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Maintenance Mode

When a physical machine (PM) enters maintenance mode, it goes offline for service. When you finalize service, the PM exits maintenance mode and goes back online, becoming available for running virtual machines (VMs).

When one PM enters maintenance mode, the PM migrates the VMs running on it to the other PM, which protects the VMs from any potential disruption caused by the service.

When the primary PM (nodex (primary)) enters maintenance mode, the other PM becomes primary.

When both PMs enter maintenance mode, the PMs perform an orderly shutdown of all VMs, which protects their memory state before the PMs shut down or reboot.

Shut down the PMs only from the Physical Machines page with the PM in maintenance mode because the everRun Availability Console protects the system from disruptive action that results from manually powering down a PM.

Cautions:

An everRun system is not fault tolerant when a PM is in maintenance mode. For continuous uptime, finalize service as soon as possible so that the PM can exit maintenance mode and go back online.
Avoid entering both PMs into maintenance mode at the same time. To keep the virtual machines running, at least one PM must be up and running normally. (If you need to shut down the entire everRun system, see Shutting Down a Physical Machine.)

Note: If you want both PMs in maintenance mode, first enter the secondary PM into maintenance mode, and then enter the primary PM into maintenance mode. This sequence avoids the unnecessary migration of VMs.

To enter a PM into maintenance mode

Select a PM from the Physical Machines page.
Click Work On.

When the PM is in maintenance mode, its state displays .

To finalize and exit a PM from maintenance mode

Select a physical machine from the Physical Machines page.
Click Finalize, which exits the PM from maintenance mode.

Related Topics

The everRun Availability Console

Managing Physical Machines

Physical Machines and Virtual Machines

The Physical Machines Page

The Virtual Machines Page

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Product Documentation (PDF Format) everRun User's Guide everRun Quick Start Guide	About Help Help created at 11:06 AM on 1/16/2019.