====== RHEL/CentOS Clustering ======

===== Setup =====

=== Install ===

  - Run: <code># yum installgroup Clustering</code>
    * RHEL: <code>yum groupinstall Clustering</code>
  - Run: <code># yum install xauth</code>
  - For use with vmware-server, you need the VMware VIX API (on both the clients and vm host)

=== Configuration ===

  - Do this: <code>$ ssh -Y root@node1
# system-config-cluster</code>
  - Setup a fencing device (see [[#vmware fencing]] for more info)
  - Setup your nodes
  - Setup the failover domain (''httpd'' or something like that)
  - Setup the resources to be clustered
  - Setup the service
  - Enable the cluster management software (''cman'' and ''rgmanager''):
    - Centos: <code># chkconfig cman on
# chkconfig rgmanager on
# chkconfig openais on</code>
    - RHEL5: <code># chkconfig cman on
# chkconfig rgmanager on
# chkconfig openais off</code>
  - Reboot
  - check the status of the cluster (same command as step 1)

== vmware fencing ==

  - get ''fence_vmware'' setup with vmware-server2: <code># fence_vmware -a 192.168.1.3:8333 -l USER -p PASSWORD -d server2 -n '[estore] node2/node2.vmx'</code>
  - You'll use this info later when editing ''/etc/cluster/cluster.conf''



  - setup centos vm image for web serving: <code># yum install httpd mod_ssl php mysql-server php-mysql php-pear-DB php-xml php-xmlrpc php-gd php-mbstring sendmail-cf</code>


===== Relocate Services =====


<code># clusvcadm -r wiki-httpd</code>


===== Services =====

  * RHEL5:<code>cman
cmirror
rgmanager
modclusterd
ricci
tog-pegasus</code>
===== Links/Info =====

  * [[http://www.redhat.com/docs/manuals/csgfs/browse/rh-cs-en/index.html|RedHat Clustering Setup Guide]]
  * [[http://sources.redhat.com/cluster/wiki/VMware_FencingConfig|RedHat vmware fencing info]]
  * [[http://www.redhat.com/docs/manuals/csgfs/|Other RHEL docs]]


==

{{tag>:linux:server :linux}}