Bump Go to 1.25.0

[hwdef]

Part of: etcd-io/etcd#20518

[k8s-ci-robot]

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[hwdef]

@ivanvc
It looks like I need to update the version of golangci-lint in test-infra. Do you know how to do that? I haven't modified test-infra before. :)

[ivanvc]

Hey @hwdef, Prow (test-infra) is using the golangci-lint version defined in tools/mod:

etcd-operator/tools/mod/go.mod

Line 9 in e89aeb6

github.com/golangci/golangci-lint v1.64.8

[hwdef]

upgrade golangci-lint to v2:
remove typecheck: https://golangci-lint.run/docs/product/migration-guide/#typecheck
remove gosimple: https://golangci-lint.run/docs/product/migration-guide/#typecheck
migrate gofmt goimports: https://golangci-lint.run/docs/product/migration-guide/#linters-settings

[hwdef]

@ivanvc @ahrtr
It looks like I have to modify a lot of lint-related code. Is it better to create a new PR?

[ivanvc]

@ivanvc @ahrtr
It looks like I have to modify a lot of lint-related code. Is it better to create a new PR?

Yes, let's bump golangci-lint. It doesn't need or depend on Go 1.25.

[hwdef]

/retest

[k8s-ci-robot]

@hwdef: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
pull-etcd-operator-test	4fcc8ee	link	true	/test pull-etcd-operator-test

Full PR test history. Your PR dashboard. Please help us cut down on flakes by linking to an open issue when you hit one in your PR.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository. I understand the commands that are listed here.

[ivanvc]

I read the logs from the Prow job. Even though there are some warning logs, there doesn't seem to be any failed tests (looking for "FAIL"). I ran this locally by running go mod tidy; make test. The output is the same from the Prow job, but the exit status is zero.

Then, I ran the tests using pj-on-kind.sh (running ./config/pj-on-kind.sh pull-etcd-operator-test from the test-infra repository, then entering this pull request number). It does fail with the same error, but there are no test failures.

I'm investigating further.

[ivanvc]

It must be something in cert_manager, as it is failing just before it. Comparing logs from 1.24 (https://prow.k8s.io/view/gs/kubernetes-ci-logs/logs/post-etcd-operator-test/1962815493249175552)

...
coverage: 84.8% of statements
ok      go.etcd.io/etcd-operator/internal/etcdutils     154.430s        coverage: 84.8% of statements
        go.etcd.io/etcd-operator/pkg/certificate                coverage: 0.0% of statements
?       go.etcd.io/etcd-operator/pkg/certificate/auto   [no test files]
        go.etcd.io/etcd-operator/pkg/certificate/cert_manager           coverage: 0.0% of statements
?       go.etcd.io/etcd-operator/pkg/certificate/interfaces     [no test files]
        go.etcd.io/etcd-operator/test/utils             coverage: 0.0% of statements

vs. 1.25 (https://prow.k8s.io/view/gs/kubernetes-ci-logs/pr-logs/pull/etcd-io_etcd-operator/196/pull-etcd-operator-test/1962910352807038976#)

...
 ok  	go.etcd.io/etcd-operator/internal/etcdutils	153.646s	coverage: 84.8% of statements
?   	go.etcd.io/etcd-operator/pkg/certificate/auto	[no test files]
?   	go.etcd.io/etcd-operator/pkg/certificate/interfaces	[no test files]
make: *** [Makefile:67: test] Error 1 

Note that the warnings we're seeing in 1.25 are also present in 1.24.

[ahrtr]

Note that the warnings we're seeing in 1.25 are also present in 1.24.

But go 1.24 won't fail the workflow. cc @ArkaSaha30

[ivanvc]

But go 1.24 won't fail the workflow

One of the issues is that this is only reproducible in the kubekins image using Go 1.25. Running locally make test with Go 1.25 works fine.

[ivanvc]

I ran the tests for every module one by one, with the kubekins image, and I couldn't get it to fail 🤕

[ivanvc]

I found the issue. It wasn't very clear, but there are some log lines:

go: no such tool "covdata"

Which are the ones causing the issue. The problem was that the exit code and message weren't clear about it.

Reference: golang/go#75031

The solution (and confirmed by me in the kubekins image with pj-on-kind.sh) is to set the GOTOOLCHAIN environment variable to go1.25.0.

Related to: etcd-io/etcd#20576