Re: [CentOS] cluster - ip address lost when service stopped

[Jay Leafey]

Fabio Macchi wrote:

Hi Gowrishankar,



This is my cluster.conf

<?xml version="1.0" ?>
<cluster alias="cluster01" config_version="54" name="cluster01">

        <clusternodes>
                <clusternode name="AREA041" nodeid="2" votes="1">
                        <fence/>
                </clusternode>
                <clusternode name="AREA042" nodeid="3" votes="1">
                        <fence/>
                </clusternode>
        </clusternodes>
        <cman expected_votes="1" two_node="1"/>
        <fencedevices/>
        <rm>
                <failoverdomains>

                        </failoverdomain>
                </failoverdomains>
                <resources>
                        <ip address="10.0.181.3" monitor_link="1"/>
                </resources>

                        <ip ref="10.0.181.3"/>
                </service>

                        <ip address="10.0.181.4" monitor_link="1"/>
                </service>
        </rm>
</cluster>

Many thanks

this problem seems to be related to cluster, not to bonding: bonding is working correctly, anyway I’ve tryied a test removing bonding, and I experience the same problem directly on interface eth0. <fence_daemon clean_start="1" post_fail_delay="0" post_join_delay="30"/> <failoverdomain name="httpd failover domain" ordered="0" restricted="1"> <failoverdomainnode name="AREA041" priority="1"/> <service autostart="0" domain="httpd failover domain" name="Apache" recovery="disable"> <script file="/etc/rc.d/init.d/httpd" name="script httpd"/> <service autostart="0" domain="httpd failover domain" name="Service Mail" recovery="disable"> <script file="/etc/rc.d/init.d/MailScanner" name="MailScanner"/> <clusterfs device="/dev/DATI_MAIL/DATI_MAIL" force_unmount="1" fsid="5845" fstype="gfs2" mountpoint="/dati_mail" name="Share_dati_mail" options=""/>

Hope that helps!
--
Jay Leafey - Memphis, TN
jay.lea...@mindless.com

From what I can tell, the behaviour you are noticing is consistent with your cluster.conf file. Since you have made the IP addresses part of the service definitions, the IP would "go away" when the associated service is stopped. If the service moved to another node, however, the IP would be enabled on the host to which the service was moved. If you want the IP addresses to be independent of the service state, then add them using files in /etc/sysconfig/network-scripts to define the "alias" addresses and remove them from your service definitions. See /usr/share/doc/initscripts-*/sysconfig.txt for details on how to set up the alias addresses. I'm doing something similar with IP addresses in a cluster, but I WANT the IP address to migrate to the target host when a service is moved from one node in the cluster to another. I have the IP address resources tied to the individual services to make that happen.

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