/usr/lib/python2.7/dist-packages/muranoagent/app.py is in murano-agent 1:3.4.0-0ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 | # Copyright (c) 2013 Mirantis 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 os
import sys
import time
from oslo_log import log as logging
from oslo_service import service
from oslo_utils import strutils
from muranoagent.common import config
from muranoagent.common import messaging
from muranoagent import execution_plan_queue
from muranoagent import execution_plan_runner
from muranoagent import execution_result as ex_result
from muranoagent import validation
CONF = config.CONF
LOG = logging.getLogger(__name__)
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.warning('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(
strutils.mask_password(str(plan))))
if self._verify_plan(plan):
self._run(plan)
return
next(msg_iterator)
def _verify_plan(self, plan):
try:
validation.validate_plan(plan)
return True
except Exception as err:
try:
execution_result = ex_result.ExecutionResult.from_error(
err, plan)
if 'ReplyTo' in plan and CONF.enable_dynamic_result_queue:
execution_result['ReplyTo'] = plan.ReplyTo
self._send_result(execution_result)
except ValueError:
LOG.warning('Execution result is not produced')
finally:
return False
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,
'ssl_version': rabbitmq.ssl_version,
'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:
try:
self._queue.put_execution_plan(
msg.body,
msg.signature,
msg.id,
msg.reply_to)
finally:
msg.ack()
delay = 5
if msg is not None:
yield
except KeyboardInterrupt:
break
except Exception:
LOG.warning('Communication error', exc_info=True)
time.sleep(delay)
delay = min(delay * 1.2, 60)
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