Email notifications and AutoSupport messages

In a multi-site StorageGRID Webscale system, one Admin Node is configured as the preferred sender of notifications and AutoSupport messages. This preferred sender can be any Admin Node. All other Admin Nodes become "standby" senders.

Under normal system operations, only the preferred sender sends notifications and AutoSupport messages. The standby sender monitors the preferred sender and if it detects a problem, the standby sender switches to online status and assumes the task of sending notifications and AutoSupport messages.

Preferred and standby senders

There are two scenarios in which both the preferred sender and the standby sender can send notifications and AutoSupport messages:
  • It is possible that while the StorageGRID Webscale system is running in this "switch-over" scenario, where the standby sender assumes the task of sending notifications and AutoSupport messages, the preferred sender will maintain the ability to send notifications and AutoSupport messages. If this occurs, duplicate notifications and AutoSupport messages are sent: one from the preferred sender and one from the standby sender. When the Admin Node configured as the standby sender no longer detects errors on the preferred sender, it switches to "standby" status and stops sending notifications and AutoSupport messages. Notifications and AutoSupport messages are once again sent only by the preferred sender.
  • If the standby sender cannot detect the preferred sender, the standby sender switches to online and sends notifications and AutoSupport messages. In this scenario, the preferred sender and standby senders are "islanded" from each other. Each sender (Admin Node) can be operating and monitoring the system normally, but because the standby sender cannot detect the other Admin Node of the preferred sender, both the preferred sender and the standby sender send notifications and AutoSupport messages.

When sending a test email, all NMS services send a test email.