biolocal:Diskless

From Wiki CEINGE

Create a new diskless OS

• NFS server configuration

On 143.225.151.72 (storagesrv2) there are 2 LUNs available for diskless OSes:

Create filesystems:

and run the command:

/root/config_os_partitions.sh oslabel dev_for_root dev_for_snapshots ex: /root/config_os_partitions.sh centos5sge /dev/emcpowerk7 /dev/emcpowerl7

It makes the directories

/diskless/i386/$oslabel/root
/diskless/i386/$oslabel/snapshot

and mount the devices on them.

• OS creation

Rsync the installed os from an existing disk to /diskless/i386/$oslabel/root

Export the root and snapshot directories to a new network.

echo "/diskless/i386/centos5sge/root  192.168.151.43(rw,sync,no_root_squash)" >> /etc/exports
echo "/diskless/i386/centos5sge/root 192.168.129.0/24(ro,sync,no_root_squash)" >> /etc/exports
echo "/diskless/i386/centos5sge/snapshot     192.168.129.0/18(rw,sync,no_root_squash)" >> /etc/exports
exportfs -r

Register the new rootfs and the Os by using the web interface (http://mac-web.ceinge.unina.it/servers):

• • Create a rootfs
  • Create the OS; the OS should be linked to the created rootfs selecting the corresponding checkbox in the new os interface.

• Clustermanager setup

• • DHCP

Edit the file /etc/dhcpd.conf and insert a new network configuration:

                pool {
                        include "dhcpd.d/centos5sge/dhcpd.inc";
                        filename "centos5sge/pxelinux.0";
                        range 192.168.129.1 192.168.129.254;
                        }

In /etc/dhcpd.d create a new directory and the include file:

mkdir /etc/dhcpd.d/centos5sge
touch /etc/dhcpd.d/centos5sge/dhcpd.inc

• • tftserver

• • pxe

config_newos.sh centos5grid 192.168.151.125