626 lines
19 KiB
Markdown
626 lines
19 KiB
Markdown
---
|
|
title: "Traefik Docker Routing Documentation"
|
|
description: "This guide will teach you how to attach labels to your containers, to route traffic and load balance with Traefik and Docker."
|
|
---
|
|
|
|
# Traefik & Docker
|
|
|
|
A Story of Labels & Containers
|
|
{: .subtitle }
|
|
|
|
|
|
|
|
Attach labels to your containers and let Traefik do the rest!
|
|
|
|
## Configuration Examples
|
|
|
|
??? example "Configuring Docker & Deploying / Exposing Services"
|
|
|
|
Enabling the docker provider
|
|
|
|
```yaml tab="File (YAML)"
|
|
providers:
|
|
docker: {}
|
|
```
|
|
|
|
```toml tab="File (TOML)"
|
|
[providers.docker]
|
|
```
|
|
|
|
```bash tab="CLI"
|
|
--providers.docker=true
|
|
```
|
|
|
|
Attaching labels to containers (in your docker compose file)
|
|
|
|
```yaml
|
|
version: "3"
|
|
services:
|
|
my-container:
|
|
# ...
|
|
labels:
|
|
- traefik.http.routers.my-container.rule=Host(`example.com`)
|
|
```
|
|
|
|
??? example "Specify a Custom Port for the Container"
|
|
|
|
Forward requests for `http://example.com` to `http://<private IP of container>:12345`:
|
|
|
|
```yaml
|
|
version: "3"
|
|
services:
|
|
my-container:
|
|
# ...
|
|
labels:
|
|
- traefik.http.routers.my-container.rule=Host(`example.com`)
|
|
# Tell Traefik to use the port 12345 to connect to `my-container`
|
|
- traefik.http.services.my-service.loadbalancer.server.port=12345
|
|
```
|
|
|
|
!!! important "Traefik Connecting to the Wrong Port: `HTTP/502 Gateway Error`"
|
|
By default, Traefik uses the first exposed port of a container.
|
|
|
|
Setting the label `traefik.http.services.xxx.loadbalancer.server.port`
|
|
overrides that behavior.
|
|
|
|
??? example "Specifying more than one router and service per container"
|
|
|
|
Forwarding requests to more than one port on a container requires referencing the service loadbalancer port definition using the service parameter on the router.
|
|
|
|
In this example, requests are forwarded for `http://example-a.com` to `http://<private IP of container>:8000` in addition to `http://example-b.com` forwarding to `http://<private IP of container>:9000`:
|
|
|
|
```yaml
|
|
version: "3"
|
|
services:
|
|
my-container:
|
|
# ...
|
|
labels:
|
|
- traefik.http.routers.www-router.rule=Host(`example-a.com`)
|
|
- traefik.http.routers.www-router.service=www-service
|
|
- traefik.http.services.www-service.loadbalancer.server.port=8000
|
|
- traefik.http.routers.admin-router.rule=Host(`example-b.com`)
|
|
- traefik.http.routers.admin-router.service=admin-service
|
|
- traefik.http.services.admin-service.loadbalancer.server.port=9000
|
|
```
|
|
|
|
## Routing Configuration
|
|
|
|
!!! info "Labels"
|
|
|
|
- Labels are case insensitive.
|
|
- The complete list of labels can be found in [the reference page](../../reference/dynamic-configuration/docker.md).
|
|
|
|
### General
|
|
|
|
Traefik creates, for each container, a corresponding [service](../services/index.md) and [router](../routers/index.md).
|
|
|
|
The Service automatically gets a server per instance of the container,
|
|
and the router automatically gets a rule defined by `defaultRule` (if no rule for it was defined in labels).
