Chapter 15. Administering the Self-Hosted Engine
15.1. Maintaining the Self-Hosted Engine
Self-hosted Engine Maintenance Modes
The maintenance modes enable you to start, stop, and modify the Manager virtual machine without interference from the high-availability agents, and to restart and modify the self-hosted engine nodes in the environment without interfering with the Manager.
There are three maintenance modes that can be enforced:
-
global- All high-availability agents in the cluster are disabled from monitoring the state of the Manager virtual machine. The global maintenance mode must be applied for any setup or upgrade operations that require theovirt-engineservice to be stopped, such as upgrading to a later version of Red Hat Virtualization. -
local- The high-availability agent on the node issuing the command is disabled from monitoring the state of the Manager virtual machine. The node is exempt from hosting the Manager virtual machine while in local maintenance mode; if hosting the Manager virtual machine when placed into this mode, the Manager will migrate to another node, provided there is one available. The local maintenance mode is recommended when applying system changes or updates to a self-hosted engine node. -
none- Disables maintenance mode, ensuring that the high-availability agents are operating.
Setting Local Maintenance
Stop the high-availability agent on a single self-hosted engine node.
Setting the local maintenance mode from the Administration Portal
Put a self-hosted engine node into local maintenance mode:
-
In the Administration Portal, click
and select a self-hosted engine node. -
Click
. Local maintenance mode is automatically triggered for that node.
-
In the Administration Portal, click
After you have completed any maintenance tasks, disable the maintenance mode:
-
In the Administration Portal, click
and select the self-hosted engine node. -
Click
.
-
In the Administration Portal, click
Setting the local maintenance mode from the command line
Log in to a self-hosted engine node and put it into local maintenance mode:
# hosted-engine --set-maintenance --mode=local
After you have completed any maintenance tasks, disable the maintenance mode:
# hosted-engine --set-maintenance --mode=none
Setting Global Maintenance
Stop the high-availability agents on all self-hosted engine nodes in the cluster.
Setting the global maintenance mode from the Administration Portal
Put all of the self-hosted engine nodes into global maintenance mode:
-
In the Administration Portal, click
and select any self-hosted engine node. -
Click More Actions (
), then click Enable Global HA Maintenance.
-
In the Administration Portal, click
After you have completed any maintenance tasks, disable the maintenance mode:
-
In the Administration Portal, click
and select any self-hosted engine node. -
Click More Actions (
), then click Disable Global HA Maintenance.
-
In the Administration Portal, click
Setting the global maintenance mode from the command line
Log in to any self-hosted engine node and put it into global maintenance mode:
# hosted-engine --set-maintenance --mode=global
After you have completed any maintenance tasks, disable the maintenance mode:
# hosted-engine --set-maintenance --mode=none
