github/kubernetes
1
0
Fork 0
mirror of https://github.com/k3s-io/kubernetes.git synced 2026-01-05 23:47:50 +00:00
Code Issues Projects Releases Wiki Activity

Enqueue dependents for deletion when their ownerReference does not match observed parent coordinates

Browse Source 
When adding a dependent to the graph, we ensure there is a node representing each owner reference,
and add the dependent to each parent node.

If the parent node already exists, and the dependent's ownerReference
coordinates disagree with the verified coordinates, add the dependent to the attemptToDelete queue.

This queue will check the dependent's ownerReferences using the coordinates specified by the dependent.
If all of the owners can be verified absent, the dependent will be deleted.
If some are still present, or if there are errors looking them up, the dependent will not be deleted.

If the parent node has been observed via informer event (so we know the coordinates are accurate),
and the verified owner is namespaced, and the dependent is not in the same namespace,
an event will be recorded for user visibility, since cross-namespace ownerReferences are not supported.
This commit is contained in:
Jordan Liggitt
2020-07-02 01:04:13 -04:00
parent 78317edb8b
commit ac8d419b4c
2 changed files with 70 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
pkg/controller/garbagecollector/graph.go
View File

@@ -178,6 +178,12 @@ func ownerReferenceCoordinates(ref metav1.OwnerReference) metav1.OwnerReference
}
}
// ownerReferenceMatchesCoordinates returns true if all of the coordinate fields match
// between the two references (uid, name, kind, apiVersion)
func ownerReferenceMatchesCoordinates(a, b metav1.OwnerReference) bool {
return a.UID == b.UID && a.Name == b.Name && a.Kind == b.Kind && a.APIVersion == b.APIVersion
}
// String renders node as a string using fmt. Acquires a read lock to ensure the
// reflective dump of dependents doesn't race with any concurrent writes.
func (n *node) String() string {