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Pull newer image versions when requested.
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parent
6505ce3940
commit
338bbf6efc
1 changed files with 65 additions and 23 deletions
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@ -326,6 +326,8 @@ EXAMPLES = '''
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HAS_DOCKER_PY = True
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HAS_DOCKER_PY = True
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import sys
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import sys
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import json
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import re
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from urlparse import urlparse
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from urlparse import urlparse
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try:
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try:
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import docker.client
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import docker.client
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@ -635,6 +637,18 @@ class DockerManager(object):
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return False
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return False
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def get_inspect_image(self):
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image, tag = get_split_image_tag(self.module.params.get('image'))
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if tag is None:
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tag = 'latest'
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resource = '%s:%s' % (image, tag)
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matching_image = None
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for image in self.client.images(name=image):
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if resource in image.get('RepoTags', []):
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matching_image = image
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return matching_image
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def get_inspect_containers(self, containers):
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def get_inspect_containers(self, containers):
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inspect = []
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inspect = []
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for i in containers:
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for i in containers:
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@ -687,6 +701,41 @@ class DockerManager(object):
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return running
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return running
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def pull_image(self):
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extra_params = {}
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if self.module.params.get('insecure_registry'):
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if self.ensure_capability('insecure_registry', fail=False):
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extra_params['insecure_registry'] = self.module.params.get('insecure_registry')
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resource = self.module.params.get('image')
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image, tag = get_split_image_tag(resource)
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if self.module.params.get('username'):
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try:
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self.client.login(
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self.module.params.get('username'),
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password=self.module.params.get('password'),
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email=self.module.params.get('email'),
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registry=self.module.params.get('registry')
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)
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except:
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self.module.fail_json(msg="failed to login to the remote registry, check your username/password.")
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try:
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last = None
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for line in self.client.pull(image, tag=tag, stream=True, **extra_params):
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last = line
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status = json.loads(last).get('status', '')
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if status.startswith('Status: Image is up to date for'):
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# Image is already up to date. Don't increment the counter.
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pass
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elif status.startswith('Status: Downloaded newer image for'):
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# Image was updated. Increment the pull counter.
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self.increment_counter('pull')
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else:
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# Unrecognized status string.
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self.module.fail_json(msg="Unrecognized status from pull", status=status)
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except:
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self.module.fail_json(msg="failed to pull the specified image: %s" % resource)
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def create_containers(self, count=1):
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def create_containers(self, count=1):
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params = {'image': self.module.params.get('image'),
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params = {'image': self.module.params.get('image'),
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'command': self.module.params.get('command'),
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'command': self.module.params.get('command'),
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@ -708,11 +757,6 @@ class DockerManager(object):
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if params['volumes_from'] is not None:
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if params['volumes_from'] is not None:
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self.ensure_capability('volumes_from')
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self.ensure_capability('volumes_from')
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extra_params = {}
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if self.module.params.get('insecure_registry'):
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if self.ensure_capability('insecure_registry', fail=False):
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extra_params['insecure_registry'] = self.module.params.get('insecure_registry')
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def do_create(count, params):
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def do_create(count, params):
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results = []
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results = []
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for _ in range(count):
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for _ in range(count):
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@ -725,23 +769,7 @@ class DockerManager(object):
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try:
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try:
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containers = do_create(count, params)
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containers = do_create(count, params)
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except:
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except:
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resource = self.module.params.get('image')
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self.pull_image()
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image, tag = get_split_image_tag(resource)
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if self.module.params.get('username'):
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try:
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self.client.login(
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self.module.params.get('username'),
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password=self.module.params.get('password'),
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email=self.module.params.get('email'),
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registry=self.module.params.get('registry')
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)
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except:
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self.module.fail_json(msg="failed to login to the remote registry, check your username/password.")
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try:
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self.client.pull(image, tag=tag, **extra_params)
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except:
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self.module.fail_json(msg="failed to pull the specified image: %s" % resource)
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self.increment_counter('pull')
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containers = do_create(count, params)
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containers = do_create(count, params)
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return containers
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return containers
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@ -807,6 +835,7 @@ def main():
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argument_spec = dict(
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argument_spec = dict(
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count = dict(default=1),
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count = dict(default=1),
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image = dict(required=True),
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image = dict(required=True),
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pull = dict(required=False, default='missing', choices=['missing', 'always']),
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command = dict(required=False, default=None),
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command = dict(required=False, default=None),
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expose = dict(required=False, default=None, type='list'),
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expose = dict(required=False, default=None, type='list'),
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ports = dict(required=False, default=None, type='list'),
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ports = dict(required=False, default=None, type='list'),
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@ -849,12 +878,25 @@ def main():
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count = int(module.params.get('count'))
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count = int(module.params.get('count'))
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name = module.params.get('name')
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name = module.params.get('name')
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image = module.params.get('image')
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image = module.params.get('image')
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pull = module.params.get('pull')
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if count < 0:
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if count < 0:
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module.fail_json(msg="Count must be greater than zero")
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module.fail_json(msg="Count must be greater than zero")
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if count > 1 and name:
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if count > 1 and name:
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module.fail_json(msg="Count and name must not be used together")
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module.fail_json(msg="Count and name must not be used together")
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# Explicitly pull new container images, if requested.
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# Do this before noticing running and deployed containers so that the image names will differ
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# if a newer image has been pulled.
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if pull == "always":
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manager.pull_image()
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# Find the ID of the requested image and tag, if available.
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image_id = None
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inspected_image = manager.get_inspect_image()
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if inspected_image:
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image_id = inspected_image.get('Id')
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running_containers = manager.get_running_containers()
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running_containers = manager.get_running_containers()
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running_count = len(running_containers)
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running_count = len(running_containers)
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delta = count - running_count
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delta = count - running_count
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@ -877,7 +919,7 @@ def main():
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# the named container is running, but with a
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# the named container is running, but with a
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# different image or tag, so we stop it first
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# different image or tag, so we stop it first
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if existing_container and existing_container.get('Config', dict()).get('Image') != image:
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if existing_container and (image_id is None or existing_container.get('Image') != image_id):
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manager.stop_containers([existing_container])
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manager.stop_containers([existing_container])
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manager.remove_containers([existing_container])
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manager.remove_containers([existing_container])
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running_containers = manager.get_running_containers()
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running_containers = manager.get_running_containers()
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