1.18.2. Resolving the problem: Klusterlet application manager on managed cluster

On your hub cluster, annotate the klusterletaddonconfig to pause replication. See the following command:

oc annotate klusterletaddonconfig -n ${CLUSTER_NAME} ${CLUSTER_NAME} klusterletaddonconfig-pause=true --  overwrite=true

On your hub cluster, scale down the klusterlet-addon-operator. See the following command:

oc edit manifestwork ${CLUSTER_NAME}-klusterlet-addon-operator -n ${CLUSTER_NAME}

Find the klusterlet-addon-operator Deployment and add replicas: 0 to the spec to scale down.

- apiVersion: apps/v1
  kind: Deployment
  metadata:
    labels:
      app: cluster1
    name: klusterlet-addon-operator
    namespace: open-cluster-management-agent-addon
    spec:
      replicas: 0

On the managed cluster, the open-cluster-management-agent-addon/klusterlet-addon-operator pod will be terminated.

Log in to the managed cluster to manually increase the memory limit in the appmgr pod.

Run the following command:

% oc edit deployments -n open-cluster-management-agent-addon klusterlet-addon-appmgr

For example, if the limit is 5G, increase the limit to 8G.

resources:
  limits:
    memory: 2Gi  -> 8Gi
  requests:
    memory: 128Mi -> 256Mi