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doc: structural review

Browse source 
- user-guide review.
- add DataDog and StatD configuration.
- sync sample.toml and doc.
- split entry points doc.
- Deprecated.
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Fernandez Ludovic 2017-08-26 12:12:44 +02:00 • committed by Traefiker
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docs/backends/api.md
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# API backend
Træfik can be configured using a RESTful api.
## Configuration
### CLI
| Flag | Description | Default |
|------------------------------------|----------------------------------|---------------------|
| `--web` | Enable Web backend | `"true"` |
| `--web.address` | Web administration port | `":8080"` |
| `--web.certfile` | SSL certificate | |
| `--web.keyfile` | SSL key | |
| `--web.metrics` | Enable a metrics exporter | `"true"` |
| `--web.metrics.prometheus` | Prometheus metrics exporter type | `"true"` |
| `--web.metrics.prometheus.buckets` | Buckets for latency metrics | `"[0.1 0.3 1.2 5]"` |
| `--web.path` | Root path for dashboard and API | |
| `--web.readonly` | Enable read only API | `"false"` |
| `--web.statistics` | Enable more detailed statistics | `"false"` |
| `--web.statistics.recenterrors` | Number of recent errors logged | `"10"` |
### traefik.toml:
```toml
[web]
address = ":8080"
# Set the root path for webui and API
#
# Optional
#
# path = "/mypath"
#
# SSL certificate and key used
#
# Optional
#
# CertFile = "traefik.crt"
# KeyFile = "traefik.key"
#
# Set REST API to read-only mode
#
# Optional
# ReadOnly = false
#
# To enable more detailed statistics
# [web.statistics]
# RecentErrors = 10
#
# To enable Traefik to export internal metrics to Prometheus
# [web.metrics.prometheus]
# Buckets=[0.1,0.3,1.2,5.0]
#
# To enable Traefik to export internal metics to DataDog
# [web.metrics.datadog]
# Address = localhost:8125
# PushInterval = "10s"
#
# To enable Traefik to export internal metics to StatsD
# [web.metrics.statsd]
# Address = localhost:8125
# PushInterval = "10s"
#
# To enable basic auth on the webui
# with 2 user/pass: test:test and test2:test2
# 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.auth.basic]
# users = ["test:$apr1$H6uskkkW$IgXLP6ewTrSuBkTrqE8wj/", "test2:$apr1$d9hr9HBB$4HxwgUir3HP4EsggP/QNo0"]
# usersFile = "/path/to/.htpasswd"
# To enable digest auth on the webui
# with 2 user/realm/pass: test:traefik:test and test2:traefik:test2
# 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.auth.digest]
# users = ["test:traefik:a2688e031edb4be6a3797f3882655c05 ", "test2:traefik:518845800f9e2bfb1f1f740ec24f074e"]
# usersFile = "/path/to/.htdigest"
```
## Web UI
![Web UI Providers](/img/web.frontend.png)
![Web UI Health](/img/traefik-health.png)
## 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 |
> You can enable Traefik to export internal metrics to different monitoring systems (Only Prometheus is supported at the moment).
>```bash
>$ traefik --web.metrics.prometheus --web.metrics.prometheus.buckets="0.1,0.3,1.2,5.0"
>```
### Example
#### Ping
```shell
$ 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
```shell
$ 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 hostname
"host": "localhost",
// request path
"path": "/path",
// RFC 3339 formatted date/time
"time": "2016-10-21T16:59:15.418495872-07:00"
}
]
}
```
#### Provider configurations
```shell
$ 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"
}
}
}
}
}
}
```