Ludovic Fernandez f149b56063 Enhance API, REST, ping documentation.

2018-03-01 08:42:03 +01:00

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Web Backend

!!! danger "DEPRECATED" The web provider is deprecated, please use the api, the ping, the metrics and the rest provider.

Træfik can be configured:

using a RESTful api.
to use a monitoring system (like Prometheus, DataDog or StatD, ...).
to expose a Web Dashboard.

Configuration

# Enable web backend.
[web]

# Web administration port.
#
# Required
# Default: ":8080"
#
address = ":8080"

# SSL certificate and key used.
#
# Optional
#
# certFile = "traefik.crt"
# keyFile = "traefik.key"

# Set REST API to read-only mode.
#
# Optional
# Default: false
#
readOnly = true

# Set the root path for webui and API
#
# Deprecated
# Optional
#
# path = "/mypath"
#

Web UI

Authentication

!!! note The /ping path of the API is excluded from authentication (since 1.4).

Basic Authentication

Passwords can be encoded in MD5, SHA1 and BCrypt: you can use htpasswd to generate those ones.

Users can be specified directly in the TOML file, or indirectly by referencing an external file; if both are provided, the two are merged, with external file contents having precedence.

[web]
# ...

# To enable basic auth on the webui with 2 user/pass: test:test and test2:test2
[web.auth.basic]
users = ["test:$apr1$H6uskkkW$IgXLP6ewTrSuBkTrqE8wj/", "test2:$apr1$d9hr9HBB$4HxwgUir3HP4EsggP/QNo0"]
usersFile = "/path/to/.htpasswd"

# ...

Digest Authentication

You can use htdigest to generate those ones.

Users can be specified directly in the TOML file, or indirectly by referencing an external file; if both are provided, the two are merged, with external file contents having precedence

[web]
# ...

# To enable digest auth on the webui with 2 user/realm/pass: test:traefik:test and test2:traefik:test2
[web.auth.digest]
users = ["test:traefik:a2688e031edb4be6a3797f3882655c05", "test2:traefik:518845800f9e2bfb1f1f740ec24f074e"]
usersFile = "/path/to/.htdigest"

# ...

Metrics

You can enable Træfik to export internal metrics to different monitoring systems.

Prometheus

[web]
# ...

# To enable Traefik to export internal metrics to Prometheus
[web.metrics.prometheus]

# Buckets for latency metrics
#
# Optional
# Default: [0.1, 0.3, 1.2, 5]
buckets=[0.1,0.3,1.2,5.0]

# ...

DataDog

[web]
# ...

# DataDog metrics exporter type
[web.metrics.datadog]

# DataDog's address.
#
# Required
# Default: "localhost:8125"
#
address = "localhost:8125"

# DataDog push interval
#
# Optional
# Default: "10s"
#
pushinterval = "10s"

# ...

StatsD

[web]
# ...

# StatsD metrics exporter type
[web.metrics.statsd]

# StatD's address.
#
# Required
# Default: "localhost:8125"
#
address = "localhost:8125"

# StatD push interval
#
# Optional
# Default: "10s"
#
pushinterval = "10s"

# ...

InfluxDB

[web]
# ...

# InfluxDB metrics exporter type
[web.metrics.influxdb]

# InfluxDB's address.
#
# Required
# Default: "localhost:8089"
#
address = "localhost:8089"

# InfluxDB push interval
#
# Optional
# Default: "10s"
#
pushinterval = "10s"

# ...

Statistics

[web]
# ...

# Enable more detailed statistics.
[web.statistics]

# Number of recent errors logged.
#
# Default: 10
#
recentErrors = 10

# ...

API

Path	Method	Description
`/`	`GET`	Provides a simple HTML frontend of Træfik
`/ping`	`GET`, `HEAD`	A simple endpoint to check for Træfik process liveness. Return a code `200` with the content: `OK`
`/health`	`GET`	JSON health metrics
`/api`	`GET`	Configuration for all providers
`/api/providers`	`GET`	Providers
`/api/providers/{provider}`	`GET`, `PUT`	Get or update provider
`/api/providers/{provider}/backends`	`GET`	List backends
`/api/providers/{provider}/backends/{backend}`	`GET`	Get backend
`/api/providers/{provider}/backends/{backend}/servers`	`GET`	List servers in backend
`/api/providers/{provider}/backends/{backend}/servers/{server}`	`GET`	Get a server in a backend
`/api/providers/{provider}/frontends`	`GET`	List frontends
`/api/providers/{provider}/frontends/{frontend}`	`GET`	Get a frontend
`/api/providers/{provider}/frontends/{frontend}/routes`	`GET`	List routes in a frontend
`/api/providers/{provider}/frontends/{frontend}/routes/{route}`	`GET`	Get a route in a frontend
`/metrics`	`GET`	Export internal metrics

Example

Ping

curl -sv "http://localhost:8080/ping"

*   Trying ::1...
* Connected to localhost (::1) port 8080 (\#0)
> GET /ping HTTP/1.1
> Host: localhost:8080
> User-Agent: curl/7.43.0
> Accept: */*
>
< HTTP/1.1 200 OK
< Date: Thu, 25 Aug 2016 01:35:36 GMT
< Content-Length: 2
< Content-Type: text/plain; charset=utf-8
<
* Connection \#0 to host localhost left intact
OK

Health

curl -s "http://localhost:8080/health" | jq .

