mirror of
https://github.com/cozystack/cozystack.git
synced 2026-10-27 23:27:58 +09:00
Aleksei Sviridkin
e05c56524e
## What this PR does Closes the uncovered VM backup path from #3236. `hack/e2e-chainsaw/backup/` held only a disabled Chainsaw port of the old `backup.bats`, written against the retired API (`kind: VirtualMachine`, `BackupJob.storageRef`/`strategyRef`, `velero-strategy-default`), so it guarded nothing. This removes it, fixes the in-place restore of a standalone VMDisk in the backup controller, and adds two real round-trips in the `vminstance` suite that drive the `examples/backups/{vmi,vmdisk}` scripts, so the documented demo and the automated test stay in step. ### Controller: standalone VMDisk in-place restore `collectUnderlyingResources` in `internal/backupcontroller/velerostrategy_controller.go` returned nothing for any kind but VMInstance, so `prepareForRestore` did nothing for a standalone VMDisk: no HelmRelease suspend, no DataVolume delete, no `keepOriginalPVC` rename. An in-place VMDisk restore then raced Flux and CDI over the PVC name the data mover was repopulating. A standalone VMDisk now reports its own disk as its underlying resource, so the restore preparation already used for VMInstance disks suspends the `vm-disk-<name>` HelmRelease, deletes its DataVolume and renames the live PVC to `<name>-orig-<hash>` before Velero recreates it. Unit tests cover both the VMDisk and the VMInstance branch. A VMInstance is halted before its disks are touched, but a VMDisk target is not, and every VMInstance disk is a VMDisk. Renaming the PVC of a disk that a running VM mounts would leave the original `Terminating` behind `pvc-protection`; Velero's PVC restore action skips a PVC that still exists, so the RestoreJob would report `Succeeded` having moved nothing, and the VM would lose its disk on the next restart. An in-place VMDisk restore therefore fails before changing anything when a Pod that has not terminated mounts the disk's PVC. The message names the Pod and tells the user to stop the VM or restore the VMInstance instead. `TestPrepareForRestore_VMDiskInUse` covers a running mounting Pod (refused, PVC not renamed, HelmRelease not suspended), a finished Pod, a Pod on another disk, and a VMInstance target whose own launcher Pod must not refuse it. A VMDisk Backup taken before the disk was recorded as its underlying resource has none, so the disk is derived from the application name (`vm-disk-<name>`): such a restore is prepared and checked for a mounting Pod too. The per-disk `orLabelSelectors` stay a VMInstance concern: a VMDisk strategy already selects its disk, and Velero rejects a Backup or Restore carrying both `labelSelector` and `orLabelSelectors`, so appending them for a VMDisk would break a strategy written with `labelSelector`. When an in-place restore fails after preparation, nothing is rolled back. Resuming the disk's HelmRelease while its PVC is renamed and its DataVolume deleted would have CDI import a fresh disk under the original name, which looks healthy and hides that the data sits in the `-orig-` PVC. The failure message and a Warning event instead name the HelmReleases preparation suspended and the `-orig-` PVCs holding the original data, read back from the cluster so that a failure before a step ran does not name what it would have left, and say that a HelmRelease Velero already restored is resumed, so the disk has to be checked; `examples/backups/vmdisk/README.md` describes the recovery. Tests cover both selector paths, the pre-upgrade Backup, a failed Pod list (the restore requeues and suspends nothing), and all three failures after preparation: a `PartiallyFailed` Velero Restore, several Restores owning the job, and a Restore that cannot be created. Because preparation takes the target apart before Velero validates the Restore, the RestoreJob is refused before preparation, with nothing changed, when the Velero Backup is gone (expired or deleted) or not `Completed`. This is the same single check #4672 added, now run on every pass behind the preparation failure path, so a Backup that expires after preparation started names the leftovers too. A Velero Restore that ends in `FailedValidation` fails the RestoreJob like `Failed`, with Velero's validation errors and the leftovers in the message, instead of polling forever. A HelmRelease suspend or a VM halt that does not happen now stops preparation (requeue) rather than letting the rename and DataVolume delete run under a live release or VM, and a VMInstance's disks are renamed only once no