7.1 Cancel and Restart Automated Server Group Upgrade

When a server group is upgraded using ASG, each server within that server group is automatically prepared for upgrade, upgraded to the target release, and returned to service on the target release. Once an ASG upgrade is initiated, the task responsible for controlling the sequencing of servers entering upgrade can be manually canceled by navigating to Status & Manage and clicking Active Tasks (Figure 7-1) if necessary. Once the task is canceled, it cannot be restarted. However, a new ASG task can be started using the Upgrade Administration screen.

For example, in Figure 7-1, task ID #1 (SO_SG Server Group Upgrade) is an ASG task, while task ID #2 is the corresponding individual server upgrade task. When the ASG task is selected (highlighted in green), the Cancel button is enabled. Canceling the ASG task affects only the ASG task. It has no effect on the individual server upgrade tasks that were started by the ASG task (that is, task ID #2 in Figure 7-1). Because the ASG task is canceled, no new server upgrade is initiated by the task.

Figure 7-1 Server Group Upgrade Active Tasks

If a server fails upgrade, the server automatically rolls back to the previous release in preparation for backout_restore and fault isolation. Any other servers in that server group, which are in the process of upgrading, continue to upgrade to completion; however, the ASG task itself is automatically canceled and no other servers in that server group are upgraded. Canceling the ASG task provides an opportunity for troubleshooting to correct the problem. Once the problem is corrected, the server group upgrade can be restarted by initiating a new server group upgrade on the upgrade screen.