controller-runtime
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kubernetes-sigs
:bug: Panic in `APIServer.Stop` when `Authn == nil`
After a test using this repo which failed with an error like
ERROR controller-runtime.test-env unable to start the controlplane {"tries": 4, "error": "timeout waiting for process etcd to start successfully (it may have failed to start, or stopped unexpectedly before becoming ready)"}
sigs.k8s.io/controller-runtime/pkg/envtest.(*Environment).startControlPlane
~/go/pkg/mod/sigs.k8s.io/[email protected]/pkg/envtest/server.go:330
sigs.k8s.io/controller-runtime/pkg/envtest.(*Environment).Start
~/go/pkg/mod/sigs.k8s.io/[email protected]/pkg/envtest/server.go:260
…
I saw a further error
Test Panicked
runtime error: invalid memory address or nil pointer dereference
Full Stack Trace
sigs.k8s.io/controller-runtime/pkg/internal/testing/controlplane.(*APIServer).Stop(0x14)
~/go/pkg/mod/sigs.k8s.io/[email protected]/pkg/internal/testing/controlplane/apiserver.go:425 +0x8f
sigs.k8s.io/controller-runtime/pkg/internal/testing/controlplane.(*ControlPlane).Stop(0xc00001a000)
~/go/pkg/mod/sigs.k8s.io/[email protected]/pkg/internal/testing/controlplane/plane.go:87 +0x3d
sigs.k8s.io/controller-runtime/pkg/envtest.(*Environment).Stop(0xc00001a000)
~/go/pkg/mod/sigs.k8s.io/[email protected]/pkg/envtest/server.go:194 +0x114
…
This seems to be similar to #1724 (merged toward 0.11.0). Maybe related to #1750?
Untested (not known how to reproduce the original error with etcd).
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Hi @jglick. Thanks for your PR.
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It looks to me like a side-effect of a more concerning bug. Why is it even nil?
The documentation says there should be a default value if it's empty https://github.com/kubernetes-sigs/controller-runtime/blob/master/pkg/internal/testing/controlplane/apiserver.go#L51
This line configures it if it is empty https://github.com/kubernetes-sigs/controller-runtime/blob/5636d975d88e2072884fd82c75b5d3bacf274919/pkg/internal/testing/controlplane/apiserver.go#L264
@DirectXMan12 I think you wrote this, can you help us clarify?
This is just a side effect of some other (properly reported) error: there is code which tries to clean up by stopping a service which in this case had not been fully initialized.
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@jglick you should make the test pass in order for us to merge it. maybe try to rebase?
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Rebased as suggestion. https://prow.k8s.io/view/gs/kubernetes-jenkins/pr-logs/pull/kubernetes-sigs_controller-runtime/1785/pull-controller-runtime-test-master/1485692352398888960 is opaque to me.
Can we add a test case as well?
Probably above my skill level.
There isn't much of a point in merging a fix without a test, the next change might just break it again.
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/close
@k8s-triage-robot: Closed this PR.
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If somebody else lands on this page when running controller when following this guide https://book.kubebuilder.io/reference/envtest.html. For me the issue was because cfg, err = testEnv.Start() returned the error missing of missing /usr/local/kubebuilder/bin/etcd binary. We solved it by setting the binary using the env variable:
KUBEBUILDER_ASSETS=__PROJECT_PATH__/bin/k8s/1.25.0-linux-amd64
