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healthcheck: support TCP health check with ProxyProtocol
Commit Message: healthcheck: support TCP health check with ProxyProtocol
Additional Description: This PR aims to support TCP healthcheck with ProxyProtocol. This feature is useful to ensure Proxy Protocol is enabled or not from upstream servers. It works in addition to normal TCP based healthcheck. This feature is the equivalent with check-send-proxy
provided by HAProxy. https://cbonte.github.io/haproxy-dconv/2.0/configuration.html#5.2-check-send-proxy
Risk Level: Low
Testing: Unit/Integration
Docs Changes: Required
Release Notes:
Platform Specific Features:
[Optional Runtime guard:]
[Optional Fixes #Issue]
[Optional Fixes commit #PR or SHA]
[Optional Deprecated:]
[Optional API Considerations:]
CC @envoyproxy/api-shepherds: Your approval is needed for changes made to (api/envoy/|docs/root/api-docs/)
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envoyproxy/api-shepherds assignee is @lizan
CC @envoyproxy/api-watchers: FYI only for changes made to (api/envoy/|docs/root/api-docs/)
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/lgtm api
@zuercher for owner review
@zuercher friendly ping
/lgtm api
@Shikugawa one last thing, can you add a release note for the new field?
Sorry, I failed to note that we need a second code reviewer before merging. @botengyao can you have a look?
/wait
ping @Shikugawa
This pull request has been automatically marked as stale because it has not had activity in the last 30 days. It will be closed in 7 days if no further activity occurs. Please feel free to give a status update now, ping for review, or re-open when it's ready. Thank you for your contributions!
This pull request has been automatically closed because it has not had activity in the last 37 days. Please feel free to give a status update now, ping for review, or re-open when it's ready. Thank you for your contributions!
@botengyao @zuercher i think this is waiting for final review
@zuercher Fixed conflict. Could you please approve again?
/retest