Per https://cbonte.github.io/haproxy-dconv/2.0/configuration.html#4
- TUN: tunnel ("option http-tunnel") : this was the default mode for versions
1.0 to 1.5-dev21 : only the first request and response are processed, and
everything else is forwarded with no analysis at all. This mode should not
be used as it creates lots of trouble with logging and HTTP processing.
And because it cannot work in HTTP/2, this option is deprecated and it is
only supported on legacy HTTP frontends. In HTX, it is ignored and a
warning is emitted during HAProxy startup.
All kolla environments use 1.5+ since Rocky ( https://ethercalc.openstack.org/kolla-infra-service-matrix ) and it is recommended to switch this mode to avoid odd issues (I wonder if our random issues with neutron are not due to this thing but hard to triage).
Fix proposed to branch: master
Review: https:/