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[guest-example-hookscript.pl, abstractconfig.pm] Subject: Re: [pve-devel] [PATCH-SERIES guest-common/docs v3] add pre/post/failed snapshot hooks X-BeenThere: pve-devel@lists.proxmox.com X-Mailman-Version: 2.1.29 Precedence: list List-Id: Proxmox VE development discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 23 Jan 2023 16:08:05 -0000 On 1/23/23 16:58, Stefan Hanreich wrote: > This patch series introduces the pre/post/failed-snapshot hooks that run before/ > after a snapshot is taken, or after failing to take a snapshot. > > I used the new example script from pve-docs as template for my test hookscripts. > > What I tested: > * Normal snapshotting, without VM state, without hookscript > * snapshot works, no hooks executed > * Normal snapshotting, with VM state, without hookscript > * snapshot works, no hooks executed > * Normal snapshotting, without VM state, with hookscript > * snapshot works, pre/post hooks work > * Normal snapshotting, with VM state, with hookscript > * snapshot works, pre/post hooks work > * Taking snapshot with existing name, with hookscript > * fails, no hookscripts get executed > * Failed at wrong storage config, with hookscript > * pre/failed get executed, lock gets released > * Failed at taking RAM Snapshot (simulated with monkey-patched die), with hookscript > * pre/failed get executed, lock gets released > * pre/post hookscript that detaches/attaches unsnapshottable disk (without --skiplock) > * snapshotting fails, attach/detach fails, pre/failed get executed, lock released > * pre/post hookscript that detaches/attaches unsnapshottable disk (with --skiplock) > * snapshotting works, attach/detach works, pre/post get executed > * restoring works, detached disk is detached after restoring > * pre-snapshot hookscript exits with code > 0 > * pre/failed-snapshot get executed, snapshot fails, lock gets released > * post-snapshot hookscript exits with code > 0 > * pre/post/failed-snapshot get executed, snapshot fails, lock gets released > * Taking snapshot of template > * fails, no hookscripts get executed > * execute commands in VM in pre/post via qm guest exec > * snapshot succeeds, commands get executed, pre/post executed > > Changes from v2 (thanks fabian!): > * added guards, so cfs_update() only gets called when necessary > * added PVE_SNAPSHOT_PHASE envvar to failed-snapshot as indicator > when the failure occured > > Changes from v1: > * added failed-snapshot hook that runs after a failed snapshot > * this enables users to revert any changes made in pre-snapshot hooks > in case of errors > * running cfs_update() after every hookscript invocation > * adjusted the call sites of exec_hookscript() > * particularly interesting for pre-snapshot since some checks now run > before the hook runs > * VM/CT config is now locked during hookscript execution > > Thanks to Fiona and Fabian for their valuable input/help! > > pve-guest-common: > flipped this heading with pve-docs > Stefan Hanreich (1): > examples: add pre/post/failed-snapshot hooks to example hookscript > > examples/guest-example-hookscript.pl | 26 ++++++++++++++++++++++++++ > 1 file changed, 26 insertions(+) > > > pve-docs: ^ see above > > Stefan Hanreich (1): > partial fix #2530: snapshots: add pre/post/failed-snapshot hooks > > src/PVE/AbstractConfig.pm | 76 +++++++++++++++++++++++++++++++++++---- > 1 file changed, 70 insertions(+), 6 deletions(-) >