Expose the existing linstor-scheduler-extender sidecar as a ClusterIP
Service and configure cozystack-scheduler to call it during the
scheduling cycle. Pods with both a SchedulingClass and LINSTOR PVCs
now get storage-locality-aware placement.
- Add extender Service (port 8099) for linstor-scheduler
- Patch vendored deployment to label pods for Service selector
- Bump cozystack-scheduler to v0.3.0 (configurable extenders)
- Add "linstor" PackageSource variant with extender values
- Default variant ships without extender for non-LINSTOR clusters
- Select linstor variant in system bundle
- Add helm-unittest tests for both packages
Ref: #2328
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Signed-off-by: Timofei Larkin <lllamnyp@gmail.com>
## What this PR does
Update the Cozystack scheduler to its latest version, supporting
automatic placement of label selectors for affinity and topology spread
constraints.
### Release note
```release-note
[cozystack-scheduler] Update Cozystack scheduler to v0.2.0 with support
for reusable affinity terms.
```
Signed-off-by: Timofei Larkin <lllamnyp@gmail.com>
## What this PR does
Adds the cozystack-scheduler as an optional system package, vendored from
https://github.com/cozystack/cozystack-scheduler. The scheduler extends
the default kube-scheduler with SchedulingClass-aware affinity plugins,
allowing platform operators to define cluster-wide scheduling constraints
via a SchedulingClass CRD. Pods opt in via the
`scheduler.cozystack.io/scheduling-class` annotation.
The package includes:
- Helm chart with RBAC, ConfigMap, Deployment, and CRD
- PackageSource definition for the cozystack package system
- Optional inclusion in the platform system bundle
### Release note
```release-note
[cozystack-scheduler] Add cozystack-scheduler as an optional system
package. The custom scheduler supports SchedulingClass CRDs for
cluster-wide node affinity, pod affinity, and topology spread constraints.
```
Signed-off-by: Timofei Larkin <lllamnyp@gmail.com>
