[Users] problem with snmpd on veth

[Alexander Prinsier]

It's not a VLAN. I don't remember giving it a name myself. I thought
openvz somehow choose the name (since it's for VE 3003).

I edited the host_ifname in /etc/vz/conf/3003.conf to veth3003 instead
of veth3003.0 and it fixed it. Thanks for helping finding the error.

Alexander

Kirill Korotaev wrote:
> is it VLAN or you just gave veth that name?
> I guess snpmd tries to be too smart and assumes it is a VLAN... But maybe I'm wrong.
> 
> 
> Alexander Prinsier wrote:
>> I'm running snmpd/strace in the host.
>>
>> ip a l lists the interface 'veth3003.0'.
>>
>> Could this '.0' make a difference?
>>
>> Alexander
>>
>> Kirill Korotaev wrote:
>>> this ioctl() return ifindex by device name.
>>> where do you run this snpmd/strace? in host or in VE?
>>> obviously, there is no veth3003 device found, so the error was returned.
>>>
>>> what 'ip a l' commands shows when this happens?
>>>
>>> Kirill
>>>
>>> Alexander Prinsier wrote:
>>>> Hello,
>>>>
>>>> I'm seeing these error messages appear in my error log:
>>>>
>>>> Feb 10 14:37:04 h01 snmpd[18514]: ioctl 35123 returned -1
>>>>
>>>> I tried to get the cause of this error message:
>>>>
>>>> strace /usr/sbin/snmpd -Le -f -u snmp -I -smux -p /var/run/snmpd.pid
>>>> 127.0.0.1 > /root/snmpd.log 2>&1
>>>>
>>>> I could find this in the strace.log:
>>>>
>>>> socket(PF_INET, SOCK_DGRAM, IPPROTO_IP) = 10
>>>> ioctl(10, SIOCGIFINDEX, {ifr_name="eth0", ifr_index=6}) = 0
>>>> close(10)                               = 0
>>>> socket(PF_INET, SOCK_DGRAM, IPPROTO_IP) = 10
>>>> ioctl(10, SIOCGIFINDEX, {ifr_name="veth3003", ???}) = -1 ENODEV (No such
>>>> device)
>>>> write(2, "ioctl 35123 returned -1\n", 24ioctl 35123 returned -1
>>>> ) = 24
>>>> close(10)                               = 0
>>>>
>>>> veth3003 is associated with VE 3003, in which runs openvpn (don't think
>>>> that's relevant though).
>>>>
>>>> Anyone knows what this ioctl is for, and why it fails for veth3003?
>>>>
>>>> Thanks,
>>>>
>>>> Alexander
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>>