How your system is affected during the upgrade

You must understand how your StorageGRID system will be affected during the upgrade.

StorageGRID upgrades are non-disruptive

The StorageGRID system can ingest and retrieve data from client applications throughout the upgrade process. Grid nodes are brought down one at a time during the upgrade, so there is not a time when all grid nodes are unavailable.

To allow for continued availability, you must ensure that objects are stored redundantly using the appropriate ILM policies. You must also ensure that all external S3 or Swift clients are configured to send requests to one of the following:
  • A StorageGRID endpoint configured as a high availability (HA) group
  • A high availability third-party load balancer
  • Multiple Gateway Nodes for each client
  • Multiple Storage Nodes for each client

Appliance firmware is upgraded

During the StorageGRID 11.5 upgrade:
  • All StorageGRID appliance nodes are automatically upgraded to StorageGRID Appliance Installer firmware version 3.5.
  • SG6060 and SGF6024 appliances are automatically upgraded to BIOS firmware version 3B03.EX and BMC firmware version BMC 3.90.07.
  • SG100 and SG1000 appliances are automatically upgraded to BIOS firmware version 3B08.EC and BMC firmware version 4.64.07.

Alerts might be triggered

Alerts might be triggered when services start and stop and when the StorageGRID system is operating as a mixed-version environment (some grid nodes running an earlier version, while others have been upgraded to a later version). For example, you might see the Unable to communicate with node alert when services are stopped, or you might see the Cassandra communication error alert when some nodes have been upgraded to StorageGRID 11.5 but other nodes are still running StorageGRID 11.4.

In general, these alerts will clear when the upgrade completes.

After the upgrade completes, you can review any upgrade-related alerts by selecting Recently resolved alerts from the Grid Manager Dashboard.
Note: During the upgrade to StorageGRID 11.5, the ILM placement unachievable alert might be triggered when Storage Nodes are stopped. This alert might persist for 1 day after the upgrade is completed successfully.

Many SNMP notifications are generated

Be aware that a large number of SNMP notifications might be generated when grid nodes are stopped and restarted during the upgrade. To avoid excessive notifications, unselect the Enable SNMP Agent Notifications check box (Configuration > Monitoring > SNMP Agent) to disable SNMP notifications before you start the upgrade. Then, re-enable notifications after the upgrade is complete.

Configuration changes are restricted

Until the Enable New Feature task completes:
  • Do not make any grid configuration changes.
  • Do not change the audit level configuration.
  • Do not enable or disable any new features.
  • Do not update the ILM configuration. Otherwise, you might experience inconsistent and unexpected ILM behavior.
  • Do not apply a hotfix or recover a grid node.
Until the Final Upgrade Steps task completes:
  • Do not perform an expansion procedure.
  • Do not perform a decommission procedure.