Open Stack

This is only if you're using the controllers to serve as a gateway to 
the Internet or to direct incoming traffic to the VMs.

If you use a VLAN only network configuration to offload the gateway to 
an external device (router or l3 switch) or you use Neutron in DVR mode, 
this shouldn't be an issue.

On 04/13/2017 10:49 AM, Konstantin Raskoshnyi wrote:
> If all controllers are down - nova is down and vms won't be able to
> access network
>
> On Thu, Apr 13, 2017 at 5:33 AM Adam Lawson <alawson at aqorn.com
> <mailto:alawson at aqorn.com>> wrote:
>
>     Another FYI, OpenStack services don't have to be running to access a
>     virtual machine. Period. Amy other condition that prevents this is a
>     serious design flaw.
>
>     //adam
>
>     On Apr 13, 2017 5:31 AM, wrote:
>
>         Fyi, the idea of controllers are a bit of a misnomer. You should
>         have redundant services; they don't necessarily need to be on
>         the same box. Since your asking as a new user. Have fun!
>
>         //adam
>
>         On Apr 12, 2017 5:27 PM, "Konstantin Raskoshnyi"
>         <konrasko at gmail.com <mailto:konrasko at gmail.com>> wrote:
>
>             Yes, machines are still running, but since neutron is down
>             none of them can be accessible.
>
>             On Wed, Apr 12, 2017 at 5:10 PM ron ramos <nhadie at gmail.com
>             <mailto:nhadie at gmail.com>> wrote:
>
>                 hi,
>
>                 depends on what you mean by inaccessible, your VM is
>                 probably still up and running on the compute node. but
>                 you won't be able to access them remotely as your
>                 controller node ( which is hosting neutron ) is down.
>
>                 regards,
>                 nhadie
>
>
>                 On Apr 12, 2017 11:31, "Konstantin Raskoshnyi"
>                 <konrasko at gmail.com <mailto:konrasko at gmail.com>> wrote:
>
>                     Hi guys,
>                     I'm new to openstack.
>                     Installed mirantis os 9,
>                     If one of controllers goes down - vm machines are
>                     not accesible, I though openstack supposed to work
>                     even if one controller is alive
>
>                     Any thoughts?
>
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