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docker_container: fix behavior when image is not specified (#46322)

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* Don't simply ignore container in present() if image is not specified.

* Use image from existing container for recreation if not specified.

* Added changelog.

* Improve comment.
This commit is contained in:
Felix Fontein 2018-10-06 15:50:12 +02:00 committed by John R Barker
parent 25dfa78dc2
commit 895019c59b
2 changed files with 37 additions and 26 deletions
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2
changelogs/fragments/46322-docker_container-image-not-given.yaml Normal file
View file

@ -0,0 +1,2 @@
bugfixes:
- "docker_container - the behavior is improved in case ``image`` is not specified, but needed for (re-)creating the container."

61
lib/ansible/modules/cloud/docker/docker_container.py
View file

@ -1912,34 +1912,43 @@ class ContainerManager(DockerBaseClass):
container = self._get_container(self.parameters.name)
# If the image parameter was passed then we need to deal with the image
# version comparison, otherwise we should not care
if self.parameters.image:
image = self._get_image()
self.log(image, pretty_print=True)
if not container.exists:
# New container
self.log('No container found')
new_container = self.container_create(self.parameters.image, self.parameters.create_parameters)
# version comparison. Otherwise we handle this depending on whether
# the container already runs or not; in the former case, in case the
# container needs to be restarted, we use the existing container's
# image ID.
image = self._get_image()
self.log(image, pretty_print=True)
if not container.exists:
# New container
self.log('No container found')
if not self.parameters.image:
self.fail('Cannot create container when image is not specified!')
new_container = self.container_create(self.parameters.image, self.parameters.create_parameters)
if new_container:
container = new_container
else:
# Existing container
different, differences = container.has_different_configuration(image)
image_different = False
if self.parameters.comparisons['image']['comparison'] == 'strict':
image_different = self._image_is_different(image, container)
if image_different or different or self.parameters.recreate:
self.diff['differences'] = differences
if image_different:
self.diff['image_different'] = True
self.log("differences")
self.log(differences, pretty_print=True)
image_to_use = self.parameters.image
if not image_to_use and container and container.Image:
image_to_use = container.Image
if not image_to_use:
self.fail('Cannot recreate container when image is not specified or cannot be extracted from current container!')
if container.running:
self.container_stop(container.Id)
self.container_remove(container.Id)
new_container = self.container_create(image_to_use, self.parameters.create_parameters)
if new_container:
container = new_container
else:
# Existing container
different, differences = container.has_different_configuration(image)
image_different = False
if self.parameters.comparisons['image']['comparison'] == 'strict':
image_different = self._image_is_different(image, container)
if image_different or different or self.parameters.recreate:
self.diff['differences'] = differences
if image_different:
self.diff['image_different'] = True
self.log("differences")
self.log(differences, pretty_print=True)
if container.running:
self.container_stop(container.Id)
self.container_remove(container.Id)
new_container = self.container_create(self.parameters.image, self.parameters.create_parameters)
if new_container:
container = new_container
if container and container.exists:
container = self.update_limits(container)