A collection of python libraries for the Validation Framework
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# Copyright 2020 Red Hat, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
#
import ansible_runner
import logging
import pkg_resources
import pwd
import os
import six
import sys
import tempfile
import threading
import yaml
from six.moves import configparser
from validations_libs import constants
LOG = logging.getLogger(__name__ + ".ansible")
# NOTE(cloudnull): This is setting the FileExistsError for py2 environments.
# When we no longer support py2 (centos7) this should be
# removed.
try:
FileExistsError = FileExistsError
except NameError:
FileExistsError = OSError
try:
version = pkg_resources.get_distribution("ansible_runner").version
BACKWARD_COMPAT = (version < '1.4.0')
except pkg_resources.DistributionNotFound:
BACKWARD_COMPAT = False
class Ansible(object):
"""An Object for encapsulating an Ansible execution"""
def __init__(self, uuid=None):
self.log = logging.getLogger(__name__ + ".Ansible")
self.uuid = uuid
def _playbook_check(self, play, playbook_dir=None):
"""Check if playbook exist"""
if not os.path.exists(play):
play = os.path.join(playbook_dir, play)
if not os.path.exists(play):
raise RuntimeError('No such playbook: {}'.format(play))
self.log.debug('Ansible playbook {} found'.format(play))
return play
def _inventory(self, inventory, ansible_artifact_path):
"""Handle inventory for Ansible"""
if inventory:
if isinstance(inventory, six.string_types):
# check is file path
if os.path.exists(inventory):
return os.path.abspath(inventory)
elif isinstance(inventory, dict):
inventory = yaml.safe_dump(
inventory,
default_flow_style=False
)
return ansible_runner.utils.dump_artifact(
inventory,
ansible_artifact_path,
'hosts'
)
def _creates_ansible_fact_dir(self,
temp_suffix='validations-libs-ansible'):
"""Creates ansible fact dir"""
ansible_fact_path = os.path.join(
tempfile.gettempdir(),
temp_suffix,
'fact_cache'
)
try:
os.makedirs(ansible_fact_path)
return ansible_fact_path
except FileExistsError:
self.log.debug(
'Directory "{}" was not created because it'
' already exists.'.format(
ansible_fact_path
)
)
def _get_extra_vars(self, extra_vars):
"""Manage extra_vars into a dict"""
extravars = dict()
if extra_vars:
if isinstance(extra_vars, dict):
extravars.update(extra_vars)
elif os.path.exists(extra_vars) and os.path.isfile(extra_vars):
with open(extra_vars) as f:
extravars.update(yaml.safe_load(f.read()))
return extravars
def _callbacks(self, callback_whitelist, output_callback, envvars={},
env={}):
"""Set callbacks"""
# if output_callback is exported in env, then use it
if isinstance(envvars, dict):
env.update(envvars)
output_callback = env.get('ANSIBLE_STDOUT_CALLBACK', output_callback)
callback_whitelist = ','.join(filter(None, [callback_whitelist,
output_callback,
'validation_json',
'profile_tasks']))
return callback_whitelist, output_callback
def _ansible_env_var(self, output_callback, ssh_user, workdir, connection,
gathering_policy, module_path, key,
extra_env_variables, ansible_timeout,
callback_whitelist, base_dir, python_interpreter,
env={}):
"""Handle Ansible env var for Ansible config execution"""
cwd = os.getcwd()
env['ANSIBLE_SSH_ARGS'] = (
'-o UserKnownHostsFile={} '
'-o StrictHostKeyChecking=no '
'-o ControlMaster=auto '
'-o ControlPersist=30m '
'-o ServerAliveInterval=64 '
'-o ServerAliveCountMax=1024 '
'-o Compression=no '
'-o TCPKeepAlive=yes '
'-o VerifyHostKeyDNS=no '
'-o ForwardX11=no '
'-o ForwardAgent=yes '
'-o PreferredAuthentications=publickey '
'-T'
).format(os.devnull)
env['ANSIBLE_DISPLAY_FAILED_STDERR'] = True
env['ANSIBLE_FORKS'] = 36
env['ANSIBLE_TIMEOUT'] = ansible_timeout
env['ANSIBLE_GATHER_TIMEOUT'] = 45
env['ANSIBLE_SSH_RETRIES'] = 3
env['ANSIBLE_PIPELINING'] = True
if ssh_user:
env['ANSIBLE_REMOTE_USER'] = ssh_user
env['ANSIBLE_STDOUT_CALLBACK'] = output_callback
env['ANSIBLE_LIBRARY'] = os.path.expanduser(
'~/.ansible/plugins/modules:'
'{}:{}:'
'/usr/share/ansible/plugins/modules:'
'/usr/share/ceph-ansible/library:'
'{}/library'.format(
os.path.join(workdir, 'modules'),
os.path.join(cwd, 'modules'),
base_dir
)
)
env['ANSIBLE_LOOKUP_PLUGINS'] = os.path.expanduser(
