Typically, HAM can be run on the NameNode. However, we recommend that you also install HAM on other nodes in the cluster because the NameNode will be restarted as part of the validation tests. Use the following command to install HAM:
For RHEL v5.x:
rpm -ivh hmonitor-vsphere-namenode-daemon-1.1.0.23.el5.x86_64.rpm
For RHEL v6.x:
rpm -ivh hmonitor-vsphere-namenode-daemon-1.1.0.23.el6.x86_64.rpm