1.4. Creating an infrastructure node
See Creating infrastructure machine sets for installer-provisioned infrastructure environments or for any cluster where the master nodes are managed by the machine API.
Requirements of the cluster dictate that infrastructure, also called infra nodes, be provisioned. The installer only provides provisions for master and worker nodes. Worker nodes can be designated as infrastructure nodes or application, also called app, nodes through labeling.
Procedure
Add a label to the worker node that you want to act as application node:
$ oc label node <node-name> node-role.kubernetes.io/app=""
Add a label to the worker nodes that you want to act as infrastructure nodes:
$ oc label node <node-name> node-role.kubernetes.io/infra=""
Check to see if applicable nodes now have the
infrarole andapproles:$ oc get nodes
Create a default node selector so that pods without a node selector are assigned a subset of nodes to be deployed on, for example by default deployment in worker nodes. As an example, the
defaultNodeSelectorto deploy pods on worker nodes by default would look like:defaultNodeSelector: node-role.kubernetes.io/app=
-
Move infrastructure resources to the newly labeled
infranodes.
