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fix timeout when stopping KVM machine with CRI-O container runtime #19758

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@prezha prezha commented Oct 7, 2024

we noticed in our integration tests that kvm machine with cri-o container runtime will sometime not gracefully shutdown waiting a given time of two minutes (eg: https://storage.googleapis.com/minikube-builds/logs/19736/36442/KVM_Linux_crio.html#fail_TestStartStop%2fgroup%2fembed-certs%2fserial%2fStop)

there is a known upstream issue that is tracking that

as we had similar issues in the past (and increased the timeout value several times), this pr aims to solve that problem by:

  • waiting initial 90 seconds for the kvm machine to gracefully stop, and if that fails, instead of terminating with error:
  • requesting a forceful shutdown (ie, "destroy" in libvirt) and waiting for another 30 seconds

in total, this should: self-resolve the issue in many cases, while reducing the total wait period

bonus:

  • ensure any error from trying to close connection/domain is caught and logged but does not overwrite the underlying error
  • more consistent error handling
  • more consistent logging

@k8s-ci-robot k8s-ci-robot added cncf-cla: yes Indicates the PR's author has signed the CNCF CLA. size/L Denotes a PR that changes 100-499 lines, ignoring generated files. labels Oct 7, 2024
@k8s-ci-robot k8s-ci-robot added the approved Indicates a PR has been approved by an approver from all required OWNERS files. label Oct 7, 2024
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prezha commented Oct 7, 2024

/ok-to-test

@k8s-ci-robot k8s-ci-robot added the ok-to-test Indicates a non-member PR verified by an org member that is safe to test. label Oct 7, 2024
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Hi @prezha, following up on this according to cri-o/cri-o#8609 (comment), this was fixed in crun 1.17. We've updated to crun 1.17 in #19640, is this PR still needed?

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prezha commented Oct 25, 2024

hey @spowelljr, i think we do as we've occasionally seen these timeouts even before (for reasons related to other/different issues), so it would also reduce the flakiness of our integration tests

pkg/drivers/kvm/kvm.go Outdated Show resolved Hide resolved
pkg/drivers/kvm/kvm.go Outdated Show resolved Hide resolved
}

if d.ExtraDisks > 20 {
// Limiting the number of disks to 20 arbitrarily. If more disks are
// needed, the logical name generation has to changed to create them if
// the form hdaa, hdab, etc
return errors.Wrap(err, "cannot create more than 20 extra disks")
return errors.New("creating more than 20 extra disks")
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The before message is a better user facing error, cannot create vs creating, although we should have validation for this way before

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agree, reworded it

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kvm2 driver with docker runtime

+----------------+----------+---------------------+
|    COMMAND     | MINIKUBE | MINIKUBE (PR 19758) |
+----------------+----------+---------------------+
| minikube start | 52.5s    | 51.2s               |
| enable ingress | 18.4s    | 18.0s               |
+----------------+----------+---------------------+

Times for minikube ingress: 16.6s 19.1s 19.6s 19.5s 17.1s
Times for minikube (PR 19758) ingress: 18.6s 16.6s 19.1s 19.1s 16.6s

Times for minikube start: 52.2s 53.5s 49.5s 52.9s 54.3s
Times for minikube (PR 19758) start: 51.5s 54.4s 49.8s 48.3s 51.9s

docker driver with docker runtime

+----------------+----------+---------------------+
|    COMMAND     | MINIKUBE | MINIKUBE (PR 19758) |
+----------------+----------+---------------------+
| minikube start | 23.6s    | 24.0s               |
| enable ingress | 13.0s    | 12.8s               |
+----------------+----------+---------------------+

Times for minikube start: 24.7s 24.4s 21.6s 22.4s 25.0s
Times for minikube (PR 19758) start: 24.7s 22.3s 25.2s 22.4s 25.3s

Times for minikube ingress: 13.8s 12.3s 12.9s 13.3s 12.8s
Times for minikube (PR 19758) ingress: 13.3s 12.4s 13.3s 12.3s 12.9s

docker driver with containerd runtime

+----------------+----------+---------------------+
|    COMMAND     | MINIKUBE | MINIKUBE (PR 19758) |
+----------------+----------+---------------------+
| minikube start | 23.1s    | 21.3s               |
| enable ingress | 28.8s    | 33.2s               |
+----------------+----------+---------------------+

Times for minikube start: 23.0s 21.2s 23.9s 22.8s 24.6s
Times for minikube (PR 19758) start: 20.6s 20.8s 20.9s 21.0s 23.2s

Times for minikube ingress: 22.8s 31.8s 27.8s 22.8s 38.8s
Times for minikube (PR 19758) ingress: 28.9s 30.8s 38.8s 38.8s 28.8s

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Found a typo, but the tests look good!

}

return fmt.Errorf("unable to stop vm, current state %q", s.String())
return s, fmt.Errorf("timed out waitig for domain %s, current state is %q", method, s)
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Suggested change
return s, fmt.Errorf("timed out waitig for domain %s, current state is %q", method, s)
return s, fmt.Errorf("timed out waiting for domain %s, current state is %q", method, s)

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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: prezha, spowelljr

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Here are the number of top 10 failed tests in each environments with lowest flake rate.

Environment Test Name Flake Rate
Docker_Linux_containerd_arm64 (1 failed) TestFunctional/parallel/MountCmd/specific-port(gopogh) 0.00% (chart)
KVM_Linux (1 failed) TestFunctional/parallel/MountCmd/specific-port(gopogh) 0.00% (chart)

Besides the following environments also have failed tests:

To see the flake rates of all tests by environment, click here.

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