefik..frontend.passTLSCert=true` | Same as `traefik.frontend.passTLSCert` |
| `traefik..frontend.priority=10` | Same as `traefik.frontend.priority` |
| `traefik..frontend.rateLimit.extractorFunc=EXP` | Same as `traefik.frontend.rateLimit.extractorFunc` |
| `traefik..frontend.rateLimit.rateSet..period=6` | Same as `traefik.frontend.rateLimit.rateSet..period` |
| `traefik..frontend.rateLimit.rateSet..average=6` | Same as `traefik.frontend.rateLimit.rateSet..average` |
| `traefik..frontend.rateLimit.rateSet..burst=6` | Same as `traefik.frontend.rateLimit.rateSet..burst` |
| `traefik..frontend.redirect.entryPoint=https` | Same as `traefik.frontend.redirect.entryPoint` |
| `traefik..frontend.redirect.regex=^http://localhost/(.*)` | Same as `traefik.frontend.redirect.regex` |
| `traefik..frontend.redirect.replacement=http://mydomain/$1` | Same as `traefik.frontend.redirect.replacement` |
| `traefik..frontend.redirect.permanent=true` | Same as `traefik.frontend.redirect.permanent` |
| `traefik..frontend.rule=EXP` | Same as `traefik.frontend.rule` |
| `traefik..frontend.whiteList.sourceRange=RANGE` | Same as `traefik.frontend.whiteList.sourceRange` |
| `traefik..frontend.whiteList.useXForwardedFor=true` | Same as `traefik.frontend.whiteList.useXForwardedFor` |
#### Custom Headers
| Label | Description |
|----------------------------------------------------------------------|------------------------------------------------------------|
| `traefik..frontend.headers.customRequestHeaders=EXPR ` | overrides `traefik.frontend.headers.customRequestHeaders` |
| `traefik..frontend.headers.customResponseHeaders=EXPR` | overrides `traefik.frontend.headers.customResponseHeaders` |
#### Security Headers
| Label | Description |
|-------------------------------------------------------------------------|--------------------------------------------------------------|
| `traefik..frontend.headers.allowedHosts=EXPR` | overrides `traefik.frontend.headers.allowedHosts` |
| `traefik..frontend.headers.browserXSSFilter=true` | overrides `traefik.frontend.headers.browserXSSFilter` |
| `traefik..frontend.headers.contentSecurityPolicy=VALUE` | overrides `traefik.frontend.headers.contentSecurityPolicy` |
| `traefik..frontend.headers.contentTypeNosniff=true` | overrides `traefik.frontend.headers.contentTypeNosniff` |
| `traefik..frontend.headers.customBrowserXSSValue=VALUE` | overrides `traefik.frontend.headers.customBrowserXSSValue` |
| `traefik..frontend.headers.customFrameOptionsValue=VALUE` | overrides `traefik.frontend.headers.customFrameOptionsValue` |
| `traefik..frontend.headers.forceSTSHeader=false` | overrides `traefik.frontend.headers.forceSTSHeader` |
| `traefik..frontend.headers.frameDeny=false` | overrides `traefik.frontend.headers.frameDeny` |
| `traefik..frontend.headers.hostsProxyHeaders=EXPR` | overrides `traefik.frontend.headers.hostsProxyHeaders` |
| `traefik..frontend.headers.isDevelopment=false` | overrides `traefik.frontend.headers.isDevelopment` |
| `traefik..frontend.headers.publicKey=VALUE` | overrides `traefik.frontend.headers.publicKey` |
| `traefik..frontend.headers.referrerPolicy=VALUE` | overrides `traefik.frontend.headers.referrerPolicy` |
| `traefik..frontend.headers.SSLRedirect=true` | overrides `traefik.frontend.headers.SSLRedirect` |
| `traefik..frontend.headers.SSLTemporaryRedirect=true` | overrides `traefik.frontend.headers.SSLTemporaryRedirect` |
| `traefik..frontend.headers.SSLHost=HOST` | overrides `traefik.frontend.headers.SSLHost` |
| `traefik..frontend.headers.SSLForceHost=true` | overrides `traefik.frontend.headers.SSLForceHost` |
| `traefik..frontend.headers.SSLProxyHeaders=EXPR` | overrides `traefik.frontend.headers.SSLProxyHeaders` |
| `traefik..frontend.headers.STSSeconds=315360000` | overrides `traefik.frontend.headers.STSSeconds` |
| `traefik..frontend.headers.STSIncludeSubdomains=true` | overrides `traefik.frontend.headers.STSIncludeSubdomains` |
| `traefik..frontend.headers.STSPreload=true` | overrides `traefik.frontend.headers.STSPreload` |