When using static IP's on the ctlpane network, DNS must be configured on the Overcloud nodes. Previously, DHCP provided the configured DNS servers for the Overcloud nodes.
To configure DNS when using static IPs set the new DnsServers parameter and include it in the Heat environment like so:
- <dns server ip address>
- <dns server ip address 2>
Use IP addresses for the DNS servers to use. You can only specify either one or two DNS servers.