feat: validate serviceMonitor selector labels to prevent reconciliation failures #7916
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…on failures When Prometheus resources contain serviceMonitorSelector/serviceMonitorNamespaceSelector with invalid label keys/values (>63 chars or invalid characters), reconciliation would fail This change adds validation before selector processing to gracefully handle invalid selectors and provide clear error messages. Related-to: prometheus-operator#7915 Assisted-by: Cursor Signed-off-by: Jayapriya Pai <slashpai9@gmail.com>
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Description
Describe the big picture of your changes here to communicate to the maintainers why we should accept this pull request.
If it fixes an existing issue (bug or feature), use the following keyword:
When Prometheus resources contain serviceMonitorSelector/serviceMonitorNamespaceSelector
with invalid label keys/values (>63 chars or invalid characters),
reconciliation would fail
This change adds validation before selector processing to gracefully handle
invalid selectors and provide clear error messages.
Related-to: #7915
Type of change
What type of changes does your code introduce to the Prometheus operator? Put an
xin the box that apply.CHANGE(fix or feature that would cause existing functionality to not work as expected)FEATURE(non-breaking change which adds functionality)BUGFIX(non-breaking change which fixes an issue)ENHANCEMENT(non-breaking change which improves existing functionality)NONE(if none of the other choices apply. Example, tooling, build system, CI, docs, etc.)Verification
Please check the Prometheus-Operator testing guidelines for recommendations about automated tests.
Changelog entry
Please put a one-line changelog entry below. This will be copied to the changelog file during the release process.