Illyoung Choi | fe121d0 | 2019-07-16 10:47:41 -0700 | [diff] [blame^] | 1 | #!/usr/bin/env python3 |
| 2 | |
| 3 | # Copyright 2019-present Open Networking Foundation |
| 4 | # |
| 5 | # Licensed under the Apache License, Version 2.0 (the "License"); |
| 6 | # you may not use this file except in compliance with the License. |
| 7 | # You may obtain a copy of the License at |
| 8 | # |
| 9 | # http://www.apache.org/licenses/LICENSE-2.0 |
| 10 | # |
| 11 | # Unless required by applicable law or agreed to in writing, software |
| 12 | # distributed under the License is distributed on an "AS IS" BASIS, |
| 13 | # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 14 | # See the License for the specific language governing permissions and |
| 15 | # limitations under the License. |
| 16 | |
| 17 | """ |
| 18 | Workflow Kickstarter |
| 19 | |
| 20 | This module kickstarts Airflow workflows for requests from Workflow Controller |
| 21 | """ |
| 22 | |
| 23 | import json |
| 24 | import os.path |
| 25 | import argparse |
| 26 | import pyfiglet |
| 27 | import traceback |
| 28 | import socket |
| 29 | import time |
| 30 | |
| 31 | from multistructlog import create_logger |
| 32 | from cord_workflow_controller_client.manager import Manager |
| 33 | from airflow.api.client.json_client import Client as AirflowClient |
| 34 | from requests.auth import HTTPBasicAuth |
| 35 | from urlparse import urlparse |
| 36 | |
| 37 | |
| 38 | log = create_logger() |
| 39 | manager = None |
| 40 | airflow_client = None |
| 41 | |
| 42 | progargs = { |
| 43 | 'controller_url': 'http://localhost:3030', |
| 44 | 'airflow_url': 'http://localhost:8080', |
| 45 | 'airflow_username': '', |
| 46 | 'airflow_password': '', |
| 47 | 'logging': None |
| 48 | } |
| 49 | |
| 50 | DEFAULT_CONFIG_FILE_PATH = '/etc/cord_workflow_airflow_extensions/config.json' |
| 51 | SOCKET_CONNECTION_TEST_TIMEOUT = 5 |
| 52 | DEFAULT_CONNECTION_TEST_DELAY = 5 |
| 53 | DEFAULT_CONNECTION_TEST_RETRY = 999999 |
| 54 | |
| 55 | |
| 56 | def print_graffiti(): |
| 57 | result = pyfiglet.figlet_format("CORD\nWorkflow\nKickstarter", font="graffiti") |
| 58 | print(result) |
| 59 | |
| 60 | |
| 61 | def get_arg_parser(): |
| 62 | parser = argparse.ArgumentParser(description='CORD Workflow Kickstarter Daemon.', prog='kickstarter') |
| 63 | parser.add_argument('--config', help='locate a configuration file') |
| 64 | parser.add_argument('--controller', help='CORD Workflow Controller URL') |
| 65 | parser.add_argument('--airflow', help='Airflow REST URL') |
| 66 | parser.add_argument('--airflow_user', help='User Name to access Airflow Web Interface') |
| 67 | parser.add_argument('--airflow_passwd', help='Password to access Airlfow Web Interface') |
| 68 | return parser |
| 69 | |
| 70 | |
| 71 | def read_config(path): |
| 72 | if os.path.exists(path): |
| 73 | with open(path) as json_config_file: |
| 74 | data = json.load(json_config_file) |
| 75 | return data |
| 76 | return {} |
| 77 | |
| 78 | |
| 79 | def pretty_format_json(j): |
| 80 | dumps = json.dumps(j, sort_keys=True, indent=4, separators=(',', ': ')) |
| 81 | return dumps |
| 82 | |
| 83 | |
| 84 | def is_port_open(url, timeout): |
| 85 | o = urlparse(url) |
| 86 | hostname = o.hostname |
| 87 | port = o.port |
| 88 | |
| 89 | if (not port) or port <= 0: |
| 90 | if o.scheme.lower() == 'http': |
| 91 | port = 80 |
| 92 | elif o.scheme.lower() == 'https': |
| 93 | port = 443 |
| 94 | |
| 95 | succeed = False |
| 96 | sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) |
| 97 | sock.settimeout(timeout) |
| 98 | try: |
| 99 | sock.connect((hostname, int(port))) |
| 100 | sock.shutdown(socket.SHUT_RDWR) |
| 101 | succeed = True |
| 102 | except BaseException: |
| 103 | pass |
| 104 | finally: |
| 105 | sock.close() |
| 106 | |
| 107 | return succeed |
| 108 | |
| 109 | |
| 110 | def check_web_live(url, |
| 111 | retry=DEFAULT_CONNECTION_TEST_RETRY, |
| 112 | delay=DEFAULT_CONNECTION_TEST_DELAY, |
| 113 | timeout=SOCKET_CONNECTION_TEST_TIMEOUT): |
| 114 | ipup = False |
| 115 | for _ in range(retry): |
