Comment 2 for bug 1721730

-ebf95baf5ca3'}
        Body:
2017-10-09 12:54:32,945 12405 INFO [tempest.lib.common.ssh] Creating ssh connection to '172.24.4.12:22' as 'root' with public key authentication
2017-10-09 12:54:36,257 12405 WARNING [tempest.lib.common.ssh] Failed to establish authenticated ssh connection to root@172.24.4.12 ([Errno None] Unable to connect to port 22 on 172.24.4.12). Number attempts: 1. Retry after 2 seconds.
2017-10-09 12:54:41,757 12405 WARNING [tempest.lib.common.ssh] Failed to establish authenticated ssh connection to root@172.24.4.12 ([Errno None] Unable to connect to port 22 on 172.24.4.12). Number attempts: 2. Retry after 3 seconds.
2017-10-09 12:54:48,257 12405 WARNING [tempest.lib.common.ssh] Failed to establish authenticated ssh connection to root@172.24.4.12 ([Errno None] Unable to connect to port 22 on 172.24.4.12). Number attempts: 3. Retry after 4 seconds.
2017-10-09 12:54:55,757 12405 WARNING [tempest.lib.common.ssh] Failed to establish authenticated ssh connection to root@172.24.4.12 ([Errno None] Unable to connect to port 22 on 172.24.4.12). Number attempts: 4. Retry after 5 seconds.
2017-10-09 12:55:04,257 12405 WARNING [tempest.lib.common.ssh] Failed to establish authenticated ssh connection to root@172.24.4.12 ([Errno None] Unable to connect to port 22 on 172.24.4.12). Number attempts: 5. Retry after 6 seconds.
2017-10-09 12:55:13,757 12405 WARNING [tempest.lib.common.ssh] Failed to establish authenticated ssh connection to root@172.24.4.12 ([Errno None] Unable to connect to port 22 on 172.24.4.12). Number attempts: 6. Retry after 7 seconds.
2017-10-09 12:55:24,257 12405 WARNING [tempest.lib.common.ssh] Failed to establish authenticated ssh connection to root@172.24.4.12 ([Errno None] Unable to connect to port 22 on 172.24.4.12). Number attempts: 7. Retry after 8 seconds.
2017-10-09 12:55:35,757 12405 WARNING [tempest.lib.common.ssh] Failed to establish authenticated ssh connection to root@172.24.4.12 ([Errno None] Unable to connect to port 22 on 172.24.4.12). Number attempts: 8. Retry after 9 seconds.
2017-10-09 12:55:48,267 12405 WARNING [tempest.lib.common.ssh] Failed to establish authenticated ssh connection to root@172.24.4.12 ([Errno None] Unable to connect to port 22 on 172.24.4.12). Number attempts: 9. Retry after 10 seconds.
2017-10-09 12:56:01,787 12405 WARNING [tempest.lib.common.ssh] Failed to establish authenticated ssh connection to root@172.24.4.12 ([Errno None] Unable to connect to port 22 on 172.24.4.12). Number attempts: 10. Retry after 11 seconds.
2017-10-09 12:56:16,297 12405 WARNING [tempest.lib.common.ssh] Failed to establish authenticated ssh connection to root@172.24.4.12 ([Errno None] Unable to connect to port 22 on 172.24.4.12). Number attempts: 11. Retry after 12 seconds.
2017-10-09 12:56:31,807 12405 WARNING [tempest.lib.common.ssh] Failed to establish authenticated ssh connection to root@172.24.4.12 ([Errno None] Unable to connect to port 22 on 172.24.4.12). Number attempts: 12. Retry after 13 seconds.
2017-10-09 12:56:48,317 12405 WARNING [tempest.lib.common.ssh] Failed to establish authenticated ssh connection to root@172.24.4.12 ([Errno None] Unable to connect to port 22 on 172.24.4.12). Number attempts: 13. Retry after 14 seconds.
2017-10-09 12:57:05,827 12405 WARNING [tempest.lib.common.ssh] Failed to establish authenticated ssh connection to root@172.24.4.12 ([Errno None] Unable to connect to port 22 on 172.24.4.12). Number attempts: 14. Retry after 15 seconds.
2017-10-09 12:57:24,327 12405 WARNING [tempest.lib.common.ssh] Failed to establish authenticated ssh connection to root@172.24.4.12 ([Errno None] Unable to connect to port 22 on 172.24.4.12). Number attempts: 15. Retry after 16 seconds.
2017-10-09 12:57:43,827 12405 WARNING [tempest.lib.common.ssh] Failed to establish authenticated ssh connection to root@172.24.4.12 ([Errno None] Unable to connect to port 22 on 172.24.4.12). Number attempts: 16. Retry after 17 seconds.
2017-10-09 12:58:04,327 12405 ERROR [tempest.lib.common.ssh] Failed to establish authenticated ssh connection to root@172.24.4.12 after 16 attempts
2017-10-09 12:58:04.327 12405 ERROR tempest.lib.common.ssh Traceback (most recent call last):
2017-10-09 12:58:04.327 12405 ERROR tempest.lib.common.ssh File "/opt/stack/tempest/tempest/lib/common/ssh.py", line 107, in _get_ssh_connection
2017-10-09 12:58:04.327 12405 ERROR tempest.lib.common.ssh sock=proxy_chan)
2017-10-09 12:58:04.327 12405 ERROR tempest.lib.common.ssh File "/usr/local/lib/python2.7/dist-packages/paramiko/client.py", line 329, in connect
2017-10-09 12:58:04.327 12405 ERROR tempest.lib.common.ssh raise NoValidConnectionsError(errors)
2017-10-09 12:58:04.327 12405 ERROR tempest.lib.common.ssh NoValidConnectionsError: [Errno None] Unable to connect to port 22 on 172.24.4.12
2017-10-09 12:58:04.327 12405 ERROR tempest.lib.common.ssh
2017-10-09 12:58:06,216 12405 INFO [tempest.lib.common.rest_client] Request (TestVolumeBootPattern:_run_cleanups): 202 DELETE http://9.152.151.140/compute/v2.1/os-floating-ips/25edb853-c1cd-4bf0-94c3-d158af990538 1.850s
2017-10-09 12:58:06,217 12405 DEBUG [tempest.lib.common.rest_client] Request - Headers: {'Content-Type': 'application/json', 'Accept': 'application/json', 'X-Auth-Token': '<omitted>'}