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 <[email protected]> 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:[email protected]] > Sent: Wednesday, June 10, 2015 10:57 AM > To: [email protected] > 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@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 > 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@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@c1-cdhmaster54-001:~$ > > It is quite weird. Have any of you met this before, and give any > suggestions? Thanks a lot. > > -Ken > > _______________________________________________ > Mailing list: > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack > Post to : [email protected] > Unsubscribe : > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack > > _______________________________________________ > Mailing list: > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack > Post to : [email protected] > Unsubscribe : > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack > -- Sincerely yours, Sergey Lukjanov Sahara Technical Lead (OpenStack Data Processing) Principal Software Engineer Mirantis Inc.
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