2022-03-03 11:44:45 +00:00
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= Graceful Startup of an Openshift 4 Cluster
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2021-09-24 15:07:45 +09:00
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This SOP should be followed in the following scenarios:
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- Graceful start up of an Openshift 4 cluster.
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2022-03-03 11:44:45 +00:00
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== Steps
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2021-09-24 15:07:45 +09:00
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Prequisite steps:
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2022-03-03 11:44:45 +00:00
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=== Start the VM Control Plane instances
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2021-09-24 15:07:45 +09:00
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Ensure that the control plane instances start first.
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----
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# Virsh command to start the VMs
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----
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2022-03-03 11:44:45 +00:00
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=== Start the physical nodes
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2021-09-24 15:07:45 +09:00
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To connect to `idrac`, you must be connected to the Red Hat VPN. Next find the management IP associated with each node.
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On the `batcave01` instance, in the dns configuration, the following bare metal machines make up the production/staging OCP4 worker nodes.
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----
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2025-07-04 11:55:02 +02:00
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oshift-dell01 IN A 10.16.160.180 # worker01 prod
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oshift-dell02 IN A 10.16.160.181 # worker02 prod
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oshift-dell03 IN A 10.16.160.182 # worker03 prod
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oshift-dell04 IN A 10.16.160.183 # worker01 staging
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oshift-dell05 IN A 10.16.160.184 # worker02 staging
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oshift-dell06 IN A 10.16.160.185 # worker03 staging
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2021-09-24 15:07:45 +09:00
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----
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Login to the `idrac` interface that corresponds with each worker, one at a time. Ensure the node is booting via harddrive, then power it on.
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2022-03-03 11:44:45 +00:00
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=== Once the nodes have been started they must be uncordoned if appropriate
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2021-09-24 15:07:45 +09:00
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----
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oc get nodes
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NAME STATUS ROLES AGE VERSION
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dumpty-n1.ci.centos.org Ready,SchedulingDisabled worker 77d v1.18.3+6c42de8
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dumpty-n2.ci.centos.org Ready,SchedulingDisabled worker 77d v1.18.3+6c42de8
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dumpty-n3.ci.centos.org Ready,SchedulingDisabled worker 77d v1.18.3+6c42de8
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dumpty-n4.ci.centos.org Ready,SchedulingDisabled worker 77d v1.18.3+6c42de8
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dumpty-n5.ci.centos.org Ready,SchedulingDisabled worker 77d v1.18.3+6c42de8
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kempty-n10.ci.centos.org Ready,SchedulingDisabled worker 106d v1.18.3+6c42de8
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kempty-n11.ci.centos.org Ready,SchedulingDisabled worker 106d v1.18.3+6c42de8
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kempty-n12.ci.centos.org Ready,SchedulingDisabled worker 106d v1.18.3+6c42de8
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kempty-n6.ci.centos.org Ready,SchedulingDisabled master 106d v1.18.3+6c42de8
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kempty-n7.ci.centos.org Ready,SchedulingDisabled master 106d v1.18.3+6c42de8
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kempty-n8.ci.centos.org Ready,SchedulingDisabled master 106d v1.18.3+6c42de8
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kempty-n9.ci.centos.org Ready,SchedulingDisabled worker 106d v1.18.3+6c42de8
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nodes=$(oc get nodes -o name | sed -E "s/node\///")
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for node in ${nodes[@]}; do oc adm uncordon $node; done
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node/dumpty-n1.ci.centos.org uncordoned
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node/dumpty-n2.ci.centos.org uncordoned
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node/dumpty-n3.ci.centos.org uncordoned
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node/dumpty-n4.ci.centos.org uncordoned
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node/dumpty-n5.ci.centos.org uncordoned
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node/kempty-n10.ci.centos.org uncordoned
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node/kempty-n11.ci.centos.org uncordoned
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node/kempty-n12.ci.centos.org uncordoned
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node/kempty-n6.ci.centos.org uncordoned
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node/kempty-n7.ci.centos.org uncordoned
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node/kempty-n8.ci.centos.org uncordoned
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node/kempty-n9.ci.centos.org uncordoned
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oc get nodes
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NAME STATUS ROLES AGE VERSION
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dumpty-n1.ci.centos.org Ready worker 77d v1.18.3+6c42de8
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dumpty-n2.ci.centos.org Ready worker 77d v1.18.3+6c42de8
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dumpty-n3.ci.centos.org Ready worker 77d v1.18.3+6c42de8
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dumpty-n4.ci.centos.org Ready worker 77d v1.18.3+6c42de8
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dumpty-n5.ci.centos.org Ready worker 77d v1.18.3+6c42de8
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kempty-n10.ci.centos.org Ready worker 106d v1.18.3+6c42de8
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kempty-n11.ci.centos.org Ready worker 106d v1.18.3+6c42de8
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kempty-n12.ci.centos.org Ready worker 106d v1.18.3+6c42de8
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kempty-n6.ci.centos.org Ready master 106d v1.18.3+6c42de8
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kempty-n7.ci.centos.org Ready master 106d v1.18.3+6c42de8
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kempty-n8.ci.centos.org Ready master 106d v1.18.3+6c42de8
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kempty-n9.ci.centos.org Ready worker 106d v1.18.3+6c42de8
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----
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2022-03-03 11:44:45 +00:00
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== Resources
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2021-09-24 15:07:45 +09:00
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- [1] https://docs.openshift.com/container-platform/4.5/backup_and_restore/graceful-cluster-restart.html[Graceful Cluster Startup]
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- [2] https://docs.openshift.com/container-platform/4.5/backup_and_restore/disaster_recovery/scenario-2-restoring-cluster-state.html#dr-restoring-cluster-state[Cluster disaster recovery]
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