Federated namespace placement doesn't recreate namespace after adding cluster back in

[font]

Going through instructions at https://github.com/font/k8s-example-apps/tree/master/sample-fed-v2-demo, particularly step https://github.com/font/k8s-example-apps/tree/master/sample-fed-v2-demo#update-federatednamespaceplacement, the test-namespace is successfully removed from us-east after updating the namespace placement to remove us-east from the list of clusters.

But when the cluster us-east is added back in, the test-namespace does not get recreated in the us-east cluster causing all the other resources to no get added back due to for example:

E0426 19:44:46.756125       1 controller.go:617] Failed to execute updates for FederatedReplicaSet "test-namespace/test-replicaset": [Failed to create FederatedReplicaSet "test-namespace/test-replicaset" in cluster us-east: namespaces "test-namespace" not found]

Waiting long enough will eventually see the test-namespace created, possibly because the watch operation expires and the controller retries a list operation.

If you restart the federation pod, the test-namespace will quickly reappear in the us-east cluster after the controller receives the list of namespaces and namespace placements. The rest of the resources (configmap, secret, replicaset) then reappear as well once the test-namespace exists.

[marun]

Fixed by #65.