220 lines
25 KiB
Markdown
220 lines
25 KiB
Markdown
# Consul Catalog Provider
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Træfik can be configured to use service discovery catalog of Consul as a provider.
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```toml
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################################################################
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# Consul Catalog Provider
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################################################################
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# Enable Consul Catalog Provider.
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[consulCatalog]
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# Consul server endpoint.
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#
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# Required
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# Default: "127.0.0.1:8500"
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#
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endpoint = "127.0.0.1:8500"
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# Expose Consul catalog services by default in Traefik.
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#
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# Optional
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# Default: true
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#
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exposedByDefault = false
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# Allow Consul server to serve the catalog reads regardless of whether it is the leader.
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#
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# Optional
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# Default: false
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#
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stale = false
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# Default domain used.
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#
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# Optional
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#
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domain = "consul.localhost"
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# Prefix for Consul catalog tags.
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#
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# Optional
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# Default: "traefik"
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#
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prefix = "traefik"
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# Default frontEnd Rule for Consul services.
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#
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# The format is a Go Template with:
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# - ".ServiceName", ".Domain" and ".Attributes" available
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# - "getTag(name, tags, defaultValue)", "hasTag(name, tags)" and "getAttribute(name, tags, defaultValue)" functions are available
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# - "getAttribute(...)" function uses prefixed tag names based on "prefix" value
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#
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# Optional
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# Default: "Host:{{.ServiceName}}.{{.Domain}}"
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#
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#frontEndRule = "Host:{{.ServiceName}}.{{.Domain}}"
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# Enable Consul catalog TLS connection.
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#
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# Optional
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#
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# [consulCatalog.tls]
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# ca = "/etc/ssl/ca.crt"
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# cert = "/etc/ssl/consul.crt"
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# key = "/etc/ssl/consul.key"
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# insecureSkipVerify = true
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# Override default configuration template.
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# For advanced users :)
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#
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# Optional
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#
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# filename = "consulcatalog.tmpl"
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# Override template version
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# For advanced users :)
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#
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# Optional
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# - "1": previous template version (must be used only with older custom templates, see "filename")
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# - "2": current template version (must be used to force template version when "filename" is used)
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#
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# templateVersion = 2
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```
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This provider will create routes matching on hostname based on the service name used in Consul.
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To enable constraints see [provider-specific constraints section](/configuration/commons/#provider-specific).
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## Tags
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Additional settings can be defined using Consul Catalog tags.
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!!! note
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The default prefix is `traefik`.
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| Label | Description |
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|-------------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
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| `<prefix>.enable=false` | Disables this container in Træfik. |
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| `<prefix>.protocol=https` | Overrides the default `http` protocol. |
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| `<prefix>.weight=10` | Assigns this weight to the container. |
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| `traefik.backend.buffering.maxRequestBodyBytes=0` | See [buffering](/configuration/commons/#buffering) section. |
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| `traefik.backend.buffering.maxResponseBodyBytes=0` | See [buffering](/configuration/commons/#buffering) section. |
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| `traefik.backend.buffering.memRequestBodyBytes=0` | See [buffering](/configuration/commons/#buffering) section. |
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| `traefik.backend.buffering.memResponseBodyBytes=0` | See [buffering](/configuration/commons/#buffering) section. |
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| `traefik.backend.buffering.retryExpression=EXPR` | See [buffering](/configuration/commons/#buffering) section. |
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| `<prefix>.backend.circuitbreaker.expression=EXPR` | Creates a [circuit breaker](/basics/#backends) to be used against the backend. ex: `NetworkErrorRatio() > 0.` |
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| `<prefix>.backend.healthcheck.path=/health` | Enables health check for the backend, hitting the container at `path`. |
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| `<prefix>.backend.healthcheck.interval=1s` | Defines the health check interval. |
