[Users] Arp update / sendarp in case of machine movement ?

[Christian Hofstaedtler]

* Robert Heinzmann <Robert.Heinzmann at 1und1.de> [090714 12:04]:
> Hello, 
> 
> I have a question regarding ARP updates. 
> 
> Network Setup: venet with proxy arp.
> 
> When movin a VE from one host to another (via DRBD: node1:shutdown,
> switch drbd , node2:start) the IP/MAC combination needs to be
> re-advertised so that the ARP caches are flushed. This can be done with
> "sendarp". Otherwise the host is not reachable.
> 
> Is this integrated into the OpenVZ command utilities ? How can I
> integrate this command that it alsways is running on: 
> 
> 1) Every VE start
> 2) Every IP add
> 
> My Idea: 
> 
> Custom add_net and vps.mount hook scripts, however because this such a
> general issue, I thing someone already found a elegang solution for this
> ? 

Default vzctl scripts already ship with exactly this feature set.
See
http://git.openvz.org/?p=vzctl;a=blob;f=scripts/vps-functions.in;h=bcc789380faf52a524abab3f0ec7fe55917ae8d1;hb=f18aada9e4aeff38240c543db31739d808b0e81a#l181
and 
http://git.openvz.org/?p=vzctl;a=blob;f=scripts/vps-net_add.in;h=31c307c1fa1102d79c3797317f104e8919db3c3f;hb=f18aada9e4aeff38240c543db31739d808b0e81a#l44

-ch

-- 
christian hofstaedtler