451 lines
14 KiB
Markdown
451 lines
14 KiB
Markdown
# Traefik & Consul Catalog
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A Story of Tags, Services & Instances
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{: .subtitle }
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Attach tags to your services and let Traefik do the rest!
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## Routing Configuration
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!!! info "tags"
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- tags are case insensitive.
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- The complete list of tags can be found [the reference page](../../reference/dynamic-configuration/consul-catalog.md)
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### General
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Traefik creates, for each consul Catalog service, a corresponding [service](../services/index.md) and [router](../routers/index.md).
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The Service automatically gets a server per instance in this consul Catalog service, and the router gets a default rule attached to it, based on the service name.
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### Routers
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To update the configuration of the Router automatically attached to the service, add tags starting with `traefik.routers.{name-of-your-choice}.` and followed by the option you want to change.
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For example, to change the rule, you could add the tag ```traefik.http.routers.my-service.rule=Host(`example.com`)```.
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??? info "`traefik.http.routers.<router_name>.rule`"
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See [rule](../routers/index.md#rule) for more information.
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```yaml
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traefik.http.routers.myrouter.rule=Host(`example.com`)
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```
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??? info "`traefik.http.routers.<router_name>.entrypoints`"
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See [entry points](../routers/index.md#entrypoints) for more information.
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```yaml
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traefik.http.routers.myrouter.entrypoints=web,websecure
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```
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??? info "`traefik.http.routers.<router_name>.middlewares`"
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See [middlewares](../routers/index.md#middlewares) and [middlewares overview](../../middlewares/overview.md) for more information.
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```yaml
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traefik.http.routers.myrouter.middlewares=auth,prefix,cb
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```
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??? info "`traefik.http.routers.<router_name>.service`"
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See [rule](../routers/index.md#service) for more information.
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```yaml
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traefik.http.routers.myrouter.service=myservice
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```
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??? info "`traefik.http.routers.<router_name>.tls`"
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See [tls](../routers/index.md#tls) for more information.
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```yaml
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traefik.http.routers.myrouter>.tls=true
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```
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??? info "`traefik.http.routers.<router_name>.tls.certresolver`"
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See [certResolver](../routers/index.md#certresolver) for more information.
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```yaml
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traefik.http.routers.myrouter.tls.certresolver=myresolver
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```
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??? info "`traefik.http.routers.<router_name>.tls.domains[n].main`"
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See [domains](../routers/index.md#domains) for more information.
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```yaml
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traefik.http.routers.myrouter.tls.domains[0].main=example.org
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```
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??? info "`traefik.http.routers.<router_name>.tls.domains[n].sans`"
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See [domains](../routers/index.md#domains) for more information.
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```yaml
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traefik.http.routers.myrouter.tls.domains[0].sans=test.example.org,dev.example.org
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```
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??? info "`traefik.http.routers.<router_name>.tls.options`"
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See [options](../routers/index.md#options) for more information.
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```yaml
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traefik.http.routers.myrouter.tls.options=foobar
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```
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??? info "`traefik.http.routers.<router_name>.priority`"
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<!-- TODO doc priority in routers page -->
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```yaml
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traefik.http.routers.myrouter.priority=42
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```
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### Services
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To update the configuration of the Service automatically attached to the service,
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add tags starting with `traefik.http.services.{name-of-your-choice}.`, followed by the option you want to change.
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For example, to change the `passHostHeader` behavior,
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you'd add the tag `traefik.http.services.{name-of-your-choice}.loadbalancer.passhostheader=false`.
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??? info "`traefik.http.services.<service_name>.loadbalancer.server.port`"
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Registers a port.
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Useful when the service exposes multiples ports.
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```yaml
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traefik.http.services.myservice.loadbalancer.server.port=8080
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```
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??? info "`traefik.http.services.<service_name>.loadbalancer.server.scheme`"
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Overrides the default scheme.
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```yaml
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traefik.http.services.myservice.loadbalancer.server.scheme=http
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```
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??? info "`traefik.http.services.<service_name>.loadbalancer.passhostheader`"
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<!-- TODO doc passHostHeader in services page -->
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```yaml
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traefik.http.services.myservice.loadbalancer.passhostheader=true
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```
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??? info "`traefik.http.services.<service_name>.loadbalancer.healthcheck.headers.<header_name>`"
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See [health check](../services/index.md#health-check) for more information.
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```yaml
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traefik.http.services.myservice.loadbalancer.healthcheck.headers.X-Foo=foobar
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```
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??? info "`traefik.http.services.<service_name>.loadbalancer.healthcheck.hostname`"
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See [health check](../services/index.md#health-check) for more information.
