AttributeError: module 'collections' has no attribute 'Iterable'

[Viktor Ashirov]

Description of problem:
cloud-init crashes with AttributeError: module 'collections' has no attribute 'Iterable'

Version-Release number of selected component (if applicable):
cloud-init-20.4-5.fc35.noarch.rpm

How reproducible:
always

Steps to Reproduce:
1. /usr/bin/cloud-init init

Actual results:
><fs> cat /var/log/cloud-init-output.log
failed run of stage init-local
------------------------------------------------------------
Traceback (most recent call last):
  File "/usr/lib/python3.10/site-packages/cloudinit/cmd/main.py", line 653, in status_wrapper
    ret = functor(name, args)
  File "/usr/lib/python3.10/site-packages/cloudinit/cmd/main.py", line 261, in main_init
    logging.setupLogging(init.cfg)
  File "/usr/lib/python3.10/site-packages/cloudinit/log.py", line 81, in setupLogging
    elif isinstance(a_cfg, (collections.Iterable)):
AttributeError: module 'collections' has no attribute 'Iterable'
------------------------------------------------------------
failed run of stage init
------------------------------------------------------------
Traceback (most recent call last):
  File "/usr/lib/python3.10/site-packages/cloudinit/cmd/main.py", line 653, in status_wrapper
    ret = functor(name, args)
  File "/usr/lib/python3.10/site-packages/cloudinit/cmd/main.py", line 261, in main_init
    logging.setupLogging(init.cfg)
  File "/usr/lib/python3.10/site-packages/cloudinit/log.py", line 81, in setupLogging
    elif isinstance(a_cfg, (collections.Iterable)):
AttributeError: module 'collections' has no attribute 'Iterable'
------------------------------------------------------------
failed run of stage modules-config
------------------------------------------------------------
Traceback (most recent call last):
  File "/usr/lib/python3.10/site-packages/cloudinit/cmd/main.py", line 653, in status_wrapper
    ret = functor(name, args)
  File "/usr/lib/python3.10/site-packages/cloudinit/cmd/main.py", line 509, in main_modules
    logging.setupLogging(mods.cfg)
  File "/usr/lib/python3.10/site-packages/cloudinit/log.py", line 81, in setupLogging
    elif isinstance(a_cfg, (collections.Iterable)):
AttributeError: module 'collections' has no attribute 'Iterable'
------------------------------------------------------------
failed run of stage modules-final
------------------------------------------------------------
Traceback (most recent call last):
  File "/usr/lib/python3.10/site-packages/cloudinit/cmd/main.py", line 653, in status_wrapper
    ret = functor(name, args)
  File "/usr/lib/python3.10/site-packages/cloudinit/cmd/main.py", line 509, in main_modules
    logging.setupLogging(mods.cfg)
  File "/usr/lib/python3.10/site-packages/cloudinit/log.py", line 81, in setupLogging
    elif isinstance(a_cfg, (collections.Iterable)):
AttributeError: module 'collections' has no attribute 'Iterable'
------------------------------------------------------------

Expected results:
cloud-init doesn't crash

Additional info:
https://bugzilla.redhat.com/show_bug.cgi?id=1972283

[James Falcon (falcojr)]

Thanks for the bug report. I put a PR up at https://github.com/canonical/cloud-init/pull/922/files .

I didn't include the try/except because this has been supported/deprecated since 3.3, and cloud-init supports back to 3.5

[Viktor Ashirov (vashirov)]

Awesome, thank you for the quick fix!

[James Falcon (falcojr)]

This bug is believed to be fixed in cloud-init in version 21.3. If this is still a problem for you, please make a comment and set the state back to New

Thank you.

[James Falcon (falcojr)]

Tracked in Github Issues as https://github.com/canonical/cloud-init/issues/3884