How to separate Hazelcast clusters on the same network?

Summary

In some situations, there is a need for more than one CS server on the same network.
This may lead to an occasional disconnect of FPservers.
To support multiple CS instances on the same network we need to isolate each environment by creating a separate Hazelcast cluster Group.

In the below example we will change Hazelcast Group name to “my-second-cs-installation”.

Step-by-Step

1. Login to each FPserver console and edit /opt/fpExtConfig.conf file.

From:
{
  "groupName": "",
  "ssl": {
    "certFilePath": "",
    "keyFilePath": ""
  },
  "cfgFileVersion": 2,
  "server.launch.seconds": 15

To:
{
  "groupName": "my-second-cs-installation",
  "ssl": {
    "certFilePath": "",
    "keyFilePath": ""
  },
  "cfgFileVersion": 2,
  "server.launch.seconds": 15

2. Go to CS cPanel and from the menu select System-> HZ config which will open the external configuration file (/opt/appExtConfig.conf) for edit. You will see something like

{“groupName”:””}.

Change the value of groupName to the desired group name:

{“groupName”: “my-second-cs-installation”}
 

3. Reboot CS server and each FP server. Once all members of the Hazelcast cluster are running, we should see a new group name in GUI: System->System Status.

Hazelcals Group (under Hazelcast Info section) will appear as “my-second-cs-installation”}