HP Insight Cluster Management Utility Booting the compute nodes, Customizing your diskless image

4.8.10 Booting the compute nodes

From the GUI

1.Select the compute nodes you added to the diskless logical group.

2.Right-click to launch a boot command on these nodes.

3.Select network. The list of all the diskless images registered in HP Insight CMU appears. The cmu network image is also listed. The HP Insight CMU classic network boot image is used for cloning and backup.

Figure 29 Booting the compute nodes

4.In the list box, select your diskless image name, and then click OK. The compute nodes start on your diskless image.

From the CLI

Start the nodes as follows:

cmu> boot net "<myTestImage>" node1 - noden

4.8.11 Understanding the structure of a diskless image

Like every HP Insight CMU image, all directories and files related to an HP Insight CMU diskless image are stored in /opt/cmu/image/<imageName>.

A diskless image is composed of the following directories:

•root—Contains the root directory of the golden node and is mounted in read-only mode by the diskless compute nodes and used as '/'.

•snapshot—Contains one subdirectory per node. Each subdirectory is created when you register a node or a set of nodes into the diskless logical group and contains the files mounted in read/write mode for each compute node. Snapshot directories are populated as defined in the following files:

◦files—The list of files to be put in the per node snapshot directories. This list is provided by the diskless feature of HP Insight CMU. Do not modify this.

◦files.custom—Add to this file the list of custom files that you want to put in the per node snapshot directory.

When starting a node with a diskless image, HP Insight CMU modifies the dhcptab to network boot the nodes on the diskless image.

4.8.12 Customizing your diskless image

4.8.12.1files.custom

As described in “Understanding the structure of a diskless image” (page 60), add to files.custom the list of custom files you want to put in the per node snapshot directories.

60 Provisioning a cluster with HP Insight CMU