Cloudera Docs

Recommissioning Hosts

Only hosts that are decommissioned using Cloudera Manager can be recommissioned.

Minimum Required Role: Operator (also provided by Configurator, Cluster Administrator, Limited Cluster Administrator , and Full Administrator)

  1. In Cloudera Manager, select the cluster where you want to recommission hosts.
  2. In the left menu, click Hosts > All Hosts.
  3. Select the hosts that you want to recommission.
  4. Select Actions for Selected > End Maintenance (Suppress Alerts/Decommission.
    The End Maintenance (Suppress Alerts/Decommission dialog box opens. The role instances running on the hosts display at the top.
  5. To recommission the hosts, select Recommission Host(s).
  6. Choose one of the following:
    • Bring hosts online and start all roles

      All decommissioned roles will be recommissioned and started. HDFS DataNodes will be started first and brought online before decommissioning to avoid excess replication.

    • Bring hosts online

      All decommissioned roles will be recommissioned but remain stopped. You can restart the roles later.

  7. Click End Maintenance.
The Recommission Hosts and Start Roles Command dialog box opens and displays the progress of recommissioning the hosts and restarting the roles