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| `<prefix>.backend.healthcheck.port=8080` | Sets a different port for the health check. |
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| `traefik.backend.healthcheck.scheme=http` | Overrides the server URL scheme. |
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| `<prefix>.backend.healthcheck.hostname=foobar.com` | Defines the health check hostname. |
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| `<prefix>.backend.healthcheck.headers=EXPR` | Defines the health check request headers <br>Format: <code>HEADER:value||HEADER2:value2</code> |
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| `<prefix>.backend.loadbalancer.method=drr` | Overrides the default `wrr` load balancer algorithm. |
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| `<prefix>.backend.loadbalancer.stickiness=true` | Enables backend sticky sessions. |
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| `<prefix>.backend.loadbalancer.stickiness.cookieName=NAME` | Sets the cookie name manually for sticky sessions. |
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| `<prefix>.backend.loadbalancer.sticky=true` | Enables backend sticky sessions. (DEPRECATED) |
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| `<prefix>.backend.maxconn.amount=10` | Sets a maximum number of connections to the backend.<br>Must be used in conjunction with the below label to take effect. |
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| `<prefix>.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.<br>Must be used in conjunction with the above label to take effect. |
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| `<prefix>.frontend.auth.basic=EXPR` | Sets basic authentication to this frontend in CSV format: `User:Hash,User:Hash` (DEPRECATED). |
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| `<prefix>.frontend.auth.basic.removeHeader=true` | If set to `true`, removes the `Authorization` header. |
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| `<prefix>.frontend.auth.basic.users=EXPR` | Sets basic authentication to this frontend in CSV format: `User:Hash,User:Hash`. |
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| `<prefix>.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. |
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| `<prefix>.frontend.auth.digest.removeHeader=true` | If set to `true`, removes the `Authorization` header. |
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| `<prefix>.frontend.auth.digest.users=EXPR` | Sets digest authentication to this frontend in CSV format: `User:Realm:Hash,User:Realm:Hash`. |
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| `<prefix>.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. |
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| `<prefix>.frontend.auth.forward.address=https://example.com`| Sets the URL of the authentication server. |
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| `<prefix>.frontend.auth.forward.tls.ca=/path/ca.pem` | Sets the Certificate Authority (CA) for the TLS connection with the authentication server. |
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| `<prefix>.frontend.auth.forward.tls.caOptional=true` | Checks the certificates if present but do not force to be signed by a specified Certificate Authority (CA). |
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| `<prefix>.frontend.auth.forward.tls.cert=/path/server.pem` | Sets the Certificate for the TLS connection with the authentication server. |
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| `<prefix>.frontend.auth.forward.tls.insecureSkipVerify=true`| If set to true invalid SSL certificates are accepted. |
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| `<prefix>.frontend.auth.forward.tls.key=/path/server.key` | Sets the Certificate for the TLS connection with the authentication server. |
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| `<prefix>.frontend.auth.forward.trustForwardHeader=true` | Trusts X-Forwarded-* headers. |
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| `<prefix>.frontend.auth.headerField=X-WebAuth-User` | Sets the header used to pass the authenticated user to the application. |
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| `<prefix>.frontend.entryPoints=http,https` | Assigns this frontend to entry points `http` and `https`.<br>Overrides `defaultEntryPoints` |
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| `<prefix>.frontend.errors.<name>.backend=NAME` | See [custom error pages](/configuration/commons/#custom-error-pages) section. |
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| `<prefix>.frontend.errors.<name>.query=PATH` | See [custom error pages](/configuration/commons/#custom-error-pages) section. |
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| `<prefix>.frontend.errors.<name>.status=RANGE` | See [custom error pages](/configuration/commons/#custom-error-pages) section. |
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| `<prefix>.frontend.passHostHeader=true` | Forwards client `Host` header to the backend. |
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| `<prefix>.frontend.passTLSCert=true` | Forwards TLS Client certificates to the backend. |
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| `<prefix>.frontend.priority=10` | Overrides default frontend priority. |
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| `<prefix>.frontend.rateLimit.extractorFunc=EXP` | See [rate limiting](/configuration/commons/#rate-limiting) section. |
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| `<prefix>.frontend.rateLimit.rateSet.<name>.period=6` | See [rate limiting](/configuration/commons/#rate-limiting) section. |
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| `<prefix>.frontend.rateLimit.rateSet.<name>.average=6` | See [rate limiting](/configuration/commons/#rate-limiting) section. |
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| `<prefix>.frontend.rateLimit.rateSet.<name>.burst=6` | See [rate limiting](/configuration/commons/#rate-limiting) section. |
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| `<prefix>.frontend.redirect.entryPoint=https` | Enables Redirect to another entryPoint to this frontend (e.g. HTTPS). |
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| `<prefix>.frontend.redirect.regex=^http://localhost/(.*)` | Redirects to another URL to this frontend.<br>Must be set with `traefik.frontend.redirect.replacement`. |
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| `<prefix>.frontend.redirect.replacement=http://mydomain/$1` | Redirects to another URL to this frontend.<br>Must be set with `traefik.frontend.redirect.regex`. |
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| `<prefix>.frontend.redirect.permanent=true` | Returns 301 instead of 302. |
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| `<prefix>.frontend.rule=EXPR` | Overrides the default frontend rule. Default: `Host:{{.ServiceName}}.{{.Domain}}`. |
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| `<prefix>.frontend.whiteList.sourceRange=RANGE` | Sets a list of IP-Ranges which are allowed to access.<br>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. |
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| `<prefix>.frontend.whiteList.useXForwardedFor=true` | Uses `X-Forwarded-For` header as valid source of IP for the white list. |
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### Multiple frontends for a single service
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If you need to support multiple frontends for a service, for example when having multiple `rules` that can't be combined, specify them as follows:
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```
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<prefix>.frontends.A.rule=Host:A:PathPrefix:/A
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<prefix>.frontends.B.rule=Host:B:PathPrefix:/
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```
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`A` and `B` here are just arbitrary names, they can be anything. You can use any setting that applies to `<prefix>.frontend` from the table above.