'~/.ansible/plugins/lookup:'
'{}:{}:'
'/usr/share/ansible/plugins/lookup:'
'/usr/share/ceph-ansible/plugins/lookup:'
'{}/lookup_plugins'.format(
os.path.join(workdir, 'lookup'),
os.path.join(cwd, 'lookup'),
base_dir
)
)
env['ANSIBLE_CALLBACK_PLUGINS'] = os.path.expanduser(
'~/.ansible/plugins/callback:'
'{}:{}:'
'/usr/share/ansible/plugins/callback:'
'/usr/share/ceph-ansible/plugins/callback:'
'{}/callback_plugins'.format(
os.path.join(workdir, 'callback'),
os.path.join(cwd, 'callback'),
base_dir
)
)
env['ANSIBLE_ACTION_PLUGINS'] = os.path.expanduser(
'~/.ansible/plugins/action:'
'{}:{}:'
'/usr/share/ansible/plugins/action:'
'/usr/share/ceph-ansible/plugins/actions:'
'{}/action_plugins'.format(
os.path.join(workdir, 'action'),
os.path.join(cwd, 'action'),
base_dir
)
)
env['ANSIBLE_FILTER_PLUGINS'] = os.path.expanduser(
'~/.ansible/plugins/filter:'
'{}:{}:'
'/usr/share/ansible/plugins/filter:'
'/usr/share/ceph-ansible/plugins/filter:'
'{}/filter_plugins'.format(
os.path.join(workdir, 'filter'),
os.path.join(cwd, 'filter'),
base_dir
)
)
env['ANSIBLE_ROLES_PATH'] = os.path.expanduser(
'~/.ansible/roles:'
'{}:{}:'
'/usr/share/ansible/roles:'
'/usr/share/ceph-ansible/roles:'
'/etc/ansible/roles:'
'{}/roles'.format(
os.path.join(workdir, 'roles'),
os.path.join(cwd, 'roles'),
base_dir
)
)
env['ANSIBLE_CALLBACK_WHITELIST'] = callback_whitelist
env['ANSIBLE_RETRY_FILES_ENABLED'] = False
env['ANSIBLE_HOST_KEY_CHECKING'] = False
env['ANSIBLE_TRANSPORT'] = connection
env['ANSIBLE_CACHE_PLUGIN_TIMEOUT'] = 7200
if self.uuid:
env['ANSIBLE_UUID'] = self.uuid
if python_interpreter:
env['ANSIBLE_PYTHON_INTERPRETER'] = python_interpreter
elif connection == 'local':
env['ANSIBLE_PYTHON_INTERPRETER'] = sys.executable
if gathering_policy in ('smart', 'explicit', 'implicit'):
env['ANSIBLE_GATHERING'] = gathering_policy
if module_path:
env['ANSIBLE_LIBRARY'] = ':'.join(
[env['ANSIBLE_LIBRARY'], module_path]
)
try:
user_pwd = pwd.getpwuid(int(os.getenv('SUDO_UID', os.getuid())))
except TypeError:
home = os.path.expanduser('~')
else:
home = user_pwd.pw_dir
env['ANSIBLE_LOG_PATH'] = os.path.join(home, 'ansible.log')
if key:
env['ANSIBLE_PRIVATE_KEY_FILE'] = key
if extra_env_variables:
if not isinstance(extra_env_variables, dict):
msg = "extra_env_variables must be a dict"
self.log.error(msg)
raise SystemError(msg)
else:
env.update(extra_env_variables)
return env
def _encode_envvars(self, env):
"""Encode a hash of values.
:param env: A hash of key=value items.
:type env: `dict`.
"""
for key, value in env.items():
env[key] = six.text_type(value)
else:
return env
def run(self, playbook, inventory, workdir, playbook_dir=None,
connection='smart', output_callback=None,
base_dir=constants.DEFAULT_VALIDATIONS_BASEDIR,
ssh_user=None, key=None, module_path=None,
limit_hosts=None, tags=None, skip_tags=None,
verbosity=0, quiet=False, extra_vars=None,
gathering_policy='smart',
extra_env_variables=None, parallel_run=False,
callback_whitelist=None, ansible_cfg=None,
ansible_timeout=30, ansible_artifact_path=None,
log_path=None, run_async=False, python_interpreter=None):
"""Execute one or multiple Ansible playbooks
:param playbook: The Absolute path of the Ansible playbook
:type playbook: ``string``
:param inventory: Either proper inventory file or a
comma-separated list
:type inventory: ``string``
:param workdir: The absolute path of the Ansible-runner
artifacts directory
:type workdir: ``string``
:param playbook_dir: The absolute path of the Validations playbooks
directory
:type playbook_dir: ``string``
:param connection: Connection type (local, smart, etc).
(efaults to 'smart')
:type connection: String
:param output_callback: Callback for output format. Defaults to
'yaml'.
:type output_callback: ``string``
:param base_dir: The absolute path of the default validations base
directory
:type base_dir: ``string``
:param ssh_user: User for the ssh connection (Defaults to 'root')
:type ssh_user: ``string``
:param key: Private key to use for the ssh connection.
:type key: ``string``
:param module_path: Location of the ansible module and library.
:type module_path: ``string``
:param limit_hosts: Limit the execution to the hosts.
:type limit_hosts: ``string``
:param tags: Run specific tags.
