851 lines
28 KiB
Python
851 lines
28 KiB
Python
#!/usr/bin/env python
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# Copyright 2015 Sam Yaple
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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DOCUMENTATION = '''
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---
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module: kolla_docker
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short_description: Module for controlling Docker
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description:
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- A module targeting at controlling Docker as used by Kolla.
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options:
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common_options:
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description:
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- A dict containing common params such as login info
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required: False
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type: dict
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default: dict()
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action:
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description:
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- The action the module should take
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required: True
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type: str
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choices:
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- compare_container
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- compare_image
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- create_volume
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- get_container_env
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- get_container_state
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- pull_image
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- remove_container
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- remove_volume
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- recreate_or_restart_container
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- restart_container
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- start_container
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- stop_container
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api_version:
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description:
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- The version of the api for docker-py to use when contacting docker
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required: False
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type: str
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default: auto
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auth_email:
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description:
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- The email address used to authenticate
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required: False
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type: str
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auth_password:
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description:
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- The password used to authenticate
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required: False
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type: str
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auth_registry:
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description:
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- The registry to authenticate
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required: False
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type: str
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auth_username:
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description:
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- The username used to authenticate
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required: False
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type: str
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detach:
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description:
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- Detach from the container after it is created
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required: False
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default: True
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type: bool
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name:
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description:
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- Name of the container or volume to manage
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required: False
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type: str
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environment:
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description:
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- The environment to set for the container
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required: False
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type: dict
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image:
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description:
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- Name of the docker image
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required: False
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type: str
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ipc_mode:
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description:
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- Set docker ipc namespace
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required: False
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type: str
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default: None
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choices:
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- host
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cap_add:
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description:
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- Add capabilities to docker container
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required: False
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type: list
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default: list()
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security_opt:
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description:
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- Set container security profile
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required: False
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type: list
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default: list()
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labels:
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description:
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- List of labels to apply to container
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required: False
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type: dict
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default: dict()
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pid_mode:
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description:
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- Set docker pid namespace
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required: False
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type: str
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default: None
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choices:
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- host
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privileged:
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description:
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- Set the container to privileged
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required: False
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default: False
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type: bool
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remove_on_exit:
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description:
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- When not detaching from container, remove on successful exit
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required: False
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default: True
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type: bool
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restart_policy:
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description:
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- Determine what docker does when the container exits
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required: False
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type: str
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choices:
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- never
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- on-failure
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- always
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- unless-stopped
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restart_retries:
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description:
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- How many times to attempt a restart if restart_policy is set
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type: int
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default: 10
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volumes:
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description:
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- Set volumes for docker to use
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required: False
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type: list
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volumes_from:
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description:
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- Name or id of container(s) to use volumes from
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required: True
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type: list
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state:
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description:
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- Check container status
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required: False
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type: str
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choices:
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- running
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- exited
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- paused
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author: Sam Yaple
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'''
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EXAMPLES = '''
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- hosts: kolla_docker
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tasks:
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- name: Start container
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kolla_docker:
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image: ubuntu
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name: test_container
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action: start_container
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- name: Remove container
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kolla_docker:
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name: test_container
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action: remove_container
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- name: Pull image without starting container
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kolla_docker:
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action: pull_image
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image: private-registry.example.com:5000/ubuntu
