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[Chad Smith <1735331@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

Saw an issue once on EC2 zesty image with 17.1.41 during SRU testing.

A traceback when trying to read the temporary pid file that was created
by our dhclient run during Ec2Local setup. Maybe we exited out of the
dhcp run before we could read the pid file?


...
2017-11-30 04:20:32,738 - util.py[DEBUG]: Running command ['ip', 'link', 'set', 'dev', 'eth0', 'up'] with allowed return codes [0] (shell=False, capture=True)
2017-11-30 04:20:32,744 - util.py[DEBUG]: Running command ['/var/tmp/cloud-init/cloud-init-dhcp-hnatdvwi/dhclient', '-1', '-v', '-lf', '/var/tmp/cloud-init/cloud-init-dhcp-hnatdvwi/dhcp.leases', '-pf', '/var/tmp/cloud-init/cloud-init-dhcp-hnatdvwi/dhclient.pid', 'eth0', '-sf', '/bin/true'] with allowed return codes [0] (shell=False, capture=True)
2017-11-30 04:20:32,768 - util.py[DEBUG]: Reading from /var/tmp/cloud-init/cloud-init-dhcp-hnatdvwi/dhclient.pid (quiet=False)
2017-11-30 04:20:32,768 - handlers.py[DEBUG]: finish: init-local/search-Ec2Local: FAIL: no local data found from DataSourceEc2Local
2017-11-30 04:20:32,768 - util.py[WARNING]: Getting data from <class 'cloudinit.sources.DataSourceEc2.DataSourceEc2Local'> failed
2017-11-30 04:20:32,768 - util.py[DEBUG]: Getting data from <class 'cloudinit.sources.DataSourceEc2.DataSourceEc2Local'> failed
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/cloudinit/sources/__init__.py", line 332, in find_source
    if s.get_data():
  File "/usr/lib/python3/dist-packages/cloudinit/sources/DataSourceEc2.py", line 378, in get_data
    return super(DataSourceEc2Local, self).get_data()
  File "/usr/lib/python3/dist-packages/cloudinit/sources/DataSourceEc2.py", line 100, in get_data
    self.fallback_interface)
  File "/usr/lib/python3/dist-packages/cloudinit/net/dhcp.py", line 57, in maybe_perform_dhcp_discovery
    return dhcp_discovery(dhclient_path, nic, tdir)
  File "/usr/lib/python3/dist-packages/cloudinit/net/dhcp.py", line 124, in dhcp_discovery
    pid = int(util.load_file(pid_file).strip())
  File "/usr/lib/python3/dist-packages/cloudinit/util.py", line 1257, in load_file
    with open(fname, 'rb') as ifh:
FileNotFoundError: [Errno 2] No such file or directory: '/var/tmp/cloud-init/cloud-init-dhcp-hnatdvwi/dhclient.pid'

** Affects: cloud-init
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1735331

Title:
  ec2: temp dhclient.pid file issues

Status in cloud-init:
  New

Bug description:
  Saw an issue once on EC2 zesty image with 17.1.41 during SRU testing.

  A traceback when trying to read the temporary pid file that was
  created  by our dhclient run during Ec2Local setup. Maybe we exited
  out of the dhcp run before we could read the pid file?



  ...
  2017-11-30 04:20:32,738 - util.py[DEBUG]: Running command ['ip', 'link', 'set', 'dev', 'eth0', 'up'] with allowed return codes [0] (shell=False, capture=True)
  2017-11-30 04:20:32,744 - util.py[DEBUG]: Running command ['/var/tmp/cloud-init/cloud-init-dhcp-hnatdvwi/dhclient', '-1', '-v', '-lf', '/var/tmp/cloud-init/cloud-init-dhcp-hnatdvwi/dhcp.leases', '-pf', '/var/tmp/cloud-init/cloud-init-dhcp-hnatdvwi/dhclient.pid', 'eth0', '-sf', '/bin/true'] with allowed return codes [0] (shell=False, capture=True)
  2017-11-30 04:20:32,768 - util.py[DEBUG]: Reading from /var/tmp/cloud-init/cloud-init-dhcp-hnatdvwi/dhclient.pid (quiet=False)
  2017-11-30 04:20:32,768 - handlers.py[DEBUG]: finish: init-local/search-Ec2Local: FAIL: no local data found from DataSourceEc2Local
  2017-11-30 04:20:32,768 - util.py[WARNING]: Getting data from <class 'cloudinit.sources.DataSourceEc2.DataSourceEc2Local'> failed
  2017-11-30 04:20:32,768 - util.py[DEBUG]: Getting data from <class 'cloudinit.sources.DataSourceEc2.DataSourceEc2Local'> failed
  Traceback (most recent call last):
    File "/usr/lib/python3/dist-packages/cloudinit/sources/__init__.py", line 332, in find_source
      if s.get_data():
    File "/usr/lib/python3/dist-packages/cloudinit/sources/DataSourceEc2.py", line 378, in get_data
      return super(DataSourceEc2Local, self).get_data()
    File "/usr/lib/python3/dist-packages/cloudinit/sources/DataSourceEc2.py", line 100, in get_data
      self.fallback_interface)
    File "/usr/lib/python3/dist-packages/cloudinit/net/dhcp.py", line 57, in maybe_perform_dhcp_discovery
      return dhcp_discovery(dhclient_path, nic, tdir)
    File "/usr/lib/python3/dist-packages/cloudinit/net/dhcp.py", line 124, in dhcp_discovery
      pid = int(util.load_file(pid_file).strip())
    File "/usr/lib/python3/dist-packages/cloudinit/util.py", line 1257, in load_file
      with open(fname, 'rb') as ifh:
  FileNotFoundError: [Errno 2] No such file or directory: '/var/tmp/cloud-init/cloud-init-dhcp-hnatdvwi/dhclient.pid'

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