tree 9728096e5b6a6fe3a2687484ed095905ad78eb0e
parent 26beb93bfe4e854f721d9dcef6dbc6f9709fe906
author Antonio Barone <syntonyze@gmail.com> 1606406378 +0100
committer Antonio Barone <syntonyze@gmail.com> 1606406378 +0100

Explicitly set Host header in health checks

By default haproxy does not set any header when performing healthcheck
requests[1].

Ideally this would be fine, since HTTP/1.0 protocol does not require
`Host` header as mandatory, however different HTTP server
implementations might not strictly adhere to this specification.

This is the case of jetty-9.4.32.v20200930, which is used in gerrit
stable-3.3.

Always set the Host header when performing http healthchecks so that
they succeed regardless the target's implementation of the HTTP
protocol.

[1]https://cbonte.github.io/haproxy-dconv/1.7/configuration.html#option%20httpchk

Bug: Issue 13732
Change-Id: I050ad61bc8c85b95e107af411dcec10850967619