Upgrade Procedure

In this procedure, we will refer to the nodes as A and B, based on their state at the beginning of the process (the active node will be node A, the standby node will be node B).

1. Login to the command line of both nodes
2. [Node A] Pin the management IP to Node A:
   1. set ha node -haprop disabled -hasync disabled -hastatus stayprimary
3. [Node B] Initiate the upgrade on node B
   1. shell
   2. cd /var/nsinstall/build-<version>
   3. installns
   4. When the installation completes, reboot node B
4. Wait for node B to complete its reboot, login the the command line of node B
5. [Node A] Sync configuration and force failover to node B
   1. set ha node -hastatus enabled
   2. force ha failover
   3. sh ha node
6. [Node B] Verify HA state, re-enable HA options
   1. set ha node -haprop enabled -hasync enabled
   2. save ns config
7. [Node A] Initiate the upgrade on node A
   1. shell
   2. cd /var/nsinstall/build-<version>
   3. installns
   4. When the installation completes, reboot node A
8. [Node B] Sync configuration and force failover to node A
   1. set ha node -haprop enabled -hasync enabled -hastatus enabled
   2. force ha failover
   3. save ns config

Procedure from: https://www.markbrilman.nl/2012/09/netscaler-in-ha-command-line-upgrade-or-downgrade-procedure