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make rm command more robust with addition check #413
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Signed-off-by: Chanwit Kaewkasi <chanwit@gmail.com>
stealthybox
approved these changes
Sep 9, 2019
| if err := cleanup.DeactivateSnapshot(vm); err != nil { | ||
| return err | ||
| // After remove the VM container, and the SnapshotDev still there | ||
| if _, err := os.Stat(vm.SnapshotDev()); err == nil { |
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The fact that we have to do this is a code-smell.
I have a feeling we need to look at how we store vm state.
It's a bit weird that we could run this Cleanup function and not know whether there is a container or snapshot to delete.
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indeed.
we need to take a look into the mechanism of the vm removal process.
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Snapshot dev leak happens randomly after
rm -f, but sometime it won't.The default behavior of
rm -fworks mostly correct. So that the snapshot dev will be removed afterRemoveVMContainer. However, there are some glitches reported by #365 and we merged #381 to fix it.Unfortunately, cleanup in PR #381 add an extra step. If the
RemoveVMContainerworks correctly, there's no mapping device left to remove. So an error occurred andrm -freturned non-zero. This PR adds more check to correct that behavior.Signed-off-by: Chanwit Kaewkasi chanwit@gmail.com