How your system is affected during the upgrade

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

Client applications might experience short-term disruptions

The StorageGRID system can ingest and retrieve data from client applications throughout the upgrade process except for a short period of time when services are restarting and the client connections to individual API Gateway Nodes or Storage Nodes are disrupted. Connectivity will be restored after the upgrade finishes and services resume on the individual nodes.

Every node in your StorageGRID system will be brought down one at a time for several minutes each during the upgrade. You might need to schedule downtime for the upgrade if loss of connectivity for a short period is not acceptable.

You must decide when to upgrade API Gateway Nodes based on your grid's configuration. If your StorageGRID system has multiple API Gateway Nodes, you must sequence the upgrade so that client applications are always directed to an available API Gateway Node. If your StorageGRID system has only one API Gateway Node, you must plan a downtime for the upgrade because client applications will not be able to access the system while the API Gateway Node is being upgraded.

Alarms might be triggered

Alarms 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). In general, these alarms will clear when the upgrade completes.

Many emails are generated

When you upgrade grid nodes, email notifications are generated when the node is stopped and restarted. To avoid excessive emails, you can disable email notifications before upgrading the first node and re-enable notifications after the upgrade is completed.

Configuration changes are restricted

While you are upgrading StorageGRID:
  • Do not make any grid configuration changes until the upgrade is complete.
  • Do not change the audit level configuration until the upgrade is complete.
  • Do not enable or disable any new features until the upgrade is complete.
  • Do not update the ILM configuration until the upgrade is complete. Otherwise, you might experience inconsistent and unexpected ILM behavior.

Prometheus will be updated, existing metrics will be deleted

During the upgrade to StorageGRID 11.2, the Prometheus monitoring system will be upgraded to Prometheus 2.x. All of the historic metrics in your Prometheus database will be removed.

SNMP configurations will be deleted

When you upgrade to StorageGRID 11.2, any existing node SNMP configurations will be deleted. If you have an SNMP configuration, copy it before the upgrade, so you can more easily reconfigure SNMP in StorageGRID 11.2.