4.3 Docker Fails with IP Firewall

There is a known issue that causes Docker to timeout and fail if the IP firewall is running.

Workaround: On all nodes that run Docker (target nodes, and master nodes), turn off the firewall, if it is running. On Oracle Linux nodes, enter:

# systemctl stop firewalld 
# systemctl disable firewalld

Bug: 21889953, and 21795342