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Fix descriptor lock release logic for block volume unmapDevice

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Fixes: #69114
This commit is contained in:
Masaki Kimura
2018-09-26 19:56:58 +00:00
parent c1ad6e961a
commit 3d808540df
4 changed files with 21 additions and 87 deletions
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22
pkg/volume/fc/fc_util.go
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@@ -30,7 +30,6 @@ import (
"k8s.io/kubernetes/pkg/features"
"k8s.io/kubernetes/pkg/volume"
volumeutil "k8s.io/kubernetes/pkg/volume/util"
"k8s.io/kubernetes/pkg/volume/util/volumepathhandler"
)
type ioHandler interface {
@@ -348,25 +347,11 @@ func (util *FCUtil) DetachBlockFCDisk(c fcDiskUnmapper, mapPath, devicePath stri
}
glog.V(4).Infof("fc: find destination device path from symlink: %v", dstPath)
// Get loopback device which takes fd lock for device beofore detaching a volume from node.
// TODO: This is a workaround for issue #54108
// Currently local attach plugins such as FC, iSCSI, RBD can't obtain devicePath during
// GenerateUnmapDeviceFunc() in operation_generator. As a result, these plugins fail to get
// and remove loopback device then it will be remained on kubelet node. To avoid the problem,
// local attach plugins needs to remove loopback device during TearDownDevice().
var devices []string
blkUtil := volumepathhandler.NewBlockVolumePathHandler()
dm := c.deviceUtil.FindMultipathDeviceForDevice(dstPath)
if len(dm) != 0 {
dstPath = dm
}
loop, err := volumepathhandler.BlockVolumePathHandler.GetLoopDevice(blkUtil, dstPath)
if err != nil {
if err.Error() != volumepathhandler.ErrDeviceNotFound {
return fmt.Errorf("fc: failed to get loopback for destination path: %v, err: %v", dstPath, err)
}
glog.Warningf("fc: loopback for destination path: %s not found", dstPath)
}
// Detach volume from kubelet node
if len(dm) != 0 {
@@ -388,13 +373,6 @@ func (util *FCUtil) DetachBlockFCDisk(c fcDiskUnmapper, mapPath, devicePath stri
glog.Errorf("fc: last error occurred during detach disk:\n%v", lastErr)
return lastErr
}
if len(loop) != 0 {
// The volume was successfully detached from node. We can safely remove the loopback.
err = volumepathhandler.BlockVolumePathHandler.RemoveLoopDevice(blkUtil, loop)
if err != nil {
return fmt.Errorf("fc: failed to remove loopback :%v, err: %v", loop, err)
}
}
return nil
}