mirror of https://github.com/apache/cloudstack.git
b8d069e127
Adds the delete-with-chain-repair semantics agreed in the RFC review:
scripts/vm/hypervisor/kvm/nasbackup.sh
- New '-o rebase' operation: rebases an existing on-NAS qcow2 onto
a new backing parent. Uses a SAFE rebase (no -u) so the target
absorbs blocks of the about-to-be-deleted parent before the
backing pointer is moved up to the grandparent. Writes the new
backing reference relative to the target's directory so it
survives mount-point changes.
- New CLI flags --rebase-target, --rebase-new-backing (both passed
mount-relative).
RebaseBackupCommand + LibvirtRebaseBackupCommandWrapper
- New agent command that wraps the script's rebase operation. The
provider sends one of these per child that needs re-pointing.
NASBackupProvider.deleteBackup
- Now plans the chain repair before touching files via
computeChainRepair():
* No chain metadata -> single-file delete (legacy behaviour)
* Tail incremental -> single delete, no rebase
* Middle incremental -> rebase immediate child onto our
parent, then delete; shift
chain_position of all later
descendants by -1
* Full with descendants -> refuse unless forced=true; with
forced=true delete full + every
descendant newest-first
- Updates parent_backup_id, chain_position metadata in
backup_details after each rebase so the model in the DB matches
the on-disk chain.
This implements the cascade-delete behaviour requested in @abh1sar's
review point #7.
Refs: apache/cloudstack#12899
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