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- name: Create named volume
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action: create_volume
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name: name_of_volume
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- name: Remove named volume
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action: remove_volume
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name: name_of_volume
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'''
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import json
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import os
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import traceback
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import docker
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def get_docker_client():
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return docker.APIClient
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class DockerWorker(object):
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def __init__(self, module):
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self.module = module
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self.params = self.module.params
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self.changed = False
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# TLS not fully implemented
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# tls_config = self.generate_tls()
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options = {
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'version': self.params.get('api_version')
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}
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self.dc = get_docker_client()(**options)
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def generate_tls(self):
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tls = {'verify': self.params.get('tls_verify')}
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tls_cert = self.params.get('tls_cert'),
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tls_key = self.params.get('tls_key'),
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tls_cacert = self.params.get('tls_cacert')
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if tls['verify']:
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if tls_cert:
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self.check_file(tls_cert)
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self.check_file(tls_key)
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tls['client_cert'] = (tls_cert, tls_key)
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if tls_cacert:
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self.check_file(tls_cacert)
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tls['verify'] = tls_cacert
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return docker.tls.TLSConfig(**tls)
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def check_file(self, path):
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if not os.path.isfile(path):
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self.module.fail_json(
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failed=True,
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msg='There is no file at "{}"'.format(path)
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)
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if not os.access(path, os.R_OK):
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self.module.fail_json(
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failed=True,
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msg='Permission denied for file at "{}"'.format(path)
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)
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def check_image(self):
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find_image = ':'.join(self.parse_image())
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for image in self.dc.images():
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repo_tags = image.get('RepoTags')
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if not repo_tags:
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continue
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for image_name in repo_tags:
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if image_name == find_image:
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return image
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def check_volume(self):
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for vol in self.dc.volumes()['Volumes'] or list():
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if vol['Name'] == self.params.get('name'):
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return vol
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def check_container(self):
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find_name = '/{}'.format(self.params.get('name'))
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for cont in self.dc.containers(all=True):
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if find_name in cont['Names']:
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return cont
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def get_container_info(self):
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container = self.check_container()
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if not container:
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return None
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return self.dc.inspect_container(self.params.get('name'))
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def compare_container(self):
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container = self.check_container()
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if not container or self.check_container_differs():
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self.changed = True
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return self.changed
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def check_container_differs(self):
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container_info = self.get_container_info()
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return (
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self.compare_cap_add(container_info) or
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self.compare_security_opt(container_info) or
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self.compare_image(container_info) or
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self.compare_ipc_mode(container_info) or
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self.compare_labels(container_info) or
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self.compare_privileged(container_info) or
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self.compare_pid_mode(container_info) or
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self.compare_volumes(container_info) or
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self.compare_volumes_from(container_info) or
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self.compare_environment(container_info) or
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self.compare_container_state(container_info)
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)
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def compare_ipc_mode(self, container_info):
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new_ipc_mode = self.params.get('ipc_mode')
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current_ipc_mode = container_info['HostConfig'].get('IpcMode')
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if not current_ipc_mode:
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current_ipc_mode = None
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# only check IPC mode if it is specified
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if new_ipc_mode is not None and new_ipc_mode != current_ipc_mode:
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return True
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return False
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def compare_cap_add(self, container_info):
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new_cap_add = self.params.get('cap_add', list())
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current_cap_add = container_info['HostConfig'].get('CapAdd',
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list())
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if not current_cap_add:
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current_cap_add = list()
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if set(new_cap_add).symmetric_difference(set(current_cap_add)):
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return True
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def compare_security_opt(self, container_info):
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ipc_mode = self.params.get('ipc_mode')
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pid_mode = self.params.get('pid_mode')
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privileged = self.params.get('privileged', False)
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# NOTE(jeffrey4l) security opt is disabled when using host ipc mode or
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# host pid mode or privileged. So no need to compare security opts
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if ipc_mode == 'host' or pid_mode == 'host' or privileged:
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return False
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new_sec_opt = self.params.get('security_opt', list())
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current_sec_opt = container_info['HostConfig'].get('SecurityOpt',
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list())
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if not current_sec_opt:
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current_sec_opt = list()
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if set(new_sec_opt).symmetric_difference(set(current_sec_opt)):
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return True
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def compare_pid_mode(self, container_info):
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new_pid_mode = self.params.get('pid_mode')
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current_pid_mode = container_info['HostConfig'].get('PidMode')
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if not current_pid_mode:
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current_pid_mode = None
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if new_pid_mode != current_pid_mode:
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return True
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def compare_privileged(self, container_info):
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new_privileged = self.params.get('privileged')
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current_privileged = container_info['HostConfig']['Privileged']
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if new_privileged != current_privileged:
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return True
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def compare_image(self, container_info=None):
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container_info = container_info or self.get_container_info()
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parse_repository_tag = docker.utils.parse_repository_tag
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if not container_info:
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return True
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new_image = self.check_image()
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current_image = container_info['Image']
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if not new_image:
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return True
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if new_image['Id'] != current_image:
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return True
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# NOTE(Jeffrey4l) when new image and the current image have
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# the same id, but the tag name different.
