35 lines
2.1 KiB
Markdown
35 lines
2.1 KiB
Markdown
# Concepts
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Everything You Need to Know
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{: .subtitle }
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## Edge Router
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Traefik is an _Edge Router_, it means that it's the door to your platform, and that it intercepts and routes every incoming request: it knows all the logic and every rule that determine which services handle which requests (based on the [path](../../routing/routers/#rule), the [host](../../routing/routers/#rule), [headers](../../routing/routers/#rule), [and so on](../../routing/routers/#rule) ...).
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## Auto Service Discovery
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Where traditionally edge routers (or reverse proxies) need a configuration file that contains every possible route to your services, Traefik gets them from the services themselves.
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Deploying your services, you attach information that tell Traefik the characteristics of the requests the services can handle.
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It means that when a service is deployed, Traefik detects it immediately and updates the routing rules in real time.
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The opposite is true: when you remove a service from your infrastructure, the route will disapear accordingly.
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You no longer need to create and synchronize configuration files cluttered with IP addresses or other rules.
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!!! note "Many different rules"
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In the example above, we used the request [path](../routing/routers/index.md#rule) to determine which service was in charge, but of course you can use many other different [rules](../routing/routers/index.md#rule).
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!!! note "Updating the requests"
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In the [middleware](../middlewares/overview.md) section, you can learn about how to update the requests before forwarding them to the services.
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!!! question "How does Traefik discover the services?"
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Traefik is able to use your cluster API to discover the services and read the attached information. In Traefik, these connectors are called [providers](../providers/overview.md) because they _provide_ the configuration to Traefik. To learn more about them, read the [provider overview](../providers/overview.md) section.
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