This is a typical LVS model.
Do not add your httpd script and mount script into source in your
cluster.conf
What you should do is :
1.add your node into cluster.conf (I dont confirm whether should add
fence device)
2.config your lvs.cf (in /etc/sysconfig/ha/)
3.test.
Alex wrote:
Hello all,
I have 3 real http servers running on centos-5.2 (rs1=192.168.113.3,
rs2=192.168.113.4, rs3=192.168.113.5) on which i want to mount some gfs2
volumes (mylv1 as /var/www/html and mylv2 as /var/www/cgi-bin).
In my present setup, rs1 is still missing (will be added later).
Using conga, i configured rs2 and rs3 to be part of "httpcluster".
On all real webservers, mylv1 and mylv2 volumes are accessible:
[root@rs2 ~]# lvscan
ACTIVE '/dev/myvg2/mylv2' [48.63 GB] inherit
ACTIVE '/dev/myvg1/mylv1' [48.63 GB] inherit
[root@rs2 ~]#
[root@rs3 ~]# lvscan
ACTIVE '/dev/myvg2/mylv2' [48.63 GB] inherit
ACTIVE '/dev/myvg1/mylv1' [48.63 GB] inherit
[root@rs3 ~]#
Using Conga and this howto, I added:
http://www.redhat.com/docs/manuals/enterprise/RHEL-5-manual/en-US/RHEL510/Cluster_Administration/s1-apache-inshttpd-CA.html
2 resources:
- httpd_script (type script, full_path_to_script=/etc/rc.d/init.d/httpd)
- docroot_gfs_mp (type gfs, mount_point=/var/www/html,
device=/dev/myvg1/mylv1)
2 services:
- http_service (which is linked to http_script resource and is responsible to
startup httpd servers aon all our nodes)
- docroot_mount (which is linked to docroot_gfs_mp and is responsible to mount
mylv1 on all our webservers in /var/www/html)
The main problem is that: httpd service is started only on one node (now on
rs2=192.168.113.4), and mylv1 is mounted in /var/www/html on the same node.
If this node become unusable (is rebooted), httpd service is started on rs3,
and mylv1 is mounted there.
What should be changed in my cluster.conf file, in order to have all httpd
servers started by "httpcluster" and mylv1 to be mounted in /var/www/html on
all our webservers?
Here comes my present cluster.conf file:
[root@rs2 ~]# cat /etc/cluster/cluster.conf
<?xml version="1.0"?>
<cluster alias="httpcluster" config_version="12" name="httpcluster">
<fence_daemon clean_start="0" post_fail_delay="0"
post_join_delay="3"/>
<clusternodes>
<clusternode name="192.168.113.5" nodeid="1" votes="1">
<fence/>
</clusternode>
<clusternode name="192.168.113.4" nodeid="2" votes="1">
<fence/>
</clusternode>
</clusternodes>
<cman expected_votes="1" two_node="1"/>
<fencedevices/>
<rm>
<failoverdomains/>
<resources>
<script file="/etc/rc.d/init.d/httpd"
name="httpd_script"/>
<clusterfs device="/dev/myvg1/mylv1" force_unmount="0"
fsid="35790" fstype="gfs2" mountpoint="/var/www/html" name="docroot_gfs_mp"
self_fence="0"/>
</resources>
<service autostart="1" exclusive="0" name="http_service">
<script ref="httpd_script"/>
</service>
<service autostart="1" exclusive="0" name="docroot_mount">
<clusterfs fstype="gfs2" ref="docroot_gfs_mp"/>
</service>
</rm>
</cluster>
[root@rs2 ~]#
Regards,
Alx
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