Chapter 1. Recommended practices for installing large clusters
Apply the following practices when installing large clusters or scaling clusters to larger node counts.
1.1. Recommended practices for installing large scale clusters
When installing large clusters or scaling the cluster to larger node counts, set the cluster network
cidr accordingly in your
install-config.yaml file before you install the cluster:
networking: clusterNetwork: - cidr: 10.128.0.0/14 hostPrefix: 23 machineCIDR: 10.0.0.0/16 networkType: OpenShiftSDN serviceNetwork: - 172.30.0.0/16
The default clusterNetwork cidr 10.128.0.0/14 cannot be used if the cluster size is more than 500 nodes. It must be set to 10.128.0.0/12 or 10.128.0.0/10 to get to larger node counts beyond 500 nodes.