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Martin 2016-07-11 17:32:28 +02:00
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@ -756,7 +756,7 @@ prefix = "traefik"
# insecureskipverify = true
```
Please refer to the [Key Value storage structure](#key-value-storage-structure) section to get documentation en traefik KV structure.
Please refer to the [Key Value storage structure](/user-guide/kv-config/#key-value-storage-structure) section to get documentation on traefik KV structure.
## Consul catalog backend
@ -857,7 +857,7 @@ prefix = "/traefik"
# insecureskipverify = true
```
Please refer to the [Key Value storage structure](#key-value-storage-structure) section to get documentation en traefik KV structure.
Please refer to the [Key Value storage structure](/user-guide/kv-config/#key-value-storage-structure) section to get documentation on traefik KV structure.
## Zookeeper backend
@ -900,7 +900,7 @@ prefix = "/traefik"
# filename = "zookeeper.tmpl"
```
Please refer to the [Key Value storage structure](#key-value-storage-structure) section to get documentation en traefik KV structure.
Please refer to the [Key Value storage structure](/user-guide/kv-config/#key-value-storage-structure) section to get documentation on traefik KV structure.
## BoltDB backend
@ -942,85 +942,4 @@ prefix = "/traefik"
# filename = "boltdb.tmpl"
```
Please refer to the [Key Value storage structure](#key-value-storage-structure) section to get documentation en traefik KV structure.
## Key-value storage structure
The Keys-Values structure should look (using `prefix = "/traefik"`):
- backend 1
| Key | Value |
|--------------------------------------------------------|-----------------------------|
| `/traefik/backends/backend1/circuitbreaker/expression` | `NetworkErrorRatio() > 0.5` |
| `/traefik/backends/backend1/servers/server1/url` | `http://172.17.0.2:80` |
| `/traefik/backends/backend1/servers/server1/weight` | `10` |
| `/traefik/backends/backend1/servers/server2/url` | `http://172.17.0.3:80` |
| `/traefik/backends/backend1/servers/server2/weight` | `1` |
- backend 2
| Key | Value |
|-----------------------------------------------------|------------------------|
| `/traefik/backends/backend2/maxconn/amount` | `10` |
| `/traefik/backends/backend2/maxconn/extractorfunc` | `request.host` |
| `/traefik/backends/backend2/loadbalancer/method` | `drr` |
| `/traefik/backends/backend2/servers/server1/url` | `http://172.17.0.4:80` |
| `/traefik/backends/backend2/servers/server1/weight` | `1` |
| `/traefik/backends/backend2/servers/server2/url` | `http://172.17.0.5:80` |
| `/traefik/backends/backend2/servers/server2/weight` | `2` |
- frontend 1
| Key | Value |
|---------------------------------------------------|-----------------------|
| `/traefik/frontends/frontend1/backend` | `backend2` |
| `/traefik/frontends/frontend1/routes/test_1/rule` | `Host:test.localhost` |
- frontend 2
| Key | Value |
|----------------------------------------------------|--------------------|
| `/traefik/frontends/frontend2/backend` | `backend1` |
| `/traefik/frontends/frontend2/passHostHeader` | `true` |
| `/traefik/frontends/frontend2/priority` | `10` |
| `/traefik/frontends/frontend2/entrypoints` | `http,https` |
| `/traefik/frontends/frontend2/routes/test_2/rule` | `PathPrefix:/test` |
## Atomic configuration changes
The [Etcd](https://github.com/coreos/etcd/issues/860) and [Consul](https://github.com/hashicorp/consul/issues/886) backends do not support updating multiple keys atomically. As a result, it may be possible for Træfɪk to read an intermediate configuration state despite judicious use of the `--providersThrottleDuration` flag. To solve this problem, Træfɪk supports a special key called `/traefik/alias`. If set, Træfɪk use the value as an alternative key prefix.
Given the key structure below, Træfɪk will use the `http://172.17.0.2:80` as its only backend (frontend keys have been omitted for brevity).
| Key | Value |
|-------------------------------------------------------------------------|-----------------------------|
| `/traefik/alias` | `/traefik_configurations/1` |
| `/traefik_configurations/1/backends/backend1/servers/server1/url` | `http://172.17.0.2:80` |
| `/traefik_configurations/1/backends/backend1/servers/server1/weight` | `10` |
When an atomic configuration change is required, you may write a new configuration at an alternative prefix. Here, although the `/traefik_configurations/2/...` keys have been set, the old configuration is still active because the `/traefik/alias` key still points to `/traefik_configurations/1`:
| Key | Value |
|-------------------------------------------------------------------------|-----------------------------|
| `/traefik/alias` | `/traefik_configurations/1` |
| `/traefik_configurations/1/backends/backend1/servers/server1/url` | `http://172.17.0.2:80` |
| `/traefik_configurations/1/backends/backend1/servers/server1/weight` | `10` |
| `/traefik_configurations/2/backends/backend1/servers/server1/url` | `http://172.17.0.2:80` |
| `/traefik_configurations/2/backends/backend1/servers/server1/weight` | `5` |
| `/traefik_configurations/2/backends/backend1/servers/server2/url` | `http://172.17.0.3:80` |
| `/traefik_configurations/2/backends/backend1/servers/server2/weight` | `5` |
Once the `/traefik/alias` key is updated, the new `/traefik_configurations/2` configuration becomes active atomically. Here, we have a 50% balance between the `http://172.17.0.3:80` and the `http://172.17.0.4:80` hosts while no traffic is sent to the `172.17.0.2:80` host:
| Key | Value |
|-------------------------------------------------------------------------|-----------------------------|
| `/traefik/alias` | `/traefik_configurations/2` |
| `/traefik_configurations/1/backends/backend1/servers/server1/url` | `http://172.17.0.2:80` |
| `/traefik_configurations/1/backends/backend1/servers/server1/weight` | `10` |
| `/traefik_configurations/2/backends/backend1/servers/server1/url` | `http://172.17.0.3:80` |
| `/traefik_configurations/2/backends/backend1/servers/server1/weight` | `5` |
| `/traefik_configurations/2/backends/backend1/servers/server2/url` | `http://172.17.0.4:80` |
| `/traefik_configurations/2/backends/backend1/servers/server2/weight` | `5` |
Note that Træfɪk *will not watch for key changes in the `/traefik_configurations` prefix*. It will only watch for changes in the `/traefik` prefix. Further, if the `/traefik/alias` key is set, all other sibling keys with the `/traefik` prefix are ignored.
Please refer to the [Key Value storage structure](/user-guide/kv-config/#key-value-storage-structure) section to get documentation on traefik KV structure.