We have a pxe-bootable
live system to examine a node without touching the system on the harddrive.
It is basically a self-made chroot environment.
- start the script live.sh IP_address available in the git repository
It creates the right pxeboot configuration for the nodes (see pxe configuration)
- reboot of the node
- use serial over LAN (SOL) using the IPMI card
ipmitool -I lanplus -U user -P password -H IPMI_IP sol activate
- wait until you get a prompt
One could also enter the system using rsh, ssh (right now only from a node which has not the common known_hosts)
and via local access.
change or update the live system
The root-directory is a NFS
mount to the FAIserver in /srv/live.
Chroot into this directory: chroot /srv/live /bin/bash
Do necessary updates via aptitude
or similar ways. The live system is a lenny
The configuration is generated by the live.sh script.
The pxe configuration looks like this:
append root=/dev/nfs nfsroot=/srv/live,v3,tcp,rsize=32768,wsize=32768 ip=:::::eth1:dhcp console=ttyS1,19200n8
Since we want to use SOL the configuration of the serial entry is essential.
- 28 Aug 2008
| Title || Description of the pxe-bootable live system |
| Description || This page explains the usage of the pxe-bootable live system which can be used to examine a node without touching its harddrive. |
| Tags || pxe live system |
| Category || Admin |