HP Insight Cluster Management Utility Activating the diskless feature, Creating a diskless image

user	= root
server	= /usr/sbin/in.tftpd
server_args	= /tftpboot /opt/cmu/ntbt/tftp -v
per_source	= 11
cps	= 100 2
flags	= IPv4

}

4.Restart xinetd to reload the TFTP configuration.

#/etc/init.d/xinetd restart

4.8.5Activating the diskless feature

1.Edit /opt/cmu/etc/cmuserver.conf to activate CMU_DISKLESS:

#cmu diskless feature true/false CMU_DISKLESS=true

2.Restart the HP Insight CMU server:

#/etc/init.d/cmu restart

4.8.6Populating the HP Insight CMU database

IMPORTANT: If your cluster contains more than 256 diskless nodes, then HP recommends that you configure additional NFS servers before proceeding to this section. To configure additional NFS servers, follow the instructions in “Configuring additional NFS servers” (page 63), then return to this section.

Register nodes into the HP Insight CMU database using the scan-node process, as described in “Scanning nodes” (page 36).

4.8.7Creating a diskless image

1.Verify the golden node is running.

2.Verify you have enough space on your head node in /opt/cmu/image to contain a copy of all local file systems currently mounted on your golden node.

3.To configure ssh passwordless between your head node and your compute node for the root user, add the content of /root/.ssh/id_rsa.pub on the administration server into the

/root/.ssh/authorizedKeys file on the golden node.

#/opt/cmu/tools/copy_ssh_keys.exp ip_golden_node

Enter the root password (not echoed).

4.If you want to use monitoring, you must install the compute node monitoring rpm on the golden node before creating the diskless logical group.

5.To avoid collectl disk I/O operation, if you want to use the collectl option for monitoring, verify that collectl is configured to not log to the disk. For details, see “Installing and starting collectl on compute nodes” (page 81).

4.8.8Creating a diskless logical group

From the GUI

1.In the Logical Group Management window, click the Add button.

2.Add a new logical group.

4.8 HP Insight CMU diskless environments 57