[Cluster-devel] Submitting lvm-cluster resource script

[Rafael Micó Miranda <rmicmirregs@gmail.com>]

Hi,

I previously submitted this to the list in the following thread:

https://www.redhat.com/archives/cluster-devel/2009-June/msg00020.html

I just want to submit a new version, the diff patch against the previous
version (which can be found in the older thread) and a readme file to
help people in the deployment and usage of the lvm-cluster resource
script.

md5sums:

fe6bf8a73ab059231172210f299f943d  lvm-cluster.sh
5c6679317e90af5c3cf933d972df20bb  patch-v1
f1dcd80729066bf57cc6743a16fcb261  README.txt

Cheers,

Rafael

-- 
Rafael Mic?? Miranda
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GENERAL INFORMATION:

LVM volume resource script for clusters, with ability to get exclusive access of
Logical Volumes. 
This is intended to be used with non-clustered filesystems, such as EXT3.

This way, you can define cluster services with filesystem resources with a 
protection to avoid the filesystems being mounted, by hand, in more than one 
node, avoiding corruption.

Tested and developed on:

RedHat Enterprise Linux 5.3 x86_64
cman-2.0.98-1.el5.x86_64
openais-0.80.3-22.el5.x86_64
rgmanager-2.0.46-1.el5.x86_64
lvm2-cluster-2.02.40-7.el5.x86_64

INSTALLATION:

Jut copy "lvm-cluster.sh" resource script into your resource scripts 
directory, usually /usr/share/cluster/

Keep an eye on the rights of the file just to be the
same as the others in the dir.

USAGE:

As part of the use of the lvm-cluster.sh resource script, you need to:

1.- Configure your multipathing software

2.- Configure properly the locking_type into lvm.conf to type 3 in all your 
systems.

3.- Create your Physical Volumes (PVs)

4.- Configure your Volume Groups (VGs) as clustered Volume Groups

5.- Create your Logical Volumes (LVs) into the clustered Volume Groups

6.- And, and the not so obvious, de-activate all the Logical Volumes you
plan to use as exclusive Logical Volumes (using exclusive flag).

De-activation can be done with "vgchange -an volgrp01/logvol01" or
similar command.

EXAMPLES:

Example of cluster.conf file content:

[...]
<resources>
	<ip address="172.26.2.1" monitor_link="1"/>
	<lvm-cluster name="logvol01" vg_name="volgrp01" lv_name="logvol01" exclusive="yes"/>
	<fs device="/dev/volgrp01/logvol01" force_fsck="1" force_unmount="1" fsid="40231" fstype="ext3" mountpoint="/imports/vol01" name="Filesystem01" options="" self_fence="1"/>
	<nfsexport name="/imports/vol01"/>
	<nfsclient name="Clients01" options="fsid=1001,async,no_root_squash,rw,mountpoint=/imports/vol01" path="/imports/vol01" target="172.26.0.80"/>
</resources>
<service autostart="1" domain="failoverdomain01" name="service01" recovery="restart">
	<lvm-cluster ref="logvol01">
		<fs ref="Filesystem01">
			<nfsexport ref="/imports/vol01">
				<nfsclient ref="Clients01"/>
			</nfsexport>
			<ip ref="172.26.2.1"/>
		</fs>
	</lvm-cluster>
</service>
[...]

CONTACT THE AUTHOR:

Send comments or feedback to Rafael Mic? (rmicmirregs [at] gmail (dot) com)
	
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