Cloudera Manager's Host Monitoring features let you manage and monitor the status of the hosts in your clusters.
- Click Hosts. The All Hosts page displays with a list of all the hosts managed by Cloudera Manager.
- In the Home screen, click in a cluster table. The All Hosts page displays with a list of the hosts filtered by the cluster name.
The list of hosts shows the overall status of the Cloudera Manager-managed hosts in your cluster. The information provided includes the version of CDH running on the host, the cluster to which the host belongs, and the number of roles running on the host.
- Clicking the to the left of the number of roles lists all the role instances running on that host. The balloon annotation that appears when you move the cursor over a link indicates the service instance to which the role belongs.
- All columns in the table can be filtered either by typing text and clicking Enter or by selecting a filter specification from the drop-down list in the filter field.
- You can change the data you see for the hosts in the host list using
the View Columns menu:
- Current States shows you basic information (Host name, IP, rack assignment, CDH version, health status, when the Last Heartbeat occurred, and the Decommission status.)
- Physical Attributes shows you physical information about the host such as the number of cores, system load averages for the past 1, 5, and 15 minutes, disk usage, physical memory and swap space usage.
Under the Actions for Selected menu you can manage rack locality by assigning hosts to racks, delete hosts, decommission and recommission hosts, start all roles on the host, and enter or exit maintenance mode. You can also apply a Host Template to a host, if that host does not have any roles currently running on it.
You can also Add New Hosts to Cluster, run the Host Inspector, and Re-run Host Upgrade Wizard from this page.
Viewing Individual Hosts
You can view detailed information about an individual host — resources (CPU/memory/storage) used and available, which processes they are running, details about the host agent, and much more — by clicking on the individual host. See Host Details.