This fixes a test flake:
[sig-node] DRA [Feature:DynamicResourceAllocation] multiple nodes reallocation [It] works
/nvme/gopath/src/k8s.io/kubernetes/test/e2e/dra/dra.go:552
[FAILED] number of deallocations
Expected
<int64>: 2
to equal
<int64>: 1
In [It] at: /nvme/gopath/src/k8s.io/kubernetes/test/e2e/dra/dra.go:651 @ 09/05/23 14:01:54.652
This can be reproduced locally with
stress -p 10 go test ./test/e2e -args -ginkgo.focus=DynamicResourceAllocation.*reallocation.works -ginkgo.no-color -v=4 -ginkgo.v
Log output showed that the sequence of events leading to this was:
- claim gets allocated because of selected node
- a different node has to be used, so PostFilter sets
claim.status.deallocationRequested
- the driver deallocates
- before the scheduler can react and select a different node,
the driver allocates *again* for the original node
- the scheduler asks for deallocation again
- the driver deallocates again (causing the test failure)
- eventually the pod runs
The fix is to disable allocations first by removing the selected node and then
starting to deallocate.
6f9140e421