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elif (parse_repository_tag(container_info['Config']['Image']) !=
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parse_repository_tag(self.params.get('image'))):
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return True
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def compare_labels(self, container_info):
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new_labels = self.params.get('labels')
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current_labels = container_info['Config'].get('Labels', dict())
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image_labels = self.check_image().get('Labels', dict())
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for k, v in image_labels.items():
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if k in new_labels:
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if v != new_labels[k]:
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return True
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else:
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del current_labels[k]
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if new_labels != current_labels:
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return True
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def compare_volumes_from(self, container_info):
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new_vols_from = self.params.get('volumes_from')
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current_vols_from = container_info['HostConfig'].get('VolumesFrom')
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if not new_vols_from:
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new_vols_from = list()
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if not current_vols_from:
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current_vols_from = list()
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if set(current_vols_from).symmetric_difference(set(new_vols_from)):
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return True
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def compare_volumes(self, container_info):
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volumes, binds = self.generate_volumes()
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current_vols = container_info['Config'].get('Volumes')
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current_binds = container_info['HostConfig'].get('Binds')
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if not volumes:
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volumes = list()
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if not current_vols:
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current_vols = list()
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if not current_binds:
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current_binds = list()
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if set(volumes).symmetric_difference(set(current_vols)):
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return True
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new_binds = list()
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if binds:
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for k, v in binds.items():
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new_binds.append("{}:{}:{}".format(k, v['bind'], v['mode']))
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if set(new_binds).symmetric_difference(set(current_binds)):
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return True
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def compare_environment(self, container_info):
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if self.params.get('environment'):
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current_env = dict()
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for kv in container_info['Config'].get('Env', list()):
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k, v = kv.split('=', 1)
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current_env.update({k: v})
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for k, v in self.params.get('environment').items():
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if k not in current_env:
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return True
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if current_env[k] != v:
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return True
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def compare_container_state(self, container_info):
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new_state = self.params.get('state')
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current_state = container_info['State'].get('Status')
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if new_state != current_state:
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return True
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def parse_image(self):
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full_image = self.params.get('image')
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if '/' in full_image:
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registry, image = full_image.split('/', 1)
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else:
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image = full_image
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if ':' in image:
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return full_image.rsplit(':', 1)
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else:
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return full_image, 'latest'
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def get_image_id(self):
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full_image = self.params.get('image')
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image = self.dc.images(name=full_image, quiet=True)
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return image[0] if len(image) == 1 else None
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def pull_image(self):
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if self.params.get('auth_username'):
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self.dc.login(
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username=self.params.get('auth_username'),
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password=self.params.get('auth_password'),
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registry=self.params.get('auth_registry'),
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email=self.params.get('auth_email')
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)
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image, tag = self.parse_image()
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old_image_id = self.get_image_id()
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statuses = [
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json.loads(line.strip().decode('utf-8')) for line in self.dc.pull(
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repository=image, tag=tag, stream=True
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)
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]
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for status in reversed(statuses):
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if 'error' in status:
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if status['error'].endswith('not found'):
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self.module.fail_json(
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msg="The requested image does not exist: {}:{}".format(
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image, tag),
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failed=True
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)
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else:
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self.module.fail_json(
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msg="Unknown error message: {}".format(
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status['error']),
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failed=True
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)
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new_image_id = self.get_image_id()
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self.changed = old_image_id != new_image_id
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def remove_container(self):
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if self.check_container():
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self.changed = True
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# NOTE(jeffrey4l): in some case, docker failed to remove container
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# filesystem and raise error. But the container info is
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# disappeared already. If this happens, assume the container is
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# removed.
