/usr/lib/python2.7/dist-packages/muranoagent/app.py is in murano-agent 1:3.0.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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#
# 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 os
import sys
import time
from oslo_log import log as logging
from oslo_service import service
import semantic_version
import six
from muranoagent import bunch
from muranoagent.common import config
from muranoagent.common import messaging
from muranoagent import exceptions as exc
from muranoagent import execution_plan_queue
from muranoagent import execution_plan_runner
from muranoagent import execution_result as ex_result
CONF = config.CONF
LOG = logging.getLogger(__name__)
max_format_version = semantic_version.Spec('<=2.2.0')
class MuranoAgent(service.Service):
def __init__(self):
self._queue = execution_plan_queue.ExecutionPlanQueue()
super(MuranoAgent, self).__init__()
@staticmethod
def _load_package(name):
try:
LOG.debug('Loading plugin %s', name)
__import__(name)
except Exception:
LOG.warn('Cannot load package %s', name, exc_info=True)
pass
def _load(self):
path = os.path.join(os.path.dirname(__file__), 'executors')
sys.path.insert(1, path)
for entry in os.listdir(path):
package_path = os.path.join(path, entry)
if os.path.isdir(package_path):
MuranoAgent._load_package(entry)
def start(self):
self._load()
msg_iterator = self._wait_plan()
while True:
try:
self._loop_func(msg_iterator)
except Exception as ex:
LOG.exception(ex)
time.sleep(5)
def _loop_func(self, msg_iterator):
result, timestamp = self._queue.get_execution_plan_result()
if result is not None:
if self._send_result(result):
self._queue.remove(timestamp)
return
plan = self._queue.get_execution_plan()
if plan is not None:
LOG.debug("Got an execution plan '{0}':".format(str(plan)))
self._run(plan)
return
next(msg_iterator)
def _run(self, plan):
try:
with execution_plan_runner.ExecutionPlanRunner(plan) as runner:
result = runner.run()
execution_result = ex_result.ExecutionResult.from_result(
result, plan)
self._queue.put_execution_result(execution_result, plan)
except Exception as ex:
LOG.exception('Error running execution plan')
execution_result = ex_result.ExecutionResult.from_error(ex,
plan)
self._queue.put_execution_result(execution_result, plan)
def _send_result(self, result):
with self._create_rmq_client() as mq:
msg = messaging.Message()
msg.body = result
msg.id = result.get('SourceID')
routing_key = CONF.rabbitmq.result_routing_key
if ('ReplyTo' in result) and CONF.enable_dynamic_result_queue:
routing_key = result.pop('ReplyTo')
mq.send(message=msg,
key=routing_key,
exchange=CONF.rabbitmq.result_exchange)
return True
def _create_rmq_client(self):
rabbitmq = CONF.rabbitmq
connection_params = {
'login': rabbitmq.login,
'password': rabbitmq.password,
'host': rabbitmq.host,
'port': rabbitmq.port,
'virtual_host': rabbitmq.virtual_host,
'ssl': rabbitmq.ssl,
'ca_certs': rabbitmq.ca_certs.strip() or None,
'insecure': rabbitmq.insecure
}
return messaging.MqClient(**connection_params)
def _wait_plan(self):
delay = 5
while True:
try:
with self._create_rmq_client() as mq:
with mq.open(CONF.rabbitmq.input_queue,
prefetch_count=1) as subscription:
while True:
msg = subscription.get_message(timeout=5)
if msg is not None and isinstance(msg.body, dict):
self._handle_message(msg)
delay = 5
if msg is not None:
msg.ack()
yield
except KeyboardInterrupt:
break
except Exception:
LOG.warn('Communication error', exc_info=True)
time.sleep(delay)
delay = min(delay * 1.2, 60)
def _handle_message(self, msg):
if 'ID' not in msg.body and msg.id:
msg.body['ID'] = msg.id
if 'ReplyTo' not in msg.body and msg.reply_to:
msg.body['ReplyTo'] = msg.reply_to
try:
self._verify_plan(msg.body)
self._queue.put_execution_plan(msg.body)
except Exception as err:
try:
execution_result = ex_result.ExecutionResult.from_error(
err, bunch.Bunch(msg.body))
if ('ReplyTo' in msg.body) and \
CONF.enable_dynamic_result_queue:
