Merge pull request #15509 from chouseknecht/docker_common
Adding docker_common util module.
This commit is contained in:
Chris Houseknecht
commit
b91eeee42a
1 changed files with 431 additions and 0 deletions
431
lib/ansible/module_utils/docker_common.py
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431
lib/ansible/module_utils/docker_common.py
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#
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# Copyright 2016 Red Hat | Ansible
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#
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# This file is part of Ansible
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#
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# Ansible is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# Ansible is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
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import os
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import re
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import json
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import sys
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import copy
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from urlparse import urlparse
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from ansible.module_utils.basic import *
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HAS_DOCKER_PY = True
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HAS_DOCKER_ERROR = None
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try:
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from requests.exceptions import SSLError
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from docker import Client
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from docker import __version__ as docker_version
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from docker.errors import APIError, TLSParameterError, NotFound
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from docker.tls import TLSConfig
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from docker.constants import DEFAULT_TIMEOUT_SECONDS, DEFAULT_DOCKER_API_VERSION
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from docker.utils.types import Ulimit, LogConfig
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except ImportError, exc:
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HAS_DOCKER_ERROR = str(exc)
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HAS_DOCKER_PY = False
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DEFAULT_DOCKER_HOST = 'unix://var/run/docker.sock'
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DEFAULT_TLS = False
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DEFAULT_TLS_VERIFY = False
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MIN_DOCKER_VERSION = "1.7.0"
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DOCKER_COMMON_ARGS = dict(
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docker_host=dict(type='str', aliases=['docker_url']),
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tls_hostname=dict(type='str'),
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api_version=dict(type='str', aliases=['docker_api_version']),
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timeout=dict(type='int'),
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cacert_path=dict(type='str', aliases=['tls_ca_cert']),
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cert_path=dict(type='str', aliases=['tls_client_cert']),
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key_path=dict(type='str', aliases=['tls_client_key']),
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ssl_version=dict(type='str'),
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tls=dict(type='bool'),
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tls_verify=dict(type='bool'),
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debug=dict(type='bool', default=False),
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filter_logger=dict(type='bool', default=False),
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)
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DOCKER_MUTUALLY_EXCLUSIVE = [
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['tls', 'tls_verify']
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]
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DOCKER_REQUIRED_TOGETHER = [
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['cert_path', 'key_path']
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]
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DEFAULT_DOCKER_REGISTRY = 'https://index.docker.io/v1/'
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EMAIL_REGEX = '[^@]+@[^@]+\.[^@]+'
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BYTE_SUFFIXES = ['B', 'KB', 'MB', 'GB', 'TB', 'PB']
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if not HAS_DOCKER_PY:
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# No docker-py. Create a place holder client to allow
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# instantiation of AnsibleModule and proper error handing
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class Client(object):
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def __init__(self, **kwargs):
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pass
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def human_to_bytes(number):
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if number is None:
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return 0
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if isinstance(number, int):
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return number
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if number[-1].isdigit():
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return int(number)
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if number[-1] == BYTE_SUFFIXES[0] and number[-2].isdigit():
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return int(number[:-1])
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i = 1
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for each in BYTE_SUFFIXES[1:]:
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if number[-len(each):] == BYTE_SUFFIXES[i]:
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return int(number[:-len(each)]) * (1024 ** i)
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i += 1
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raise ValueError("Failed to convert %s. The suffix must be one of %s" % (number, ','.join(BYTE_SUFFIXES)))
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class DockerBaseClass(object):
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def __init__(self):
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self.debug = False
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def log(self, msg, pretty_print=False):
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pass
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# if self.debug:
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# log_file = open('docker.log', 'a')
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# if pretty_print:
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# log_file.write(json.dumps(msg, sort_keys=True, indent=4, separators=(',', ': ')))
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# else:
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# log_file.write(msg + u'\n')
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class AnsibleDockerClient(Client):
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def __init__(self, argument_spec=None, supports_check_mode=False, mutually_exclusive=None,
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required_together=None, required_if=None):
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merged_arg_spec = dict()
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merged_arg_spec.update(DOCKER_COMMON_ARGS)
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if argument_spec:
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merged_arg_spec.update(argument_spec)
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self.arg_spec = merged_arg_spec
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mutually_exclusive_params = []
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mutually_exclusive_params += DOCKER_MUTUALLY_EXCLUSIVE
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if mutually_exclusive:
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mutually_exclusive_params += mutually_exclusive
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required_together_params = []
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required_together_params += DOCKER_REQUIRED_TOGETHER
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if required_together:
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required_together_params += required_together
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self.module = AnsibleModule(
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argument_spec=merged_arg_spec,
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supports_check_mode=supports_check_mode,
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mutually_exclusive=mutually_exclusive_params,
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required_together=required_together_params,
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required_if=required_if)
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if not HAS_DOCKER_PY:
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self.fail("Failed to import docker-py - %s. Try `pip install docker-py`" % HAS_DOCKER_ERROR)
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if docker_version < MIN_DOCKER_VERSION:
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self.fail("Error: docker-py version is %s. Minimum version required is %s." % (docker_version,
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MIN_DOCKER_VERSION))
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self.debug = self.module.params.get('debug')
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self.check_mode = self.module.check_mode
