group.of.nepali.translators team mailing list archive

[Scott Moser <smoser@xxxxxxxxxx>]

This bug is believed to be fixed in cloud-init in 17.1. If this is still
a problem for you, please make a comment and set the state back to New

Thank you.

** Changed in: cloud-init
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1657130

Title:
  get_data in DataSourceOpenStack.py can time out if metadata service is
  slow

Status in cloud-init:
  Fix Released
Status in cloud-init package in Ubuntu:
  Fix Released
Status in cloud-init source package in Xenial:
  Fix Released
Status in cloud-init source package in Yakkety:
  Fix Released

Bug description:
  === Begin SRU Template ===
  [Impact]
  On heavily loaded openstack metadata services, cloud-init may hit a timeout
  and not properly retry when waiting longer or retring would allow it to 
  succeed.

  cloud-init contained a setting to configure this but it was not used in all
  cases. The change here enabled usage of timeout and retry for.

  [Test Case]
  1. Launch an instance on openstack.
  2. Verify inconsistent use of 'timeout' in /var/log/cloud-init.log
    $ grep http://169.254.169.254/openstack /var/log/cloud-init.log  | grep 0/ | head -n 2
    2017-03-03 16:51:23,824 - url_helper.py[DEBUG]: [0/1] open 'http://169.254.169.254/openstack' with {'url': 'http://169.254.169.254/openstack', 'allow_redirects': True, 'headers': {'User-Agent': 'Cloud-Init/0.7.9'}, 'method': 'GET', 'timeout': 10.0} configuration
    2017-03-03 16:51:24,384 - url_helper.py[DEBUG]: [0/6] open 'http://169.254.169.254/openstack' with {'url': 'http://169.254.169.254/openstack', 'allow_redirects': True, 'headers': {'User-Agent': 'Cloud-Init/0.7.9'}, 'method': 'GET', 'timeout': 5.0} configuration

  3. enable proposed, update, upgrade
  4. clean
     rm -Rf /var/lib/cloud /var/log/cloud-init*
  5. reboot
  6. re-check step 2, expect see 'timeout' is consistent.

  [Regression Potential]
  low chance for regression.  Slower boot times but more reliable on a non-perform
  ant metadata service.

  === End SRU Template ===

  cloud-init sometimes times out and fails to fetch metadata in the
  OpenStack environment when the Controller node is under high workload.

  The default timeout value is 5 seconds and it may be too small in some
  cases where the Controller node is too busy to respond to the metadata
  request  from the instance in time.

  There is a 'timeout' configuration setting, as in...

    datasource:
      OpenStack:
        timeout: 30

  ...but this value is not used by the get_data method in
  cloudinit/sources/DataSourceOpenStack.py, because get_data is called
  from cloudinit/sources/__init__.py with no keyword arguments:

                  LOG.debug("Seeing if we can get any data from %s", cls)
                  s = cls(sys_cfg, distro, paths)
                  if s.get_data():
                      myrep.message = "found %s data from %s" % (mode, name)
                      return (s, type_utils.obj_name(cls))

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