[Linux-cluster] Re: help with fence_xvmd

[vu pham]

ESGLinux wrote:
> Hi again,
> 
> I have found that when I run the comand this way:
> fence_xvmd -fddddd -I vnet0
> Debugging threshold is now 5
> -- args @ 0xbfa1cb58 --
>   args->addr = 225.0.0.12
>   args->domain = (null)
>   args->key_file = /etc/cluster/fence_xvm.key
>   args->op = 2
>   args->hash = 2
>   args->auth = 2
>   args->port = 1229
>   args->ifindex = 4
>   args->family = 2
>   args->timeout = 30
>   args->retr_time = 20
>   args->flags = 1
>   args->debug = 5
> -- end args --
> Reading in key file /etc/cluster/fence_xvm.key into 0xbfa1bb58 (4096 max 
> size)
> Actual key length = 4096 bytesOpened ckpt vm_states
> Setting up ipv4 multicast receive (225.0.0.12:1229 <http://225.0.0.12:1229>)
> Joining multicast group
> ipv4_recv_sk: success, fd = 7
> My Node ID = 1
> Domain                   UUID                                 Owner State
> ------                   ----                                 ----- -----
> Domain-0                 00000000-0000-0000-0000-000000000000 00001 00001
> NODO1                    73f4ab26-62de-732d-e5a2-1eb1740840ec 00001 00002
> NODO2                    73f4ab26-62de-732d-e5a2-1eb1740840ed 00001 00002
> Storing NODO1
> Storing NODO2
> ........
> 
> But when I try to fence the from the node:
> fence_xvm -H NODO2 -ddd -o null
> Debugging threshold is now 3
> -- args @ 0xbfed88bc --
>   args->addr = 225.0.0.12
>   args->domain = NODO2
>   args->key_file = /etc/cluster/fence_xvm.key
>   args->op = 0
>   args->hash = 2
>   args->auth = 2
>   args->port = 1229
>   args->ifindex = 0
>   args->family = 2
>   args->timeout = 30
>   args->retr_time = 20
>   args->flags = 0
>   args->debug = 3
> -- end args --
> Reading in key file /etc/cluster/fence_xvm.key into 0xbfed786c (4096 max 
> size)
> Actual key length = 4096 bytesSending to 225.0.0.12 via 127.0.0.1
> Sending to 225.0.0.12 via 192.168.1.186
> Sending to 225.0.0.12 via 192.168.1.187
> Sending to 225.0.0.12 via 10.0.0.1
> Sending to 225.0.0.12 via 192.168.122.1
> Waiting for connection from XVM host daemon.
> .....
> Timed out waiting for response
> 
> and doesn´t fence.
> 
> 

So your vm hosts are not on the eth0 network of Domain-0, but they are 
on the private network. IIRC, fence_xvmd listens, by default, on eth0.

You can overcome this by, if you use RHEL 5.3, adding -I vnet0 ( or 
whatever device which domain-0 uses to communicate with domU ) into the 
fence_xvmd 's parameter list .IIRC, this parm -I does not exist on RHEL 
5.2 or ealier. You can do that by adding FENCE_XVMD_OPTS="-I vnet0" into 
/etc/sysconfig/cman.

hth,
Vu