setting manual_cache_clean causes warning

[ubuntu-server-builder]

This bug was originally filed in Launchpad as LP: #1742479

Launchpad details

affected_projects = ['cloud-init (Ubuntu)']
assignee = None
assignee_name = None
date_closed = 2018-02-22T22:33:32.949892+00:00
date_created = 2018-01-10T16:05:13.654367+00:00
date_fix_committed = 2018-02-22T22:33:32.949892+00:00
date_fix_released = 2018-02-22T22:33:32.949892+00:00
id = 1742479
importance = undecided
is_complete = True
lp_url = https://bugs.launchpad.net/cloud-init/+bug/1742479
milestone = None
owner = smoser
owner_name = Scott Moser
private = False
status = fix_released
submitter = smoser
submitter_name = Scott Moser
tags = ['amd64', 'apport-bug', 'bionic', 'uec-images']
duplicates = []

Launchpad user Scott Moser(smoser) wrote on 2018-01-10T16:05:13.654367+00:00

If manual_cache_clean is set in an instance, then ds-identify will write
'# manual_cache_clean."'
to its config (/run/cloud-init/cloud.cfg).

cloud-init will try to load that file, and will WARN on it not being a dict.

2018-01-10 15:45:57,282 - util.py[WARNING]: Failed loading yaml blob
2018-01-10 15:45:57,283 - util.py[DEBUG]: Failed loading yaml blob
Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/cloudinit/util.py", line 898, in load_yaml
(allowed, type_utils.obj_name(converted)))
TypeError: Yaml load allows (<class 'dict'>,) root types, but got NoneType instead

python3 -c 'import yaml; yaml.load("# manual_cache_clean.\n")'
echo "manual_cache_clean: true" > /etc/cloud/cloud.cfg.d/manual.cfg
If you set manual_cache_clean in an instance, then

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: cloud-init 17.2-1-g4089e20c-0ubuntu1
ProcVersionSignature: Ubuntu 4.13.0-17.20-generic 4.13.8
Uname: Linux 4.13.0-17-generic x86_64
ApportVersion: 2.20.8-0ubuntu5
Architecture: amd64
CloudName: NoCloud
Date: Wed Jan 10 15:46:20 2018
PackageArchitecture: all
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
LANG=C.UTF-8
SourcePackage: cloud-init
UpgradeStatus: No upgrade log present (probably fresh install)
user_data.txt:
#cloud-config
{}

[ubuntu-server-builder]

Launchpad user Scott Moser(smoser) wrote on 2018-01-10T16:05:13.654367+00:00

Launchpad attachments: NonfreeKernelModules.txt,Dependencies.txt,JournalErrors.txt,ProcCpuinfoMinimal.txt,cloud-init-log-warnings.txt,cloud-init-output.log.txt.txt,logs.tgz.gz,lshw.txt.txt

[ubuntu-server-builder]

Launchpad user Chad Smith(chad.smith) wrote on 2018-01-10T17:40:14.409253+00:00

This is done in ./src/maasserver/compose_preseed.py

    # Prevent the node from requesting cloud-init data on every reboot.
    # This is done so a machine does not need to contact MAAS every time
    # it reboots.
    "manual_cache_clean": True,

[ubuntu-server-builder]

Launchpad user Launchpad Janitor(janitor) wrote on 2018-01-15T16:37:43.045862+00:00

This bug was fixed in the package cloud-init - 17.2-13-g6299e8d0-0ubuntu1

---

cloud-init (17.2-13-g6299e8d0-0ubuntu1) bionic; urgency=medium

• New upstream snapshot.
  • Do not log warning on config files that represent None. (LP: #1742479)
  • tests: Use git hash pip dependency format for pylxd. [Chad Smith]
  • tests: add integration requirements text file [Joshua Powers]
  • MAAS: add check_instance_id based off oauth tokens. (LP: #1712680)

-- Scott Moser smoser@ubuntu.com Mon, 15 Jan 2018 10:15:05 -0500

[ubuntu-server-builder]

Launchpad user Scott Moser(smoser) wrote on 2018-02-22T22:33:34.350657+00:00

This bug is believed to be fixed in cloud-init in 18.1. If this is still a problem for you, please make a comment and set the state back to New

Thank you.