90 lines
3.4 KiB
Markdown
90 lines
3.4 KiB
Markdown
# Configuration Introduction
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How the Magic Happens
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{: .subtitle }
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Configuration in Traefik can refer to two different things:
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- The fully dynamic routing configuration (referred to as the _dynamic configuration_)
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- The startup configuration (referred to as the _static configuration_)
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Elements in the _static configuration_ set up connections to [providers](../providers/overview.md) and define the [entrypoints](../routing/entrypoints.md) Traefik will listen to (these elements don't change often).
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The _dynamic configuration_ contains everything that defines how the requests are handled by your system.
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This configuration can change and is seamlessly hot-reloaded, without any request interruption or connection loss.
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!!! warning "Incompatible Configuration"
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Please be aware that the old configurations for Traefik v1.x are NOT compatible with the v2.x config as of now.
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If you are running v2, please ensure you are using a v2 configuration.
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## The Dynamic Configuration
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Traefik gets its _dynamic configuration_ from [providers](../providers/overview.md): whether an orchestrator, a service registry, or a plain old configuration file.
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Since this configuration is specific to your infrastructure choices, we invite you to refer to the [dedicated section of this documentation](../routing/overview.md).
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!!! info ""
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In the [Quick Start example](../getting-started/quick-start.md), the dynamic configuration comes from docker in the form of labels attached to your containers.
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!!! info "HTTPS Certificates also belong to the dynamic configuration."
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You can add / update / remove them without restarting your Traefik instance.
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## The Static Configuration
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There are three different, **mutually exclusive** (i.e. you can use only one at the same time), ways to define static configuration options in Traefik:
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1. In a configuration file
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1. In the command-line arguments
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1. As environment variables
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These ways are evaluated in the order listed above.
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If no value was provided for a given option, a default value applies.
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Moreover, if an option has sub-options, and any of these sub-options is not specified, a default value will apply as well.
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For example, the `--providers.docker` option is enough by itself to enable the docker provider, even though sub-options like `--providers.docker.endpoint` exist.
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Once positioned, this option sets (and resets) all the default values of the sub-options of `--providers.docker`.
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### Configuration File
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At startup, Traefik searches for a file named `traefik.yml` (or `traefik.yaml` or `traefik.toml`) in:
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- `/etc/traefik/`
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- `$XDG_CONFIG_HOME/`
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- `$HOME/.config/`
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- `.` (_the working directory_).
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You can override this using the `configFile` argument.
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```bash
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traefik --configFile=foo/bar/myconfigfile.yml
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```
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### Arguments
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To get the list of all available arguments:
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```bash
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traefik --help
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# or
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docker run traefik[:version] --help
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# ex: docker run traefik:v2.6 --help
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```
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All available arguments can also be found [here](../reference/static-configuration/cli.md).
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### Environment Variables
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All available environment variables can be found [here](../reference/static-configuration/env.md)
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## Available Configuration Options
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All the configuration options are documented in their related section.
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You can browse the available features in the menu, the [providers](../providers/overview.md), or the [routing section](../routing/overview.md) to see them in action.
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