71 lines
2.6 KiB
Markdown
71 lines
2.6 KiB
Markdown
# Overview
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Traefik's Many Friends
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{: .subtitle }
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Configuration discovery in Traefik is achieved through _Providers_.
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The _providers_ are existing infrastructure components, whether orchestrators, container engines, cloud providers, or key-value stores.
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The idea is that Traefik will query the providers' API in order to find relevant information about routing,
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and each time Traefik detects a change, it dynamically updates the routes.
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Deploy and forget is Traefik's credo.
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## Orchestrators
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Even if each provider is different, we can categorize them in four groups:
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- Label based (each deployed container has a set of labels attached to it)
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- Key-Value based (each deployed container updates a key-value store with relevant information)
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- Annotation based (a separate object, with annotations, defines the characteristics of the container)
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- File based (the good old configuration file)
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## Supported Providers
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Below is the list of the currently supported providers in Traefik.
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| Provider | Type | Configuration Type |
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|-----------------------------------|--------------|--------------------|
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| [Docker](./docker.md) | Orchestrator | Label |
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| [Kubernetes](./kubernetes-crd.md) | Orchestrator | Custom Resource |
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| [Marathon](./marathon.md) | Orchestrator | Label |
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| [Rancher](./rancher.md) | Orchestrator | Label |
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| [File](./file.md) | Manual | TOML format |
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!!! note "More Providers"
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The current version of Traefik is in development and doesn't support (yet) every provider.
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See the previous version (1.7) for more providers.
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<!--
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TODO (document TCP VS HTTP dynamic configuration)
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-->
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## Restrict the Scope of Service Discovery
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By default Traefik will create routes for all detected containers.
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If you want to limit the scope of Traefik's service discovery,
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i.e. disallow route creation for some containers,
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you can do so in two different ways:
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either with the generic configuration option `exposedByDefault`,
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or with a finer granularity mechanism based on constraints.
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### `exposedByDefault` and `traefik.enable`
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List of providers that support that feature:
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- [Docker](./docker.md#exposedbydefault)
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- [Rancher](./rancher.md#exposedbydefault)
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- [Marathon](./marathon.md#exposedbydefault)
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### Constraints
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List of providers that support constraints:
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- [Docker](./docker.md#constraints)
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- [Rancher](./rancher.md#constraints)
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- [Marathon](./marathon.md#constraints)
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- [Kubernetes CRD](./kubernetes-crd.md#labelselector)
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