[Linux-cluster] Ethernet Channel Bonding Configuration Clarification is Needed

[Stevan Colaco]

Hello Balaji,

Before looking into Cluter setup, is th Channel ethernet bonding working OK?

1) have you set the alias entry for bond0 interface in /etc/modprobe.conf ??
[root at web2 ~]# cat /etc/modprobe.conf
alias bond0 bonding
options bond0 mode=1 miimon=100 use_carrier=0
#

2) is the bonding module loaded?
[root at web2 ~]# lsmod | grep -i bonding
bonding                72252  0
[root at web2 ~]#

3) if not then load the module
 #modprobe bonding
#lsmod | grep -i bonding
#make sure the channel bonding is module is loaded.

4) ifdown bond0 OR #ifdown eth0

5) below are my server Ifcfg config files, compare your config files with them.

[root at web2 network-scripts]# cat ifcfg-eth0
DEVICE=eth0
BOOTPROTO=none
ONBOOT=yes
SLAVE=yes
MASTER=bond0
HWADDR=00:1C:C4:BE:8C:70
[root at web2 network-scripts]#

[root at web2 network-scripts]# cat ifcfg-eth1
DEVICE=eth1
BOOTPROTO=none
ONBOOT=yes
SLAVE=yes
MASTER=bond0
HWADDR=00:1C:C4:BE:8C:7E
[root at web2 network-scripts]#

[root at web2 network-scripts]# cat ifcfg-bond0
DEVICE=bond0
BOOTPROTO=static
IPADDR=10.10.1.91
NETMASK=255.255.255.128
ONBOOT=yes
[root at web2 network-scripts]#

6) restart network service
#service network restart

7) verify bond0 interface works fine...

#ip addr list  ----> look for bond0, eth0 and eth1 interfaces

[root at web2 network-scripts]# cat /proc/net/bonding/bond0
Ethernet Channel Bonding Driver: v2.6.3-rh (June 8, 2005)

Bonding Mode: fault-tolerance (active-backup)
Primary Slave: None
Currently Active Slave: eth0
MII Status: up
MII Polling Interval (ms): 100
Up Delay (ms): 0
Down Delay (ms): 0

Slave Interface: eth0
MII Status: up
Link Failure Count: 0
Permanent HW addr: 00:1c:c4:be:8c:70

Slave Interface: eth1
MII Status: up
Link Failure Count: 0
Permanent HW addr: 00:1c:c4:be:8c:7e
[root at web2 network-scripts]#

Regards,
-Stevan Colaco




On Tue, Sep 16, 2008 at 9:07 AM, Neependra Khare <nkhare.lists at gmail.com> wrote:
> Hello Balaji,
>>
>>
>> After i am rebooted both the server then cluster node becomes simplex and
>> Services are started on both the nodes
>> The cluster output in primary node
>>
>> Member Status: Quorate
>>
>> Member Name                              Status
>> -----------                             ---------
>> primary                                 Online, Local, rgmanager
>> secondary                               Offline
>>
>> Service Name         Owner (Last)                   State
>> ------------         ------------                  --------
>> Service              primary                        started
>>
>> The cluster output in secondary node
>>
>> Member Status: Quorate
>>
>> Member Name                              Status
>> -----------                             ---------
>> primary                                 Offline
>> secondary                               Online, Local, rgmanager
>>
>> Service Name         Owner (Last)                   State
>> ------------         --------------                --------
>> Service              secondary                     started
>
> This looks like a typical split brain condition.
> http://sources.redhat.com/cluster/faq.html#split_brain
>
> Is this only happening when you use bonding?
>
> Make sure that both nodes are able to communicate with each other.
> Check out the logs and configuration.If you can't figure it out then send
> "/etc/hosts", cluster config file and related logs.
>
> Neependra
>
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