Viewing Host Status

You can view summary information about the hosts managed by Cloudera Manager. You can view information for all hosts, the hosts in a cluster, or individual hosts.

Viewing All Hosts

To display summary information about all the hosts managed by Cloudera Manager, click Hosts > All Hosts in the left menu. 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 varies depending on which columns are selected. To change the columns, click the Columns: n Selected drop-down and select the checkboxes next to the columns to display.
Click to the left of the number of roles to list all the role instances running on that host.
Filter the hosts list by entering search terms (hostname, IP address, or role) in the search box separated by commas or spaces. Use quotes for exact matches (for example, strings that contain spaces, such as a role name) and brackets to search for ranges. Hosts that match any of the search terms are displayed. For example:
```
hostname[1-3], hostname8 hostname9, "hostname.example.com"
hostname.example.com “HDFS DataNode”
```
You can also search for hosts by selecting a value from the facets in the Filters section at the left of the page. Click the Filters toggle to show or hide the Filters section.
If the agent heartbeat and health status properties are configured as follows:
- Send Agent heartbeat every x
- Set health status to Concerning if the Agent heartbeats fail y
- Set health status to Bad if the Agent heartbeats fail z
The value v for a host's Last Heartbeat facet is computed as follows:
- v < x * y = Good
- v >= x * y and <= x * z = Concerning
- v >= x * z = Bad

Viewing the Hosts in a Cluster

Do one of the following:

Select Clusters > Cluster name > 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.