df.cluster at gmail
Aug 13, 2012, 1:35 AM
Post #3 of 4
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Re: corosync binding to 127.0.0.1 instead of correct interface
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Hi,
On Mon, Aug 13, 2012 at 11:10 AM, Bruno MACADRE
<bruno.macadre [at] univ-rouen> wrote:
> Hi,
>
> It's totaly normal 'cause your bindnetaddr doesn't correspond to any
> interface. I explain :
>
> The bindnetaddr parameter must contain a vlid network address (not IP
> address of the server but IP address of the network).
>
> On your server you've got 4 ethernet interfaces with their respective
> network adresse :
> eth0 => IP: 172.20.3.X NetIP: 172.20.3.0 Bcast: 172.20.3.63
> eth1 => IP: 172.20.76.X NetIP: 172.20.76.0 Bcast: 172.20.76.255
> eth2 => IP: 172.20.77.X NetIP: 172.20.77.0 Bcast: 172.20.77.255
> eth3 => IP: 192.168.0.61 NetIP: 192.168.0.0 Bcast: 192.168.0.255
Actually these are reversed, 192.168.x.x is set on eth1 and
172.20.77.x is on eth3.
>
> As you can see, the only one bindnetaddr that correspond to a valid
> NetIP is 192.168.0.0 so the behaviour is correct.
>
> If you want that corosync bind to eth0 you must replace 172.20.0.0 by
> 172.20.3.0 and all would work correctly.
Actually no. Binding to 127.0.0.1 usually occurs when it can't bind to
the correct interface, such as if you do a manual ifconfig ethx/bondx
down. Also, if in the bindnetaddr you but the actual IP address of the
interface, it works. If you put the network address, it's going to
search for the largest IP it finds. But there may be issues when
having subnets. Best choice would be to disable the automatic lookup
by just using the IP address in the bindnetaddr field.
>
> Regards,
> Bruno
>
> Le 13/08/2012 09:41, Ulrich Windl a écrit :
>> Hi!
>>
>> I have a problem with corosync as of SLES11 SP2 (current updates):
>>
>> Given these routing table:
>> # netstat -rn
>> Kernel IP routing table
>> Destination Gateway Genmask Flags MSS Window irtt Iface
>> 0.0.0.0 172.20.3.62 0.0.0.0 UG 0 0 0 eth0
>> 127.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0 lo
>> 172.20.3.0 0.0.0.0 255.255.255.192 U 0 0 0 eth0
>> 172.20.76.0 0.0.0.0 255.255.255.0 U 0 0 0 eth2
>> 172.20.77.0 0.0.0.0 255.255.255.0 U 0 0 0 eth3
>> 192.168.0.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1
>>
>> and this ring configuration:
>> interface {
>> bindnetaddr: 172.20.0.0
>> mcastaddr: 239.192.3.9
>> mcastport: 5405
>> ringnumber: 0
>> }
>> interface {
>> mcastaddr: 239.192.3.109
>> mcastport: 5405
>> bindnetaddr: 192.168.0.0
>> ringnumber: 1
>> }
>>
>> I get:
>> # corosync-cfgtool -s
>> Printing ring status.
>> Local node ID 16777343
>> RING ID 0
>> id = 127.0.0.1
>> status = ring 0 active with no faults
>> RING ID 1
>> id = 192.168.0.61
>> status = ring 1 active with no faults
>>
>> So why isn't corosync using eth0 as interface? for ring 0? In this configuration nodes cannot join the cluster. I couldn't find any error or warning during initial startup regarding the choice of the network address/interface. I guess there's a bug in it.
More likely a configuration issue.
HTH
>> corosync-1.4.1-0.13.1
>> pacemaker-1.1.6-1.29.1
>>
>> Regards,
>> Ulrich
>>
>>
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>>
>
>
> --
>
> Bruno MACADRE
> -------------------------------------------------------------------
> Ingénieur Systèmes et Réseau | Systems and Network Engineer
> Département Informatique | Department of computer science
> Responsable Réseau et Téléphonie | Telecom and Network Manager
> Université de Rouen | University of Rouen
> -------------------------------------------------------------------
> Coordonnées / Contact :
> Université de Rouen
> Faculté des Sciences et Techniques - Madrillet
> Avenue de l'Université - BP12
> 76801 St Etienne du Rouvray CEDEX
> FRANCE
>
> Tél : +33 (0)2-32-95-51-86
> Fax : +33 (0)2-32-95-51-87
> -------------------------------------------------------------------
>
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> See also: http://linux-ha.org/ReportingProblems
--
Dan Frincu
CCNA, RHCE
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