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[Slawek Kaplonski <1836642@xxxxxxxxxxxxxxxxxx>]

** No longer affects: neutron

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https://bugs.launchpad.net/bugs/1836642

Title:
  Metadata responses are very slow sometimes

Status in OpenStack Compute (nova):
  Expired

Bug description:
  It happens from time to time in CI that VM spawned in test don't get
  public-keys from metadata service. Due to that SSH to instance using
  ssh-key is not possible thus test fails.

  Example of such failures:

  http://logs.openstack.org/09/666409/7/check/tempest-full/08f4c53/testr_results.html.gz
  http://logs.openstack.org/35/521035/8/check/tempest-full/031b0b9/testr_results.html.gz
  http://logs.openstack.org/45/645645/8/gate/tempest-full/4d7874e/testr_results.html.gz

  In each of those cases it looks that neutron metadata agent was
  waiting more than 10 seconds for response from n-api-meta service:

  http://logs.openstack.org/09/666409/7/check/tempest-
  full/08f4c53/controller/logs/screen-n-api-
  meta.txt.gz#_Jul_11_23_43_16_704979 ~ 16 seconds,

  http://logs.openstack.org/35/521035/8/check/tempest-
  full/031b0b9/controller/logs/screen-n-api-
  meta.txt.gz#_Jul_09_17_23_47_871054 ~ 13 seconds,

  http://logs.openstack.org/45/645645/8/gate/tempest-
  full/4d7874e/controller/logs/screen-n-api-
  meta.txt.gz#_Jul_09_01_43_56_549916 ~ 17 seconds.

  I have no idea why nova is responding so slow but it would be worth if
  someone from Nova team would take a look into that.

  Logstash query which can help to find another examples:
  http://logstash.openstack.org/#dashboard/file/logstash.json?query=message%3A%5C%22failed%20to%20get%20http%3A%2F%2F169.254.169.254%2F2009-04-04%2Fmeta-
  data%2Fpublic-keys%5C%22

  It is possible that in some cases of failed tests, reason of failure
  may be different but problem described above is quite common in those
  failed tests IMO.

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