|
|
|
|
#### Service definition
|
|
|
|
--8<-- "content/routing/providers/service-by-label.md"
|
|
|
|
??? example "Automatic service assignment with labels"
|
|
|
|
With labels in a compose file
|
|
|
|
```yaml
|
|
labels:
|
|
- "traefik.http.routers.myproxy.rule=Host(`example.net`)"
|
|
# service myservice gets automatically assigned to router myproxy
|
|
- "traefik.http.services.myservice.loadbalancer.server.port=80"
|
|
```
|
|
|
|
??? example "Automatic service creation and assignment with labels"
|
|
|
|
With labels in a compose file
|
|
|
|
```yaml
|
|
labels:
|
|
# no service specified or defined and yet one gets automatically created
|
|
# and assigned to router myproxy.
|
|
- "traefik.http.routers.myproxy.rule=Host(`example.net`)"
|
|
```
|
|
|
|
### Routers
|
|
|
|
To update the configuration of the Router automatically attached to the container,
|
|
add labels starting with `traefik.http.routers.<name-of-your-choice>.` and followed by the option you want to change.
|
|
|
|
For example, to change the rule, you could add the label ```traefik.http.routers.my-container.rule=Host(`example.com`)```.
|
|
|
|
!!! warning "The character `@` is not authorized in the router name `<router_name>`."
|
|
|
|
??? info "`traefik.http.routers.<router_name>.rule`"
|
|
|
|
See [rule](../routers/index.md#rule) for more information.
|
|
|
|
```yaml
|
|
- "traefik.http.routers.myrouter.rule=Host(`example.com`)"
|
|
```
|
|
|
|
??? info "`traefik.http.routers.<router_name>.entrypoints`"
|
|
|
|
See [entry points](../routers/index.md#entrypoints) for more information.
|
|
|
|
```yaml
|
|
- "traefik.http.routers.myrouter.entrypoints=ep1,ep2"
|
|
```
|
|
|
|
??? info "`traefik.http.routers.<router_name>.middlewares`"
|
|
|
|
See [middlewares](../routers/index.md#middlewares) and [middlewares overview](../../middlewares/overview.md) for more information.
|
|
|
|
```yaml
|
|
- "traefik.http.routers.myrouter.middlewares=auth,prefix,cb"
|
|
```
|
|
|
|
??? info "`traefik.http.routers.<router_name>.service`"
|
|
|
|
See [service](../routers/index.md#service) for more information.
|
|
|
|
```yaml
|
|
- "traefik.http.routers.myrouter.service=myservice"
|
|
```
|
|
|
|
??? info "`traefik.http.routers.<router_name>.tls`"
|
|
|
|
See [tls](../routers/index.md#tls) for more information.
|
|
|
|
```yaml
|
|
- "traefik.http.routers.myrouter.tls=true"
|
|
```
|
|
|
|
??? info "`traefik.http.routers.<router_name>.tls.certresolver`"
|
|
|
|
See [certResolver](../routers/index.md#certresolver) for more information.
|
|
|
|
```yaml
|
|
- "traefik.http.routers.myrouter.tls.certresolver=myresolver"
|
|
```
|
|
|
|
??? info "`traefik.http.routers.<router_name>.tls.domains[n].main`"
|
|
|
|
See [domains](../routers/index.md#domains) for more information.
|
|
|
|
```yaml
|
|
- "traefik.http.routers.myrouter.tls.domains[0].main=example.org"
|
|
```
|
|
|
|
??? info "`traefik.http.routers.<router_name>.tls.domains[n].sans`"
|
|
|
|
See [domains](../routers/index.md#domains) for more information.
|
|
|
|
```yaml
|
|
- "traefik.http.routers.myrouter.tls.domains[0].sans=test.example.org,dev.example.org"
|
|
```
|
|
|
|
??? info "`traefik.http.routers.<router_name>.tls.options`"
|
|
|
|
See [options](../routers/index.md#options) for more information.
|
|
|
|
```yaml
|
|
- "traefik.http.routers.myrouter.tls.options=foobar"
|
|
```
|
|
|
|
??? info "`traefik.http.routers.<router_name>.priority`"
|
|
|
|
See [priority](../routers/index.md#priority) for more information.
|
|
|
|
```yaml
|
|
- "traefik.http.routers.myrouter.priority=42"
|
|
```
|
|
|
|
### Services
|
|
|
|
To update the configuration of the Service automatically attached to the container,
|
|
add labels starting with `traefik.http.services.<name-of-your-choice>.`, followed by the option you want to change.
