Installation guide

described in Section F.2, “ Configuring HA-LVM Failover with Tagging” .

F.1. Configuring HA-LVM Failover wit h CLVM (preferred, Red Hat

Ent erprise Linux 5.6 and lat er)

To set up HA-LVM failover (using the preferred CLVM variant), perform the following steps:

1. Ensure that your system is configured to support CLVM, which requires the following:

The High Availability Add-On and Resilient Storage Add-On are installed, including the

the cmirror package if the CLVM logical volumes are to be mirrored.

The locking_type parameter in the global section of the /etc/lvm/lvm.conf file is

set to the value '3'.

The High Availability Add-On and Resilient Storage Add-On software, including the clvmd

daemon, must be running. For CLVM mirroring, the cmirrord service must be started as

well.

2. Create the logical volume and file system using standard LVM and file system commands, as

in the following example.

# pvcreate /dev/sd[cde]1

# vgcreate -cy shared_vg /dev/sd[cde]1

# lvcreate -L 10G -n ha_lv shared_vg

# mkfs.ext3 /dev/shared_vg/ha_lv

# lvchange -an shared_vg/ha_lv

For information on creating LVM logical volumes, refer to Logical Volume Manager

Administration.

3. Edit the /etc/cluster/cluster.conf file to include the newly created logical volume as a

resource in one of your services. Alternately, you can use Co n g a or the ccs command to

configure LVM and file system resources for the cluster. The following is a sample resource

manager section from the /etc/cluster/cluster.conf file that configures a CLVM

logical volume as a cluster resource:

<rm>

</failoverdomain>

</failoverdomains>

<fs name="FS" device="/dev/shared_vg/ha-lv" force_fsck="0"

force_unmount="1" fsid="64050" fstype="ext3" mountpoint="/mnt" options=""

self_fence="0"/>

</resources>

High Availabilt y LVM (HA- LVM)

123