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self._connect_params = self._get_connect_params()
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try:
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super(AnsibleDockerClient, self).__init__(**self._connect_params)
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except APIError, exc:
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self.fail("Docker API error: %s" % exc)
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except Exception, exc:
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self.fail("Error connecting: %s" % exc)
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def log(self, msg, pretty_print=False):
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pass
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# if self.debug:
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# log_file = open('docker.log', 'a')
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# if pretty_print:
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# log_file.write(json.dumps(msg, sort_keys=True, indent=4, separators=(',', ': ')))
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# else:
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# log_file.write(msg + u'\n')
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def fail(self, msg):
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self.module.fail_json(msg=msg)
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@staticmethod
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def _get_value(param_name, param_value, env_variable, default_value):
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if param_value is not None:
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# take module parameter value
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if param_value in BOOLEANS_TRUE:
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return True
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if param_value in BOOLEANS_FALSE:
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return False
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return param_value
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if env_variable is not None:
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env_value = os.environ.get(env_variable)
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if env_value is not None:
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# take the env variable value
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if param_name == 'cert_path':
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return os.path.join(env_value, 'cert.pem')
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if param_name == 'cacert_path':
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return os.path.join(env_value, 'ca.pem')
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if param_name == 'key_path':
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return os.path.join(env_value, 'key.pem')
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if env_value in BOOLEANS_TRUE:
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return True
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if env_value in BOOLEANS_FALSE:
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return False
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return env_value
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# take the default
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return default_value
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@property
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def auth_params(self):
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# Get authentication credentials.
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# Precedence: module parameters-> environment variables-> defaults.
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self.log('Getting credentials')
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params = dict()
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for key in DOCKER_COMMON_ARGS:
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params[key] = self.module.params.get(key)
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if self.module.params.get('use_tls'):
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# support use_tls option in docker_image.py. This will be deprecated.
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use_tls = self.module.params.get('use_tls')
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if use_tls == 'encrypt':
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params['tls'] = True
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if use_tls == 'verify':
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params['tls_verify'] = True
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result = dict(
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docker_host=self._get_value('docker_host', params['docker_host'], 'DOCKER_HOST',
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DEFAULT_DOCKER_HOST),
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tls_hostname=self._get_value('tls_hostname', params['tls_hostname'],
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'DOCKER_TLS_HOSTNAME', 'localhost'),
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api_version=self._get_value('api_version', params['api_version'], 'DOCKER_API_VERSION',
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DEFAULT_DOCKER_API_VERSION),
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cacert_path=self._get_value('cacert_path', params['cacert_path'], 'DOCKER_CERT_PATH', None),
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cert_path=self._get_value('cert_path', params['cert_path'], 'DOCKER_CERT_PATH', None),
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key_path=self._get_value('key_path', params['key_path'], 'DOCKER_CERT_PATH', None),
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ssl_version=self._get_value('ssl_version', params['ssl_version'], 'DOCKER_SSL_VERSION', None),
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tls=self._get_value('tls', params['tls'], 'DOCKER_TLS', DEFAULT_TLS),
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tls_verify=self._get_value('tls_verfy', params['tls_verify'], 'DOCKER_TLS_VERIFY',
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DEFAULT_TLS_VERIFY),
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timeout=self._get_value('timeout', params['timeout'], 'DOCKER_TIMEOUT',
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DEFAULT_TIMEOUT_SECONDS),
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)
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if result['tls_hostname'] is None:
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# get default machine name from the url
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parsed_url = urlparse(result['docker_host'])
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if ':' in parsed_url.netloc:
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result['tls_hostname'] = parsed_url.netloc[:parsed_url.netloc.rindex(':')]
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else:
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result['tls_hostname'] = parsed_url
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return result
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def _get_tls_config(self, **kwargs):
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self.log("get_tls_config:")
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for key in kwargs:
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self.log(" %s: %s" % (key, kwargs[key]))
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try:
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tls_config = TLSConfig(**kwargs)
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return tls_config
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except TLSParameterError, exc:
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self.fail("TLS config error: %s" % exc)
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def _get_connect_params(self):
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auth = self.auth_params
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self.log("connection params:")
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for key in auth:
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self.log(" %s: %s" % (key, auth[key]))
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if auth['tls'] or auth['tls_verify']:
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auth['docker_host'] = auth['docker_host'].replace('tcp://', 'https://')
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if auth['tls'] and auth['cert_path'] and auth['key_path']:
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# TLS with certs and no host verification
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tls_config = self._get_tls_config(client_cert=(auth['cert_path'], auth['key_path']),
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verify=False,
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ssl_version=auth['ssl_version'])
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return dict(base_url=auth['docker_host'],
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tls=tls_config,
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version=auth['api_version'],
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timeout=auth['timeout'])
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if auth['tls']:
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# TLS with no certs and not host verification
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tls_config = self._get_tls_config(verify=False,
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ssl_version=auth['ssl_version'])
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return dict(base_url=auth['docker_host'],
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tls=tls_config,
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version=auth['api_version'],
