def main(): ''' Description: This script will be used on EC2 for configuring the running instance based on Cloud Engine configuration supplied at launch time in the user data. Config Server Status: 200 HTTP OK - Success and no more data of this type 202 HTTP Accepted - Success and more data of this type 404 HTTP Not Found - This may be temporary so try again ''' # parse the args and setup logging conf = parse_args() log_file = {} if 'pwd' in conf and conf.pwd: log_file = {'logfile_name': 'audrey.log'} logger = setup_logging(level=conf.log_level, **log_file) if not conf.endpoint: # discover the cloud I'm on # update the conf with the user data #conf = dict(vars(conf).items() + user_data.discover().read().items()) vars(conf).update(user_data.discover().read().items()) # ensure the conf is a dictionary, not a namespace if hasattr(conf, '__dict__'): conf = vars(conf) logger.info('Invoked audrey main') # Create the Client Object and test connectivity # to CS by negotiating the api version client = CSClient(**conf) client.test_connection() # Get the agent object agent = AudreyFactory(client.api_version).agent # run the agent agent(conf).run()
class AgentV1(object): ''' contains the main logic for processing This object is compatible with API Version 1 ''' def __init__(self, conf): ''' conf: argparse dict ''' tool_dir = {} if 'pwd' in conf and conf['pwd']: tool_dir = {'tool_dir': PWD_TOOLING} # Create the Client Object self.client = CSClient(**conf) self.client.test_connection() # Get any optional tooling from the Config Server tooling_status, tarball = self.client.get_tooling() if tooling_status != 200: LOGGER.error('Get Tooling returned: %s' % tooling_status) raise AAErrorGetTooling('Get Tooling returned: %s' % tooling_status) self.tooling = Tooling(tarball, **tool_dir) def run(self): ''' Main agent loop, called by main() in /usr/bin/audrey ''' # 0 means don't run again # -1 is non zero so initial runs will happen config_status = -1 provides_status = -1 max_retry = MAX_RETRY loop_count = 60 services = [] # Process the Requires and Provides parameters until the HTTP status # from the get_configs and the get_params both return 200 while config_status or provides_status: LOGGER.debug('Config Parameter status: ' + str(config_status)) LOGGER.debug('Return Parameter status: ' + str(provides_status)) # Get the Required Configs from the Config Server if config_status: config_status, configs = self.client.get_configs() # Configure the system with the provided Required Configs if config_status == 200: services = Service.parse_require_config(configs, self.tooling) self.tooling.invoke_tooling(services) # don't do any more config status work # now that the tooling has run config_status = 0 else: LOGGER.info( 'No configuration parameters provided. status: ' + \ str(config_status)) # Get the requested provides from the Config Server if provides_status: get_status = self.client.get_provides()[0] # Gather the values from the system for the requested provides if get_status == 200: params_values = Provides().generate_cs_str() else: params_values = '|&|' # Put the requested provides with values to the Config Server provides_status = self.client.put_provides(params_values)[0] if provides_status == 200: # don't operate on params anymore, all have been provided. provides_status = 0 # Retry a number of times if 404 HTTP Not Found is returned. if config_status == 404 or provides_status == 404: LOGGER.error('404 from Config Server.') LOGGER.error('Required Config status: %s' % config_status) LOGGER.info('Return Parameter status: %s' % provides_status) max_retry -= 1 if max_retry < 0: raise AAError('Too many 404 Config Server responses.') if loop_count: loop_count-=1 sleep(SLEEP_SECS) else: break
class AgentV1(object): ''' contains the main logic for processing This object is compatible with API Version 1 ''' def __init__(self, conf): ''' conf: argparse dict ''' tool_dir = {} if 'pwd' in conf and conf['pwd']: tool_dir = {'tool_dir': PWD_TOOLING} # Create the Client Object self.client = CSClient(**conf) self.client.test_connection() # Get any optional tooling from the Config Server tooling_status, tarball = self.client.get_tooling() if tooling_status != 200: LOGGER.error('Get Tooling returned: %s' % tooling_status) raise AAErrorGetTooling('Get Tooling returned: %s' % tooling_status) self.tooling = Tooling(tarball, **tool_dir) def run(self): ''' Main agent loop, called by main() in /usr/bin/audrey ''' # 0 means don't run again # -1 is non zero so initial runs will happen config_status = -1 provides_status = -1 max_retry = MAX_RETRY loop_count = 60 services = [] # Process the Requires and Provides parameters until the HTTP status # from the get_configs and the get_params both return 200 while config_status or provides_status: LOGGER.debug('Config Parameter status: ' + str(config_status)) LOGGER.debug('Return Parameter status: ' + str(provides_status)) # Get the Required Configs from the Config Server if config_status: config_status, configs = self.client.get_configs() # Configure the system with the provided Required Configs if config_status == 200: services = Service.parse_require_config( configs, self.tooling) self.tooling.invoke_tooling(services) # don't do any more config status work # now that the tooling has run config_status = 0 else: LOGGER.info( 'No configuration parameters provided. status: ' + \ str(config_status)) # Get the requested provides from the Config Server if provides_status: get_status = self.client.get_provides()[0] # Gather the values from the system for the requested provides if get_status == 200: params_values = Provides().generate_cs_str() else: params_values = '|&|' # Put the requested provides with values to the Config Server provides_status = self.client.put_provides(params_values)[0] if provides_status == 200: # don't operate on params anymore, all have been provided. provides_status = 0 # Retry a number of times if 404 HTTP Not Found is returned. if config_status == 404 or provides_status == 404: LOGGER.error('404 from Config Server.') LOGGER.error('Required Config status: %s' % config_status) LOGGER.info('Return Parameter status: %s' % provides_status) max_retry -= 1 if max_retry < 0: raise AAError('Too many 404 Config Server responses.') if loop_count: loop_count -= 1 sleep(SLEEP_SECS) else: break