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docs: document preserve_host_header with policy routes to static ip (#1024)

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Fixes #1012
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Cuong Manh Le 2020-06-30 14:26:08 +07:00 • committed by GitHub
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docs/docs/upgrading.md
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@ -58,6 +58,14 @@ In `0.9.0`:
option httpchk GET /ping HTTP/1.1\r\nHost:pomerium
```
### preserve_host_header option
With this release, Pomerium uses an embedded envoy proxy instead hand-written one. Thus, we defer the preserve host header
functionality to [envoy's auto_host_rewrite](https://www.envoyproxy.io/docs/envoy/latest/api-v3/config/route/v3/route_components.proto#envoy-v3-api-field-config-route-v3-routeaction-auto-host-rewrite),
which does not affect if the policy routes to a static IP.
To preserve 0.8.x behavior, you can use the `set_request_headers` option to explicitly set the Host header.
# Since 0.8.0
## Breaking