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Ruben S. Montero
c91f8a1c12
- Add suport for delete snapshots in the middle of the chain in qcow2
(ALLOW_ORPHANS=NO). Example, snapshot 2 below:
0 <- 1 <- 2 <- 3
- It supports removing the last snapshot and active (blockpull) and
first one (snapshot 0). The first snapshot cannot be deleted in
persistent images because of the underlying link setting.
- Snapshots are deleted by blockcommit. For example to delete 2, 3 is
committed into 2:
0 <- 1 <- 2: (2+3)
A new file 3.current is created in the filesystem to look for the
actual file name supporting snapshot 3.
- qcow2/shared operations snap_delete, snap_revert and cpds
(disk-saveas) has been updated to react to the .current files
- The kvm/deploy action has been updated to resolve links in source file
attributes. This is needed so the <backingStore> of the libvirt domain
does not contain the sysmlinks that changes on the revert/create
operations.
- Snapshots with more than 1 child (or their relatives) cannot be deleted to not
break backing chains.
- It has been found that the snap-delete operation in suspend state is
insecure as the guest caches may not be updated accordingly. The
operation is now not allowed in this state.
- The associated state has been removed from oned. It needs to be
removed in CLI/Sunstone and APIs
- The changes are for VM disk-snapshots. A similar update can be made
for images in the datastore/fs snap_delete action. This operation is
not implemented in this commit.