Update doc on combining multiple rules and priorities
Signed-off-by: Emile Vauge <emile@vauge.com>
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@ -90,13 +90,52 @@ Here is an example of frontends definition:
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rule = "Host: localhost, {subdomain:[a-z]+}.localhost"
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[frontends.frontend3]
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backend = "backend2"
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[frontends.frontend3.routes.test_1]
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rule = "Host: test3.localhost;Path:/test"
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```
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- Three frontends are defined: `frontend1`, `frontend2` and `frontend3`
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- `frontend1` will forward the traffic to the `backend2` if the rule `Host: test.localhost, test2.localhost` is matched
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- `frontend2` will forward the traffic to the `backend1` if the rule `Host: localhost, {subdomain:[a-z]+}.localhost` is matched (forwarding client `Host` header to the backend)
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- `frontend3` will forward the traffic to the `backend2` if the rules `Host: test3.localhost` and `Path:/test` are matched
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- `frontend3` will forward the traffic to the `backend2` if the rules `Host: test3.localhost` **and** `Path:/test` are matched
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### Combining multiple rules
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As seen in the previous example, you can combine multiple rules.
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In TOML file, you can use multiple routes:
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```toml
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[frontends.frontend3]
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backend = "backend2"
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[frontends.frontend3.routes.test_1]
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rule = "Host: test3.localhost"
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[frontends.frontend3.routes.test_2]
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rule = "Host: Path:/test"
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```
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Here `frontend3` will forward the traffic to the `backend2` if the rules `Host: test3.localhost` **and** `Path:/test` are matched.
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You can also use the notation using a `;` separator:
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```toml
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[frontends.frontend3]
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backend = "backend2"
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[frontends.frontend3.routes.test_1]
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rule = "Host: test3.localhost;Path:/test"
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```
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Finally, you can create a rule to bind multiple domains or Path to a frontend, using the `,` separator:
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```toml
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[frontends.frontend2]
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[frontends.frontend2.routes.test_1]
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rule = "Host: test1.localhost,Host: test2.localhost"
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[frontends.frontend3]
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backend = "backend2"
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[frontends.frontend3.routes.test_1]
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rule = "Path:/test1,/test2"
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```
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### Priorities
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By default, routes will be sorted using rules length (to avoid path overlap):
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`PathPrefix:/12345` will be matched before `PathPrefix:/1234` that will be matched before `PathPrefix:/1`.
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