{
  // Træfik PID
  "pid": 2458,
  // Træfik server uptime (formated time)
  "uptime": "39m6.885931127s",
  //  Træfik server uptime in seconds
  "uptime_sec": 2346.885931127,
  // current server date
  "time": "2015-10-07 18:32:24.362238909 +0200 CEST",
  // current server date in seconds
  "unixtime": 1444235544,
  // count HTTP response status code in realtime
  "status_code_count": {
    "502": 1
  },
  // count HTTP response status code since Træfik started
  "total_status_code_count": {
    "200": 7,
    "404": 21,
    "502": 13
  },
  // count HTTP response
  "count": 1,
  // count HTTP response
  "total_count": 41,
  // sum of all response time (formated time)
  "total_response_time": "35.456865605s",
  // sum of all response time in seconds
  "total_response_time_sec": 35.456865605,
  // average response time (formated time)
  "average_response_time": "864.8016ms",
  // average response time in seconds
  "average_response_time_sec": 0.8648016000000001,

  // request statistics [requires --web.statistics to be set]
  // ten most recent requests with 4xx and 5xx status codes
  "recent_errors": [
    {
      // status code
      "status_code": 500,
      // description of status code
      "status": "Internal Server Error",
      // request HTTP method
      "method": "GET",
      // request host name
      "host": "localhost",
      // request path
      "path": "/path",
      // RFC 3339 formatted date/time
      "time": "2016-10-21T16:59:15.418495872-07:00"
    }
  ]
}

Provider configurations

curl -s "http://localhost:8080/api" | jq .

{
  "file": {
    "frontends": {
      "frontend2": {
        "routes": {
          "test_2": {
            "rule": "Path:/test"
          }
        },
        "backend": "backend1"
      },
      "frontend1": {
        "routes": {
          "test_1": {
            "rule": "Host:test.localhost"
          }
        },
        "backend": "backend2"
      }
    },
    "backends": {
      "backend2": {
        "loadBalancer": {
          "method": "drr"
        },
        "servers": {
          "server2": {
            "weight": 2,
            "URL": "http://172.17.0.5:80"
          },
          "server1": {
            "weight": 1,
            "url": "http://172.17.0.4:80"
          }
        }
      },
      "backend1": {
        "loadBalancer": {
          "method": "wrr"
        },
        "circuitBreaker": {
          "expression": "NetworkErrorRatio() > 0.5"
        },
        "servers": {
          "server2": {
            "weight": 1,
            "url": "http://172.17.0.3:80"
          },
          "server1": {
            "weight": 10,
            "url": "http://172.17.0.2:80"
          }
        }
      }
    }
  }
}

Deprecation compatibility

Address

As the web provider is deprecated, you can handle the Address option like this:

defaultEntryPoints = ["http"]

[entryPoints]
  [entryPoints.http]
  address = ":80"

  [entryPoints.foo]
  address = ":8082"

  [entryPoints.bar]
  address = ":8083"

[ping]
entryPoint = "foo"

[api]
entryPoint = "bar"

In the above example, you would access a regular path, administration panel, and health-check as follows:

Regular path: http://hostname:80/path
Admin Panel: http://hostname:8083/
Ping URL: http://hostname:8082/ping

In the above example, it is very important to create a named dedicated entry point, and do not include it in defaultEntryPoints. Otherwise, you are likely to expose all services via that entry point.

Path

As the web provider is deprecated, you can handle the Path option like this:

defaultEntryPoints = ["http"]

[entryPoints]
  [entryPoints.http]
  address = ":80"

  [entryPoints.foo]
  address = ":8080"

  [entryPoints.bar]
  address = ":8081"

# Activate API and Dashboard
[api]
entryPoint = "bar"
dashboard = true

[file]
  [backends]
    [backends.backend1]
      [backends.backend1.servers.server1]
      url = "http://127.0.0.1:8081"

  [frontends]
    [frontends.frontend1]
    entryPoints = ["foo"]
    backend = "backend1"
      [frontends.frontend1.routes.test_1]
      rule = "PathPrefixStrip:/yourprefix;PathPrefix:/yourprefix"

Authentication

As the web provider is deprecated, you can handle the auth option like this:

defaultEntryPoints = ["http"]

[entryPoints]
  [entryPoints.http]
  address = ":80"

 [entryPoints.foo]
   address=":8080"
   [entryPoints.foo.auth]
     [entryPoints.foo.auth.basic]
       users = [
         "test:$apr1$H6uskkkW$IgXLP6ewTrSuBkTrqE8wj/",
         "test2:$apr1$d9hr9HBB$4HxwgUir3HP4EsggP/QNo0",
       ]

[api]
entrypoint="foo"

For more information, see entry points .

12 KiB Raw Blame History

Web Backend

Configuration

Web UI

Authentication

Basic Authentication

Digest Authentication

Metrics

Prometheus

DataDog

StatsD

InfluxDB

Statistics

API

Example

Ping

Health

Provider configurations

Deprecation compatibility

Address

Path

Authentication

12 KiB

Raw Blame History