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Docker Provider

Traefik can be configured to use Docker as a provider.

Docker

################################################################
# Docker Provider
################################################################

# Enable Docker Provider.
[docker]

# Docker server endpoint. Can be a tcp or a unix socket endpoint.
#
# Required
#
endpoint = "unix:///var/run/docker.sock"

# Default base domain used for the frontend rules.
# Can be overridden by setting the "traefik.domain" label on a container.
#
# Optional
#
domain = "docker.localhost"

# Enable watch docker changes.
#
# Optional
#
watch = true

# Override default configuration template.
# For advanced users :)
#
# Optional
#
# filename = "docker.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 containers by default in Traefik.
# If set to false, containers that don't have `traefik.enable=true` will be ignored.
#
# Optional
# Default: true
#
exposedByDefault = true

# Use the IP address from the binded port instead of the inner network one.
#
# In case no IP address is attached to the binded port (or in case 
# there is no bind), the inner network one will be used as a fallback.     
#
# Optional
# Default: false
#
usebindportip = true

# Use Swarm Mode services as data provider.
#
# Optional
# Default: false
#
swarmMode = false

# Polling interval (in seconds) for Swarm Mode.
#
# Optional
# Default: 15
#
swarmModeRefreshSeconds = 15

# Define a default docker network to use for connections to all containers.
# Can be overridden by the traefik.docker.network label.
#
# Optional
#
network = "web"

# Enable docker TLS connection.
#
# Optional
#
#  [docker.tls]
#  ca = "/etc/ssl/ca.crt"
#  cert = "/etc/ssl/docker.crt"
#  key = "/etc/ssl/docker.key"
#  insecureSkipVerify = true

To enable constraints see provider-specific constraints section.

Docker Swarm Mode

################################################################
# Docker Swarm Mode Provider
################################################################

# Enable Docker Provider.
[docker]

# Docker server endpoint.
# Can be a tcp or a unix socket endpoint.
#
# Required
# Default: "unix:///var/run/docker.sock"
#
# swarm classic (1.12-)
# endpoint = "tcp://127.0.0.1:2375"
# docker swarm mode (1.12+)
endpoint = "tcp://127.0.0.1:2377"

# Default base domain used for the frontend rules.
# Can be overridden by setting the "traefik.domain" label on a services.
#
# Optional
# Default: ""
#
domain = "docker.localhost"

# Enable watch docker changes.
#
# Optional
# Default: true
#
watch = true

# Use Docker Swarm Mode as data provider.
#
# Optional
# Default: false
#
swarmMode = true

# Define a default docker network to use for connections to all containers.
# Can be overridden by the traefik.docker.network label.
#
# Optional
#
network = "web"

# Override default configuration template.
# For advanced users :)
#
# Optional
#
# filename = "docker.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 services by default in Traefik.
#
# Optional
# Default: true
#
exposedByDefault = false

# Enable docker TLS connection.
#
# Optional
#
#  [docker.tls]
#  ca = "/etc/ssl/ca.crt"
#  cert = "/etc/ssl/docker.crt"
#  key = "/etc/ssl/docker.key"
#  insecureSkipVerify = true

To enable constraints see provider-specific constraints section.

Security Considerations

Security Challenge with the Docker Socket

Traefik requires access to the docker socket to get its dynamic configuration, by watching the Docker API through this socket.

Important

Depending on your context and your usage, accessing the Docker API without any restriction might be a security concern.

As explained on the Docker documentation: (Docker Daemon Attack Surface page):

[...] only **trusted** users should be allowed to control your Docker daemon [...]

If the Traefik processes (handling requests from the outside world) is attacked, then the attacker can access the Docker (or Swarm Mode) backend.

Also, when using Swarm Mode, it is mandatory to schedule Traefik's containers on the Swarm manager nodes, to let Traefik accessing the Docker Socket of the Swarm manager node.

More information about Docker's security:

Security Compensation

The main security compensation is to expose the Docker socket over TCP, instead of the default Unix socket file. It allows different implementation levels of the AAA (Authentication, Authorization, Accounting) concepts, depending on your security assessment:

  • Authentication with Client Certificates as described in the "Protect the Docker daemon socket" page of Docker's documentation

  • Authorization with the Docker Authorization Plugin Mechanism

  • Accounting at networking level, by exposing the socket only inside a Docker private network, only available for Traefik.

