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This change supports robust kubelet volume cleanup

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Currently kubelet volume management works on the concept of desired
and actual world of states. The volume manager periodically compares the
two worlds and perform volume mount/unmount and/or attach/detach
operations. When kubelet restarts, the cache of those two worlds are
gone. Although desired world can be recovered through apiserver, actual
world can not be recovered which may cause some volumes cannot be cleaned
up if their information is deleted by apiserver. This change adds the
reconstruction of the actual world by reading the pod directories from
disk. The reconstructed volume information is added to both desired
world and actual world if it cannot be found in either world. The rest
logic would be as same as before, desired world populator may clean up
the volume entry if it is no longer in apiserver, and then volume
manager should invoke unmount to clean it up.
This commit is contained in:
Jing Xu
2016-06-23 12:46:21 -07:00
parent 936c5171a5
commit f19a1148db
46 changed files with 999 additions and 247 deletions
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5
pkg/util/mount/mount_linux.go
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@@ -222,6 +222,11 @@ func pathIsDevice(pathname string) (bool, error) {
return false, nil
}
//GetDeviceNameFromMount: given a mount point, find the device name from its global mount point
func (mounter *Mounter) GetDeviceNameFromMount(mountPath, pluginDir string) (string, error) {
return getDeviceNameFromMount(mounter, mountPath, pluginDir)
}
func listProcMounts(mountFilePath string) ([]MountPoint, error) {
hash1, err := readProcMounts(mountFilePath, nil)
if err != nil {