TestVolumeBootPatternV2.test_volume_boot_pattern: No route to host

[Joshua Harlow]

Seeing a new failure mode that might have not been seen before.

Seems related to ssh timeouts?

Full logs @ http://logs.openstack.org/09/95309/4/check/check-grenade-dsvm/8979d7c/console.html

tempest.scenario.test_volume_boot_pattern.TestVolumeBootPatternV2.test_volume_boot_pattern [221.694108s] ... FAILED

Captured traceback:
~~~~~~~~~~~~~~~~~~~
    Traceback (most recent call last):
      File "tempest/test.py", line 126, in wrapper
        return f(self, *func_args, **func_kwargs)
      File "tempest/scenario/test_volume_boot_pattern.py", line 148, in test_volume_boot_pattern
        text = self._write_text(ssh_client_for_instance_1st)
      File "tempest/scenario/test_volume_boot_pattern.py", line 123, in _write_text
        ssh_client.exec_command('echo "%s" > /tmp/text; sync' % (text))
      File "tempest/common/utils/linux/remote_client.py", line 47, in exec_command
        return self.ssh_client.exec_command(cmd)
      File "tempest/common/ssh.py", line 110, in exec_command
        ssh = self._get_ssh_connection()
      File "tempest/common/ssh.py", line 87, in _get_ssh_connection
        password=self.password)
    SSHTimeout: Connection to the 172.24.4.2 via SSH timed out.
    User: cirros, Password: None