Upgrade nodes in a cluster setup

If you have a multi-node cluster setup and you are updating to Automation 360 v.28, the Automation 360 installation might fail.

Prerequisites

Ensure that the Automation Anywhere Elastic Search Service is up and running before you run the installer on the node.

To successfully update to Automation 360 v.28, you must perform the following steps:

This example describes how to upgrade a three-node cluster:

Procedure

Identify the Elasticsearch master node by entering the https://<CR node# IP>:47599/_cat/nodes URL (in this example, node1 is master node when Elasticsearch is running all three nodes).
Start with the current master node (node1) and complete the installation on the current master node.
Stop the Elasticsearch service on node1. At this stage, node1 will be on Automation 360 v.28.
Open the browser window on node2 or node3 machine, enter the https://<CR node# IP>:47599/_cat/nodes URL for either node2 or node3 to identify the master node.

The <CR node# IP> represents the IP addresses of node2 or node3. The URL will help to identify the current master node after stopping Elasticsearch service on node1. In this example, node2 is master node after stopping service on node1.
Start the installation of Automation 360 v.28 with current master node (in this example, node2 is master node) and complete the installation.
Start the Elasticsearch service on node1.
At this stage, node1 and node2 will be running Automation 360 v.28 that is operating system v2.x libraries.
Stop the Elasticsearch service on node3.

If the Elasticsearch service is not stopped, then the node3 might be treated as master node.
In a browser window (either from node1 or node2 VM) , enter the https://<CR node# IP>:47599/_cat/nodes URL.

The <CR node# IP> represents the IP addresses of node1 or node2. The URL will help to identify the current master node after stopping Elasticsearch service on node3.
Note: The master node should be either node1 or node2.
Start the Elasticsearch service on node3, run Automation 360 v.28 on node3, and complete the installation.
In a browser window (either from node1 or node2 or node3 VM), enter https://<CR node# IP>:47599/_cat/nodes.

The <CR node# IP> represents the IP addresses of node1 or node2. The URL will help to identify the current master node after stopping Elasticsearch service on node3.

The <CR node# IP> represents the IP addresses of node1 or node2 or node3. The URL will help to identify the current master node after you complete the installation on all three nodes.