| 116 | if is_port_open(url, timeout): |
| 117 | ipup = True |
| 118 | break |
| 119 | else: |
| 120 | time.sleep(delay) |
| 121 | return ipup |
| 122 | |
| 123 | |
| 124 | def on_kickstart(workflow_id, workflow_run_id): |
| 125 | if manager and airflow_client: |
| 126 | try: |
| 127 | log.info('> Kickstarting a workflow (%s) => workflow run (%s)' % (workflow_id, workflow_run_id)) |
| 128 | |
| 129 | airflow_client.trigger_dag(dag_id=workflow_id, run_id=workflow_run_id) |
| 130 | |
| 131 | # let controller know that the new workflow run is created |
| 132 | log.info('> Notifying a workflow (%s), a workflow run (%s)' % (workflow_id, workflow_run_id)) |
| 133 | manager.notify_new_workflow_run(workflow_id, workflow_run_id) |
| 134 | |
| 135 | log.info('> OK') |
| 136 | except Exception as e: |
| 137 | log.error('> Error : %s' % e) |
| 138 | log.debug(traceback.format_exc()) |
| 139 | |
| 140 | |
| 141 | # for command-line execution |
| 142 | def main(args): |
| 143 | print_graffiti() |
| 144 | |
| 145 | # check if config path is set |
| 146 | config_file_path = DEFAULT_CONFIG_FILE_PATH |
| 147 | if args.config: |
| 148 | config_file_path = args.config |
| 149 | |
| 150 | if os.path.exists(config_file_path): |
| 151 | # read config |
| 152 | config = read_config(config_file_path) |
| 153 | if config: |
| 154 | global progargs |
| 155 | for k in progargs: |
| 156 | # overwrite |
| 157 | progargs[k] = config[k] |
| 158 | |
| 159 | global log |
| 160 | log = create_logger(progargs["logging"]) |
| 161 | |
| 162 | if args.airflow: |
| 163 | progargs['airflow_url'] = args.airflow |
| 164 | |
| 165 | if args.controller: |
| 166 | progargs['controller_url'] = args.controller |
| 167 | |
| 168 | if args.airflow_user: |
| 169 | progargs['airflow_user'] = args.airflow_user |
| 170 | |
| 171 | if args.airflow_passwd: |
| 172 | progargs['airflow_passwd'] = args.airflow_passwd |
| 173 | |
| 174 | print('=CONFIG=') |
| 175 | config_json_string = pretty_format_json(progargs) |
| 176 | print(config_json_string) |
| 177 | print('\n') |
| 178 | |
| 179 | # checking controller and airflow web interface |
| 180 | log.info('Checking if Workflow Controller (%s) is live...' % progargs['controller_url']) |
| 181 | controller_live = check_web_live(progargs['controller_url']) |
| 182 | if not controller_live: |
| 183 | log.error('Controller (%s) appears to be down' % progargs['controller_url']) |
| 184 | raise 'Controller (%s) appears to be down' % progargs['controller_url'] |
| 185 | |
| 186 | log.info('Checking if Airflow (%s) is live...' % progargs['airflow_url']) |
| 187 | airflow_live = check_web_live(progargs['airflow_url']) |
| 188 | if not airflow_live: |
| 189 | log.error('Airflow (%s) appears to be down' % progargs['airflow_url']) |
| 190 | raise 'Airflow (%s) appears to be down' % progargs['airflow_url'] |
| 191 | |
| 192 | # connect to workflow controller |
| 193 | log.info('Connecting to Workflow Controller (%s)...' % progargs['controller_url']) |
| 194 | global manager |
| 195 | manager = Manager(logger=log) |
| 196 | manager.connect(progargs['controller_url']) |
| 197 | manager.set_handlers({'kickstart': on_kickstart}) |
| 198 | |
| 199 | # connect to airflow |
| 200 | global airflow_client |
| 201 | log.info('Connecting to Airflow (%s)...' % progargs['airflow_url']) |
| 202 | http_auth = None |
| 203 | if progargs['airflow_user'] and progargs['airflow_passwd']: |
| 204 | log.info('Using a username %s' % progargs['airflow_user']) |
| 205 | http_auth = HTTPBasicAuth(progargs['airflow_user'], progargs['airflow_passwd']) |
| 206 | |
| 207 | airflow_client = AirflowClient(progargs['airflow_url'], auth=http_auth) |
| 208 | |
| 209 | log.info('Waiting for kickstart events from Workflow Controller...') |
| 210 | try: |
| 211 | manager.wait() |
| 212 | finally: |
| 213 | log.info('Terminating the program...') |
| 214 | manager.disconnect() |
| 215 | |
| 216 | |
| 217 | if __name__ == "__main__": |
| 218 | parser = get_arg_parser() |
| 219 | args = parser.parse_args() |
| 220 | main(args) |