Technical Tip: Upgrading FortiProxy cluster devices with uninterruptible upgrade and sequential upgrade options

[jintrah_FTNT]

Description	This article describes the process followed while upgrading FortiProxy devices in cluster.
Scope	FortiProxy.
Solution	By default, FortiProxy cluster has uninterruptible upgrade and sequential upgrade settings enabled.  Default Behavior: By default, FortiProxy clusters have the following HA settings enabled: uninterruptible-upgrade: Enabled (minimizes downtime by upgrading subordinates first). sequential-upgrade: Enabled (upgrades secondary nodes one at a time in larger clusters). Upgrade behavior: Both enabled (default): The upgrade is done on secondary devices one at a time. After all the secondary devices are upgraded, a new master is chosen among them, followed by the upgrade of the current master. Sequential-upgrade disabled: The upgrade is done on all secondary devices at once, followed by the upgrade of the current master. Uninterruptible-upgrade disabled: All the cluster members are upgraded simultaneously (faster but causes full service interruption). Note: This also applies to FortiProxy cluster in config-sync only mode.