Build OSR

Prerequisites

see below

Create the shared root filesystem

The shared root filesystem must be a logical volume on a shared storage device. Use gfs_mkfs to create the GFS filesystem:

    mkfs.ocfs2 -Losr /dev/xvdc

Mount the new filesystem to '/mnt/newroot':

    mount /dev/xvdc /mnt/newroot/  

Copy all data from the local installed RHEL5 root filesystem to the shared root filesystem:

    cp -ax / /mnt/newroot/

Create some directories:

    mkdir /mnt/newroot/proc
    mkdir /mnt/newroot/sys

Create a new cdsl infrastructure on the shared root filesystem:

    com-mkcdslinfrastructure -r /mnt/newroot -i

Mount the local cdsl infrastructure:

    mount --bind /mnt/newroot/cluster/cdsl/1/ /mnt/newroot/cdsl.local/

Make /var hostdependent:

    com-mkcdsl -r /mnt/newroot -a /var 

Make /var/lib shared again:

    com-mkcdsl -r /mnt/newroot -s /var/lib

Make /etc/sysconfig/network hostdependent:

    com-mkcdsl -r /mnt/newroot -a /etc/sysconfig/network

Create /etc/mtab link to '/proc/mounts':

    cd /mnt/newroot/etc/
    rm -f mtab
    ln -s /proc/mounts mtab

Remove cluster network configuration:

    rm -f /mnt/newroot/etc/sysconfig/network-scripts/ifcfg-eth0

Disable kudzu:

    chroot /mnt/newroot/ chkconfig kudzu --del

Modify '/mnt/newroot/etc/fstab':

    #/dev/vg_clurhel5_sr/lv_sharedroot  /           gfs     defaults        0 0
    #LABEL=/boot             /boot                   ext3    defaults        1 2
    devpts                  /dev/pts                devpts  gid=5,mode=620  0 0
    tmpfs                   /dev/shm                tmpfs   defaults        0 0
    proc                    /proc                   proc    defaults        0 0
   sysfs                   /sys                    sysfs   defaults        0 0
   /dev/vg_system/lv_swap  swap                    swap    defaults        0 0

Create shared bootdevice

Mount shared boot:

    mount /dev/xvdb1 /mnt/newroot/boot/

Copy boot:

    cp -a /boot/* /mnt/newroot/boot

create '/mnt/newroot/boot/grub/grub.conf':

    default=0
    timeout=5
    splashimage=(hd0,0)/grub/splash.xpm.gz
    hiddenmenu
    title Red Hat Enterprise Linux Server (2.6.18-92.el5xen)
        root (hd0,0)
        kernel /vmlinuz-2.6.18-92.el5xen ro root=/dev/xvdb console=xvc0
        initrd /initrd-2.6.18-92.el5xen.img
    title Red Hat Enterprise Linux Server (2.6.18-53.el5xen)
        root (hd0,0)
        kernel /vmlinuz-2.6.18-53.el5xen ro root=/dev/xvdb console=xvc0
        initrd /initrd-2.6.18-53.el5xen.img

Invoke grub shell:

    grub

Install grub:

    GNU GRUB  version 0.97  (640K lower / 3072K upper memory)

     [ Minimal BASH-like line editing is supported.  For the first word, TAB
       lists possible command completions.  Anywhere else TAB lists the possible
       completions of a device/filename.]

    grub> device (hd0) /dev/xvdb

    grub> root (hd0,0)
     Filesystem type is ext2fs, partition type 0x83

    grub> setup (hd0)
     Checking if "/boot/grub/stage1" exists... no
     Checking if "/grub/stage1" exists... yes
     Checking if "/grub/stage2" exists... yes
     Checking if "/grub/e2fs_stage1_5" exists... yes
     Running "embed /grub/e2fs_stage1_5 (hd0)"...  15 sectors are embedded.
    succeeded
     Running "install /grub/stage1 (hd0) (hd0)1+15 p     (hd0,0)/grub/stage2 /grub/grub.conf"... succeeded
    Done.

Create Shared Root initrd

Create ocfs2-tools depfile /etc/comoonics/bootimage/rpms.initrd.d/ocfs2.list:

     [root@vgenerix5 ~]# cat /etc/comoonics/bootimage/rpms.initrd.d/ocfs2.list
     ocfs2-tools

Create the shared root initrd into the shared boot filesystem:

    /opt/atix/comoonics-bootimage/mkinitrd -f /mnt/newroot/boot/initrd-$(uname -r).img $(uname -r)

Boot Cluster

Have Fun !!