July 2018
Intermediate to advanced
504 pages
11h 34m
English
Content preview from Learn OpenShift
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OpenShift masters
OpenShift masters are control plane nodes and the central control points for OpenShift solutions. In earlier releases, you had to install an OpenShift master using Pacemaker (to provide failover), but in recent releases, this is taken care of by keepalived and external storage. If you ever have an OpenShift master fail completely, you can just delete the node and reinstall it.
In order to remove a node from your OpenShift cluster, you can use the oc delete node command, and then run scaleup.yml from the openshift-ansible Git project.
The openshift-ansible project is available at https://github.com/openshift/openshift-ansible.
The scaleup.yml file is located in openshift-ansible/playbooks/byo/openshift-node/scaleup.yml ...