A completely separate potential cause - make sure the time is synchronized 
between the various hosts. I significant discrepancy there (over 30 seconds I 
think), will also result in the services thinking they're offline.

-joe (this one from hard experience)

On May 16, 2012, at 6:48 AM, Gurjar, Unmesh wrote:
> Restarting libvirt service seemed to resolve the issue for me in the past.
>  
> Thanks & Regards,
> Unmesh Gurjar | Lead Engineer | Vertex Software Private Ltd. | w. 
> +91.20.6604.1500 x 379 | m. +91.982.324.7631 | unmesh.gur...@nttdata.com | 
> Follow us on Twitter@NTTDATAAmericas
>  
> From: Leander Bessa Beernaert [mailto:leande...@gmail.com] 
> Sent: Wednesday, May 16, 2012 5:54 PM
> To: Day, Phil
> Cc: Gurjar, Unmesh; openstack@lists.launchpad.net
> Subject: Re: [Openstack] [Compute] nova-compute does not show up as ":-)" in 
> nova-manage service list
>  
> I tried 'virsh list', and the command hangs. At first i thought it was 
> because of KVM, since the vm does not support it. I remember having the same 
> problem with diablo, but it would only result in error when the instance was 
> being launched on the compute service. So i changed "libvirt_type=kvm" to 
> "libvirt_type=qemu".
>  
> However, the problem still remains: "virsh list" still hangs and compute 
> refuses to leave the state "XXX".
> 
> On Wed, May 16, 2012 at 12:51 PM, Day, Phil <philip....@hp.com> wrote:
> So the things to check are:
>  
> -          Is the nova-compute service running ?  If not the nova-compute.log 
> should show why its failing
> 
>  
> -          If it is running then it probably means that its getting stuck on 
> some long running issue (e.g as down loading an image, problems talking to 
> libvirt, slow response from the DB, etc).     XXX in this case means that its 
> slow in updating its services entry rather than failed as such
> 
>  
> 
> Phil
>  
> From: openstack-bounces+philip.day=hp....@lists.launchpad.net 
> [mailto:openstack-bounces+philip.day=hp....@lists.launchpad.net] On Behalf 
> OfLeander Bessa Beernaert
> Sent: 16 May 2012 12:19
> To: Gurjar, Unmesh
> Cc: openstack@lists.launchpad.net
> Subject: Re: [Openstack] [Compute] nova-compute does not show up as ":-)" in 
> nova-manage service list
>  
> Shouldn't nova-network and nova-scheduler also fail then, since they share 
> the same config file? If so, that's not what's happening with me, only the 
> compute service is listed as "XXX".
> 
> On Wed, May 16, 2012 at 12:10 PM, Gurjar, Unmesh <unmesh.gur...@nttdata.com> 
> wrote:
> Hi Leander,
>  
> The issue is the Compute is not updating its heartbeat (services table in the 
> nova database), which is causing this.
> You probably need to check database connection string in the nova.conf on the 
>  Compute host and the db connection from the Compute host is working.
>  
> Thanks & Regards,
> Unmesh Gurjar | Lead Engineer | Vertex Software Private Ltd. | w. 
> +91.20.6604.1500 x 379 | m. +91.982.324.7631 | unmesh.gur...@nttdata.com | 
> Follow us on Twitter@NTTDATAAmericas
>  
> From: openstack-bounces+unmesh.gurjar=nttdata....@lists.launchpad.net 
> [mailto:openstack-bounces+unmesh.gurjar=nttdata....@lists.launchpad.net]On 
> Behalf Of Leander Bessa Beernaert
> Sent: Wednesday, May 16, 2012 4:30 PM
> To: openstack@lists.launchpad.net
> Subject: [Openstack] [Compute] nova-compute does not show up as ":-)" in 
> nova-manage service list
>  
> Hello,
>  
>  
> I can't get nova-compute to show up as ":-)" under 'nova-manager service 
> list'. I've checked the logs and can't find any error or warning. 
>  
> I'm using the default packages shipped with ubuntu 12.04 and have installed 
> everything in a virtual machine.
>  
> Regards,
>  
> Leander
> 
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