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 B<prescripts>. They should be copied to /install/prescripts dirctory. A table called I<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 I<prescripts> table. The scripts to be run at the end of the nodeset command are stored in the 'end' column of I<prescripts> table. You can run 'tabdump prescripts -d' 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 I<#xCAT setting:MAX_INSTANCE=number> is specified in the script, the script will get invoked for each node in parallel, but no more than I<number> of instances will be invoked at at a time. If it is not specified, the script will be invoked once for all the nodes.
install resources will be verified in tftp and the bulk transfer method (http, ftp, or nfs for example), and the boot loader configuration file will be written.
Prepare server for deploying statelite nodes. Statelite provides an efficient and flexible diskless solution because most of the OS image is NFS mounted read-only, but a configurable list of directories and files can be read-write. The read-write files can either be persistent across reboots, or volatile (restoring to pristine state after reboot). The configuration can be done through B<litefile>, B<litetree> and B<statelite> tables.
Prepare server for installing a node using the specified os image. The os image is defined in the I<osimage> table and I<linuximage> table. If the <imagename> is omitted, the os image name will be obtained from I<nodetype.provmethod> for the node.
Skip the rebuilding of initrd when the 'netdrivers', 'drvierupdatesrc' or 'osupdatename' were set for injecting new drviers 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.
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.
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.
To make the node to get into power off status. This status only can be used after B<runcmd> and B<runimage> to power off the node after the performing of operations.
