Day-to-Day Operations

Accessing the Cluster

Getting Cluster Credentials

1. Obtain the kubeconfig:

   drpcli profiles get demo param openshift/kubeconfig > kubeconfig
   export KUBECONFIG="$PWD/kubeconfig"
   

2. Get the console URL:

   drpcli profiles get demo param openshift/console
   

3. Get the kubeadmin password:

   drpcli profiles get demo param openshift/kubeadmin-password
   

Health Monitoring

Essential monitoring commands:

# Node status and resource usage
oc get nodes
oc adm top nodes

# Workload health
oc get pods --all-namespaces
oc get events --sort-by='.metadata.creationTimestamp'

# Control plane health
oc get clusteroperators

# ACM health (if installed)
oc get pods -n open-cluster-management
oc get multiclusterhub -n open-cluster-management

Common Tasks

Adding Worker Nodes

1. Update worker names in DRP:

   drpcli profiles set demo param openshift/workers/names to - <<EOF
   [
     "worker1.demo.k8s.local",
     "worker2.demo.k8s.local",
     "worker3.demo.k8s.local",
     "worker4.demo.k8s.local"
   ]
   EOF
   

2. Re-run cluster provision to create new nodes:

   drpcli clusters stage demo universal-cluster-provision
   

Removing Nodes

1. Create a work order to remove the node:

   drpcli work_orders create '{"Meta": {"cluster-name": "demo", "node-name": "worker2.demo.k8s.local"}, "Blueprint": "openshift-cluster-remove-node"}'
   

2. Monitor the work order status:

   drpcli work_orders show [work-order-uuid]
   

Upgrading OpenShift

1. Check available updates:

   oc adm upgrade
   

2. Initiate upgrade:

   oc adm upgrade --to=<version>
   

3. Monitor progress:

   oc get clusterversion
   oc get clusteroperators
   

Managing Advanced Cluster Manager

1. Check ACM operator status:

   oc get csv -n open-cluster-management
   oc get pods -n open-cluster-management
   

2. Verify MultiClusterHub status:

   oc get multiclusterhub -n open-cluster-management
   oc get multiclusterhub multiclusterhub -n open-cluster-management -o yaml
   

3. Access ACM features:

   # ACM is integrated into the OpenShift console
   # Access it through the OpenShift web console menu
   
   # Check managed clusters
   oc get managedclusters -A
   

Note: Advanced Cluster Management features are integrated directly into the OpenShift console. Once ACM is installed, you can access its features through the OpenShift web console's menu under "Home" → "Multicluster".