execution_result['ReplyTo'] = msg.body.get('ReplyTo')
self._send_result(execution_result)
except ValueError:
LOG.warn('Execution result is not produced')
def _verify_plan(self, plan):
plan_format_version = semantic_version.Version(
plan.get('FormatVersion', '1.0.0'))
if plan_format_version not in max_format_version:
# NOTE(kazitsev) this is Version in Spec not str in str
raise exc.IncorrectFormat(
9,
"Unsupported format version {0} "
"(I support versions {1})".format(
plan_format_version, max_format_version))
for attr in ('Scripts', 'Files'):
if attr not in plan:
raise exc.IncorrectFormat(
2, '{0} is not in the execution plan'.format(attr))
for attr in ('Scripts', 'Files', 'Options'):
if attr in plan and not isinstance(
plan[attr], dict):
raise exc.IncorrectFormat(
2, '{0} is not a dictionary'.format(attr))
for name, script in plan.get('Scripts', {}).items():
self._validate_script(name, script, plan_format_version, plan)
for key, plan_file in plan.get('Files', {}).items():
self._validate_file(plan_file, key, plan_format_version)
def _validate_script(self, name, script, plan_format_version, plan):
for attr in ('Type', 'EntryPoint'):
if attr not in script or not isinstance(script[attr],
six.string_types):
raise exc.IncorrectFormat(
2, 'Incorrect {0} entry in script {1}'.format(
attr, name))
if plan_format_version in semantic_version.Spec('>=2.0.0,<2.1.0'):
if script['Type'] != 'Application':
raise exc.IncorrectFormat(
2, 'Type {0} is not valid for format {1}'.format(
script['Type'], plan_format_version))
if script['EntryPoint'] not in plan.get('Files', {}):
raise exc.IncorrectFormat(
2, 'Script {0} misses entry point {1}'.format(
name, script['EntryPoint']))
if plan_format_version in semantic_version.Spec('>=2.1.0'):
if script['Type'] not in ('Application', 'Chef', 'Puppet'):
raise exc.IncorrectFormat(
2, 'Script has not a valid type {0}'.format(
script['Type']))
if (script['Type'] == 'Application' and script['EntryPoint']
not in plan.get('Files', {})):
raise exc.IncorrectFormat(
2, 'Script {0} misses entry point {1}'.format(
name, script['EntryPoint']))
elif (script['Type'] != 'Application' and
"::" not in script['EntryPoint']):
raise exc.IncorrectFormat(
2, 'Wrong EntryPoint {0} for Puppet/Chef '
'executors. :: needed'.format(script['EntryPoint']))
for option in script['Options']:
if option in ('useBerkshelf', 'berksfilePath'):
if plan_format_version in semantic_version.Spec('<2.2.0'):
raise exc.IncorrectFormat(
2, 'Script has an option {0} invalid '
'for version {1}'.format(option,
plan_format_version))
elif script['Type'] != 'Chef':
raise exc.IncorrectFormat(
2, 'Script has an option {0} invalid '
'for type {1}'.format(option, script['Type']))
for additional_file in script.get('Files', []):
mns_error = ('Script {0} misses file {1}'.
format(name, additional_file))
if isinstance(additional_file, dict):
if (list(additional_file.keys())[0] not in
plan.get('Files', {}).keys()):
raise exc.IncorrectFormat(2, mns_error)
elif additional_file not in plan.get('Files', {}):
raise exc.IncorrectFormat(2, mns_error)
def _validate_file(self, plan_file, key, format_version):
if format_version in semantic_version.Spec('>=2.0.0,<2.1.0'):
for plan in plan_file.keys():
if plan in ('Type', 'URL'):
raise exc.IncorrectFormat(
2, 'Download file is {0} not valid for this '
'version {1}'.format(key, format_version))
if 'Type' in plan_file:
for attr in ('Type', 'URL', 'Name'):
if attr not in plan_file:
raise exc.IncorrectFormat(
2,
'Incorrect {0} entry in file {1}'.format(attr, key))
elif 'Body' in plan_file:
for attr in ('BodyType', 'Body', 'Name'):
if attr not in plan_file:
raise exc.IncorrectFormat(
2, 'Incorrect {0} entry in file {1}'.format(
attr, key))
if plan_file['BodyType'] not in ('Text', 'Base64'):
raise exc.IncorrectFormat(
2, 'Incorrect BodyType in file {1}'.format(key))
else:
raise exc.IncorrectFormat(
2, 'Invalid file {0}: {1}'.format(
key, plan_file))
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