  • Accounting at container level, by exposing the socket on a another container than Traefik's. With Swarm mode, it allows scheduling of Traefik on worker nodes, with only the "socket exposer" container on the manager nodes.

  • Accounting at kernel level, by enforcing kernel calls with mechanisms like SELinux, to only allows an identified set of actions for Traefik's process (or the "socket exposer" process).

Use the following ressources to get started:

Labels: overriding default behavior

Using Docker with Swarm Mode

If you use a compose file with the Swarm mode, labels should be defined in the deploy part of your service. This behavior is only enabled for docker-compose version 3+ (Compose file reference).

version: "3"
services:
  whoami:
    deploy:
      labels:
        traefik.docker.network: traefik

Using Docker Compose

If you are intending to use only Docker Compose commands (e.g. docker-compose up --scale whoami=2 -d), labels should be under your service, otherwise they will be ignored.

version: "3"
services:
  whoami:
    labels:
      traefik.docker.network: traefik

On Containers

Labels can be used on containers to override default behavior.

Label Description
traefik.docker.network Overrides the default docker network to use for connections to the container. [1]
traefik.domain Sets the default base domain for the frontend rules. For more information, check the Container Labels section's of the user guide "Let's Encrypt & Docker"
traefik.enable=false Disables this container in Traefik.
traefik.port=80 Registers this port. Useful when the container exposes multiples ports.
traefik.tags=foo,bar,myTag Adds Traefik tags to the Docker container/service to be used in constraints.
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 section.
traefik.backend.buffering.maxResponseBodyBytes=0 See buffering section.
traefik.backend.buffering.memRequestBodyBytes=0 See buffering section.
traefik.backend.buffering.memResponseBodyBytes=0 See buffering section.
traefik.backend.buffering.retryExpression=EXPR See buffering section.
traefik.backend.circuitbreaker.expression=EXPR Creates a circuit breaker to be used against the backend
traefik.backend.responseForwarding.flushInterval=10ms Defines the interval between two flushes when forwarding response from backend to client.
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.loadbalancer.swarm=true Uses Swarm's inbuilt load balancer (only relevant under Swarm Mode) [3].
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 [2] (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 [2].
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.authResponseHeaders=EXPR Sets the forward authentication authResponseHeaders in CSV format: X-Auth-User,X-Auth-Header
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 user 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.<name>.backend=NAME See custom error pages section.
traefik.frontend.errors.<name>.query=PATH See custom error pages section.
traefik.frontend.errors.<name>.status=RANGE See custom error pages section.
traefik.frontend.passHostHeader=true Forwards client Host header to the backend.
traefik.frontend.passTLSClientCert.infos.notAfter=true Add the noAfter field in a escaped client infos in the X-Forwarded-Ssl-Client-Cert-Infos header.
traefik.frontend.passTLSClientCert.infos.notBefore=true Add the noBefore field in a escaped client infos in the X-Forwarded-Ssl-Client-Cert-Infos header.
traefik.frontend.passTLSClientCert.infos.sans=true Add the sans field in a escaped client infos in the X-Forwarded-Ssl-Client-Cert-Infos header.
traefik.frontend.passTLSClientCert.infos.subject.commonName=true Add the subject.commonName field in a escaped client infos in the X-Forwarded-Ssl-Client-Cert-Infos header.
traefik.frontend.passTLSClientCert.infos.subject.country=true Add the subject.country field in a escaped client infos in the X-Forwarded-Ssl-Client-Cert-Infos header.
traefik.frontend.passTLSClientCert.infos.subject.locality=true Add the subject.locality field in a escaped client infos in the X-Forwarded-Ssl-Client-Cert-Infos header.
traefik.frontend.passTLSClientCert.infos.subject.organization=true Add the subject.organization field in a escaped client infos in the X-Forwarded-Ssl-Client-Cert-Infos header.
traefik.frontend.passTLSClientCert.infos.subject.province=true Add the subject.province field in a escaped client infos in the X-Forwarded-Ssl-Client-Cert-Infos header.
traefik.frontend.passTLSClientCert.infos.subject.serialNumber=true Add the subject.serialNumber field in a escaped client infos in the X-Forwarded-Ssl-Client-Cert-Infos header.
traefik.frontend.passTLSClientCert.pem=true Pass the escaped pem in the X-Forwarded-Ssl-Client-Cert header.
traefik.frontend.passTLSCert=true Forwards TLS Client certificates to the backend (DEPRECATED).
traefik.frontend.priority=10 Overrides default frontend priority
traefik.frontend.rateLimit.extractorFunc=EXP See rate limiting section.
traefik.frontend.rateLimit.rateSet.<name>.period=6 See rate limiting section.
traefik.frontend.rateLimit.rateSet.<name>.average=6 See rate limiting section.
traefik.frontend.rateLimit.rateSet.<name>.burst=6 See 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.

