[Openstack] Live migration with mult_host - only ugly approach?
이준원 (Joonwon Lee)
joonwon7.lee at samsung.com
Mon Dec 26 09:23:21 UTC 2011
We want to use Kei's live migration feature while adopting Vish’s
multi_host network configuration, but there are problems as noted below by
Is there any way to change the gateway of a VM instance?
(i.e. is it possible to force a VM instance to request DHCP server again?)
As I found no clue on this, it may be better to implement storing the
history of live migration in DB. And we should keep the iptables rules and
DHCP entries(in nova-br100.conf) for VM instances migrated in two or more
hosts. I'm going to take this *ugly* approach without a good idea.
The common gateway cannot be set for us because the network of
VMs(10.x.x.x) is different from the network of external
Also the minimum DHCP expiration time is 120 seconds according to the man
page. Two minutes are too long. Even worse, a VM instance won't change the
gateway set by DHCP until rebooting with my test.
Please help me finding a better approach, if any.
Thanks in advance.
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