Manually Install Cloudera Manager Agent Packages

The Cloudera Manager Agent is responsible for starting and stopping processes, unpacking configurations, triggering installations, and monitoring all hosts in a cluster. You can install the Cloudera Manager agent manually on all hosts, or Cloudera Manager can install the Agents in a later step. To use Cloudera Manager to install the agents, skip this section.

To install the Cloudera Manager Agent packages manually, do the following on every cluster host (including those that will run one or more of the Cloudera Management Service roles: Service Monitor, Activity Monitor, Event Server, Alert Publisher, or Reports Manager):

Use one of the following commands to install the Cloudera Manager Agent packages:


OS	Command
RHEL, if you have a yum repo configured:	$ sudo yum install cloudera-manager-agent cloudera-manager-daemons
RHEL, if you're manually transferring RPMs:	$ sudo yum --nogpgcheck localinstall cloudera-manager-agent-package..x86_64.rpm cloudera-manager-daemons..x86_64.rpm

On every cluster host, configure the Cloudera Manager Agent to point to the Cloudera Manager Server by setting the following properties in the /etc/cloudera-scm-agent/config.ini configuration file:


Property	Description
`server_host`	Name of the host where Cloudera Manager Server is running.
`server_port`	Port on the host where Cloudera Manager Server is running.

Start the Agents by running the following command on all hosts:
RHEL 7
```
sudo systemctl start cloudera-scm-agent
```
If the agent starts without errors, no response displays.
When the Agent starts, it contacts the Cloudera Manager Server. If communication fails between a Cloudera Manager Agent and Cloudera Manager Server, see Troubleshooting Installation Problems. When the Agent hosts reboot, cloudera-scm-agent starts automatically.