kubernetes/kubernetes
Enforce ReadWriteOnce PVC access mode during scheduling
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#103,305 opened on 2021/06/29
help wantedkind/featurelifecycle/staleneeds-triagesig/schedulingsig/storage
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説明
What would you like to be added: The ReadWriteOnce PVC access mode guarantees only the pods on a single node can access the provided PVC as a volume. This is enforced during volume attachment (in kube-controller-manager), and should be additionally enforced during scheduling.
Why is this needed: Because without it the scheduler will assign pods to nodes and they will fail to start (due to failed volume attachment).
Expected behavior:
When pod 1 is scheduled, if it uses a ReadWriteOnce PVC that's in use by a pod 2 running on node 1, then pod 1 can only be scheduled to node 1.
/sig scheduling /sig storage /cc @alculquicondor /cc @jsafrane