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consul/.changelog/17894.txt

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Fix incorrect protocol for transparent proxy upstreams. (#17894) This PR fixes a bug that was introduced in: https://github.com/hashicorp/consul/pull/16021 A user setting a protocol in proxy-defaults would cause tproxy implicit upstreams to not honor the upstream service's protocol set in its `ServiceDefaults.Protocol` field, and would instead always use the proxy-defaults value. Due to the fact that upstreams configured with "tcp" can successfully contact upstream "http" services, this issue was not recognized until recently (a proxy-defaults with "tcp" and a listening service with "http" would make successful requests, but not the opposite). As a temporary work-around, users experiencing this issue can explicitly set the protocol on the `ServiceDefaults.UpstreamConfig.Overrides`, which should take precedence. The fix in this PR removes the proxy-defaults protocol from the wildcard upstream that tproxy uses to configure implicit upstreams. When the protocol was included, it would always overwrite the value during discovery chain compilation, which was not correct. The discovery chain compiler also consumes proxy defaults to determine the protocol, so simply excluding it from the wildcard upstream config map resolves the issue.
2023-07-05 14:32:10 +00:00
```release-note:bug
connect: Fix incorrect protocol config merging for transparent proxy implicit upstreams.
```