:type tags: ``string``
:param skip_tags: Skip specific tags.
:type skip_tags: ``string``
:param verbosity: Verbosity level for Ansible execution.
:type verbosity: ``integer``
:param quiet: Disable all output (Defaults to False)
:type quiet: ``boolean``
:param extra_vars: Set additional variables as a Dict or the absolute
path of a JSON or YAML file type.
:type extra_vars: Either a Dict or the absolute path of JSON or YAML
:param gathering_policy: This setting controls the default policy of
fact gathering ('smart', 'implicit', 'explicit').
(Defaults to 'smart')
:type gathering_facts: ``string``
:param extra_env_vars: Set additional ansible variables using an
extravar dictionary.
:type extra_env_vars: ``dict``
:param parallel_run: Isolate playbook execution when playbooks are
to be executed with multi-processing.
:type parallel_run: ``boolean``
:param callback_whitelist: Comma separated list of callback plugins.
Custom output_callback is also whitelisted.
(Defaults to ``None``)
:type callback_whitelist: ``list`` or ``string``
:param ansible_cfg: Path to an ansible configuration file. One will be
generated in the artifact path if this option is None.
:type ansible_cfg: ``string``
:param ansible_timeout: Timeout for ansible connections.
(Defaults to ``30 minutes``)
:type ansible_timeout: ``integer``
:param ansible_artifact_path: The Ansible artifact path
:type ansible_artifact_path: ``string``
:param log_path: The absolute path of the validations logs directory
:type log_path: ``string``
:param run_async: Enable the Ansible asynchronous mode
(Defaults to 'False')
:type run_async: ``boolean``
:param python_interpreter: Path to the Python interpreter to be
used for module execution on remote targets,
or an automatic discovery mode (``auto``,
``auto_silent`` or the default one
``auto_legacy``)
:type python_interpreter: ``string``
:return: A ``tuple`` containing the the absolute path of the executed
playbook, the return code and the status of the run
:rtype: ``tuple``
"""
if not playbook_dir:
playbook_dir = workdir
if not ansible_artifact_path:
if log_path:
ansible_artifact_path = "{}/artifacts/".format(log_path)
else:
ansible_artifact_path = \
constants.VALIDATION_ANSIBLE_ARTIFACT_PATH
playbook = self._playbook_check(playbook, playbook_dir)
self.log.debug(
'Running Ansible playbook: {},'
' Working directory: {},'
' Playbook directory: {}'.format(
playbook,
workdir,
playbook_dir
)
)
# Get env variables:
env = {}
env = os.environ.copy()
extravars = self._get_extra_vars(extra_vars)
if isinstance(callback_whitelist, list):
callback_whitelist = ','.join(callback_whitelist)
callback_whitelist, output_callback = self._callbacks(
callback_whitelist,
output_callback,
extra_env_variables,
env)
# Set ansible environment variables
env.update(self._ansible_env_var(output_callback, ssh_user, workdir,
connection, gathering_policy,
module_path, key, extra_env_variables,
ansible_timeout, callback_whitelist,
base_dir, python_interpreter))
if 'ANSIBLE_CONFIG' not in env and not ansible_cfg:
ansible_cfg = os.path.join(ansible_artifact_path, 'ansible.cfg')
config = configparser.ConfigParser()
config.add_section('defaults')
config.set('defaults', 'internal_poll_interval', '0.05')
with open(ansible_cfg, 'w') as f:
config.write(f)
env['ANSIBLE_CONFIG'] = ansible_cfg
elif 'ANSIBLE_CONFIG' not in env and ansible_cfg:
env['ANSIBLE_CONFIG'] = ansible_cfg
if log_path:
env['VALIDATIONS_LOG_DIR'] = log_path
envvars = self._encode_envvars(env=env)
r_opts = {
'private_data_dir': workdir,
'inventory': self._inventory(inventory, ansible_artifact_path),
'playbook': playbook,
'verbosity': verbosity,
'quiet': quiet,
'extravars': extravars,
'artifact_dir': workdir,
'rotate_artifacts': 256,
'ident': ''
}
if not BACKWARD_COMPAT:
r_opts.update({
'envvars': envvars,
'project_dir': playbook_dir,
'fact_cache': ansible_artifact_path,
'fact_cache_type': 'jsonfile'
})
else:
parallel_run = False
if skip_tags:
r_opts['skip_tags'] = skip_tags
if tags:
r_opts['tags'] = tags
if limit_hosts:
r_opts['limit'] = limit_hosts
if parallel_run:
r_opts['directory_isolation_base_path'] = ansible_artifact_path
runner_config = ansible_runner.runner_config.RunnerConfig(**r_opts)
runner_config.prepare()
runner_config.env['ANSIBLE_STDOUT_CALLBACK'] = \
envvars['ANSIBLE_STDOUT_CALLBACK']
if BACKWARD_COMPAT:
runner_config.env.update(envvars)
runner = ansible_runner.Runner(config=runner_config)
if run_async:
thr = threading.Thread(target=runner.run)
thr.start()
return playbook, runner.rc, runner.status
status, rc = runner.run()
return playbook, rc, status