[CentOS] cluster - ip address lost when service stopped

Fabio Macchi fabio.macchi at area.it
Mon Dec 29 10:59:22 UTC 2008


Hi Gowrishankar,

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.

This is my cluster.conf

<?xml version="1.0" ?>
<cluster alias="cluster01" config_version="54" name="cluster01">
        <fence_daemon clean_start="1" post_fail_delay="0" post_join_delay="30"/>
        <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 name="httpd failover domain" ordered="0" restricted="1">
                                <failoverdomainnode name="AREA041" priority="1"/>
                        </failoverdomain>
                </failoverdomains>
                <resources>
                        <ip address="10.0.181.3" monitor_link="1"/>
                </resources>
                <service autostart="0" domain="httpd failover domain" name="Apache" recovery="disable">
                        <script file="/etc/rc.d/init.d/httpd" name="script httpd"/>
                        <ip ref="10.0.181.3"/>
                </service>
                <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=""/>
                        <ip address="10.0.181.4" monitor_link="1"/>
                </service>
        </rm>
</cluster>

Many thanks

Fabio



________________________________
From: centos-bounces at centos.org [mailto:centos-bounces at centos.org] On Behalf Of A Linux Fanatic
Sent: martedì 23 dicembre 2008 11:43
To: CentOS mailing list
Subject: Re: [CentOS] cluster - ip address lost when service stopped

Fabio Macchi wrote:



-----Original Message-----

From: centos-bounces at centos.org<mailto:centos-bounces at centos.org> [mailto:centos-bounces at centos.org] On Behalf Of A Linux Fanatic

Sent: martedì 23 dicembre 2008 06:08

To: CentOS mailing list

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



Fabio Macchi wrote:



Hi all,



I'm trying to setup a cluster of 2 machines with Centos 5.2 to host a

postfix+spamassassin+clamav+mailscanner service. Below cluster

software versions



rgmanager.i386 2.0.38-2.el5_2.1 installed



cman.i386 2.0.84-2.el5_2.2 installed



Every machine (hp blade server ) has 4 interfaces, bounded in this way:



Eth0, eth1 -> bond0 -> connection for public service ( 10.0.181.x )



Eth2,eth3 -> bond1 -> connection for intra-cluster communication (

192.168.44.x )



bond0 Link encap:Ethernet HWaddr 00:21:5A:48:DA:BE



inet addr:10.0.181.41 Bcast:10.0.181.255 Mask:255.255.255.0



inet6 addr: fe80::221:5aff:fe48:dabe/64 Scope:Link



UP BROADCAST RUNNING MASTER MULTICAST MTU:1500 Metric:1



RX packets:85 errors:0 dropped:0 overruns:0 frame:0



TX packets:86 errors:0 dropped:0 overruns:0 carrier:0



collisions:0 txqueuelen:0



RX bytes:12963 (12.6 KiB) TX bytes:9144 (8.9 KiB)



bond1 Link encap:Ethernet HWaddr 00:1F:29:6D:7D:08



inet addr:192.168.44.41 Bcast:192.168.44.255 Mask:255.255.255.0



inet6 addr: fe80::21f:29ff:fe6d:7d08/64 Scope:Link



UP BROADCAST RUNNING MASTER MULTICAST MTU:1500 Metric:1



RX packets:29 errors:0 dropped:0 overruns:0 frame:0



TX packets:223 errors:0 dropped:0 overruns:0 carrier:0



collisions:0 txqueuelen:0



RX bytes:4612 (4.5 KiB) TX bytes:31746 (31.0 KiB)



Then I've created a new Mail service with these local resources:



- Ip address 10.0.181.3



- Script /etc/rc.d/init.d/MailScanner



- GFS file system on a SAN



Service start, but the problem is that, when I stop the service,

external ip address is removed from bond0.









Hi Fabio,



Could you please attach the following files:



/etc/sysconfig/network-scripts/ifcfg-bond0

/etc/sysconfig/network-scripts/ifcfg-bond1

/etc/sysconfig/network-scripts/ifcfg-eth0

/etc/sysconfig/network-scripts/ifcfg-eth1

/etc/sysconfig/network-scripts/ifcfg-eth2

/etc/sysconfig/network-scripts/ifcfg-eth3

/etc/cluster/cluster.conf



And "external ip address is removed from bond0." - I assume here

external IP is 10.0.181.41, right?



Thanks

Gowrishankar Rajaiyan | A Linux Fanatic.

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CentOS at centos.org<mailto:CentOS at centos.org>

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Hi Gowrishankar,



requested files attached; you well understand, I mean ip 10.0.181.41 disappear ( below the output from ifconfig after I tried to stop the service)





bond0     Link encap:Ethernet  HWaddr 00:21:5A:48:DA:BE

          inet6 addr: fe80::221:5aff:fe48:dabe/64 Scope:Link

          UP BROADCAST RUNNING MASTER MULTICAST  MTU:1500  Metric:1

          RX packets:52958 errors:0 dropped:0 overruns:0 frame:0

          TX packets:7844 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:0

          RX bytes:4915061 (4.6 MiB)  TX bytes:4936239 (4.7 MiB)



Tks



Fabio



Hi Fabio



First, issue the command:

 $ rpm -qf /sbin/ifup

It will respond with a line of text starting with either "initscripts" or "sysconfig," followed by some numbers. This is the package that provides your network initialization scripts.

Next, to determine if your installation supports bonding, issue the command:

 $ grep ifenslave /sbin/ifup

If this returns any matches, then your initscripts or sysconfig has support for bonding.

Ref: http://www.linuxfoundation.org/en/Net:Bonding

Try configuring ifcfg-bondX using the contents described in the above link.



Thanks
Rajaiyan | A Linux Fanatic.

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