|
|
|
|
For example, to change the `passHostHeader` behavior,
|
|
you'd add the label `traefik.http.services.<name-of-your-choice>.loadbalancer.passhostheader=false`.
|
|
|
|
!!! warning "The character `@` is not authorized in the service name `<service_name>`."
|
|
|
|
??? info "`traefik.http.services.<service_name>.loadbalancer.server.port`"
|
|
|
|
Registers a port.
|
|
Useful when the container exposes multiples ports.
|
|
|
|
```yaml
|
|
- "traefik.http.services.myservice.loadbalancer.server.port=8080"
|
|
```
|
|
|
|
??? info "`traefik.http.services.<service_name>.loadbalancer.server.scheme`"
|
|
|
|
Overrides the default scheme.
|
|
|
|
```yaml
|
|
- "traefik.http.services.myservice.loadbalancer.server.scheme=http"
|
|
```
|
|
|
|
??? info "`traefik.http.services.<service_name>.loadbalancer.serverstransport`"
|
|
|
|
Allows to reference a ServersTransport resource that is defined either with the File provider or the Kubernetes CRD one.
|
|
See [serverstransport](../services/index.md#serverstransport) for more information.
|
|
|
|
```yaml
|
|
- "traefik.http.services.<service_name>.loadbalancer.serverstransport=foobar@file"
|
|
```
|
|
|
|
??? info "`traefik.http.services.<service_name>.loadbalancer.passhostheader`"
|
|
|
|
See [pass Host header](../services/index.md#pass-host-header) for more information.
|
|
|
|
```yaml
|
|
- "traefik.http.services.myservice.loadbalancer.passhostheader=true"
|
|
```
|
|
|
|
??? info "`traefik.http.services.<service_name>.loadbalancer.healthcheck.headers.<header_name>`"
|
|
|
|
See [health check](../services/index.md#health-check) for more information.
|
|
|
|
```yaml
|
|
- "traefik.http.services.myservice.loadbalancer.healthcheck.headers.X-Foo=foobar"
|
|
```
|
|
|
|
??? info "`traefik.http.services.<service_name>.loadbalancer.healthcheck.hostname`"
|
|
|
|
See [health check](../services/index.md#health-check) for more information.
|
|
|
|
```yaml
|
|
- "traefik.http.services.myservice.loadbalancer.healthcheck.hostname=example.org"
|
|
```
|
|
|
|
??? info "`traefik.http.services.<service_name>.loadbalancer.healthcheck.interval`"
|
|
|
|
See [health check](../services/index.md#health-check) for more information.
|
|
|
|
```yaml
|
|
- "traefik.http.services.myservice.loadbalancer.healthcheck.interval=10s"
|
|
```
|
|
|
|
??? info "`traefik.http.services.<service_name>.loadbalancer.healthcheck.path`"
|
|
|
|
See [health check](../services/index.md#health-check) for more information.
|
|
|
|
```yaml
|
|
- "traefik.http.services.myservice.loadbalancer.healthcheck.path=/foo"
|
|
```
|
|
|
|
??? info "`traefik.http.services.<service_name>.loadbalancer.healthcheck.method`"
|
|
|
|
See [health check](../services/index.md#health-check) for more information.
|
|
|
|
```yaml
|
|
- "traefik.http.services.myservice.loadbalancer.healthcheck.method=foobar"
|
|
```
|
|
|
|
??? info "`traefik.http.services.<service_name>.loadbalancer.healthcheck.status`"
|
|
|
|
See [health check](../services/index.md#health-check) for more information.
|
|
|
|
```yaml
|
|
- "traefik.http.services.myservice.loadbalancer.healthcheck.status=42"
|
|
```
|
|
|
|
??? info "`traefik.http.services.<service_name>.loadbalancer.healthcheck.port`"
|
|
|
|
See [health check](../services/index.md#health-check) for more information.
|
|
|
|
```yaml
|
|
- "traefik.http.services.myservice.loadbalancer.healthcheck.port=42"
|
|
```
|
|
|
|
??? info "`traefik.http.services.<service_name>.loadbalancer.healthcheck.scheme`"
|
|
|
|
See [health check](../services/index.md#health-check) for more information.
