Prepare v0.40.0

[jpkrohling]

Closes open-telemetry/opentelemetry-collector#4477
Closes open-telemetry/opentelemetry-collector#4480

Signed-off-by: Juraci Paixão Kröhling [email protected]

[codeboten]

Should this PR wait until the 0.40.0 tag is completed in core?

[jpkrohling]

Should this PR wait until the 0.40.0 tag is completed in core?

This is the first step in the release doc, I suppose this is only to make sure the current collector core won't break contrib. It does say to get this reviewed/merged though :-)

https://github.com/open-telemetry/opentelemetry-collector/blob/main/docs/release.md#releasing-opentelemetry-collector

[codeboten]

🤔 somewhat surprised this broke the correctness tests

[codeboten]

🤔 somewhat surprised this broke the correctness tests

Ah i see, i missed this change: open-telemetry/opentelemetry-collector@62a6552

[jpkrohling]

I just added a new commit to this PR, fixing the change from GetStateChannel to GetState.

[codeboten]

Looks like the prometheus change broke the tests

panic: test timed out after 5m0s

goroutine 150178 [running]:
testing.(*M).startAlarm.func1()
	/opt/hostedtoolcache/go/1.17.3/x64/src/testing/testing.go:1788 +0xbb
created by time.goFunc
	/opt/hostedtoolcache/go/1.17.3/x64/src/time/sleep.go:180 +0x4a

[jpkrohling]

True, I just restarted the test thinking it was a flaky test, but I need to look deeper into this.

[jpkrohling]

I fixed the Prometheus tests and a couple of missing go.mod entries for items in this repo (Memcached, for instance). The other changes are made by the steps listed in the release procedure. Given that I've had approval by @codeboten already, I'm merging this to proceed with the release.

[mx-psi]

Just saw your message on Slack, wanted to say it looks good even if already merged :)

[jpkrohling]

Thanks! I wasn't sure someone was working today :-)