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# Graceful Startup of an Openshift 4 Cluster
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This SOP should be followed in the following scenarios:
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- Starting up an Openshift 4 cluster.
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## Steps
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Prequisite steps:
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### Start the physical nodes :
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- Production uses `adhoc-ipmi-poweron.yml` playbook to stop/start/restart nodes :
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```
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ansible-playbook playbooks/adhoc-ipmi-poweron.yml -l ocp-ci
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```
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- Staging uses `adhoc-seamicro-poweron.yml` playbook to start the powered off seamicro compute nodes
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```
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ansible-playbook playbooks/adhoc-seamicro-poweron.yml # This will prompt for nodes, just use `ocp-ci` as group
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```
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### Once the nodes have been started they must be uncordoned if appropriate
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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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## Resources
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- [1] [Graceful Cluster Startup](https://docs.openshift.com/container-platform/4.5/backup_and_restore/graceful-cluster-restart.html)
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- [2] [Cluster disaster recovery](https://docs.openshift.com/container-platform/4.5/backup_and_restore/disaster_recovery/scenario-2-restoring-cluster-state.html#dr-restoring-cluster-state)
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