XenCenter

Corosync Upgrade Wizard

Overview

The upgrade wizard can be accessed from either the Clustering tab or the Settings page.

Before you Start

The wizard first displays a summary of automated steps required to upgrade from Corosync 2 to Corosync 3.

  1. Click Show affected VMs to view all impacted virtual machines.
  2. Click Show affected SRs to view all impacted storage repositories.

Pre-Checks

The wizard automatically disables High Availability (HA) if it is currently enabled.

XenCenter performs each step automatically and displays progress in real time.

Before you continue, verify that the pre-checks have passed and that all affected virtual machines remain shut down.

When ready, click Next to start the upgrade process.

Upgrade process

During the upgrade, do not close XenCenter or restart any host. The Progress bar shows the status of each automated action.

After the upgrade completes, XenCenter displays a summary of the results and any actions performed during the process.

If the wizard disabled High Availability (HA) earlier, XenCenter re-enables it automatically once the upgrade finishes successfully.

Virtual machines then restart on the same hosts where they were running before shutdown. When you review the summary and confirm completion, click Finish to close the wizard.

If there are errors hit the retry button or Click Finish once the GFS2 storage is successfully upgraded to Corosync 3.

Note:

If HA was disabled by the wizard, it will only be re-enabled upon successful completion of the upgrade.

After the upgrade, VMs will restart on the same host they were running on prior to shutdown.

XenCenter RPU behaviour during upgrade

When upgrading from XenServer 8.4 to a greater version, the Rolling Pool Upgrade (RPU) wizard performs additional checks based on Corosync status.

Case Condition Action
1 Corosync 3 is active Proceed with upgrade.
2 Corosync 2 is active, clustering enabled but no SRs attached Wizard allows disabling clustering via Disable Clustering
3 Corosync 2 is active, clustering enabled with SRs attached Upgrade is blocked until Corosync 3 is installed
Corosync Upgrade Wizard