cmd: cloud-init query fails for juju units with UnicodeDecodeError

Bug #1889938 reported by Chad Smith
This bug affects 1 person
Affects Status Importance Assigned to Milestone
Fix Released
Chad Smith

Bug Description

sudo cloud-init query --all fails on juju deployed units with the following trace:
Traceback (most recent call last):
  File "/usr/bin/cloud-init", line 11, in <module>
    load_entry_point('cloud-init==20.2', 'console_scripts', 'cloud-init')()
  File "/usr/lib/python3/dist-packages/cloudinit/cmd/", line 893, in main
    get_uptime=True, func=functor, args=(name, args))
  File "/usr/lib/python3/dist-packages/cloudinit/", line 2620, in log_time
    ret = func(*args, **kwargs)
  File "/usr/lib/python3/dist-packages/cloudinit/cmd/", line 123, in handle_args
    instance_data['userdata'] = util.load_file(user_data_fn)
  File "/usr/lib/python3/dist-packages/cloudinit/", line 1432, in load_file
    return decode_binary(contents)
  File "/usr/lib/python3/dist-packages/cloudinit/", line 132, in decode_binary
    return blob.decode(encoding)
UnicodeDecodeError: 'utf-8' codec can't decode byte 0x8b in position 1: invalid start byte

On some platforms (juju deployed instances and various openstack platforms), user-data is compressed when provided to the instance.

When deploying juju units in ec2 regions, user-data provided to the instance is gzip compressed.

The cloud-init query command attempts to load, decode and read raw userdata content from /var/lib/cloud/instance/user-data.txt. In cases where the user-data is gzip compressed, decoding fails.

Chad Smith (chad.smith)
Changed in cloud-init:
status: New → Triaged
importance: Undecided → Medium
Chad Smith (chad.smith)
description: updated
Revision history for this message
Chad Smith (chad.smith) wrote :
Changed in cloud-init:
status: Triaged → Fix Committed
assignee: nobody → Chad Smith (chad.smith)
Revision history for this message
James Falcon (falcojr) wrote : Fixed in cloud-init version 20.3.

This bug is believed to be fixed in cloud-init in version 20.3. 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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