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### Custom Headers
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!!! note
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The default prefix is `traefik`.
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| Label | Description |
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| `<prefix>.frontend.headers.customRequestHeaders=EXPR ` | Provides the container with custom request headers that will be appended to each request forwarded to the container.<br>Format: <code>HEADER:value||HEADER2:value2</code> |
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| `<prefix>.frontend.headers.customResponseHeaders=EXPR` | Appends the headers to each response returned by the container, before forwarding the response to the client.<br>Format: <code>HEADER:value||HEADER2:value2</code> |
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### Security Headers
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!!! note
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The default prefix is `traefik`.
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| Label | Description |
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|-----------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
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| `<prefix>.frontend.headers.allowedHosts=EXPR` | Provides a list of allowed hosts that requests will be processed.<br>Format: `Host1,Host2` |
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| `<prefix>.frontend.headers.browserXSSFilter=true` | Adds the X-XSS-Protection header with the value `1; mode=block`. |
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| `<prefix>.frontend.headers.contentSecurityPolicy=VALUE` | Adds CSP Header with the custom value. |
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| `<prefix>.frontend.headers.contentTypeNosniff=true` | Adds the `X-Content-Type-Options` header with the value `nosniff`. |
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| `<prefix>.frontend.headers.customBrowserXSSValue=VALUE` | Set custom value for X-XSS-Protection header. This overrides the BrowserXssFilter option. |
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| `<prefix>.frontend.headers.customFrameOptionsValue=VALUE` | Overrides the `X-Frame-Options` header with the custom value. |
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| `<prefix>.frontend.headers.forceSTSHeader=false` | Adds the STS header to non-SSL requests. |
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| `<prefix>.frontend.headers.frameDeny=false` | Adds the `X-Frame-Options` header with the value of `DENY`. |
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| `<prefix>.frontend.headers.hostsProxyHeaders=EXPR` | Provides a list of headers that the proxied hostname may be stored.<br>Format: `HEADER1,HEADER2` |
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| `<prefix>.frontend.headers.isDevelopment=false` | This will cause the `AllowedHosts`, `SSLRedirect`, and `STSSeconds`/`STSIncludeSubdomains` options to be ignored during development.<br>When deploying to production, be sure to set this to false. |
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| `<prefix>.frontend.headers.publicKey=VALUE` | Adds pinned HTST public key header. |
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| `<prefix>.frontend.headers.referrerPolicy=VALUE` | Adds referrer policy header. |
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| `<prefix>.frontend.headers.SSLRedirect=true` | Forces the frontend to redirect to SSL if a non-SSL request is sent. |
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| `<prefix>.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. |
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| `<prefix>.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. |
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| `<prefix>.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. |
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| `<prefix>.frontend.headers.SSLProxyHeaders=EXPR` | Header combinations that would signify a proper SSL Request (Such as `X-Forwarded-For:https`).<br>Format: <code>HEADER:value||HEADER2:value2</code> |
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| `<prefix>.frontend.headers.STSSeconds=315360000` | Sets the max-age of the STS header. |
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| `<prefix>.frontend.headers.STSIncludeSubdomains=true` | Adds the `IncludeSubdomains` section of the STS header. |
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| `<prefix>.frontend.headers.STSPreload=true` | Adds the preload flag to the STS header. |
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### Examples
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If you want that Træfik uses Consul tags correctly you need to defined them like that:
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```js
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traefik.enable=true
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traefik.tags=api
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traefik.tags=external
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```
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If the prefix defined in Træfik configuration is `bla`, tags need to be defined like that:
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```js
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bla.enable=true
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bla.tags=api
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bla.tags=external
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```
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