# Marathon Provider
Træfik can be configured to use Marathon as a provider.
See also [Marathon user guide](/user-guide/marathon).
## Configuration
```toml
################################################################
# Mesos/Marathon Provider
################################################################
# Enable Marathon Provider.
[marathon]
# Marathon server endpoint.
# You can also specify multiple endpoint for Marathon:
# endpoint = "http://10.241.1.71:8080,10.241.1.72:8080,10.241.1.73:8080"
#
# Required
# Default: "http://127.0.0.1:8080"
#
endpoint = "http://127.0.0.1:8080"
# Enable watch Marathon changes.
#
# Optional
# Default: true
#
watch = true
# Default domain used.
# Can be overridden by setting the "traefik.domain" label on an application.
#
# Required
#
domain = "marathon.localhost"
# Override default configuration template.
# For advanced users :)
#
# Optional
#
# filename = "marathon.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
# Expose Marathon apps by default in Traefik.
#
# Optional
# Default: true
#
# exposedByDefault = false
# Convert Marathon groups to subdomains.
# Default behavior: /foo/bar/myapp => foo-bar-myapp.{defaultDomain}
# with groupsAsSubDomains enabled: /foo/bar/myapp => myapp.bar.foo.{defaultDomain}
#
# Optional
# Default: false
#
# groupsAsSubDomains = true
# Enable compatibility with marathon-lb labels.
#
# Optional
# Default: false
#
# marathonLBCompatibility = true
# Enable filtering using Marathon constraints..
# If enabled, Traefik will read Marathon constraints, as defined in https://mesosphere.github.io/marathon/docs/constraints.html
# Each individual constraint will be treated as a verbatim compounded tag.
# i.e. "rack_id:CLUSTER:rack-1", with all constraint groups concatenated together using ":"
#
# Optional
# Default: false
#
# filterMarathonConstraints = true
# Enable Marathon basic authentication.
#
# Optional
#
# [marathon.basic]
# httpBasicAuthUser = "foo"
# httpBasicPassword = "bar"
# TLS client configuration. https://golang.org/pkg/crypto/tls/#Config
#
# Optional
#
# [marathon.TLS]
# CA = "/etc/ssl/ca.crt"
# Cert = "/etc/ssl/marathon.cert"
# Key = "/etc/ssl/marathon.key"
# insecureSkipVerify = true
# DCOSToken for DCOS environment.
# This will override the Authorization header.
#
# Optional
#
# dcosToken = "xxxxxx"
# Override DialerTimeout.
# Amount of time to allow the Marathon provider to wait to open a TCP connection
# to a Marathon master.
# Can be provided in a format supported by [time.ParseDuration](https://golang.org/pkg/time/#ParseDuration) or as raw
# values (digits).
# If no units are provided, the value is parsed assuming seconds.
#
# Optional
# Default: "5s"
#
# dialerTimeout = "5s"
# Override ResponseHeaderTimeout.
# Amount of time to allow the Marathon provider to wait until the first response
# header from the Marathon master is received.
# Can be provided in a format supported by [time.ParseDuration](https://golang.org/pkg/time/#ParseDuration) or as raw
# values (digits).
# If no units are provided, the value is parsed assuming seconds.
#
# Optional
# Default: "60s"
#
# responseHeaderTimeout = "60s"
# Override TLSHandshakeTimeout.
# Amount of time to allow the Marathon provider to wait until the TLS
# handshake completes.
# Can be provided in a format supported by [time.ParseDuration](https://golang.org/pkg/time/#ParseDuration) or as raw
# values (digits).
# If no units are provided, the value is parsed assuming seconds.
#
# Optional
# Default: "5s"
#
# TLSHandshakeTimeout = "5s"
# Set the TCP Keep Alive interval for the Marathon HTTP Client.
# Can be provided in a format supported by [time.ParseDuration](https://golang.org/pkg/time/#ParseDuration) or as raw
# values (digits).
# If no units are provided, the value is parsed assuming seconds.
#
# Optional
# Default: "10s"
#
# keepAlive = "10s"
# By default, a task's IP address (as returned by the Marathon API) is used as
# backend server if an IP-per-task configuration can be found; otherwise, the
# name of the host running the task is used.
# The latter behavior can be enforced by enabling this switch.
#
# Optional
# Default: false
#
# forceTaskHostname = true
# Applications may define readiness checks which are probed by Marathon during
# deployments periodically and the results exposed via the API.
# Enabling the following parameter causes Traefik to filter out tasks
# whose readiness checks have not succeeded.
# Note that the checks are only valid at deployment times.
# See the Marathon guide for details.
#
# Optional
# Default: false
#
# respectReadinessChecks = true
```
To enable constraints see [provider-specific constraints section](/configuration/commons/#provider-specific).