|
|
|
|
```yaml
|
|
- "traefik.http.services.myservice.loadbalancer.healthcheck.scheme=http"
|
|
```
|
|
|
|
??? info "`traefik.http.services.<service_name>.loadbalancer.healthcheck.timeout`"
|
|
|
|
See [health check](../services/index.md#health-check) for more information.
|
|
|
|
```yaml
|
|
- "traefik.http.services.myservice.loadbalancer.healthcheck.timeout=10s"
|
|
```
|
|
|
|
??? info "`traefik.http.services.<service_name>.loadbalancer.healthcheck.followredirects`"
|
|
|
|
See [health check](../services/index.md#health-check) for more information.
|
|
|
|
```yaml
|
|
- "traefik.http.services.myservice.loadbalancer.healthcheck.followredirects=true"
|
|
```
|
|
|
|
??? info "`traefik.http.services.<service_name>.loadbalancer.sticky.cookie`"
|
|
|
|
See [sticky sessions](../services/index.md#sticky-sessions) for more information.
|
|
|
|
```yaml
|
|
- "traefik.http.services.myservice.loadbalancer.sticky.cookie=true"
|
|
```
|
|
|
|
??? info "`traefik.http.services.<service_name>.loadbalancer.sticky.cookie.httponly`"
|
|
|
|
See [sticky sessions](../services/index.md#sticky-sessions) for more information.
|
|
|
|
```yaml
|
|
- "traefik.http.services.myservice.loadbalancer.sticky.cookie.httponly=true"
|
|
```
|
|
|
|
??? info "`traefik.http.services.<service_name>.loadbalancer.sticky.cookie.name`"
|
|
|
|
See [sticky sessions](../services/index.md#sticky-sessions) for more information.
|
|
|
|
```yaml
|
|
- "traefik.http.services.myservice.loadbalancer.sticky.cookie.name=foobar"
|
|
```
|
|
|
|
??? info "`traefik.http.services.<service_name>.loadbalancer.sticky.cookie.secure`"
|
|
|
|
See [sticky sessions](../services/index.md#sticky-sessions) for more information.
|
|
|
|
```yaml
|
|
- "traefik.http.services.myservice.loadbalancer.sticky.cookie.secure=true"
|
|
```
|
|
|
|
??? info "`traefik.http.services.<service_name>.loadbalancer.sticky.cookie.samesite`"
|
|
|
|
See [sticky sessions](../services/index.md#sticky-sessions) for more information.
|
|
|
|
```yaml
|
|
- "traefik.http.services.myservice.loadbalancer.sticky.cookie.samesite=none"
|
|
```
|
|
|
|
??? info "`traefik.http.services.<service_name>.loadbalancer.responseforwarding.flushinterval`"
|
|
|
|
See [response forwarding](../services/index.md#response-forwarding) for more information.
|
|
|
|
```yaml
|
|
- "traefik.http.services.myservice.loadbalancer.responseforwarding.flushinterval=10"
|
|
```
|
|
|
|
### Middleware
|
|
|
|
You can declare pieces of middleware using labels starting with `traefik.http.middlewares.<name-of-your-choice>.`,
|
|
followed by the middleware type/options.
|
|
|
|
For example, to declare a middleware [`redirectscheme`](../../middlewares/http/redirectscheme.md) named `my-redirect`,
|
|
you'd write `traefik.http.middlewares.my-redirect.redirectscheme.scheme=https`.
|
|
|
|
More information about available middlewares in the dedicated [middlewares section](../../middlewares/overview.md).
|
|
|
|
!!! warning "The character `@` is not authorized in the middleware name."
|
|
|
|
??? example "Declaring and Referencing a Middleware"
|
|
|
|
```yaml
|
|
services:
|
|
my-container:
|
|
# ...
|
|
labels:
|
|
# Declaring a middleware
|
|
- traefik.http.middlewares.my-redirect.redirectscheme.scheme=https
|
|
# Referencing a middleware
|
|
- traefik.http.routers.my-container.middlewares=my-redirect
|
|
```
|
|
|
|
!!! warning "Conflicts in Declaration"
|
|
|
|
If you declare multiple middleware with the same name but with different parameters, the middleware fails to be declared.