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```yaml
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traefik.http.services.myservice.loadbalancer.healthcheck.hostname=example.org
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```
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??? info "`traefik.http.services.<service_name>.loadbalancer.healthcheck.interval`"
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See [health check](../services/index.md#health-check) for more information.
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```yaml
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traefik.http.services.myservice.loadbalancer.healthcheck.interval=10
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```
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??? info "`traefik.http.services.<service_name>.loadbalancer.healthcheck.path`"
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See [health check](../services/index.md#health-check) for more information.
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```yaml
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traefik.http.services.myservice.loadbalancer.healthcheck.path=/foo
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```
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??? info "`traefik.http.services.<service_name>.loadbalancer.healthcheck.port`"
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See [health check](../services/index.md#health-check) for more information.
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```yaml
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traefik.http.services.myservice.loadbalancer.healthcheck.port=42
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```
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??? info "`traefik.http.services.<service_name>.loadbalancer.healthcheck.scheme`"
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See [health check](../services/index.md#health-check) for more information.
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```yaml
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traefik.http.services.myservice.loadbalancer.healthcheck.scheme=http
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```
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??? info "`traefik.http.services.<service_name>.loadbalancer.healthcheck.timeout`"
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See [health check](../services/index.md#health-check) for more information.
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```yaml
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traefik.http.services.myservice.loadbalancer.healthcheck.timeout=10
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```
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??? info "`traefik.http.services.<service_name>.loadbalancer.healthcheck.followredirects`"
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See [health check](../services/index.md#health-check) for more information.
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```yaml
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traefik.http.services.myservice.loadbalancer.healthcheck.followredirects=true
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```
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??? info "`traefik.http.services.<service_name>.loadbalancer.sticky`"
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See [sticky sessions](../services/index.md#sticky-sessions) for more information.
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```yaml
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traefik.http.services.myservice.loadbalancer.sticky=true
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```
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??? info "`traefik.http.services.<service_name>.loadbalancer.sticky.cookie.httponly`"
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See [sticky sessions](../services/index.md#sticky-sessions) for more information.
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```yaml
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traefik.http.services.myservice.loadbalancer.sticky.cookie.httponly=true
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```
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??? info "`traefik.http.services.<service_name>.loadbalancer.sticky.cookie.name`"
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See [sticky sessions](../services/index.md#sticky-sessions) for more information.
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```yaml
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traefik.http.services.myservice.loadbalancer.sticky.cookie.name=foobar
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```
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??? info "`traefik.http.services.<service_name>.loadbalancer.sticky.cookie.secure`"
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See [sticky sessions](../services/index.md#sticky-sessions) for more information.
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```yaml
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traefik.http.services.myservice.loadbalancer.sticky.cookie.secure=true
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```
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??? info "`traefik.http.services.<service_name>.loadbalancer.sticky.cookie.samesite`"
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See [sticky sessions](../services/index.md#sticky-sessions) for more information.
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```yaml
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traefik.http.services.myservice.loadbalancer.sticky.cookie.samesite=none
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```
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??? info "`traefik.http.services.<service_name>.loadbalancer.responseforwarding.flushinterval`"
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<!-- TODO doc responseforwarding in services page -->
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FlushInterval specifies the flush interval to flush to the client while copying the response body.
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```yaml
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traefik.http.services.myservice.loadbalancer.responseforwarding.flushinterval=10
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```
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### Middleware
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You can declare pieces of middleware using tags starting with `traefik.http.middlewares.{name-of-your-choice}.`, followed by the middleware type/options.
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For example, to declare a middleware [`redirectscheme`](../../middlewares/redirectscheme.md) named `my-redirect`, you'd write `traefik.http.middlewares.my-redirect.redirectscheme.scheme: https`.
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More information about available middlewares in the dedicated [middlewares section](../../middlewares/overview.md).
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??? example "Declaring and Referencing a Middleware"
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```yaml
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# ...
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# Declaring a middleware
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traefik.http.middlewares.my-redirect.redirectscheme.scheme=https
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# Referencing a middleware
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traefik.http.routers.my-service.middlewares=my-redirect
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```
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!!! warning "Conflicts in Declaration"
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If you declare multiple middleware with the same name but with different parameters, the middleware fails to be declared.
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### TCP
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You can declare TCP Routers and/or Services using tags.
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??? example "Declaring TCP Routers and Services"
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```yaml
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traefik.tcp.routers.my-router.rule=HostSNI(`example.com`)
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traefik.tcp.routers.my-router.tls=true
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traefik.tcp.services.my-service.loadbalancer.server.port=4123
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```
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!!! warning "TCP and HTTP"
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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).
