<div dir="ltr">Hi,<div><br></div><div>we're running sahara-ci on both Neutron and Nova-network, so, I think that it's probably some random / temp issue.</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Jun 11, 2015 at 6:41 PM, Chen, Ken <span dir="ltr"><<a href="mailto:ken.chen@intel.com" target="_blank">ken.chen@intel.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">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.<br>
<span class="HOEnZb"><font color="#888888"><br>
-Ken<br>
</font></span><div class="HOEnZb"><div class="h5"><br>
-----Original Message-----<br>
From: Chen, Ken [mailto:<a href="mailto:ken.chen@intel.com">ken.chen@intel.com</a>]<br>
Sent: Wednesday, June 10, 2015 10:57 AM<br>
To: <a href="mailto:openstack@lists.openstack.org">openstack@lists.openstack.org</a><br>
Subject: [Openstack] [Sahara] [Network] instance cannot be connected some time after created<br>
<br>
Hi all,<br>
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.<br>
<br>
ubuntu@c1-cdhmaster54-001:~$ Write failed: Broken pipe stack@ken-stack:~$ ssh -i /home/stack/ken.key -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -l ubuntu 192.168.234.226<br>
Warning: Permanently added '192.168.234.226' (ECDSA) to the list of known hosts.<br>
Permission denied (publickey).<br>
<br>
However, after several minutes, the instance can be connected again!<br>
stack@ken-stack:~$ ssh -i /home/stack/ken.key -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -l ubuntu 192.168.234.226<br>
Warning: Permanently added '192.168.234.226' (ECDSA) to the list of known hosts.<br>
Welcome to Ubuntu 12.04.5 LTS (GNU/Linux 3.2.0-84-virtual x86_64)<br>
<br>
* Documentation: <a href="https://help.ubuntu.com/" target="_blank">https://help.ubuntu.com/</a><br>
<br>
System information as of Wed Jun 10 02:52:59 UTC 2015<br>
<br>
System load: 0.29 Processes: 101<br>
Usage of /: 13.4% of 37.51GB Users logged in: 1<br>
Memory usage: 49% IP address for eth0: 10.11.12.2<br>
Swap usage: 0%<br>
<br>
Graph this data and manage this system at:<br>
<a href="https://landscape.canonical.com/" target="_blank">https://landscape.canonical.com/</a><br>
<br>
Get cloud support with Ubuntu Advantage Cloud Guest:<br>
<a href="http://www.ubuntu.com/business/services/cloud" target="_blank">http://www.ubuntu.com/business/services/cloud</a><br>
<br>
0 packages can be updated.<br>
0 updates are security updates.<br>
<br>
Last login: Wed Jun 10 02:52:09 2015 from 192.168.234.226 ubuntu@c1-cdhmaster54-001:~$<br>
<br>
It is quite weird. Have any of you met this before, and give any suggestions? Thanks a lot.<br>
<br>
-Ken<br>
<br>
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</div></div></blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature">Sincerely yours,<br>Sergey Lukjanov<br>Sahara Technical Lead<br>(OpenStack Data Processing)<br>Principal Software Engineer<br>Mirantis Inc.</div>
</div>