Hi Nikita: Thank you for the very prompt response.
I have tried with both the auto-generated Sahara security group as well as a custom security group that explicitly allows all TCP and ICMP traffic on all ports in both directions. Still no success: I get the same SSH banner error. (although as always, using ip netns ... manually will succeed). I am running Sahara 3.0.1-4 on a Red Hat 7 host running RHEL Openstack 8 / Liberty. I believe this version of Sahara is somewhat out of date, but this is what Red Hat and my operations team provide me. This link: http://pastebin.com/Y5qigucq has a list of Python packages installed on my system that Sahara depends on. Again, thank you very much for your help. Best, Jeremy On Wed, Jul 20, 2016 at 11:32 AM, Nikita Konovalov <nkonova...@mirantis.com> wrote: > Hi, Jeremy. > > It looks like there might be a problem in instance to instance > communication. Could you please check that the tcp traffic between instances > is not blocked. Especially on port 22. > > Could you also send witch version of Sahara do you have and what versions of > python dependencies are installed in your system. > > On Wed, Jul 20, 2016 at 6:20 PM, Jeremy Freudberg <jfr...@bu.edu> wrote: >> >> Hi all, I'm having an issue with Sahara accessing its instances. This >> is over private IP, not public/floating. I have use_floating_ips = >> false and use_namespaces = true in sahara.conf. My setup also uses >> Neutron, so use_neutron = true as well. >> >> Here is an excerpt from the logs: >> >> DEBUG sahara.utils.ssh_remote >> [req-ad9e16b1-176b-4283-92ea-e2032928e3a0 ] [instance: >> f2145fd1-fa9e-4d45-9d61-653bb6d6dd6d, cluster: >> 6493dfa9-4875-4844-abd4-d425b3312ee4] Returning neutron info: {'host': >> u'192.168.201.23', 'tenant': u'jfr...@bu.edu', 'network': >> u'433d83c0-1f7f-4fb7-b4a1-995b47344ac4'} get_neutron_info >> /usr/lib/python2.7/site-packages/sahara/utils/ssh_remote.py:581 >> >> DEBUG sahara.service.engine [req-ad9e16b1-176b-4283-92ea-e2032928e3a0 >> ] [instance: f2145fd1-fa9e-4d45-9d61-653bb6d6dd6d, cluster: >> 6493dfa9-4875-4844-abd4-d425b3312ee4] Can't login to node, IP: >> 192.168.201.23, reason SSHException: Error reading SSH protocol banner >> >> We would think this to be a networking issue, right? (Or maybe an SSH >> issue...) However, when I perform the SSH command manually, I can >> connect to my instances: >> >> ip netns exec qdhcp-433d83c0-1f7f-4fb7-b4a1-995b47344ac4 ssh -i >> /path/to/private/key ubuntu@192.168.201.23 >> >> The above command executes successfully and SSH connects. >> >> Any help is greatly appreciated. >> >> Thanks, >> Jeremy Freudberg >> >> _______________________________________________ >> Mailing list: >> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack >> Post to : openstack@lists.openstack.org >> Unsubscribe : >> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack > > > > > -- > Best Regards, > Nikita Konovalov > Mirantis, Inc _______________________________________________ Mailing list: http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack Post to : openstack@lists.openstack.org Unsubscribe : http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack