Open Stack

Hi,

we're running sahara-ci on both Neutron and Nova-network, so, I think that
it's probably some random / temp issue.

On Thu, Jun 11, 2015 at 6:41 PM, Chen, Ken <ken.chen at intel.com> wrote:

> I built a devstack cluster with neutron today, and the bug seemed
> disappear. So I guess it is a nova-network bug. Anybody met this before?
> VMs randomly lost network connection for a while from time to time if you
> are using nova-network.
>
> -Ken
>
> -----Original Message-----
> From: Chen, Ken [mailto:ken.chen at intel.com]
> Sent: Wednesday, June 10, 2015 10:57 AM
> To: openstack at lists.openstack.org
> Subject: [Openstack] [Sahara] [Network] instance cannot be connected some
> time after created
>
> Hi all,
> Recently I am using Sahara/Heat to create clusters in my own devstack
> setup (we do not install neutron and n-net is used). Some instances
> randomly could not be connected via ssh with "Broken pipe" messages, and
> reconnecting to it will report "Permission denied" (other connections like
> html are also disconnected). This will cause the whole cluster down.
>
> ubuntu at c1-cdhmaster54-001:~$ Write failed: Broken pipe stack at ken-stack:~$
> ssh -i /home/stack/ken.key -o StrictHostKeyChecking=no -o
> UserKnownHostsFile=/dev/null -l ubuntu 192.168.234.226
> Warning: Permanently added '192.168.234.226' (ECDSA) to the list of known
> hosts.
> Permission denied (publickey).
>
> However, after several minutes, the instance can be connected again!
> stack at ken-stack:~$ ssh -i /home/stack/ken.key -o StrictHostKeyChecking=no
> -o UserKnownHostsFile=/dev/null -l ubuntu 192.168.234.226
> Warning: Permanently added '192.168.234.226' (ECDSA) to the list of known
> hosts.
> Welcome to Ubuntu 12.04.5 LTS (GNU/Linux 3.2.0-84-virtual x86_64)
>
>  * Documentation:  https://help.ubuntu.com/
>
>   System information as of Wed Jun 10 02:52:59 UTC 2015
>
>   System load:  0.29               Processes:           101
>   Usage of /:   13.4% of 37.51GB   Users logged in:     1
>   Memory usage: 49%                IP address for eth0: 10.11.12.2
>   Swap usage:   0%
>
>   Graph this data and manage this system at:
>     https://landscape.canonical.com/
>
>   Get cloud support with Ubuntu Advantage Cloud Guest:
>     http://www.ubuntu.com/business/services/cloud
>
> 0 packages can be updated.
> 0 updates are security updates.
>
> Last login: Wed Jun 10 02:52:09 2015 from 192.168.234.226
> ubuntu at c1-cdhmaster54-001:~$
>
> It is quite weird. Have any of you met this before, and give any
> suggestions? Thanks a lot.
>
> -Ken
>
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-- 
Sincerely yours,
Sergey Lukjanov
Sahara Technical Lead
(OpenStack Data Processing)
Principal Software Engineer
Mirantis Inc.
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