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When you install Universal Controller, you create a single instance (cluster node) of the Controller. To operate Universal Automation Center in a High Availability (HA) environment, you must add one or more cluster nodes. Each cluster node should be installed on a separate machine.

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This procedure assumes you already have performed any required Pre-Installation Procedure steps for the cluster node being added.

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The Controller installation process writes the values for some command line switches to the Universal Controller Start-up Properties (uc.properties), uc.properties (see the table, below). For any of those command line switches that are not required and, in fact, are not included on the command line, the Controller installation process writes their default value to uc.properties.

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For command line switches that have their value written to the Universal Controller Start-up Properties (uc.properties), uc.properties, the table also identifies the property in that file to which the value is written.

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Step 1

Start Tomcat as follows:
 
Linux
Start the Tomcat daemon using the script placed in the /etc/init.d directory for Tomcat.
 

Panel
service [name of Tomcat service] start

 
Windows
We recommend you use Windows Services to start Tomcat. Or, you can start Tomcat from the command line as follows:
 

Panel
net start [name of Tomcat service]

 
Linux or Windows
You can start the service using the $CATALINA_HOME/bin/startup.bat or $CATALINA_HOME/bin/startup.sh scripts.

Anchor
Opswise log
Opswise log
Step 2

You can view details of the start-up in the Tomcat window or monitor the Controller log, as described below:
 
Linux/Unix
Users can tail the uc.log to monitor the deployment process, as follows:
 

Panel
tail -f $TOMCAT_DIR/uc_logs/uc.log

 
Windows
Users can use a third-party tailing utility or open the log file using Notepad or other editor and scroll to the bottom to view the latest activity.
 

Panel
$TOMCAT_DIR/uc_logs/uc.log


Step 3

When you see the following, the Controller is ready:

  • INFO [Ops.Cluster.Monitor.0] Server is now Running in Passive mode.
  • INFO [Ops.Cluster.Monitor.0] Setting server to PASSIVE.

Step 4

AIX and z/Linux only: Follow this procedure to change two default values in the Universal Controller Start-up Properties (uc.properties), uc.properties, which is read by the Controller.
 
(The uc.properties file resides in <tomcat directory>/webapps/uc/WEB-INF/properties).
 

  1. Change the following two properties from their default value to the AIX - z/Linux value:
     
    • uc.trustmanager.algorithm= (Java trust manager algorithm)
      • Default value = SunX509
      • AIX - z/Linux value = IbmX509
         
    • uc.trustmanager.provider= (Java trust manager provider)
      • Default value = SunJSSE
      • AIX - z/Linux value = IBMJSSE2
         
  2. Restart Tomcat.

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Step 1

Log in to the originally installed Controller.

Step 2

Verify that the Cluster Node Status Widgets illustrates an Active and a Passive cluster node.

Step 3

For detailed information on the new (and original) cluster nodes, select Resources > System > Cluster Nodes.


Note
titleNote

The Apply the License Key for the installed Universal Controller applies to all instances (cluster nodes) of that Controller; no additional licensing is required.

Configure System Notifications configured for the installed Universal Controller apply to all instances (cluster nodes) of that Controller; no additional system notifications have to be configured.

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You must specify all members of an OMS cluster in your HA environment in the same Creating OMS Server Records.

The OMS Servers list screen will contain a single entry for all OMS cluster members defined in the record. (The OMS Servers list screen could have additional entries for an OMS Server or OMS cluster outside of your HA environment. For example, OMS Servers outside a firewall would connect to a different message database and serve different Agents, but would connect to to the same Controller.)

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