|
|
|
|
### TCP
|
|
|
|
You can declare TCP Routers and/or Services using labels.
|
|
|
|
??? example "Declaring TCP Routers and Services"
|
|
|
|
```yaml
|
|
services:
|
|
my-container:
|
|
# ...
|
|
labels:
|
|
- "traefik.tcp.routers.my-router.rule=HostSNI(`example.com`)"
|
|
- "traefik.tcp.routers.my-router.tls=true"
|
|
- "traefik.tcp.services.my-service.loadbalancer.server.port=4123"
|
|
```
|
|
|
|
!!! warning "TCP and HTTP"
|
|
|
|
If you declare a TCP Router/Service, it will prevent Traefik from automatically creating an HTTP Router/Service (like it does by default if no TCP Router/Service is defined).
|
|
You can declare both a TCP Router/Service and an HTTP Router/Service for the same container (but you have to do so manually).
|
|
|
|
#### TCP Routers
|
|
|
|
??? info "`traefik.tcp.routers.<router_name>.entrypoints`"
|
|
|
|
See [entry points](../routers/index.md#entrypoints_1) for more information.
|
|
|
|
```yaml
|
|
- "traefik.tcp.routers.mytcprouter.entrypoints=ep1,ep2"
|
|
```
|
|
|
|
??? info "`traefik.tcp.routers.<router_name>.rule`"
|
|
|
|
See [rule](../routers/index.md#rule_1) for more information.
|
|
|
|
```yaml
|
|
- "traefik.tcp.routers.mytcprouter.rule=HostSNI(`example.com`)"
|
|
```
|
|
|
|
??? info "`traefik.tcp.routers.<router_name>.service`"
|
|
|
|
See [service](../routers/index.md#services) for more information.
|
|
|
|
```yaml
|
|
- "traefik.tcp.routers.mytcprouter.service=myservice"
|
|
```
|
|
|
|
??? info "`traefik.tcp.routers.<router_name>.tls`"
|
|
|
|
See [TLS](../routers/index.md#tls_1) for more information.
|
|
|
|
```yaml
|
|
- "traefik.tcp.routers.mytcprouter.tls=true"
|
|
```
|
|
|
|
??? info "`traefik.tcp.routers.<router_name>.tls.certresolver`"
|
|
|
|
See [certResolver](../routers/index.md#certresolver_1) for more information.
|
|
|
|
```yaml
|
|
- "traefik.tcp.routers.mytcprouter.tls.certresolver=myresolver"
|
|
```
|
|
|
|
??? info "`traefik.tcp.routers.<router_name>.tls.domains[n].main`"
|
|
|
|
See [domains](../routers/index.md#domains_1) for more information.
|
|
|
|
```yaml
|
|
- "traefik.tcp.routers.mytcprouter.tls.domains[0].main=example.org"
|
|
```
|
|
|
|
??? info "`traefik.tcp.routers.<router_name>.tls.domains[n].sans`"
|
|
|
|
See [domains](../routers/index.md#domains_1) for more information.
|
|
|
|
```yaml
|
|
- "traefik.tcp.routers.mytcprouter.tls.domains[0].sans=test.example.org,dev.example.org"
|
|
```
|
|
|
|
??? info "`traefik.tcp.routers.<router_name>.tls.options`"
|
|
|
|
See [options](../routers/index.md#options_1) for more information.
|
|
|
|
```yaml
|
|
- "traefik.tcp.routers.mytcprouter.tls.options=mysoptions"
|
|
```
|
|
|
|
??? info "`traefik.tcp.routers.<router_name>.tls.passthrough`"
|
|
|
|
See [TLS](../routers/index.md#tls_1) for more information.
|
|
|
|
```yaml
|
|
- "traefik.tcp.routers.mytcprouter.tls.passthrough=true"
|
|
```
|
|
|
|
??? info "`traefik.tcp.routers.<router_name>.priority`"
|
|
|
|
See [priority](../routers/index.md#priority_1) for more information.