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You can declare both a TCP Router/Service and an HTTP Router/Service for the same consul service (but you have to do so manually).
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#### TCP Routers
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??? info "`traefik.tcp.routers.<router_name>.entrypoints`"
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See [entry points](../routers/index.md#entrypoints_1) for more information.
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```yaml
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traefik.tcp.routers.mytcprouter.entrypoints=ep1,ep2
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```
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??? info "`traefik.tcp.routers.<router_name>.rule`"
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See [rule](../routers/index.md#rule_1) for more information.
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```yaml
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traefik.tcp.routers.mytcprouter.rule=HostSNI(`example.com`)
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```
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??? info "`traefik.tcp.routers.<router_name>.service`"
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See [service](../routers/index.md#services) for more information.
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```yaml
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traefik.tcp.routers.mytcprouter.service=myservice
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```
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??? info "`traefik.tcp.routers.<router_name>.tls`"
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See [TLS](../routers/index.md#tls_1) for more information.
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```yaml
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traefik.tcp.routers.mytcprouter.tls=true
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```
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??? info "`traefik.tcp.routers.<router_name>.tls.certresolver`"
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See [certResolver](../routers/index.md#certresolver_1) for more information.
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```yaml
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traefik.tcp.routers.mytcprouter.tls.certresolver=myresolver
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```
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??? info "`traefik.tcp.routers.<router_name>.tls.domains[n].main`"
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See [domains](../routers/index.md#domains_1) for more information.
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```yaml
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traefik.tcp.routers.mytcprouter.tls.domains[0].main=example.org
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```
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??? info "`traefik.tcp.routers.<router_name>.tls.domains[n].sans`"
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See [domains](../routers/index.md#domains_1) for more information.
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```yaml
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traefik.tcp.routers.mytcprouter.tls.domains[0].sans=test.example.org,dev.example.org
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```
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??? info "`traefik.tcp.routers.<router_name>.tls.options`"
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See [options](../routers/index.md#options_1) for more information.
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```yaml
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traefik.tcp.routers.mytcprouter.tls.options=mysoptions
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```
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??? info "`traefik.tcp.routers.<router_name>.tls.passthrough`"
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See [TLS](../routers/index.md#tls_1) for more information.
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```yaml
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traefik.tcp.routers.mytcprouter.tls.passthrough=true
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```
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#### TCP Services
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??? info "`traefik.tcp.services.<service_name>.loadbalancer.server.port`"
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Registers a port of the application.
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```yaml
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traefik.tcp.services.mytcpservice.loadbalancer.server.port=423
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```
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??? info "`traefik.tcp.services.<service_name>.loadbalancer.terminationdelay`"
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See [termination delay](../services/index.md#termination-delay) for more information.
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```yaml
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traefik.tcp.services.mytcpservice.loadbalancer.terminationdelay=100
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```
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??? info "`traefik.tcp.services.<service_name>.loadbalancer.proxyprotocol.version`"
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See [PROXY protocol](../services/index.md#proxy-protocol) for more information.
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```yaml
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traefik.tcp.services.mytcpservice.loadbalancer.proxyprotocol.version=1
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```
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### UDP
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You can declare UDP Routers and/or Services using tags.
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??? example "Declaring UDP Routers and Services"
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```yaml
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traefik.udp.routers.my-router.entrypoints=udp
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traefik.udp.services.my-service.loadbalancer.server.port=4123
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```
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!!! warning "UDP and HTTP"
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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).
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You can declare both a UDP Router/Service and an HTTP Router/Service for the same consul service (but you have to do so manually).
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#### UDP Routers
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??? info "`traefik.udp.routers.<router_name>.entrypoints`"
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See [entry points](../routers/index.md#entrypoints_2) for more information.
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```yaml
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traefik.udp.routers.myudprouter.entrypoints=ep1,ep2
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```
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??? info "`traefik.udp.routers.<router_name>.service`"
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See [service](../routers/index.md#services_1) for more information.
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```yaml
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traefik.udp.routers.myudprouter.service=myservice
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```
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#### UDP Services
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??? info "`traefik.udp.services.<service_name>.loadbalancer.server.port`"
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Registers a port of the application.
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```yaml
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traefik.udp.services.myudpservice.loadbalancer.server.port=423
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```
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### Specific Provider Options
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#### `traefik.enable`
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```yaml
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traefik.enable=true
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```
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You can tell Traefik to consider (or not) the service by setting `traefik.enable` to true or false.
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This option overrides the value of `exposedByDefault`.
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#### Port Lookup
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Traefik is capable of detecting the port to use, by following the default consul Catalog flow.
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That means, if you just expose lets say port `:1337` on the consul Catalog ui, traefik will pick up this port and use it.
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