[Linux-cluster] How to run same service in parallel in RedHat Cluster 5.0

[Digimer]

On 09/28/2011 06:20 AM, Ruben Sajnovetzky wrote:
> <?xml version="1.0"?>
> <cluster alias="PPM_CL1" config_version="81" name="PPM_CL1">
>         <fence_daemon clean_start="0" post_fail_delay="0"
> post_join_delay="30"/>
>         <clusternodes>
>                 <clusternode name="server-87111" nodeid="1" votes="2">
>                         <fence/>
>                 </clusternode>
>                 <clusternode name="server-87112" nodeid="2" votes="1">
>                         <fence/>
>                 </clusternode>
>         </clusternodes>
>         <cman expected_votes="1">
>                 <multicast addr="224.4.5.6"/>
>         </cman>
>         <fencedevices/>
>         <rm>
>                 <failoverdomains>
>                         <failoverdomain name="PPM_GW_FDN" nofailback="1"
> ordered="0" restricted="1">
>                                 <failoverdomainnode name="server-87111"
> priority="1"/>
>                         </failoverdomain>
>                         <failoverdomain name="PPM_UNIT_FDN" nofailback="1"
> ordered="0" restricted="1">
>                                 <failoverdomainnode name="server-87112"
> priority="1"/>
>                         </failoverdomain>
>                 </failoverdomains>
>                 <resources>
>                         <ip address="10.116.159.105" monitor_link="1"/>
>                         <script file="/usr/local/bin/cluster/ppm_gw_ha"
> name="PPM_GW"/>
>                         <fs device="/dev/mapper/VolGroup00-optvol"
> force_fsck="1" force_unmount="0" fsid="36845" fstype="ext3"
> mountpoint="/opt" name="PPM_OPT_FS" self_fence="0"/>
>                         <apache config_file="conf/httpd.conf" name="web"
> server_root="/etc/httpd" shutdown_wait="0"/>
>                         <clusterfs device="/dev/hdd" force_unmount="0"
> fsid="20023" fstype="gfs" mountpoint="/mnt" name="pru1" self_fence="0"/>
>                 </resources>
>                 <service autostart="0" exclusive="0" name="PPM_PRUEBA"/>
>                 <service autostart="0" domain="PPM_UNIT_FDN" exclusive="0"
> name="PPM Units">
>                         <fs ref="PPM_OPT_FS"/>
>                 </service>
>                 <service autostart="0" domain="PPM_GW_FDN" exclusive="0"
> name="PPM Gateway">
>                         <fs ref="PPM_OPT_FS">
>                                 <ip ref="10.116.159.105">
>                                         <script ref="PPM_GW"/>
>                                 </ip>
>                         </fs>
>                 </service>
>         </rm>
> </cluster>

Ah, here it is.

If I can recommend, remove the parts you're not yet using (the empty
service, the apache resource, etc). Remove any options that aren't
critical... make it as simple as possible. Once you get it working, you
can start adding things back.

As an aside, with the config you have, the IP address will never
migrate. It will come up on and only ever run on PPM_GW_FDN. Also, it
will not come up if the fs resource fails as it is a child. This may be
what you want though.

Also, you *must* configure fencing. Even without a shared file system, a
fence call will hang the cluster. It can cause many odd symptoms. Get
fencing configured and working, strip down the config and try again. If
it still fails, repost the config as it is at that point.

-- 
Digimer
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