myasnikovdaniil 63dc235b1a [Backport release-1.6] fix(api): preserve foreign HelmRelease metadata and repair empty required fields (#4919)
## What this PR does

Backport of #2914 and #3956 to `release-1.6`. It sits on top of #4683,
which is merged here now.

#2914: `Update` on an Application rebuilds the HelmRelease and sends a
full-replace PUT, so metadata owned by other controllers was dropped,
helm-controller's `finalizers.fluxcd.io` among it. A delete landing
before helm-controller added the finalizer back removed the HelmRelease
without `helm uninstall` and orphaned every resource of the release. Now
`Update` carries over finalizers, ownerReferences and labels/annotations
outside the `apps.cozystack.io-` prefix from the live object,
`mergeMaps` no longer returns the shared config map that requests wrote
into, and a conflict retry rebuilds the carried metadata from the object
it just read instead of writing the stale copy back.

#3956: a required spec field written with nothing under it (`replicas:`)
reached Helm as null, Helm coalescing deletes it together with the chart
default before schema validation, and the whole release failed with
"missing property" for a property the spec does contain. Such a null is
removed on Create and Update now so the chart default applies, and the
client gets a warning with the field name. Optional fields, free-form
subtrees, user-keyed map entries and array elements keep their nulls.
Admission validates the normalized copy, the caller's object is not
mutated anymore.

On this branch #4683 inlined the garbage collection finalizer merge and
the deletion metadata copy, because `applyLiveMetadata` didn't exist
yet. They move into `applyLiveMetadata` here, so `Update` and its
helpers match main. Suspend preservation (#4411) is not on this branch
and not part of this backport.

The example field in #3956, `talos.registryMirrors`, doesn't exist in
the kubernetes chart on this branch, so the tests use required fields
that do (`talos.installerRepository`, `talos.version`,
`controlPlane.replicas`). The node group null is its own case, because
`nodeGroups` is still a typed map here and its entries require
`instanceType`. Three test helpers main has from #3315 are copied into a
test-only file. Production code needed one import beyond the
cherry-picks.

### Validation

- `go build ./...` and `go vet ./pkg/registry/...` are clean and `go
test ./pkg/registry/...` passes on the head, rebased onto release-1.6
after #4683 merged.
- The Helm coalescing test renders this branch's own chart values and
schemas, Helm rejects the empty required fields before the repair and
accepts them after it.
- Reverting `applyLiveMetadata` to the plain live finalizer list,
skipping the retry rebuild, or validating the un-normalized object each
turns the related tests red.

### Downstream repositories

The change touches the Application REST handler and its tests only: no
chart, values, schema, CRD, version enum or `hack/` file, so none of the
trigger map entries match.

- [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(api): updating an Application no longer strips finalizers, ownerReferences and foreign labels/annotations from its HelmRelease, which could make a following delete skip helm uninstall and orphan the release's resources. A required field written with no value in an application spec is treated as unset so the chart default applies, instead of failing the whole release.
```
2026-10-14 15:10:59 +05:00
2025-10-08 09:43:34 +05:00
2025-04-01 18:48:14 +02:00
2024-02-08 12:04:32 +01:00

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Cozystack

Cozystack is a free platform and framework for building clouds.

Cozystack is a CNCF Sandbox Level Project that was originally built and sponsored by Ænix.

With Cozystack, you can transform a bunch of servers into an intelligent system with a simple REST API for spawning Kubernetes clusters, Database-as-a-Service, virtual machines, load balancers, HTTP caching services, and other services with ease.

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