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try:
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self.dc.remove_container(
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container=self.params.get('name'),
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force=True
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)
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except docker.errors.APIError:
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if self.check_container():
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raise
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def generate_volumes(self):
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volumes = self.params.get('volumes')
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if not volumes:
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return None, None
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vol_list = list()
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vol_dict = dict()
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for vol in volumes:
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if len(vol) == 0:
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continue
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if ':' not in vol:
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vol_list.append(vol)
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continue
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split_vol = vol.split(':')
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if (len(split_vol) == 2
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and ('/' not in split_vol[0] or '/' in split_vol[1])):
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split_vol.append('rw')
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vol_list.append(split_vol[1])
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vol_dict.update({
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split_vol[0]: {
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'bind': split_vol[1],
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'mode': split_vol[2]
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}
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})
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return vol_list, vol_dict
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def build_host_config(self, binds):
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options = {
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'network_mode': 'host',
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'ipc_mode': self.params.get('ipc_mode'),
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'cap_add': self.params.get('cap_add'),
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'security_opt': self.params.get('security_opt'),
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'pid_mode': self.params.get('pid_mode'),
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'privileged': self.params.get('privileged'),
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'volumes_from': self.params.get('volumes_from')
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}
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if self.params.get('dimensions'):
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supported = {'cpu_period', 'cpu_quota', 'cpu_shares',
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'cpuset_cpus', 'cpuset_mems', 'mem_limit',
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'mem_reservation', 'memswap_limit',
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'kernel_memory', 'blkio_weight'}
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unsupported = set(self.params.get('dimensions')) - supported
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if unsupported:
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self.module.exit_json(failed=True,
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msg=repr("Unsupported dimensions"),
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unsupported_dimensions=unsupported)
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|
options.update(self.params.get('dimensions'))
|
|
|
|
if self.params.get('restart_policy') in ['on-failure',
|
|
'always',
|
|
'unless-stopped']:
|
|
policy = {'Name': self.params.get('restart_policy')}
|
|
# NOTE(Jeffrey4l): MaximumRetryCount is only needed for on-failure
|
|
# policy
|
|
if self.params.get('restart_policy') == 'on-failure':
|
|
retries = self.params.get('restart_retries')
|
|
policy['MaximumRetryCount'] = retries
|
|
options['restart_policy'] = policy
|
|
|
|
if binds:
|
|
options['binds'] = binds
|
|
|
|
return self.dc.create_host_config(**options)
|
|
|
|
def _inject_env_var(self, environment_info):
|
|
newenv = {
|
|
'KOLLA_SERVICE_NAME': self.params.get('name').replace('_', '-')
|
|
}
|
|
environment_info.update(newenv)
|
|
return environment_info
|
|
|
|
def _format_env_vars(self):
|
|
env = self._inject_env_var(self.params.get('environment'))
|
|
return {k: "" if env[k] is None else env[k] for k in env}
|
|
|
|
def build_container_options(self):
|
|
volumes, binds = self.generate_volumes()
|
|
return {
|
|
'detach': self.params.get('detach'),
|
|
'environment': self._format_env_vars(),
|
|
'host_config': self.build_host_config(binds),
|
|
'labels': self.params.get('labels'),
|
|
'image': self.params.get('image'),
|
|
'name': self.params.get('name'),
|
|
'volumes': volumes,
|
|
'tty': True
|
|
}
|
|
|
|
def create_container(self):
|
|
self.changed = True
|
|
options = self.build_container_options()
|
|
self.dc.create_container(**options)
|
|
|
|
def recreate_or_restart_container(self):
|
|
self.changed = True
|
|
container = self.check_container()
|
|
# get config_strategy from env
|
|
environment = self.params.get('environment')
|
|
config_strategy = environment.get('KOLLA_CONFIG_STRATEGY')
|
|
|
|
if not container:
|
|
self.start_container()
|
|
return
|
|
# If config_strategy is COPY_ONCE or container's parameters are
|
|
# changed, try to start a new one.
|
|
if config_strategy == 'COPY_ONCE' or self.check_container_differs():
|
|
self.stop_container()
|
|
self.remove_container()
|
|
self.start_container()
|
|
elif config_strategy == 'COPY_ALWAYS':
|
|
self.restart_container()
|
|
|
|
def start_container(self):
|
|
if not self.check_image():
|
|
self.pull_image()
|
|
|
|
container = self.check_container()
|
|
if container and self.check_container_differs():
|
|
self.stop_container()
|
|
self.remove_container()
|
|
container = self.check_container()
|
|
|
|
if not container:
|
|
self.create_container()
|
|
container = self.check_container()
|
|
|
|
if not container['Status'].startswith('Up '):
|
|
self.changed = True
|
|
self.dc.start(container=self.params.get('name'))
|
|
|
|
# We do not want to detach so we wait around for container to exit
|
|
if not self.params.get('detach'):
|
|
rc = self.dc.wait(self.params.get('name'))
