[CentOS] cluster - ip address lost when service stopped

A Linux Fanatic linuxxpert at gmail.com
Tue Dec 23 10:42:46 UTC 2008


Fabio Macchi wrote:
> -----Original Message-----
> From: 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.
> _______________________________________________
> CentOS mailing list
> CentOS at centos.org
> http://lists.centos.org/mailman/listinfo/centos
>
>
>
> 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
Gowrishankar Rajaiyan | A Linux Fanatic.


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