|
|
|
|
```yaml
|
|
- "traefik.tcp.routers.myrouter.priority=42"
|
|
```
|
|
|
|
#### TCP Services
|
|
|
|
??? info "`traefik.tcp.services.<service_name>.loadbalancer.server.port`"
|
|
|
|
Registers a port of the application.
|
|
|
|
```yaml
|
|
- "traefik.tcp.services.mytcpservice.loadbalancer.server.port=423"
|
|
```
|
|
|
|
??? info "`traefik.tcp.services.<service_name>.loadbalancer.server.tls`"
|
|
|
|
Determines whether to use TLS when dialing with the backend.
|
|
|
|
```yaml
|
|
- "traefik.tcp.services.mytcpservice.loadbalancer.server.tls=true"
|
|
```
|
|
|
|
??? info "`traefik.tcp.services.<service_name>.loadbalancer.proxyprotocol.version`"
|
|
|
|
See [PROXY protocol](../services/index.md#proxy-protocol) for more information.
|
|
|
|
```yaml
|
|
- "traefik.tcp.services.mytcpservice.loadbalancer.proxyprotocol.version=1"
|
|
```
|
|
|
|
??? info "`traefik.tcp.services.<service_name>.loadbalancer.serverstransport`"
|
|
|
|
Allows to reference a ServersTransport resource that is defined either with the File provider or the Kubernetes CRD one.
|
|
See [serverstransport](../services/index.md#serverstransport_2) for more information.
|
|
|
|
```yaml
|
|
- "traefik.tcp.services.<service_name>.loadbalancer.serverstransport=foobar@file"
|
|
```
|
|
|
|
### UDP
|
|
|
|
You can declare UDP Routers and/or Services using labels.
|
|
|
|
??? example "Declaring UDP Routers and Services"
|
|
|
|
```yaml
|
|
services:
|
|
my-container:
|
|
# ...
|
|
labels:
|
|
- "traefik.udp.routers.my-router.entrypoints=udp"
|
|
- "traefik.udp.services.my-service.loadbalancer.server.port=4123"
|
|
```
|
|
|
|
!!! warning "UDP and HTTP"
|
|
|
|
If you declare a UDP Router/Service, it will prevent Traefik from automatically creating an HTTP Router/Service (like it does by default if no UDP Router/Service is defined).
|
|
You can declare both a UDP Router/Service and an HTTP Router/Service for the same container (but you have to do so manually).
|
|
|
|
#### UDP Routers
|
|
|
|
??? info "`traefik.udp.routers.<router_name>.entrypoints`"
|
|
|
|
See [entry points](../routers/index.md#entrypoints_2) for more information.
|
|
|
|
```yaml
|
|
- "traefik.udp.routers.myudprouter.entrypoints=ep1,ep2"
|
|
```
|
|
|
|
??? info "`traefik.udp.routers.<router_name>.service`"
|
|
|
|
See [service](../routers/index.md#services_1) for more information.
|
|
|
|
```yaml
|
|
- "traefik.udp.routers.myudprouter.service=myservice"
|
|
```
|
|
|
|
#### UDP Services
|
|
|
|
??? info "`traefik.udp.services.<service_name>.loadbalancer.server.port`"
|
|
|
|
Registers a port of the application.
|
|
|
|
```yaml
|
|
- "traefik.udp.services.myudpservice.loadbalancer.server.port=423"
|
|
```
|
|
|
|
### Specific Provider Options
|
|
|
|
#### `traefik.enable`
|
|
|
|
```yaml
|
|
- "traefik.enable=true"
|
|
```
|
|
|
|
You can tell Traefik to consider (or not) the container by setting `traefik.enable` to true or false.
|
|
|
|
This option overrides the value of `exposedByDefault`.
|
|
|
|
#### `traefik.docker.network`
|
|
|
|
```yaml
|
|
- "traefik.docker.network=mynetwork"
|
|
```
|
|
|
|
Overrides the default docker network to use for connections to the container.
|
|
|
|
If a container is linked to several networks, be sure to set the proper network name (you can check this with `docker inspect <container_id>`),
|
|
otherwise it will randomly pick one (depending on how docker is returning them).
|
|
|
|
!!! warning
|
|
When deploying a stack from a compose file `stack`, the networks defined are prefixed with `stack`.
|