[1] traefik.docker.network:
If a container is linked to several networks, be sure to set the proper network name (you can check with docker inspect <container_id>) otherwise it will randomly pick one (depending on how docker is returning them).
For instance when deploying docker stack from compose files, the compose defined networks will be prefixed with the stack name. Or if your service references external network use it's name instead.

[2] traefik.frontend.auth.basic.users=EXPR:
To create user:password pair, it's possible to use this command:
echo $(htpasswd -nb user password) | sed -e s/\\$/\\$\\$/g.
The result will be user:$$apr1$$9Cv/OMGj$$ZomWQzuQbL.3TRCS81A1g/, note additional symbol $ makes escaping.

[3] traefik.backend.loadbalancer.swarm:
If you enable this option, Traefik will use the virtual IP provided by docker swarm instead of the containers IPs. Which means that Traefik will not perform any kind of load balancing and will delegate this task to swarm.
It also means that Traefik will manipulate only one backend, not one backend per container.

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 HPKP 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.<segment_name>.backend=BACKEND Same as traefik.backend
traefik.<segment_name>.domain=DOMAIN Same as traefik.domain
traefik.<segment_name>.port=PORT Same as traefik.port
traefik.<segment_name>.protocol=http Same as traefik.protocol
traefik.<segment_name>.weight=10 Same as traefik.weight
traefik.<segment_name>.frontend.auth.basic=EXPR Same as traefik.frontend.auth.basic
traefik.<segment_name>.frontend.auth.basic.removeHeader=true Same as traefik.frontend.auth.basic.removeHeader
traefik.<segment_name>.frontend.auth.basic.users=EXPR Same as traefik.frontend.auth.basic.users
traefik.<segment_name>.frontend.auth.basic.usersFile=/path/.htpasswd Same as traefik.frontend.auth.basic.usersFile
traefik.<segment_name>.frontend.auth.digest.removeHeader=true Same as traefik.frontend.auth.digest.removeHeader
traefik.<segment_name>.frontend.auth.digest.users=EXPR Same as traefik.frontend.auth.digest.users
traefik.<segment_name>.frontend.auth.digest.usersFile=/path/.htdigest Same as traefik.frontend.auth.digest.usersFile
traefik.<segment_name>.frontend.auth.forward.address=https://example.com Same as traefik.frontend.auth.forward.address
traefik.<segment_name>.frontend.auth.forward.authResponseHeaders=EXPR Same as traefik.frontend.auth.forward.authResponseHeaders
traefik.<segment_name>.frontend.auth.forward.tls.ca=/path/ca.pem Same as traefik.frontend.auth.forward.tls.ca
traefik.<segment_name>.frontend.auth.forward.tls.caOptional=true Same as traefik.frontend.auth.forward.tls.caOptional
traefik.<segment_name>.frontend.auth.forward.tls.cert=/path/server.pem Same as traefik.frontend.auth.forward.tls.cert
traefik.<segment_name>.frontend.auth.forward.tls.insecureSkipVerify=true Same as traefik.frontend.auth.forward.tls.insecureSkipVerify
traefik.<segment_name>.frontend.auth.forward.tls.key=/path/server.key Same as traefik.frontend.auth.forward.tls.key
traefik.<segment_name>.frontend.auth.forward.trustForwardHeader=true Same as traefik.frontend.auth.forward.trustForwardHeader
traefik.<segment_name>.frontend.auth.headerField=X-WebAuth-User Same as traefik.frontend.auth.headerField
traefik.<segment_name>.frontend.entryPoints=https Same as traefik.frontend.entryPoints