|
|
# NOTE(jeffrey4l): since python docker package 3.0, wait return a
|
|
# dict all the time.
|
|
if isinstance(rc, dict):
|
|
rc = rc['StatusCode']
|
|
if rc != 0:
|
|
self.module.fail_json(
|
|
failed=True,
|
|
changed=True,
|
|
msg="Container exited with non-zero return code %s" % rc
|
|
)
|
|
if self.params.get('remove_on_exit'):
|
|
self.stop_container()
|
|
self.remove_container()
|
|
|
|
def get_container_env(self):
|
|
name = self.params.get('name')
|
|
info = self.get_container_info()
|
|
if not info:
|
|
self.module.fail_json(msg="No such container: {}".format(name))
|
|
else:
|
|
envs = dict()
|
|
for env in info['Config']['Env']:
|
|
if '=' in env:
|
|
key, value = env.split('=', 1)
|
|
else:
|
|
key, value = env, ''
|
|
envs[key] = value
|
|
|
|
self.module.exit_json(**envs)
|
|
|
|
def get_container_state(self):
|
|
name = self.params.get('name')
|
|
info = self.get_container_info()
|
|
if not info:
|
|
self.module.fail_json(msg="No such container: {}".format(name))
|
|
else:
|
|
self.module.exit_json(**info['State'])
|
|
|
|
def stop_container(self):
|
|
name = self.params.get('name')
|
|
graceful_timeout = self.params.get('graceful_timeout')
|
|
if not graceful_timeout:
|
|
graceful_timeout = 10
|
|
container = self.check_container()
|
|
if not container:
|
|
self.module.fail_json(
|
|
msg="No such container: {} to stop".format(name))
|
|
elif not container['Status'].startswith('Exited '):
|
|
self.changed = True
|
|
self.dc.stop(name, timeout=graceful_timeout)
|
|
|
|
def restart_container(self):
|
|
name = self.params.get('name')
|
|
graceful_timeout = self.params.get('graceful_timeout')
|
|
if not graceful_timeout:
|
|
graceful_timeout = 10
|
|
info = self.get_container_info()
|
|
if not info:
|
|
self.module.fail_json(
|
|
msg="No such container: {}".format(name))
|
|
else:
|
|
self.changed = True
|
|
self.dc.stop(name, timeout=graceful_timeout)
|
|
self.dc.start(name)
|
|
|
|
def create_volume(self):
|
|
if not self.check_volume():
|
|
self.changed = True
|
|
self.dc.create_volume(name=self.params.get('name'), driver='local')
|
|
|
|
def remove_volume(self):
|
|
if self.check_volume():
|
|
self.changed = True
|
|
try:
|
|
self.dc.remove_volume(name=self.params.get('name'))
|
|
except docker.errors.APIError as e:
|
|
if e.response.status_code == 409:
|
|
self.module.fail_json(
|
|
failed=True,
|
|
msg="Volume named '{}' is currently in-use".format(
|
|
self.params.get('name')
|
|
)
|
|
)
|
|
raise
|
|
|
|
|
|
def generate_module():
|
|
# NOTE(jeffrey4l): add empty string '' to choices let us use
|
|
# pid_mode: "{{ service.pid_mode | default ('') }}" in yaml
|
|
argument_spec = dict(
|
|
common_options=dict(required=False, type='dict', default=dict()),
|
|
action=dict(required=True, type='str',
|
|
choices=['compare_container', 'compare_image',
|
|
'create_volume', 'get_container_env',
|
|
'get_container_state', 'pull_image',
|
|
'recreate_or_restart_container',
|
|
'remove_container', 'remove_volume',
|
|
'restart_container', 'start_container',
|
|
'stop_container']),
|
|
api_version=dict(required=False, type='str', default='auto'),
|
|
auth_email=dict(required=False, type='str'),
|
|
auth_password=dict(required=False, type='str', no_log=True),
|
|
auth_registry=dict(required=False, type='str'),
|
|
auth_username=dict(required=False, type='str'),
|
|
detach=dict(required=False, type='bool', default=True),
|
|
