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Reviewed-on: https://codeberg.org/Codeberg/pages-server/pulls/319 Reviewed-by: crapStone <codeberg@crapstone.dev> Co-authored-by: pat-s <patrick.schratz@gmail.com> Co-committed-by: pat-s <patrick.schratz@gmail.com>
26 lines
1.3 KiB
Markdown
26 lines
1.3 KiB
Markdown
# HAProxy with SNI & Host-based rules
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This is a proof of concept, enabling HAProxy to use _either_ SNI to redirect to backends with their own HTTPS certificates (which are then fully exposed to the client; HAProxy only proxies on a TCP level in that case), _as well as_ to terminate HTTPS and use the Host header to redirect to backends that use HTTP (or a new HTTPS connection).
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## How it works
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1. The `http_redirect_frontend` is only there to listen on port 80 and redirect every request to HTTPS.
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2. The `https_sni_frontend` listens on port 443 and chooses a backend based on the SNI hostname of the TLS connection.
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3. The `https_termination_backend` passes all requests to a unix socket (using the plain TCP data).
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4. The `https_termination_frontend` listens on said unix socket, terminates the HTTPS connections and then chooses a backend based on the Host header.
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In the example (see [haproxy.cfg](haproxy.cfg)), the `pages_backend` is listening via HTTPS and is providing its own HTTPS certificates, while the `gitea_backend` only provides HTTP.
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## How to test
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```bash
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docker-compose up &
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./test.sh
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docker-compose down
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# For manual testing: all HTTPS URLs connect to localhost:443 & certificates are not verified.
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./test.sh [curl-options...] <url>
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```
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