## Labels: overriding default behavior
Marathon labels may be used to dynamically change the routing and forwarding behavior.
They may be specified on one of two levels: Application or service.
### Application Level
The following labels can be defined on Marathon applications. They adjust the behavior for the entire application.
| Label | Description |
|------------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| `traefik.domain` | Sets the default domain used for the frontend rules. |
| `traefik.enable=false` | Disables this container in Træfik. |
| `traefik.port=80` | Registers this port. Useful when the container exposes multiples ports. |
| `traefik.portIndex=1` | Registers port by index in the application's ports array. Useful when the application 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. (Default: 30s) |
| `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.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 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 basic authentication to this frontend in CSV format: `User:Hash,User:Hash`. |
| `traefik.frontend.auth.basic.usersFile=/path/.htpasswd` | Sets 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 digest authentication to this frontend in CSV format: `User:Realm:Hash,User:Realm:Hash`. |
| `traefik.frontend.auth.digest.usersFile=/path/.htdigest` | Sets 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.auth.removeHeader=true` | If set to true, removes the Authorization header. |
| `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:{sub_domain}.{domain}`. |
| `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. |
### Applications with Multiple Ports (segment labels)
Segment labels are used to define routes to an application exposing multiple ports.
A segment is a group of labels that apply to a port exposed by an application.
You can define as many segments as ports exposed in an application.
Segment labels override the default behavior.
| Label | Description |
|---------------------------------------------------------------------------|----------------------------------------------------------------|
| `traefik..backend=BACKEND` | Same as `traefik.backend` |
| `traefik..domain=DOMAIN` | Same as `traefik.domain` |
| `traefik..portIndex=1` | Same as `traefik.portIndex` |
| `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.auth.removeHeader=true` | Same as `traefik.frontend.auth.removeHeader` |
| `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 ` | Same as `traefik.frontend.headers.customRequestHeaders` |
| `traefik..frontend.headers.customResponseHeaders=EXPR` | Same as `traefik.frontend.headers.customResponseHeaders` |
#### Security Headers
| Label | Description |
|-------------------------------------------------------------------------|--------------------------------------------------------------|
| `traefik..frontend.headers.allowedHosts=EXPR` | Same as `traefik.frontend.headers.allowedHosts` |
| `traefik..frontend.headers.browserXSSFilter=true` | Same as `traefik.frontend.headers.browserXSSFilter` |
| `traefik..frontend.headers.contentSecurityPolicy=VALUE` | Same as `traefik.frontend.headers.contentSecurityPolicy` |
| `traefik..frontend.headers.contentTypeNosniff=true` | Same as `traefik.frontend.headers.contentTypeNosniff` |
| `traefik..frontend.headers.customBrowserXSSValue=VALUE` | Same as `traefik.frontend.headers.customBrowserXSSValue` |
| `traefik..frontend.headers.customFrameOptionsValue=VALUE` | Same as `traefik.frontend.headers.customFrameOptionsValue` |
| `traefik..frontend.headers.forceSTSHeader=false` | Same as `traefik.frontend.headers.forceSTSHeader` |
| `traefik..frontend.headers.frameDeny=false` | Same as `traefik.frontend.headers.frameDeny` |
| `traefik..frontend.headers.hostsProxyHeaders=EXPR` | Same as `traefik.frontend.headers.hostsProxyHeaders` |
| `traefik..frontend.headers.isDevelopment=false` | Same as `traefik.frontend.headers.isDevelopment` |
| `traefik..frontend.headers.publicKey=VALUE` | Same as `traefik.frontend.headers.publicKey` |
| `traefik..frontend.headers.referrerPolicy=VALUE` | Same as `traefik.frontend.headers.referrerPolicy` |
| `traefik..frontend.headers.SSLRedirect=true` | Same as `traefik.frontend.headers.SSLRedirect` |
| `traefik..frontend.headers.SSLTemporaryRedirect=true` | Same as `traefik.frontend.headers.SSLTemporaryRedirect` |
| `traefik..frontend.headers.SSLHost=HOST` | Same as `traefik.frontend.headers.SSLHost` |
| `traefik..frontend.headers.SSLForceHost=true` | Same as `traefik.frontend.headers.SSLForceHost` |
| `traefik..frontend.headers.SSLProxyHeaders=EXPR` | Same as `traefik.frontend.headers.SSLProxyHeaders=EXPR` |
| `traefik..frontend.headers.STSSeconds=315360000` | Same as `traefik.frontend.headers.STSSeconds=315360000` |
| `traefik..frontend.headers.STSIncludeSubdomains=true` | Same as `traefik.frontend.headers.STSIncludeSubdomains=true` |
| `traefik..frontend.headers.STSPreload=true` | Same as `traefik.frontend.headers.STSPreload=true` |