You can use the Explore tool to enable maintenance mode
for a server or host. Enable maintenance mode before you perform diagnostic
tests, maintenance, or tuning on a server joined to a collective or
on a host registered to a collective. Maintenance mode can prevent
the disruption of client requests by routing client traffic targeted
for a server that is in maintenance mode to another server. Enabling
maintenance mode is a persistent change; a server or host remains
in maintenance mode until the mode is disabled.
About this task
The following steps describe how to enable or disable
maintenance mode:
For more information about maintenance mode, see Entering maintenance mode for Liberty collectives.
Procedure
- Enable maintenance mode for a server or
host.
- Open the Explore tool on Servers or Hosts.
- From the Toolbox, select Explore .
- From the Dashboard, select the Servers or Hosts panel.
- When viewing Servers or Hosts, select Actions for a resource and then select Enable Maintenance
Mode from the popup dialog.
Or, select . For example, to enable maintenance
mode on two hosts:
- When viewing Hosts, select Actions .
- Select two registered hosts that are not in maintenance mode.
- Select the More button.
- Select the Enable Maintenance Mode button.
Enabling maintenance mode on a server might require additional selections:
When maintenance mode is enabled on a host, the product attempts to place all servers on the host
into maintenance mode, with the host entering maintenance mode regardless of whether its servers do.
After a host is in maintenance mode, a scaling controller cannot provision new servers on the
host.
- Disable maintenance mode for a server or
host.
When viewing Servers or Hosts in the Explore tool, select Actions for a resource in maintenance mode and then select
Disable Maintenance Mode from the popup dialog.
Or, select .