The software described in this documentation is either no longer supported or is in extended support.
Oracle recommends that you upgrade to a current supported release.
For a multi-master deployment, the following additional ports are required to be open in the firewall on the master node.
On the Kubernetes master nodes run:
$sudo firewall-cmd --add-port=10251/tcp --permanent$sudo firewall-cmd --add-port=10252/tcp --permanent$sudo firewall-cmd --add-port=2379/tcp --permanent$sudo firewall-cmd --add-port=2380/tcp --permanent
Restart the firewall for these rules to take effect:
$ sudo systemctl restart firewalld