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[Launchpad Bug Tracker <1735331@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package cloud-init -
17.1-46-g7acc9e68-0ubuntu1

---------------
cloud-init (17.1-46-g7acc9e68-0ubuntu1) bionic; urgency=medium

  * New upstream snapshot.
    - ec2: Fix sandboxed dhclient background process cleanup.
      [Chad Smith] (LP: #1735331)
    - tests: NoCloudKVMImage do not modify the original local cache image.
    - tests: Enable bionic in integration tests. [Joshua Powers]
    - tests: Use apt-get to install a deb so that depends get resolved.
    - sysconfig: Correctly render dns and dns search info.
      [Ryan McCabe] (LP: #1705804)

 -- Scott Moser <smoser@xxxxxxxxxx>  Thu, 30 Nov 2017 21:59:55 -0500

** Changed in: cloud-init (Ubuntu Bionic)
       Status: New => Fix Released

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

Title:
  ec2: zesty tempfile sandbox dhclient.pid file can't be created

Status in cloud-init:
  Fix Committed
Status in cloud-init package in Ubuntu:
  Fix Released
Status in cloud-init source package in Xenial:
  New
Status in cloud-init source package in Zesty:
  New
Status in cloud-init source package in Artful:
  New
Status in cloud-init source package in Bionic:
  Fix Released

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

  Looks like we hit an inability to create the pid file (from syslog)

  
  #### syslog
  Nov 30 04:20:35 ip-10-0-20-176 cloud-init[440]: Cloud-init v. 17.1 running 'init-local' at Thu, 30 Nov 2017 04:20:32 +0000. Up 7.16 seconds.
  Nov 30 04:20:35 ip-10-0-20-176 cloud-init[440]: 2017-11-30 04:20:32,768 - util.py[WARNING]: Getting data from <class 'cloudinit.sources.DataSourceEc2.DataSourceEc2Local'> failed
  Nov 30 04:20:35 ip-10-0-20-176 dhclient[669]: Can't create /var/tmp/cloud-init/cloud-init-dhcp-hnatdvwi/dhclient.pid: No such file or directory


  #### end syslog


  
  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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