Monitoring Hosts

Cloudera Manager's Host Monitoring features let you manage and monitor the status of the hosts in your clusters.

Viewing All Hosts

To display summary information about all the hosts managed by Cloudera Manager, click Hosts in the main navigation bar. The All Hosts page displays with a list of all the hosts managed by Cloudera Manager.

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.
  • Filter the hosts by typing a property value in the Search box or selecting a value from the facets at the left of the page.

Disks Overview

Click the Disks Overview button to display an overview of the status of all disks in the deployment. The statistics exposed match or build on those in iostat, and are shown in a series of histograms that by default cover every physical disk in the system.

Adjust the endpoints of the time line to see the statistics for different time periods. Specify a filter in the box to limit the displayed data. For example, to see the disks for a single rack rack1, set the filter to: logicalPartition = false and rackId = "rack1". Click a histogram to drill down and identify outliers.

Viewing the Hosts in a Cluster

Do one of the following:
  • Select Clusters > Cluster name > General > Hosts.
  • In the Home screen, click in a full form cluster table.
The All Hosts page displays with a list of the hosts filtered by the cluster name.

Viewing Individual Hosts

You can view detailed information about an individual host—resources (CPU/memory/storage) used and available, which processes it is running, details about the host agent, and much more—by clicking a host link on the All Hosts page.See Host Details.