labels=dict(required=False, type='dict', default=dict()),
|
|
name=dict(required=False, type='str'),
|
|
environment=dict(required=False, type='dict'),
|
|
image=dict(required=False, type='str'),
|
|
ipc_mode=dict(required=False, type='str', choices=['',
|
|
'host',
|
|
'private',
|
|
'shareable']),
|
|
cap_add=dict(required=False, type='list', default=list()),
|
|
security_opt=dict(required=False, type='list', default=list()),
|
|
pid_mode=dict(required=False, type='str', choices=['host', '']),
|
|
privileged=dict(required=False, type='bool', default=False),
|
|
graceful_timeout=dict(required=False, type='int', default=10),
|
|
remove_on_exit=dict(required=False, type='bool', default=True),
|
|
restart_policy=dict(required=False, type='str', choices=[
|
|
'no',
|
|
'never',
|
|
'on-failure',
|
|
'always',
|
|
'unless-stopped']),
|
|
restart_retries=dict(required=False, type='int', default=10),
|
|
state=dict(required=False, type='str', default='running',
|
|
choices=['running',
|
|
'exited',
|
|
'paused']),
|
|
tls_verify=dict(required=False, type='bool', default=False),
|
|
tls_cert=dict(required=False, type='str'),
|
|
tls_key=dict(required=False, type='str'),
|
|
tls_cacert=dict(required=False, type='str'),
|
|
volumes=dict(required=False, type='list'),
|
|
volumes_from=dict(required=False, type='list'),
|
|
dimensions=dict(required=False, type='dict', default=dict())
|
|
)
|
|
required_if = [
|
|
['action', 'pull_image', ['image']],
|
|
['action', 'start_container', ['image', 'name']],
|
|
['action', 'compare_container', ['name']],
|
|
['action', 'compare_image', ['name']],
|
|
['action', 'create_volume', ['name']],
|
|
['action', 'get_container_env', ['name']],
|
|
['action', 'get_container_state', ['name']],
|
|
['action', 'recreate_or_restart_container', ['name']],
|
|
['action', 'remove_container', ['name']],
|
|
['action', 'remove_volume', ['name']],
|
|
['action', 'restart_container', ['name']],
|
|
['action', 'stop_container', ['name']]
|
|
]
|
|
module = AnsibleModule(
|
|
argument_spec=argument_spec,
|
|
required_if=required_if,
|
|
bypass_checks=False
|
|
)
|
|
|
|
new_args = module.params.pop('common_options', dict())
|
|
|
|
# NOTE(jeffrey4l): merge the environment
|
|
env = module.params.pop('environment', dict())
|
|
if env:
|
|
new_args['environment'].update(env)
|
|
|
|
for key, value in module.params.items():
|
|
if key in new_args and value is None:
|
|
continue
|
|
new_args[key] = value
|
|
|
|
# if pid_mode = ""/None/False, remove it
|
|
if not new_args.get('pid_mode', False):
|
|
new_args.pop('pid_mode', None)
|
|
# if ipc_mode = ""/None/False, remove it
|
|
if not new_args.get('ipc_mode', False):
|
|
new_args.pop('ipc_mode', None)
|
|
|
|
module.params = new_args
|
|
return module
|
|
|
|
|
|
def main():
|
|
module = generate_module()
|
|
|
|
try:
|
|
dw = DockerWorker(module)
|
|
# TODO(inc0): We keep it bool to have ansible deal with consistent
|
|
# types. If we ever add method that will have to return some
|
|
# meaningful data, we need to refactor all methods to return dicts.
|
|
result = bool(getattr(dw, module.params.get('action'))())
|
|
module.exit_json(changed=dw.changed, result=result)
|
|
except Exception:
|
|
module.exit_json(failed=True, changed=True,
|
|
msg=repr(traceback.format_exc()))
|
|
|
|
# import module snippets
|
|
from ansible.module_utils.basic import * # noqa
|
|
if __name__ == '__main__':
|
|
main()
|