Installation Options

Manual Installation

You can also manually install the Open Shared Root Cluster. Please follow the instructions of this manual to do so.

Prerequisites

to be defined

Install Com.oonics packages

Install the latest comoonics rpms from a comoonics redhat-el5 yum channel:

    yum install comoonics-bootimage comoonics-cdsl-py comoonics-bootimage-extras-nfs comoonics-bootimage-listfiles-rhel5

You might also need other packages if needed use yum list comoonics

Create a cluster configuration file

Create a cluster configuration file /etc/cluster/cluster.conf with the com_info tags.

Note, that the following cluster configuration still needs a valid fencing configuration for a properly working cluster:

    <?xml version="1.0"?>
    <cluster config_version="1" name="axqad108" type="gfs">
     <clusternodes>
             <clusternode name="node1" nodeid="1" votes="1">
                     <com_info>
                             <rootvolume fstype="nfs" name="192.168.122.1:/home/marc/virtual/nfsosr/axqad108"/>
                             <eth name="eth0" ip="192.168.122.161" mac="00:0C:29:C9:C6:F5" mask="255.255.255.0" gateway="192.168.122.1"/>
                             <fenceackserver user="root" passwd="test123"/>
                     </com_info>
                     <fence>
                             <method name="1"/>
                     </fence>
             </clusternode>
             <clusternode name="node2" nodeid="2" votes="2">
                     <com_info>
                             <rootvolume fstype="nfs" name="192.168.122.1:/home/marc/virtual/nfsosr/axqad108"/>
                             <eth name="eth0" ip="192.168.122.162" mac="00:0C:29:C9:C6:F5" mask="255.255.255.0" gateway="192.168.122.1"/>
                             <fenceackserver user="root" passwd="test123"/>
                     </com_info>

                     <fence>
                             <method name="1"/>
                     </fence>
             </clusternode>
     </clusternodes>
    </cluster>

Create the shared root filesystem

The shared root filesystem must be a moutable nfs export as a shared nfs resource.::

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

    mount -t nfs -o nolock 192.168.122.1:/home/marc/virtual/nfsosr/axqad108 /mnt/newroot/  

(The nolock mountoption has been introduced because of issues regarding the cdsl tree creation.)

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

    cp -ax / /mnt/newroot/

Create some directories if need be:

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

Create a new cdsl infrastructure on the shared root filesystem:

    com-mkcdslinfrastructure -r /mnt/newroot

Mount the local cdsl infrastructure:

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

Make /var subdirs hostdependent:

    chroot /mnt/newroot
    com-mkcdsl -a -f /var/tmp/
    com-mkcdsl -a -f /var/account 
    com-mkcdsl -a -f /var/cache 
    com-mkcdsl -a -f /var/local 
    com-mkcdsl -a -f /var/lock 
    com-mkcdsl -a -f /var/log 
    com-mkcdsl -a -f /var/spool 
    com-mkcdsl -a -f /var/run
    com-mkcdsl -a -f /var/lib/dbus 
    com-mkcdsl -a -f /var/lib/dhclient

If you are planning to use the multipathd follow the instructions to be found here .

Make /etc/sysconfig/network hostdependent:

    chroot /mnt/newroot com-mkcdsl -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':

    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

Create boot configuration based on PXE or any other possibility.

Create Shared Root initrd

Create the shared root initrd into the shared boot filesystem:

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

Boot Cluster

Have Fun !!