Changing the process IDs limit

To change the process IDs limit by creating a KubeletConfig:

1. Log in to Red Hat OpenShift Container Platform as a user with sufficient permissions to complete the task.

   ${OC_LOGIN}

   Remember: OC_LOGIN is an alias for the oc login command.
2. Check whether there is an existing kubeletconfig on the cluster:

   oc get kubeletconfig

3. Take the appropriate action based on whether the command returns the name of a kubeletconfig:

   ---

   The command returns the name of a kubeletconfig

   1. Set the KUBELET_CONFIG environment variable to the name of the existing kubeletconfig:

      export KUBELET_CONFIG=<kubeletconfig-name>

   2. Run the following command to patch the kubeletconfig:

      oc patch kubeletconfig ${KUBELET_CONFIG} \
      --type=merge \
      --patch='{"spec":{"kubeletConfig":{"podPidsLimit":16384}}}'

   ---

   The command returns an empty response

   Run the following command to create the kubeletconfig that defines the podPidsLimit:

   oc apply -f - << EOF
   apiVersion: machineconfiguration.openshift.io/v1
   kind: KubeletConfig
   metadata:
     name: cpd-kubeletconfig
   spec:
     kubeletConfig:
       podPidsLimit: 16384
     machineConfigPoolSelector:
       matchExpressions:
       - key: pools.operator.machineconfiguration.openshift.io/worker
         operator: Exists
   EOF

   ---