Pools allow administrators to load balance traffic between multiple hosts as well as weight distribute that traffic between systems with different performance capabilities. CNAME Record pools are used to load balance traffic between different host names. To learn more about load balancing check out the Round Robin and Weighted Round Robin tutorials.
Please note, the following example uses a hypothetical infrastructure scenario and should only be used as a guide.
1. Select Managed DNS in the sidebar menu, and then choose CNAME Record Pools from the drop down.
2. Click the Add New Pool button.
3. In this screen, you will add the information for your pool. Follow the steps below:
A) Name: Give your pool configuration an identifiable name.
B) Num Return: enter the number of hostnames you want to have returned in the pool.
C) Min Available: enter the minimum number of hostnames that must be available in the pool.
D) Host: Enter the hostname you want to add to your configuration.
E) Weight: You can give each of the hosts in a pool a different weight, depending on if you want to send more or less traffic to each one. A higher weight will send more traffic to that host. See the Weighted Round Robin tutorial to learn more.
F) Sonar Check: If you have a check in Constellix Sonar already created, you can select it here. If you select a check, then the pool will only serve traffic to that host if it is up, according to Sonar.
G) Enabled: You can move the slider to On or Off to control whether traffic will flow to that host or not.
I) Add Another Host: Additional hostnames can also be added to load balance traffic, just click the Add Another Host button.
J) Save:When you are done, click Save.
NOTE: Hostnames can be enabled or disabled within the pool. Disabled hostnames remain present in the configuration, but will not be active on the name servers.