3.4. Preparing for Installation on *nix Systems
3.4.1. Setting up the JDK for the JBoss ON Server
The JBoss ON server requires Java 6 or later JDK.
- Download and install the appropriate version of Java, if necessary.
- Set the
JAVA_HOMEenvironment variable to the installation directory.- Open the
.bashrcfor the system user that will run JBoss ON. For example:vim /home/jon/.bashrc
- Add a line to set the
JAVA_HOMEenvironment variable to the specific JDK directory. For example:export JAVA_HOME=/usr/lib/jvm/java-1.6.0-openjdk-1.6.0.0/
- Set the system to use the correct version of the JDK using the system alternatives command. The selected version has the *+ symbols by it.
/usr/sbin/alternatives --config javac There are 2 programs which provide 'javac'. Selection Command ----------------------------------------------- 1 /usr/lib/jvm/java-1.6.0-bea/bin/javac *+ 2 /usr/lib/jvm/java-1.6.0-openjdk/bin/javac Enter to keep the current selection[+], or type selection number:
3.4.2. Configuring NTP
Synchronize machine clocks. All JBoss ON servers and agents must have synchronized clocks. Clock variations cause issues in availability reporting, metric measurements, graphing, and even identifying and importing resources into inventory. The Network Time Protocol project, http://www.ntp.org/, has information on installing and configuring NTP to ensure your clocks are synchronized.
3.4.3. Configuring DNS
Both forward and reverse DNS mapping entries must be present for all systems for which host servers, storage nodes, and agents.
Every IP address must have a corresponding entry in the DNS server or must be explicitly defined in every
/etc/hosts file for each system which is managed by JBoss ON or hosts a server or storage node.
3.4.4. Configuring Ports
Configure the firewall to allow communication over the server, agent, and storage node ports. If the required ports are blocked, then individual components will be unable to communicate with each other.
Using the default configuration, JBoss ON uses the ports listed in Table 3.2, “Default JBoss ON Ports”.
| Port | Purpose |
|---|---|
| 7080 | Standard HTTP port for server-client communication |
| 7443 | HTTPS port for secure server-client communication |
| 16163 | For agent communication from the server |
| 9142 | For storage cluster communication |
| 7299 | For storage node JMX communication |
| 7100 | For the storage node gossip (node-to-node) communication |
