Before you perform any other step, ensure the test cluster is in a healthy state. All ClusterOperators must be Available. In addition, verify the NIC name on the node. In this example, the single-node installation has only one NIC, named eno2 (altname enp7s0).
1Verify login: oc whoami
→ should return either system:admin or kubeadmin
2Verify node status: oc get nodes
→ Node status: Ready
3Verify ClusterOperators — all must be Available: oc get co
→ All ClusterOperators: AVAILABLE=True, DEGRADED=False
4Check the cluster version: oc get clusterversion
→ VERSION shows 4.21.x, AVAILABLE=True
5Verify the NIC name on the node:
# Set NODE variable. This applies to a single-node (SNO) cluster only.
NODE=$(oc get node -o name)oc debug $NODE -- chroot /host ip link show6List physical block devices (for LVM Storage in PRE-06):
oc debug $NODE -- chroot /host lsblk -o NAME,SIZE,TYPE,MOUNTPOINT,FSTYPE→ identify free block devices (no
MOUNTPOINT, no FSTYPE)7Check /var storage usage (OCP data, images, and containers live here):
oc debug $NODE -- chroot /host df -h /var