43924b1d45
Automatic merge from submit-queue (batch tested with PRs 58319, 58345). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>. Call Dial in blocking mode **What this PR does / why we need it**: # Tests which uncover underlying problem On the current master code: 1. comment out stub plugin server start [here](https://github.com/kubernetes/kubernetes/blob/master/pkg/kubelet/cm/deviceplugin/endpoint_test.go#L127-L128) 2. run `go test -v k8s.io/kubernetes/pkg/kubelet/cm/deviceplugin --run TestNewEndpoint --count 1`. Test succeeds. 3. run `go test -v k8s.io/kubernetes/pkg/kubelet/cm/deviceplugin --run TestRun --count 1`. Test hangs with: > listAndWatch ended unexpectedly for device plugin mock with error rpc error: code = Unavailable desc = grpc: the connection is unavailable `2` does not fail even though it invokes Dial and no listening server is running. It is because currently Dial is not waiting till the connection turns to Ready state. And this case does not invokes any RPC call over the `conn` returned by `Dial` `3` hangs because this tests involves actual usage of `conn`(client) and there it does not find listening server because we dint start and deliberately stopped in `1`. `Dial` should be using `WithBlock` option which ensures that `conn` is returned only when connection is in `Ready` state. After using `WithBlock` in the `Dial`, in this PR, if `1`, `2` and `3` are repeated. Both, `2` and `3`, fails at `Dial`, which is expected behavior. By `fail`, I meant Dial blocks forever if `WithTimeout` is not used or otherwise, a timeout failure. **Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*: Fixes #58281 **Special notes for your reviewer**: **Release note**: ```release-note None ``` /area hw-accelerators /sig node /cc @jiayingz @RenaudWasTaken @vishh @ScorpioCPH @sjenning @derekwaynecarr @jeremyeder @lichuqiang @tengqm |
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Kubernetes
Kubernetes is an open source system for managing containerized applications across multiple hosts, providing basic mechanisms for deployment, maintenance, and scaling of applications.
Kubernetes builds upon a decade and a half of experience at Google running production workloads at scale using a system called Borg, combined with best-of-breed ideas and practices from the community.
Kubernetes is hosted by the Cloud Native Computing Foundation (CNCF). If you are a company that wants to help shape the evolution of technologies that are container-packaged, dynamically-scheduled and microservices-oriented, consider joining the CNCF. For details about who's involved and how Kubernetes plays a role, read the CNCF announcement.
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See our documentation on kubernetes.io.
Try our interactive tutorial.
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If you want to build Kubernetes right away there are two options:
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$ go get -d k8s.io/kubernetes
$ cd $GOPATH/src/k8s.io/kubernetes
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