Entering Maintenance Mode
You can enable maintenance mode for a cluster, service, role, or host.
Minimum Required Role: Configurator (also provided by Cluster Administrator, Limited Cluster Administrator , and Full Administrator)
Putting a Cluster into Maintenance Mode
- In the left menu, click .
- Click the Actions menu (
) to the right of the cluster name and select Enter Maintenance Mode.
- Confirm that you want to do this.
The cluster is put into explicit maintenance mode, as indicated by
the icon. All services and
roles in the cluster are entered into effective maintenance mode, as
indicated by the
icon.
Putting a Service into Maintenance Mode
- In the left menu, click Clusters and select the service.
- Click .
- Confirm that you want to do this.
The service is put into explicit maintenance mode, as indicated by
the icon. All roles for the
service are entered into effective maintenance mode, as indicated by
the
icon.
Putting Roles into Maintenance Mode
- In the left menu, click Clusters and select the service.
- Click the Instances tab.
- Select the role(s) you want to put into maintenance mode.
- From the Actions for Selected menu, select Enter Maintenance Mode.
- Confirm that you want to do this.
The roles will be put in explicit maintenance mode. If the roles were already in effective maintenance mode (because its service or host was put into maintenance mode) the roles will now be in explicit maintenance mode. This means that they will not exit maintenance mode automatically if their host or service exits maintenance mode; they must be explicitly removed from maintenance mode.
Putting Hosts into Maintenance Mode
- In Cloudera Manager, select the cluster where you want to decommission hosts.
- Click .
- Select the hosts that you want to put into Maintenance Mode.
- Select
The Begin Maintenance (Suppress Alerts/Decommission) dialog box opens. The role instances running on the hosts display at the top. You can also use this dialog box to decommission the host.
. - Deselect the Decommission Host(s) option to
put the host into Maintenance Mode. In this
mode, alerts from the hosts are suppressed until the host exits
Maintenance Mode. The events, however, are still logged. Hosts that
are currently in Maintenance Mode display the
icon.
- Click Begin Maintenance.
The Host Decommission Command dialog box opens and displays the progress of the command.