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rbd: protect against concurrent gRPC calls

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The timeout value in external-provisioner is fairly low. It's not
uncommon that it times out and retries before the rbdplugin is done
with CreateVolume. rbdplugin has to serialize calls and ensure that
they are idempotent to deal with this.
This commit is contained in:
Patrick Ohly
2018-10-17 14:52:45 +02:00
committed by Huamin Chen
parent 188cdd1d68
commit 403cad682c
3 changed files with 29 additions and 2 deletions
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12
pkg/rbd/rbd_util.go
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@ -75,7 +75,19 @@ type rbdSnapshot struct {
}
var (
// serializes operations based on "<rbd pool>/<rbd image>" as key
attachdetachMutex = keymutex.NewKeyMutex()
// serializes operations based on "volume name" as key
volumeNameMutex = keymutex.NewKeyMutex()
// serializes operations based on "volume id" as key
volumeIDMutex = keymutex.NewKeyMutex()
// serializes operations based on "snapshot name" as key
snapshotNameMutex = keymutex.NewKeyMutex()
// serializes operations based on "snapshot id" as key
snapshotIDMutex = keymutex.NewKeyMutex()
// serializes operations based on "mount target path" as key
targetPathMutex = keymutex.NewKeyMutex()
supportedFeatures = sets.NewString("layering")
)