traefik.<segment_name>.frontend.errors.<name>.backend=NAME Same as traefik.frontend.errors.<name>.backend
traefik.<segment_name>.frontend.errors.<name>.query=PATH Same as traefik.frontend.errors.<name>.query
traefik.<segment_name>.frontend.errors.<name>.status=RANGE Same as traefik.frontend.errors.<name>.status
traefik.<segment_name>.frontend.passHostHeader=true Same as traefik.frontend.passHostHeader
traefik.<segment_name>.frontend.passTLSClientCert.infos.notAfter=true Same as traefik.frontend.passTLSClientCert.infos.notAfter
traefik.<segment_name>.frontend.passTLSClientCert.infos.notBefore=true Same as traefik.frontend.passTLSClientCert.infos.notBefore
traefik.<segment_name>.frontend.passTLSClientCert.infos.sans=true Same as traefik.frontend.passTLSClientCert.infos.sans
traefik.<segment_name>.frontend.passTLSClientCert.infos.subject.commonName=true Same as traefik.frontend.passTLSClientCert.infos.subject.commonName
traefik.<segment_name>.frontend.passTLSClientCert.infos.subject.country=true Same as traefik.frontend.passTLSClientCert.infos.subject.country
traefik.<segment_name>.frontend.passTLSClientCert.infos.subject.locality=true Same as traefik.frontend.passTLSClientCert.infos.subject.locality
traefik.<segment_name>.frontend.passTLSClientCert.infos.subject.organization=true Same as traefik.frontend.passTLSClientCert.infos.subject.organization
traefik.<segment_name>.frontend.passTLSClientCert.infos.subject.province=true Same as traefik.frontend.passTLSClientCert.infos.subject.province
traefik.<segment_name>.frontend.passTLSClientCert.infos.subject.serialNumber=true Same as traefik.frontend.passTLSClientCert.infos.subject.serialNumber
traefik.<segment_name>.frontend.passTLSClientCert.pem=true Same as traefik.frontend.passTLSClientCert.infos.pem
traefik.<segment_name>.frontend.passTLSCert=true Same as traefik.frontend.passTLSCert
traefik.<segment_name>.frontend.priority=10 Same as traefik.frontend.priority
traefik.<segment_name>.frontend.rateLimit.extractorFunc=EXP Same as traefik.frontend.rateLimit.extractorFunc
traefik.<segment_name>.frontend.rateLimit.rateSet.<name>.period=6 Same as traefik.frontend.rateLimit.rateSet.<name>.period
traefik.<segment_name>.frontend.rateLimit.rateSet.<name>.average=6 Same as traefik.frontend.rateLimit.rateSet.<name>.average
traefik.<segment_name>.frontend.rateLimit.rateSet.<name>.burst=6 Same as traefik.frontend.rateLimit.rateSet.<name>.burst
traefik.<segment_name>.frontend.redirect.entryPoint=https Same as traefik.frontend.redirect.entryPoint
traefik.<segment_name>.frontend.redirect.regex=^http://localhost/(.*) Same as traefik.frontend.redirect.regex
traefik.<segment_name>.frontend.redirect.replacement=http://mydomain/$1 Same as traefik.frontend.redirect.replacement
traefik.<segment_name>.frontend.redirect.permanent=true Same as traefik.frontend.redirect.permanent
traefik.<segment_name>.frontend.rule=EXP Same as traefik.frontend.rule
traefik.<segment_name>.frontend.whiteList.sourceRange=RANGE Same as traefik.frontend.whiteList.sourceRange
traefik.<segment_name>.frontend.whiteList.useXForwardedFor=true Same as traefik.frontend.whiteList.useXForwardedFor

Custom Headers

Label Description
traefik.<segment_name>.frontend.headers.customRequestHeaders=EXPR Same as traefik.frontend.headers.customRequestHeaders
traefik.<segment_name>.frontend.headers.customResponseHeaders=EXPR Same as traefik.frontend.headers.customResponseHeaders