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timeout=auth['timeout'])
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if auth['tls_verify'] and auth['cert_path'] and auth['key_path']:
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# TLS with certs and host verification
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if auth['cacert_path']:
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tls_config = self._get_tls_config(client_cert=(auth['cert_path'], auth['key_path']),
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ca_cert=auth['cacert_path'],
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verify=True,
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assert_hostname=auth['tls_hostname'],
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ssl_version=auth['ssl_version'])
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else:
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tls_config = self._get_tls_config(client_cert=(auth['cert_path'], auth['key_path']),
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verify=True,
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assert_hostname=auth['tls_hostname'],
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ssl_version=auth['ssl_version'])
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return dict(base_url=auth['docker_host'],
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tls=tls_config,
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version=auth['api_version'],
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timeout=auth['timeout'])
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if auth['tls_verify'] and auth['cacert_path']:
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# TLS with cacert only
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tls_config = self._get_tls_config(ca_cert=auth['cacert_path'],
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assert_hostname=auth['tls_hostname'],
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verify=True,
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ssl_version=auth['ssl_version'])
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return dict(base_url=auth['docker_host'],
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tls=tls_config,
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version=auth['api_version'],
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timeout=auth['timeout'])
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if auth['tls_verify']:
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# TLS with verify and no certs
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tls_config = self._get_tls_config(verify=True,
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assert_hostname=auth['tls_hostname'],
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ssl_version=auth['ssl_version'])
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return dict(base_url=auth['docker_host'],
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tls=tls_config,
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version=auth['api_version'],
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timeout=auth['timeout'])
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# No TLS
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return dict(base_url=auth['docker_host'],
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version=auth['api_version'],
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timeout=auth['timeout'])
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def _handle_ssl_error(self, error):
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match = re.match(r"hostname.*doesn\'t match (\'.*\')", str(error))
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if match:
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msg = "You asked for verification that Docker host name matches %s. The actual hostname is %s. " \
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"Most likely you need to set DOCKER_TLS_HOSTNAME or pass tls_hostname with a value of %s. " \
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"You may also use TLS without verification by setting the tls parameter to true." \
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% (self.auth_params['tls_hostname'], match.group(1))
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self.fail(msg)
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self.fail("SSL Exception: %s" % (error))
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def get_container(self, name=None):
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'''
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Lookup a container and return the inspection results.
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'''
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if name is None:
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return None
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search_name = name
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if not name.startswith('/'):
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search_name = '/' + name
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result = None
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try:
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for container in self.containers(all=True):
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self.log("testing container: %s" % (container['Names']))
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if search_name in container['Names']:
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result = container
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break
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if container['Id'].startswith(name):
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result = container
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break
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if container['Id'] == name:
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result = container
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break
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except SSLError, exc:
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self._handle_ssl_error(exc)
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except Exception, exc:
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self.fail("Error retrieving container list: %s" % exc)
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if result is not None:
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try:
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self.log("Inspecting container Id %s" % result['Id'])
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result = self.inspect_container(container=result['Id'])
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self.log("Completed container inspection")
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except Exception, exc:
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self.fail("Error inspecting container: %s" % exc)
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return result
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def find_image(self, name, tag):
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'''
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Lookup an image and return the inspection results.
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'''
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if not name:
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return None
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lookup = name
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if tag:
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lookup = "%s:%s" % (name, tag)
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self.log("Find image %s" % lookup)
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try:
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images = self.images(name=lookup)
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except Exception, exc:
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self.fail("Error getting image: %s" % str(exc))
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if len(images) > 1:
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self.fail("Registry returned more than one result for %s" % lookup)
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if len(images) == 1:
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try:
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inspection = self.inspect_image(images[0]['Id'])
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except Exception, exc:
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self.fail("Error inspecting image %s - %s" % (lookup, str(exc)))
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inspection['Name'] = lookup
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return inspection
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self.log("Image %s not found." % lookup)
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return None
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def pull_image(self, name, tag="latest"):
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'''
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Pull an image
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'''
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try:
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self.log("Pulling image %s:%s" % (name, tag))
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for line in self.pull(name, tag=tag, stream=True):
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response = json.loads(line)
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self.log(response, pretty_print=True)
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return self.find_image(name, tag)
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except Exception, exc:
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self.fail("Error pulling image %s:%s - %s" % (name, tag, str(exc)))
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