nodeset.8

Name

nodeset - set the boot state for a noderange

Synopsis

nodeset noderange osimage[=imagename] [--noupdateinitrd] [--ignorekernelchk]

nodeset noderange runimage=task

nodeset [-h | --help | -v | --version]

Description

nodeset sets the next boot state for a single or range of nodes or groups. It tells xCAT what you want to happen the next time the nodes are booted up. See noderange(3)|noderange.3. nodeset accomplishes this by changing the network boot files. Each xCAT node always boots from the network and downloads a boot file with instructions on what action to take next.

nodeset will manipulate the boot configuration files of xnba, grub2, petitboot, yaboot and pxelinux.0.

Assume that /tftpboot is the root for tftpd (set in site(5)|site.5).

nodeset for petitboot makes changes to /tftpboot/petitboot/{node name}

nodeset for xnba makes changes to /tftpboot/xcat/xnba/nodes/{node name}

nodeset for grub2 makes changes to /tftpboot/boot/grub2/{node name}

nodeset for pxe makes changes to /tftpboot/pxelinux.cfg/{node hex ip}

nodeset for yaboot makes changes to /tftpboot/etc/{node hex ip}

nodeset only sets the next boot state, but does not reboot.

nodeset is called by rinstall and winstall and is also called by the installation process remotely to set the boot state back to “boot”.

In a hierarchical cluster managed by service nodes, nodeset command is used to make sure compute node states are consistent on service and management nodes. When errors are reported, run the command with verbose mode. And the command will display additional service node information, which might be useful in identifying the problem.

A user can supply their own scripts to be run on the mn or on the service node (if a hierarchical cluster) for a node when the nodeset command is run. Such scripts are called prescripts. They should be copied to /install/prescripts directory. A table called prescripts is used to specify the scripts and their associated actions. The scripts to be run at the beginning of the nodeset command are stored in the ‘begin’ column of prescripts table. The scripts to be run at the end of the nodeset command are stored in the ‘end’ column of prescripts table. You can run ‘tabdump -d prescripts’ command for details. The following two environment variables will be passed to each script: NODES contains all the names of the nodes that need to run the script for and ACTION contains the current nodeset action. If #xCAT setting:MAX_INSTANCE=number is specified in the script, the script will get invoked for each node in parallel, but no more than number of instances will be invoked at a time. If it is not specified, the script will be invoked once for all the nodes.

Options

boot

Instruct network boot loader to be skipped, generally meaning boot to hard disk

offline

Cleanup the current pxe/tftp boot configuration files for the nodes requested

osimage | osimage=imagename

Prepare server for installing a node using the specified os image. The os image is defined in the osimage table and linuximage table. If the <imagename> is omitted, the os image name will be obtained from nodetype.provmethod for the node.

--noupdateinitrd

Skip the rebuilding of initrd when the ‘netdrivers’, ‘driverupdatesrc’ or ‘osupdatename’ were set for injecting new drivers to initrd. But, the geninitrd command should be run to rebuild the initrd for new drivers injecting. This is used to improve the performance of nodeset command.

--ignorekernelchk

Skip the kernel version checking when injecting drivers from osimage.driverupdatesrc. That means all drivers from osimage.driverupdatesrc will be injected to initrd for the specific target kernel.

runimage=task

If you would like to run a task after deployment, you can define that task with this attribute.

stat

Display the current boot loader config file description for the nodes requested. When disjointdhcps is set, using -a to display them on all available service nodes.

runcmd=command

This instructs the node to boot to the xCAT genesis environment and specified command to be executed.

shell

This instructs the node to boot to the xCAT genesis environment, and present a shell prompt on console. The node will also be able to be sshed into and have utilities such as wget, tftp, scp, nfs, and cifs. It will have storage drivers available for many common systems.

shutdown

To make the node to get into power off status. This status only can be used after runcmd and runimage to power off the node after the performing of operations.

-V | --verbose

Verbose mode.

-h | --help

Print help.

-v | --version

Print version.

Files

noderes table - xCAT node resources file. See noderes(5)|noderes.5 for further details.

nodetype table - xCAT node installation type file. See nodetype(5)|nodetype.5 for fur- ther details. This is used to determine the node installation image type.

site table - xCAT main configuration file. See site(5)|site.5 for further details. This is used to determine the location of the TFTP root directory and the TFTP xCAT subdirectory. /tftpboot and /tftpboot/xcat is the default.

Examples

To setup to install mycomputeimage on the compute node group.

nodeset compute osimage=mycomputeimage

To run http://$master/image.tgz after deployment:

nodeset $node runimage=http://$MASTER/image.tgz

Boot node1 into xCAT genesis environment and execute bmcsetup script. This causes the IP, netmask, gateway, username, and password to be programmed according to the configuration in node object definition.

rinstall node1 runcmd=bmcsetup