Pod mounts them. A VMDisk held only by a Pod already being deleted is waited for rather than refused, for up to 30 minutes after the RestoreJob started, so a Pod stuck terminating on a lost node fails the job instead of keeping it `Running`. Each of these is pinned by a test that turns red when the guard is removed. Between renaming a kept disk's PVC and deleting its DataVolume, CDI can recreate an empty PVC under the original name for the still-present DataVolume. Velero then skips that PVC as already present ("PVC already exists. Skip restore this PVC."), the RestoreJob reports `Succeeded`, and the VM boots a blank disk. The round-trip's new DataDownload check caught this on a VMInstance restore, where the uid, label and `-orig-` checks had all passed. Once the DataVolume is gone (the wait #4672 added), preparation now deletes a PVC found under the original name (read uncached) before the Velero Restore is created; `TestPrepareForRestore_ClearsPVCRecreatedAfterRename` reproduces the recreation inside the DataVolume delete. Preparation spans several reconciles, so the RestoreJob records a `PreparationStarted` condition before it first changes the target; if recording it fails, preparation retries without changing anything, so a later failure cannot report leftovers that were never made. A refusal on a later pass (the Velero Backup expired, a VM started on the disk) then names what preparation left behind instead of saying nothing was changed, and a preparation still waiting 30 minutes after it started fails the same way instead of polling forever. The vmdisk script starts its consumer Pod only on a PVC that carries the restore label, so it cannot pin a PVC CDI recreated in the rename window. Now that a VMDisk target is prepared, `keepOriginalPVC: false` reaches it as well. Its DataVolume is deleted with orphan propagation, and the bound PVC is deleted and waited for before the Restore (the path #4672 added for VMInstance disks). Left in place, Velero would skip the PVC and the CDI webhook would refuse the DataVolume the resumed HelmRelease creates, leaving the disk's HelmRelease stuck. `TestPrepareForRestore_VMDiskWithoutKeepDeletesOriginalPVC` pins it. ### `vminstance-2-backup-roundtrip` (un-gated in CI) A tiny cirros guest (`u1.nano`, 2Gi, in-place restore only) runs the current API end to end: Velero strategy, BackupClass, a booted VMInstance, an ad-hoc `BackupJob` and an in-place `RestoreJob`, each waited to `Succeeded` and failing fast on `Failed`. The VM must come back `Running`, and its disk PVC must have been created by the restore: a new `metadata.uid`, Velero's `velero.io/restore-name` label, and the `vm-disk-<name>-orig-<hash>` PVC that the rename leaves behind. The label alone does not prove the data moved, because with `existingResourcePolicy: update` Velero also stamps it on a PVC it only patched, and the patch path never reaches the data mover. An in-guest signal is not available on this platform: the KubeVirt CR disables serial-console logging cluster-wide and cirros ships no qemu-guest-agent. ### `vmdisk-2-backup-roundtrip` (un-gated in CI) The disk-only companion: import a 5Gi Ubuntu disk, back it up, restore it in place relying on the controller fix above, and require the same three signals (new uid, restore label, `-orig-` PVC), a `Completed` DataDownload for the restore that wrote bytes, and a Ready HelmRelease. On a `WaitForFirstConsumer` StorageClass, such as the `local` class the CI lane uses, the Velero data mover waits until a scheduled Pod has selected a node for the restored PVC (`WaitPVCConsumed` in Velero's generic restore exposer). A VMInstance gets that from its virt-launcher Pod; a detached disk has none, so its `RestoreJob` stays `Running` until the 30m data-mover prepare timeout fails it. The script therefore starts a restricted-profile `pause` Pod on the new PVC once Velero has created it, standing in for the VM that would attach the disk, and removes it after the restore. `examples/backups/vmdisk/README.md` documents this for operators restoring a detached disk. ### Harness details - The disk `storageClass` is an override (default `replicated`). The Chainsaw steps pass the lane's `COZY_E2E_STORAGE_CLASS` (`local` on the DRBD-off PR gate). - Each harness stands up a throwaway in-cluster BSL (`cozy-e2e-vmi`/`cozy-e2e-vmdisk`) at `seaweedfs-s3.tenant-root:8333` with `insecureSkipTLSVerify` and `checksumAlgorithm: ""` (the #3236 fixes), reusing the platform bucket and `cozy-backups-creds` under a distinct prefix, because the platform `cozy-default` BSL derives the external S3 ingress endpoint, unroutable in the CI cluster. - The script waits are bounded so that their worst case stays under the 40m op timeout (38m for the VMDisk step), and a hung wait trips the script's own named timeout rather than a bare `signal: killed`. - On failure, `catch` also describes the Velero `Restore`, `DataDownload` and `DataUpload` objects in `cozy-velero`. - `skipDelete` plus a `finally` that resumes the suspended HelmReleases, reclaims the `-orig-` PVC and its LINSTOR volume (the PV is flipped back to `Delete` first), and drains the Velero backups on the throwaway BSL, branching on kubectl's exit status, before deleting it. When the drain is not confirmed, the BSL is kept and the step fails, so the Velero Backups are not orphaned behind a green step. - HelmRelease waits use the shared `wait_hr_ready`, which fails fast on `Stalled`. After the VMDisk restore the script first waits for `observedGeneration` to reach the restored spec's `generation`, because the `Ready=True` from before the suspend would otherwise satisfy the wait at once. The `vmi` example is CI-drivable: `run-all.sh`/`cleanup.sh` are non-interactive, the VM is waited to boot before the backup, `volumeSnapshotLocations` is dropped from the demo strategies (`snapshotMoveData` routes data through the BSL), and `BACKUP_STORAGE_LOCATION` defaults to `cozy-default`. `select-e2e.sh` maps `examples/backups/{vmi,vmdisk}` edits to the `vminstance` suite, except `07-restore-to-copy.sh`, which the suite skips (`SKIP_RESTORE_TO_COPY=1`) and so stays docs-only. A `packages/system/velero` change selects the `vminstance` suite as well, since these are the only Tests that run a Velero backup and restore. ### Screenshots N/A — no UI changes. ### Downstream repositories Walked the trigger map in `docs/agents/contributing.md` against the diff (backup controller restore preparation for VMDisk, shell scripts under `examples/backups/`, Chainsaw tests, `hack/select-e2e.sh` routing, a deleted stale suite, one doc line): no `packages/apps|extra` add/rename, no `values.schema.json`/enum/default changes, no CRD/ApplicationDefinition/label/annotation/namespace/metric changes. The controller change alters what a VMDisk `RestoreJob` does in the cluster, not any API surface a downstream repository consumes. `cozystack/examples` holds Terraform for bare nodes, unrelated to the in-repo `examples/` tree. - [x] No downstream repository is affected by this change - [ ] [cozystack/website](https://github.com/cozystack/website) - follow-up: - [ ] [cozystack/terraform-provider-cozystack](https://github.com/cozystack/terraform-provider-cozystack) - follow-up: - [ ] [cozystack/ansible-cozystack](https://github.com/cozystack/ansible-cozystack) - follow-up: - [ ] [cozystack/ccp](https://github.com/cozystack/ccp) - follow-up: - [ ] [cozystack/talm](https://github.com/cozystack/talm) - follow-up: - [ ] [cozystack/cozyhr](https://github.com/cozystack/cozyhr) - follow-up: - [ ] [cozystack/cozy-proxy](https://github.com/cozystack/cozy-proxy) - follow-up: - [ ] [cozystack/cozystack-telemetry-server](https://github.com/cozystack/cozystack-telemetry-server) - follow-up: - [ ] [cozystack/external-apps-example](https://github.com/cozystack/external-apps-example) - follow-up: - [ ] [cozystack/examples](https://github.com/cozystack/examples) - follow-up: ### Release note ```release-note fix(backups): an in-place RestoreJob for a standalone VMDisk now suspends the disk's HelmRelease, deletes its DataVolume and (with keepOriginalPVC) renames the original PVC before Velero restores it, instead of racing Flux and CDI over the same PVC; without keepOriginalPVC the original PVC is deleted so Velero recreates it from the backup. Such a restore fails before changing anything when a running Pod, such as the launcher of a VM that uses the disk, mounts the disk's PVC: stop the VM or restore the VMInstance instead. If such a restore fails after the disk was prepared, its message and a Warning event name the HelmRelease preparation suspended and the PVC holding the original data. On a WaitForFirstConsumer StorageClass the data mover still starts only once a Pod consumes the restored PVC, for example when the disk is attached to a VMInstance. An in-place restore with keepOriginalPVC no longer reports Succeeded over an empty PVC that CDI recreated under the disk's name while the original was being kept aside. Adds Chainsaw backup/restore round-trips for VMInstance and standalone VMDisk that run a real Velero backup and restore in CI. ```