[Bug 997978] Re: KVM images lose connectivity with bridged network

[Christian Parpart]

I am having the same issue, and gave an in-depth inspection in my
report: bug 1016848

I am running version Essex 2012.1, and networking in VlanManager mode, a
dedicated nova-network gateway, KVM and virt-type, Ubuntu 12.04 Precise,
and run into this incident in up to every 1-2 days, yesterday even twice
within 3 hours.

One symptom may be high networking traffic I/O on the given KVM
instance.

Until now, I worked around by `nova reboot $instance_name`.

bradleyd (bradleydsmith), what exactly did you mean by ifdown & ifup?
the vnet%d interface or the bridge (e.g. br100) ? What interface did you
re-up? -- for the mean time, I'd like to write a tiny daemon that runs
on the hypervisor nodes, to check every N secs whether or not it can
PING the KVM, and if not, it is to re-up its underlying network
interface.

Serge Hallyn, I'd like to assist in whatever you need to get this beast
fixed, since for me this is also a very major incident, too, and I just
can't add more production services until knowing the OpenStack-stack is
functioning well. So please tell me what I can provide you with. :-)

Regards,
Christian.

-- 
You received this bug notification because you are a member of Ubuntu
Server Team, which is subscribed to bridge-utils in Ubuntu.
https://bugs.launchpad.net/bugs/997978

Title:
  KVM images lose connectivity with bridged network

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/bridge-utils/+bug/997978/+subscriptions