mirror of
https://github.com/traefik/traefik.git
synced 2025-10-31 08:21:27 +01:00
105 lines
3.6 KiB
Markdown
105 lines
3.6 KiB
Markdown
# Overview
|
|
|
|
Traefik's Many Friends
|
|
{: .subtitle }
|
|
|
|
|
|
|
|
Configuration discovery in Traefik is achieved through _Providers_.
|
|
|
|
The _providers_ are existing infrastructure components, whether orchestrators, container engines, cloud providers, or key-value stores.
|
|
The idea is that Traefik will query the providers' API in order to find relevant information about routing,
|
|
and each time Traefik detects a change, it dynamically updates the routes.
|
|
|
|
Deploy and forget is Traefik's credo.
|
|
|
|
## Orchestrators
|
|
|
|
Even if each provider is different, we can categorize them in four groups:
|
|
|
|
- Label based (each deployed container has a set of labels attached to it)
|
|
- Key-Value based (each deployed container updates a key-value store with relevant information)
|
|
- Annotation based (a separate object, with annotations, defines the characteristics of the container)
|
|
- File based (the good old configuration file)
|
|
|
|
## Supported Providers
|
|
|
|
Below is the list of the currently supported providers in Traefik.
|
|
|
|
| Provider | Type | Configuration Type |
|
|
|-----------------------------------|--------------|--------------------|
|
|
| [Docker](./docker.md) | Orchestrator | Label |
|
|
| [Kubernetes](./kubernetes-crd.md) | Orchestrator | Custom Resource |
|
|
| [Marathon](./marathon.md) | Orchestrator | Label |
|
|
| [Rancher](./rancher.md) | Orchestrator | Label |
|
|
| [File](./file.md) | Manual | TOML/YAML format |
|
|
|
|
!!! info "More Providers"
|
|
|
|
The current version of Traefik doesn't support (yet) every provider.
|
|
See the [previous version (v1.7)](https://docs.traefik.io/v1.7/) for more providers.
|
|
|
|
### Configuration reload frequency
|
|
|
|
In some cases, some providers might undergo a sudden burst of changes,
|
|
which would generate a lot of configuration change events.
|
|
If Traefik took them all into account,
|
|
that would trigger a lot more configuration reloads than what is necessary,
|
|
or even useful.
|
|
|
|
In order to mitigate that, the `providers.providersThrottleDuration` option can be set.
|
|
It is the duration that Traefik waits for, after a configuration reload,
|
|
before taking into account any new configuration refresh event.
|
|
If any event arrives during that duration, only the most recent one is taken into account,
|
|
and all the previous others are dropped.
|
|
|
|
This option cannot be set per provider,
|
|
but the throttling algorithm applies independently to each of them.
|
|
It defaults to 2 seconds.
|
|
|
|
```toml tab="File (TOML)"
|
|
[providers]
|
|
providers.providersThrottleDuration = 10s
|
|
```
|
|
|
|
```yaml tab="File (YAML)"
|
|
providers:
|
|
providersThrottleDuration: 10s
|
|
```
|
|
|
|
```bash tab="CLI"
|
|
--providers.providersThrottleDuration=10s
|
|
```
|
|
|
|
<!--
|
|
TODO (document TCP VS HTTP dynamic configuration)
|
|
-->
|
|
|
|
## Restrict the Scope of Service Discovery
|
|
|
|
By default Traefik will create routes for all detected containers.
|
|
|
|
If you want to limit the scope of Traefik's service discovery,
|
|
i.e. disallow route creation for some containers,
|
|
you can do so in two different ways:
|
|
either with the generic configuration option `exposedByDefault`,
|
|
or with a finer granularity mechanism based on constraints.
|
|
|
|
### `exposedByDefault` and `traefik.enable`
|
|
|
|
List of providers that support that feature:
|
|
|
|
- [Docker](./docker.md#exposedbydefault)
|
|
- [Rancher](./rancher.md#exposedbydefault)
|
|
- [Marathon](./marathon.md#exposedbydefault)
|
|
|
|
### Constraints
|
|
|
|
List of providers that support constraints:
|
|
|
|
- [Docker](./docker.md#constraints)
|
|
- [Rancher](./rancher.md#constraints)
|
|
- [Marathon](./marathon.md#constraints)
|
|
- [Kubernetes CRD](./kubernetes-crd.md#labelselector)
|
|
- [Kubernetes Ingress](./kubernetes-ingress.md#labelselector)
|