Security Headers

Label Description
traefik.<segment_name>.frontend.headers.allowedHosts=EXPR Same as traefik.frontend.headers.allowedHosts
traefik.<segment_name>.frontend.headers.browserXSSFilter=true Same as traefik.frontend.headers.browserXSSFilter
traefik.<segment_name>.frontend.headers.contentSecurityPolicy=VALUE Same as traefik.frontend.headers.contentSecurityPolicy
traefik.<segment_name>.frontend.headers.contentTypeNosniff=true Same as traefik.frontend.headers.contentTypeNosniff
traefik.<segment_name>.frontend.headers.customBrowserXSSValue=VALUE Same as traefik.frontend.headers.customBrowserXSSValue
traefik.<segment_name>.frontend.headers.customFrameOptionsValue=VALUE Same as traefik.frontend.headers.customFrameOptionsValue
traefik.<segment_name>.frontend.headers.forceSTSHeader=false Same as traefik.frontend.headers.forceSTSHeader
traefik.<segment_name>.frontend.headers.frameDeny=false Same as traefik.frontend.headers.frameDeny
traefik.<segment_name>.frontend.headers.hostsProxyHeaders=EXPR Same as traefik.frontend.headers.hostsProxyHeaders
traefik.<segment_name>.frontend.headers.isDevelopment=false Same as traefik.frontend.headers.isDevelopment
traefik.<segment_name>.frontend.headers.publicKey=VALUE Same as traefik.frontend.headers.publicKey
traefik.<segment_name>.frontend.headers.referrerPolicy=VALUE Same as traefik.frontend.headers.referrerPolicy
traefik.<segment_name>.frontend.headers.SSLRedirect=true Same as traefik.frontend.headers.SSLRedirect
traefik.<segment_name>.frontend.headers.SSLTemporaryRedirect=true Same as traefik.frontend.headers.SSLTemporaryRedirect
traefik.<segment_name>.frontend.headers.SSLHost=HOST Same as traefik.frontend.headers.SSLHost
traefik.<segment_name>.frontend.headers.SSLForceHost=true Same as traefik.frontend.headers.SSLForceHost
traefik.<segment_name>.frontend.headers.SSLProxyHeaders=EXPR Same as traefik.frontend.headers.SSLProxyHeaders=EXPR
traefik.<segment_name>.frontend.headers.STSSeconds=315360000 Same as traefik.frontend.headers.STSSeconds=315360000
traefik.<segment_name>.frontend.headers.STSIncludeSubdomains=true Same as traefik.frontend.headers.STSIncludeSubdomains=true
traefik.<segment_name>.frontend.headers.STSPreload=true Same as traefik.frontend.headers.STSPreload=true

Note

If a label is defined both as a container label and a segment label (for example traefik.<segment_name>.port=PORT and traefik.port=PORT ), the segment label is used to defined the <segment_name> property (port in the example).

It's possible to mix container labels and segment labels, in this case container labels are used as default value for missing segment labels but no frontends are going to be created with the container labels.

More details in this example.

Warning

When running inside a container, Traefik will need network access through:

docker network connect <network> <traefik-container>

usebindportip

The default behavior of Traefik is to route requests to the IP/Port of the matching container. When setting usebindportip to true, you tell Traefik to use the IP/Port attached to the container's binding instead of the inner network IP/Port.

When used in conjunction with the traefik.port label (that tells Traefik to route requests to a specific port), Traefik tries to find a binding with traefik.port port to select the container. If it can't find such a binding, Traefik falls back on the internal network IP of the container, but still uses the traefik.port that is set in the label.

Below is a recap of the behavior of usebindportip in different situations.

traefik.port label Container's binding Routes to
- - IntIP:IntPort
- ExtPort:IntPort IntIP:IntPort
- ExtIp:ExtPort:IntPort ExtIp:ExtPort
LblPort - IntIp:LblPort
LblPort ExtIp:ExtPort:LblPort ExtIp:ExtPort
LblPort ExtIp:ExtPort:OtherPort IntIp:LblPort
LblPort ExtIp1:ExtPort1:IntPort1 & ExtIp2:LblPort:IntPort2 ExtIp2:LblPort

Note

In the above table, ExtIp stands for "external IP found in the binding", IntIp stands for "internal network container's IP", ExtPort stands for "external Port found in the binding", and IntPort stands for "internal network container's port."