Fabio Macchi wrote: 
-----Original Message-----
From: centos-bounces@centos.org [mailto:centos-bounces@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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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.