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to change the hostname permanently on that VM.
However, while each machine has to know its own name, it also has to be able to locate the other machine in the "cluster". In production this is accomplished through the DNS server. Fortunately, all systems support a simple static alternative called a "hosts" file. This file is /etc/hosts on Linux or Mac, and C:\windows\system32\drivers\etc\hosts on Windows. It is a simple text file where each line starts with an IP address and then contains one or more host names associated with that address. The VM has a hosts file with two lines:
192.168.137.10 vm-ssoboxapp-01.web.yale.internal casvm1
192.168.137.11 vm-ssoboxapp-02.web.yale.internal casvm2
This maps the full name and a shorter nickname (casvmx) that is easier to type. You should add these lines to the "hosts" file on your host (Windows or Mac) computer so that you can access the VMs by name through the Host-Only adapter.
CAS currently has only two VMs. If you want more than two virtual that changes, or you want to use the Sandbox to work with a different product that has a different cluster configuration with more machines, then you have to add a new can follow the cookie cutter instructions and add additional Network adapter configuration configurations in /etc/sysconfig/network-scripts and add a new an extra line in to all the hosts files.
Centos 7 has a Firewall service (firewalld) that, like Windows has a built in Firewall that might be useful on a desktop machine. In a private virtual network it is useless, and it has been disabled by telling the OS to not start the firewall service ("systemctl disable firewalld"). If you reenable it, then you have to open port 40001 for Ehcache and other ports like 8080 for JBossthe Windows firewall service, provides some protection to a desktop or server machine. It is not used in production machines behind the corporate firewall, and similarly it is not useful on VMs that are hidden on the Host-Only private virtual network, so that service is disabled in the Sandbox. It you want to turn it back on, you have to configure it for JBoss and the clustering.
Clone
The Sandbox VM can be cloned to produce a second CAS VM for testing cluster failover.
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