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Add support for legacy registries to pull_image().

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Since we now have several exceptions to the assumption that the
result of the pull would be on the last status line returned by
docker-py's pull(), I've changed the function so that it looks
through the status lines and returns what if finds on it.
Despite the repeated `break`s, the code seems simpler and a little
more coherent like this. From what I've checked using
`https://github.com/jlafon/ansible-profile`, the execution time is
mostly the same.
This commit is contained in:
Manuel Tiago Pereira 2015-10-28 11:35:14 +00:00
parent eeaeeb5a1f
commit 3079c5e001
1 changed files with 15 additions and 19 deletions
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32
cloud/docker/docker.py
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@ -1390,24 +1390,20 @@ class DockerManager(object):
self.module.fail_json(msg="failed to login to the remote registry, check your username/password.", error=repr(e))
try:
changes = list(self.client.pull(image, tag=tag, stream=True, **extra_params))
try:
last = changes[-1]
# seems Docker 1.8 puts an empty dict at the end of the
# stream; catch that and get the previous instead
# https://github.com/ansible/ansible-modules-core/issues/2043
if last.strip() == '{}':
last = changes[-2]
except IndexError:
last = '{}'
status = json.loads(last).get('status', '')
if status.startswith('Status: Image is up to date for'):
# Image is already up to date. Don't increment the counter.
pass
elif (status.startswith('Status: Downloaded newer image for') or
status.startswith('Download complete')):
# Image was updated. Increment the pull counter.
self.increment_counter('pulled')
else:
pull_success = False
for change in changes:
status = json.loads(change).get('status', '')
if status.startswith('Status: Image is up to date for'):
# Image is already up to date. Don't increment the counter.
pull_success = True
break
elif (status.startswith('Status: Downloaded newer image for') or
status.startswith('Download complete')):
# Image was updated. Increment the pull counter.
self.increment_counter('pulled')
pull_success = True
break
if not pull_success:
# Unrecognized status string.
self.module.fail_json(msg="Unrecognized status from pull.", status=status, changes=changes)
except Exception as e: