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[Vasyl Saienko <vsaienko@xxxxxxxxxxxx>]

Public bug reported:

The metadata server returns 404 when using the same port for new instance in
less than cache_timeout.

Steps to reproduce:
1. Enable metadata caching
2. Run test neutron_tempest_plugin.scenario.test_ports.PortsTest.test_previously_used_port
3. The test will fail with 

Traceback (most recent call last):

  File "/var/lib/openstack/lib/python3.6/site-
packages/tempest/lib/common/ssh.py", line 107, in _get_ssh_connection

    sock=proxy_chan)

  File "/var/lib/openstack/lib/python3.6/site-
packages/paramiko/client.py", line 446, in connect

    passphrase,

  File "/var/lib/openstack/lib/python3.6/site-
packages/paramiko/client.py", line 764, in _auth

    raise saved_exception

  File "/var/lib/openstack/lib/python3.6/site-
packages/paramiko/client.py", line 664, in _auth

    self._transport.auth_publickey(username, pkey)

  File "/var/lib/openstack/lib/python3.6/site-
packages/paramiko/transport.py", line 1580, in auth_publickey

    return self.auth_handler.wait_for_response(my_event)

  File "/var/lib/openstack/lib/python3.6/site-
packages/paramiko/auth_handler.py", line 250, in wait_for_response

    raise e

paramiko.ssh_exception.AuthenticationException: Authentication failed.


During handling of the above exception, another exception occurred:


Traceback (most recent call last):

  File "/var/lib/openstack/lib/python3.6/site-
packages/neutron_tempest_plugin/scenario/test_ports.py", line 74, in
test_previously_used_port

    self.keypair['private_key'])

  File "/var/lib/openstack/lib/python3.6/site-
packages/neutron_tempest_plugin/scenario/base.py", line 217, in
check_connectivity

    ssh_client.test_connection_auth()

  File "/var/lib/openstack/lib/python3.6/site-
packages/neutron_tempest_plugin/common/ssh.py", line 153, in connect

    *args, **kwargs)

  File "/var/lib/openstack/lib/python3.6/site-
packages/tempest/lib/common/ssh.py", line 121, in _get_ssh_connection

    password=self.password)

tempest.lib.exceptions.SSHTimeout: Connection to the 10.11.12.196 via
SSH timed out.

User: cirros, Password: None

** Affects: nova
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1868867

Title:
  No responce from metadata server when reusing port

Status in OpenStack Compute (nova):
  New

Bug description:
  The metadata server returns 404 when using the same port for new instance in
  less than cache_timeout.

  Steps to reproduce:
  1. Enable metadata caching
  2. Run test neutron_tempest_plugin.scenario.test_ports.PortsTest.test_previously_used_port
  3. The test will fail with 

  Traceback (most recent call last):

    File "/var/lib/openstack/lib/python3.6/site-
  packages/tempest/lib/common/ssh.py", line 107, in _get_ssh_connection

      sock=proxy_chan)

    File "/var/lib/openstack/lib/python3.6/site-
  packages/paramiko/client.py", line 446, in connect

      passphrase,

    File "/var/lib/openstack/lib/python3.6/site-
  packages/paramiko/client.py", line 764, in _auth

      raise saved_exception

    File "/var/lib/openstack/lib/python3.6/site-
  packages/paramiko/client.py", line 664, in _auth

      self._transport.auth_publickey(username, pkey)

    File "/var/lib/openstack/lib/python3.6/site-
  packages/paramiko/transport.py", line 1580, in auth_publickey

      return self.auth_handler.wait_for_response(my_event)

    File "/var/lib/openstack/lib/python3.6/site-
  packages/paramiko/auth_handler.py", line 250, in wait_for_response

      raise e

  paramiko.ssh_exception.AuthenticationException: Authentication failed.


  During handling of the above exception, another exception occurred:


  Traceback (most recent call last):

    File "/var/lib/openstack/lib/python3.6/site-
  packages/neutron_tempest_plugin/scenario/test_ports.py", line 74, in
  test_previously_used_port

      self.keypair['private_key'])

    File "/var/lib/openstack/lib/python3.6/site-
  packages/neutron_tempest_plugin/scenario/base.py", line 217, in
  check_connectivity

      ssh_client.test_connection_auth()

    File "/var/lib/openstack/lib/python3.6/site-
  packages/neutron_tempest_plugin/common/ssh.py", line 153, in connect

      *args, **kwargs)

    File "/var/lib/openstack/lib/python3.6/site-
  packages/tempest/lib/common/ssh.py", line 121, in _get_ssh_connection

      password=self.password)

  tempest.lib.exceptions.SSHTimeout: Connection to the 10.11.12.196 via
  SSH timed out.

  User: cirros, Password: None

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