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[Andres Rodriguez <andreserl@xxxxxxxxxxxxx>]

** Changed in: maas
       Status: Incomplete => Invalid

** Changed in: maas
    Milestone: 2.3.0 => None

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https://bugs.launchpad.net/bugs/1686485

Title:
  cc_ntp fails to work when deploying ubuntu-core

Status in cloud-init:
  Fix Committed
Status in MAAS:
  Invalid

Bug description:
  When deploying Ubuntu Core with MAAS I am seeing this error in
  /var/log/cloud-init.log:

  2017-04-26 18:11:45,172 - cc_apt_configure.py[DEBUG]: Nothing to do: No apt config and running on snappy
  2017-04-26 18:11:45,172 - handlers.py[DEBUG]: finish: modules-config/config-apt-configure: SUCCESS: config-apt-configure ran successfully
  2017-04-26 18:11:45,172 - stages.py[DEBUG]: Running module ntp (<module 'cloudinit.config.cc_ntp' from '/usr/lib/python3/dist-packages/cloudinit/config/cc_ntp.py'>) with frequency once-per-instance
  2017-04-26 18:11:45,172 - handlers.py[DEBUG]: start: modules-config/config-ntp: running config-ntp with frequency once-per-instance
  2017-04-26 18:11:45,173 - util.py[DEBUG]: Writing to /var/lib/cloud/instances/mpcgqp/sem/config_ntp - wb: [420] 24 bytes
  2017-04-26 18:11:45,173 - helpers.py[DEBUG]: Running config-ntp using lock (<FileLock using file '/var/lib/cloud/instances/mpcgqp/sem/config_ntp'>)
  2017-04-26 18:11:45,175 - util.py[DEBUG]: Writing to /var/lib/cloud/instances/mpcgqp/sem/update_sources - wb: [420] 24 bytes
  2017-04-26 18:11:45,176 - helpers.py[DEBUG]: Running update-sources using lock (<FileLock using file '/var/lib/cloud/instances/mpcgqp/sem/update_sources'>)
  2017-04-26 18:11:45,176 - util.py[DEBUG]: Running command ['apt-get', '--option=Dpkg::Options::=--force-confold', '--option=Dpkg::options::=--force-unsafe-io', '--assume-yes', '--quiet', 'update'] with allowed return codes [0] (shell=False, capture=False)
  2017-04-26 18:11:45,186 - util.py[DEBUG]: apt-update [apt-get --option=Dpkg::Options::=--force-confold --option=Dpkg::options::=--force-unsafe-io --assume-yes --quiet update] took 0.010 seconds
  2017-04-26 18:11:45,186 - util.py[DEBUG]: Running command ['apt-get', '--option=Dpkg::Options::=--force-confold', '--option=Dpkg::options::=--force-unsafe-io', '--assume-yes', '--quiet', 'install', 'ntp'] with allowed return codes [0] (shell=False, capture=False)
  2017-04-26 18:11:45,191 - util.py[DEBUG]: apt-install [apt-get --option=Dpkg::Options::=--force-confold --option=Dpkg::options::=--force-unsafe-io --assume-yes --quiet install ntp] took 0.005 seconds
  2017-04-26 18:11:45,193 - util.py[DEBUG]: Reading from /etc/cloud/templates/ntp.conf.ubuntu.tmpl (quiet=False)
  2017-04-26 18:11:45,193 - util.py[DEBUG]: Read 2509 bytes from /etc/cloud/templates/ntp.conf.ubuntu.tmpl
  2017-04-26 18:11:45,193 - templater.py[DEBUG]: Rendering content of '/etc/cloud/templates/ntp.conf.ubuntu.tmpl' using renderer jinja
  2017-04-26 18:11:45,197 - util.py[DEBUG]: Writing to /etc/ntp.conf - wb: [420] 2330 bytes
  2017-04-26 18:11:45,200 - handlers.py[DEBUG]: finish: modules-config/config-ntp: FAIL: running config-ntp with frequency once-per-instance
  2017-04-26 18:11:45,200 - util.py[WARNING]: Running module ntp (<module 'cloudinit.config.cc_ntp' from '/usr/lib/python3/dist-packages/cloudinit/config/cc_ntp.py'>) failed
  2017-04-26 18:11:45,202 - util.py[DEBUG]: Running module ntp (<module 'cloudinit.config.cc_ntp' from '/usr/lib/python3/dist-packages/cloudinit/config/cc_ntp.py'>) failed
  Traceback (most recent call last):
    File "/usr/lib/python3/dist-packages/cloudinit/stages.py", line 787, in _run_modules
      freq=freq)
    File "/usr/lib/python3/dist-packages/cloudinit/cloud.py", line 54, in run
      return self._runners.run(name, functor, args, freq, clear_on_fail)
    File "/usr/lib/python3/dist-packages/cloudinit/helpers.py", line 187, in run
      results = functor(*args)
    File "/usr/lib/python3/dist-packages/cloudinit/config/cc_ntp.py", line 80, in handle
      write_ntp_config_template(ntp_cfg, cloud)
    File "/usr/lib/python3/dist-packages/cloudinit/config/cc_ntp.py", line 126, in write_ntp_config_template
      templater.render_to_file(template_fn, NTP_CONF, params)
    File "/usr/lib/python3/dist-packages/cloudinit/templater.py", line 131, in render_to_file
      util.write_file(outfn, contents, mode=mode)
    File "/usr/lib/python3/dist-packages/cloudinit/util.py", line 1711, in write_file
      with open(filename, omode) as fh:
  OSError: [Errno 30] Read-only file system: '/etc/ntp.conf'

  Note: This doesn't break deployment. Deployment still succeeds, except
  for ntp syncing is not setup to point to MAAS.

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