After the bootstrap, master, and worker nodes are installed, as user core, switch to the home directory of core and run the following command:
[core@csah ~]$ cd /home/core
[core@csah ~]$ ./openshift-install --dir=openshift wait-for bootstrap-complete --log-level debug
DEBUG OpenShift Installer v4.3.1
DEBUG Built from commit 2055609f95b19322ee6cfdd0bea73399297c4a3e
INFO Waiting up to 30m0s for the Kubernetes API at https://api.ocp.example.com:6443...
INFO API v1.16.2 up
INFO Waiting up to 30m0s for bootstrapping to complete...
DEBUG Bootstrap status: complete
INFO It is now safe to remove the bootstrap resources
You may now reuse the bootstrap node as a worker node.