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Upgrading HA nodes

The HA upgrade process is to update each node in the cluster individually by running the installation program and allowing it to perform an update of the installed software. This process of installing HA clusters is documented in Installing BMC Atrium Single Sign-On as a High Availability cluster. The overall process is similar to a new cluster installation in that a cluster configuration file is created when you upgrade the first node. This cluster configuration file is used when you upgrade the subsequent nodes. Essentially, the first upgraded node creates a new cluster and then each subsequent node that is upgraded is added to the new cluster.

Note

BMC recommends that you configure the load balancer for the cluster to block access to the cluster before upgrading nodes. The cluster cannot be in use during the upgrade.

BMC recommends that you backup the first node in the cluster prior to upgrading.

To upgrade HA nodes

  1. Ensure that the cluster is not being used.
  2. Run the installation program, autorun on the first node.
    1. Provide the administrator password.
    2. Select First node of cluster upgrade and click Next

    3. Provide the location and file name for where you want the cluster configuration information saved and click Next.
       This cluster configuration file is needed when subsequent nodes are added to the cluster. 

      Important

      This file contains sensitive information.

  3. Copy the cluster configuration file to the computer that hosts the subsequent node.
  4. Run the installation program, autorun on the subsequent node.
    1. Provide the administrator password.
    2. Select the Additional node of cluster upgrade option and click Next.
    3. Provide the location of the cluster configuration file (created during the first node upgrade).
  5. For additional nodes, repeat steps 3 and 4.
  6. (Optional) Add new nodes to the cluster by running the installation program on a computer which does not already contain a node. For more information about adding new nodes to the cluster, see Installing-additional-nodes-for-an-HA-cluster-on-a-new-Tomcat-server or Installing-additional-nodes-for-an-HA-cluster-on-an-external-Tomcat-server.

Note

The order of in which nodes are upgraded does not matter since any node can be the first node. The state of the nodes (running or not) does not impact the upgrade.

 

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