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[Bug 1906187] Re: Version tag is not respected when put last

 

** Also affects: netplan
   Importance: Undecided
       Status: New

** Also affects: cloud-init
   Importance: Undecided
       Status: New

** No longer affects: netplan

** Changed in: cloud-init
       Status: New => Triaged

** Changed in: cloud-init
   Importance: Undecided => High

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https://bugs.launchpad.net/bugs/1906187

Title:
  Version tag is not respected when put last

Status in cloud-init:
  Triaged
Status in cloud-init package in Ubuntu:
  Triaged
Status in netplan.io package in Ubuntu:
  Confirmed

Bug description:
  I've created a 'network-config' file with Terraform's yamldecode() function that contains (btw. I've tried with the version being a Number w/o quotes and as well as a String as shown here):
  ---
  "network":
    "ethernets":
      "eth0":
        "gateway4": "192.168.1.1"
        "nameservers":
          "addresses":
          - "192.168.1.74"
          - "192.168.1.104"
          "search":
          - "fritz.box"
        "set-name": "eth0"
    "version": "2"
  ---
  After running on Raspberry Pi 4B with 4 GB, created with ubuntu-20.04.1-preinstalled-server-arm64+raspi.img.xz, the machine's setup fails and /var/log/cloud-init.log reveals that:
  ---
  2020-04-01 17:23:48,649 - util.py[DEBUG]: Reading from /boot/firmware//network-config (quiet=False)
  2020-04-01 17:23:48,649 - util.py[DEBUG]: Read 245 bytes from /boot/firmware//network-config
  2020-04-01 17:23:48,650 - util.py[DEBUG]: Attempting to load yaml from string of length 240 with allowed root types (<class 'dict'>,)
  2020-04-01 17:23:48,652 - util.py[DEBUG]: Attempting to load yaml from string of length 245 with allowed root types (<class 'dict'>,)
  2020-04-01 17:23:48,656 - DataSourceNoCloud.py[DEBUG]: Top level network key in network-config but missing 'config' or 'version': {'network': {'ethernets': {'eth0': {'gateway4': '192.168.1.1', 'nameservers': {'addresses': ['192.168.1.74', '192.168.1.104'], 'search': ['fritz.box']}, 'set-name': 'eth0'}}, 'version': '2'}}
  ---
  The corresponding /var/log/clout-init-output.log reveals the trace and that Network won't come up.
  ---
  Cloud-init v. 20.2-45-g5f7825e2-0ubuntu1~20.04.1 running 'init-local' at Wed, 01 Apr 2020 17:23:48 +0000. Up 21.71 seconds.
  2020-04-01 17:23:48,796 - util.py[WARNING]: failed stage init-local
  failed run of stage init-local
  ------------------------------------------------------------
  Traceback (most recent call last):
    File "/usr/lib/python3/dist-packages/cloudinit/cmd/main.py", line 653, in status_wrapper
      ret = functor(name, args)
    File "/usr/lib/python3/dist-packages/cloudinit/cmd/main.py", line 362, in main_init
      init.apply_network_config(bring_up=bool(mode != sources.DSMODE_LOCAL))
    File "/usr/lib/python3/dist-packages/cloudinit/stages.py", line 699, in apply_network_config
      net.wait_for_physdevs(netcfg)
    File "/usr/lib/python3/dist-packages/cloudinit/net/__init__.py", line 523, in wait_for_physdevs
      physdevs = extract_physdevs(netcfg)
    File "/usr/lib/python3/dist-packages/cloudinit/net/__init__.py", line 519, in extract_physdevs
      raise RuntimeError('Unknown network config version: %s' % version)
  RuntimeError: Unknown network config version: None
  ------------------------------------------------------------
  Cloud-init v. 20.2-45-g5f7825e2-0ubuntu1~20.04.1 running 'init' at Wed, 01 Apr 2020 17:23:50 +0000. Up 23.69 seconds.
  ci-info: +++++++++++++++++++++++++++Net device info++++++++++++++++++++++++++++
  ci-info: +--------+-------+-----------+-----------+-------+-------------------+
  ci-info: | Device |   Up  |  Address  |    Mask   | Scope |     Hw-Address    |
  ci-info: +--------+-------+-----------+-----------+-------+-------------------+
  ci-info: |  eth0  | False |     .     |     .     |   .   | dc:a6:32:b1:78:8e |
  ci-info: |   lo   |  True | 127.0.0.1 | 255.0.0.0 |  host |         .         |
  ci-info: |   lo   |  True |  ::1/128  |     .     |  host |         .         |
  ci-info: | wlan0  | False |     .     |     .     |   .   | dc:a6:32:b1:78:8f |
  ci-info: +--------+-------+-----------+-----------+-------+-------------------+
  ci-info: +++++++++++++++++++Route IPv6 info+++++++++++++++++++
  ci-info: +-------+-------------+---------+-----------+-------+
  ci-info: | Route | Destination | Gateway | Interface | Flags |
  ci-info: +-------+-------------+---------+-----------+-------+
  ci-info: +-------+-------------+---------+-----------+-------+
  2020-04-01 17:23:50,653 - stages.py[WARNING]: Failed to rename devices: Failed to apply network config names: Unknown network config version: None

  
  Related bugs:
   * bug 1798117: juju sends "network" top level key to user.network-config in lxd containers

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