Aleksei Sviridkin 88a7ea0e3c fix(kubeovn): retry VM migration setup after scheduling (#4253)
## What this PR does

Kube-OVN can drop VM migration setup when a migration enters
`Scheduling` before the target Pod is visible or the source or target
node is known. The phase may remain unchanged afterward, leaving the
target Pod waiting for network setup.

Backport the final fix from kubeovn/kube-ovn#6834 to the pinned v1.15.10
image: return an error for the transient missing-node case so the
existing rate-limited queue retries it. Keep the same-node behavior
unchanged. That backport can be removed when updating to v1.15.14 or
later.

Add a separate retry guard for the target-Pod creation race. It returns
an error when the informer cache has no target Pod yet, instead of
forgetting the migration event. This guard is not part of #6834 and must
remain until an equivalent fix is verified in the selected upstream
version.

Also include the existing kubeovn image target in the root build list.
Without it, a kubeovn patch produces an empty PR build matrix and the
image is omitted from the regular build and release paths.

Validation:
- All six regression cases pass on Linux/amd64 using the real controller
workqueue. The new missing-target-Pod case fails without its guard and
passes after the Pod appears in the informer cache, without changing the
VMIM phase. The existing deferred-node, already-scheduled, and same-node
cases continue to pass.
- All 19 build-matrix tests pass; the full matrix includes kubeovn
exactly once.
- Both lint steps, pinned golangci-lint v2.10.1 and upstream `modernize
-test -skipgenerated ./...`, pass for the Linux/amd64 target using Go
1.26.4. On macOS, modernize is built for the host and run with the Linux
target environment, since `go tool` otherwise tries to execute a
cross-compiled Linux binary.
- All three packaged patches apply cleanly to pinned v1.15.10 with `git
apply --check --whitespace=error`; the resulting source matches the
tested tree. Formatting and source/build whitespace checks pass.

The regression test covers controller queue behavior; the standard
container E2E environment does not cover DRBD-backed live migration. The
regular image build applies the backport and stamps the resulting digest
before packaging.

### Screenshots

Not applicable; no UI change.

### Downstream repositories

- [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:
- [ ] [cozystack/community](https://github.com/cozystack/community) -
follow-up:

The change adds an existing image target to the build list; package
layout, make target interfaces, chart values, APIs, and published
image-reference formats stay the same. CCP discovers package image
targets dynamically and does not carry the root build list. The website
has no documented workaround for kubeovn/kube-ovn#6823 or #6834 to
remove.

### Release note

```release-note
fix(kubeovn): retry VM migration network setup when the target Pod or source/target scheduling information is not yet available, and include the Kube-OVN image in the regular build matrix.
```


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

- **Bug Fixes**
- Improved VM migration handling when source or destination node
scheduling information is temporarily unavailable.
- Migration events are now retried after scheduling completes instead of
being dropped.
- Preserved existing behavior when migration source and destination
nodes are identical.

- **Tests**
- Added coverage for migration scheduling and retry scenarios, including
partially assigned and same-node cases.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->
2026-09-18 17:29:45 +04:00
2025-10-08 09:43:34 +05:00
2024-02-08 12:04:32 +01:00

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