# Launch Controller communication
run_threads(server_hostname, heartbeat_stop_callback)
#
# If Ambari Agent connected to the server or
# Ambari Agent was stopped using stop event
# Clean up if not Windows OS
#
if connected or stopped:
ExitHelper().exit(0)
logger.info("finished")
break
pass # for server_hostname in server_hostnames
pass # while not (connected or stopped)
return active_server
if __name__ == "__main__":
is_logger_setup = False
try:
heartbeat_stop_callback = bind_signal_handlers(agentPid)
main(heartbeat_stop_callback)
except SystemExit:
raise
except BaseException:
if is_logger_setup:
logger.exception("Exiting with exception:")
raise
# Launch Controller communication
run_threads(initializer_module)
#
# If Ambari Agent connected to the server or
# Ambari Agent was stopped using stop event
# Clean up if not Windows OS
#
if connected or stopped:
ExitHelper().exit()
logger.info("finished")
break
pass # for server_hostname in server_hostnames
pass # while not (connected or stopped)
return active_server
if __name__ == "__main__":
is_logger_setup = False
try:
initializer_module = InitializerModule()
heartbeat_stop_callback = bind_signal_handlers(agentPid, initializer_module.stop_event)
main(initializer_module, heartbeat_stop_callback)
except SystemExit:
raise
except BaseException:
if is_logger_setup:
logger.exception("Exiting with exception:")
raise
def main(heartbeat_stop_callback=None):
global config
parser = OptionParser()
parser.add_option("-v", "--verbose", dest="verbose", action="store_true", help="verbose log output", default=False)
parser.add_option("-e", "--expected-hostname", dest="expected_hostname", action="store",
help="expected hostname of current host. If hostname differs, agent will fail", default=None)
(options, args) = parser.parse_args()
expected_hostname = options.expected_hostname
current_user = getpass.getuser()
setup_logging(options.verbose)
default_cfg = {'agent': {'prefix': '/home/ambari'}}
config.load(default_cfg)
bind_signal_handlers(agentPid)
if (len(sys.argv) > 1) and sys.argv[1] == 'stop':
stop_agent()
if (len(sys.argv) > 2) and sys.argv[1] == 'reset':
reset_agent(sys.argv)
# Check for ambari configuration file.
resolve_ambari_config()
# Starting data cleanup daemon
data_cleaner = None
if config.has_option('agent', 'data_cleanup_interval') and int(config.get('agent','data_cleanup_interval')) > 0:
data_cleaner = DataCleaner(config)
data_cleaner.start()
perform_prestart_checks(expected_hostname)
# Starting ping port listener
try:
#This acts as a single process machine-wide lock (albeit incomplete, since
# we still need an extra file to track the Agent PID)
ping_port_listener = PingPortListener(config)
except Exception as ex:
err_message = "Failed to start ping port listener of: " + str(ex)
logger.error(err_message)
sys.stderr.write(err_message)
sys.exit(1)
ping_port_listener.start()
update_log_level(config)
server_hostname = config.get('server', 'hostname')
server_url = config.get_api_url()
if not OSCheck.get_os_family() == OSConst.WINSRV_FAMILY:
daemonize()
try:
server_ip = socket.gethostbyname(server_hostname)
logger.info('Connecting to Ambari server at %s (%s)', server_url, server_ip)
except socket.error:
logger.warn("Unable to determine the IP address of the Ambari server '%s'", server_hostname)
# Wait until server is reachable
netutil = NetUtil(heartbeat_stop_callback)
retries, connected = netutil.try_to_connect(server_url, -1, logger)
# Ambari Agent was stopped using stop event
if connected:
# Launch Controller communication
controller = Controller(config, heartbeat_stop_callback)
controller.start()
controller.join()
if not OSCheck.get_os_family() == OSConst.WINSRV_FAMILY:
stop_agent()
logger.info("finished")
def main(heartbeat_stop_callback=None):
global config
parser = OptionParser()
parser.add_option("-v",
"--verbose",
dest="verbose",
action="store_true",
help="verbose log output",
default=False)
parser.add_option(
"-e",
"--expected-hostname",
dest="expected_hostname",
action="store",
help=
"expected hostname of current host. If hostname differs, agent will fail",
default=None)
(options, args) = parser.parse_args()
expected_hostname = options.expected_hostname
current_user = getpass.getuser()
setup_logging(options.verbose)
default_cfg = {'agent': {'prefix': '/home/ambari'}}
config.load(default_cfg)
bind_signal_handlers(agentPid)
if (len(sys.argv) > 1) and sys.argv[1] == 'stop':
stop_agent()
if (len(sys.argv) > 2) and sys.argv[1] == 'reset':
reset_agent(sys.argv)
# Check for ambari configuration file.
resolve_ambari_config()
# Starting data cleanup daemon
data_cleaner = None
if config.has_option('agent', 'data_cleanup_interval') and int(
config.get('agent', 'data_cleanup_interval')) > 0:
data_cleaner = DataCleaner(config)
data_cleaner.start()
perform_prestart_checks(expected_hostname)
if not OSCheck.get_os_family() == OSConst.WINSRV_FAMILY:
daemonize()
# Starting ping port listener
try:
ping_port_listener = PingPortListener(config)
except Exception as ex:
err_message = "Failed to start ping port listener of: " + str(ex)
logger.error(err_message)
sys.stderr.write(err_message)
sys.exit(1)
ping_port_listener.start()
update_log_level(config)
server_hostname = config.get('server', 'hostname')
server_url = config.get_api_url()
try:
server_ip = socket.gethostbyname(server_hostname)
logger.info('Connecting to Ambari server at %s (%s)', server_url,
server_ip)
except socket.error:
logger.warn(
"Unable to determine the IP address of the Ambari server '%s'",
server_hostname)
# Wait until server is reachable
netutil = NetUtil(heartbeat_stop_callback)
retries, connected = netutil.try_to_connect(server_url, -1, logger)
# Ambari Agent was stopped using stop event
if connected:
# Launch Controller communication
controller = Controller(config, heartbeat_stop_callback)
controller.start()
controller.join()
if not OSCheck.get_os_family() == OSConst.WINSRV_FAMILY:
stop_agent()
logger.info("finished")
server_hostname = config.get('server', 'hostname')
server_url = config.get_api_url()
if not OSCheck.get_os_family() == OSConst.WINSRV_FAMILY:
daemonize()
try:
server_ip = socket.gethostbyname(server_hostname)
logger.info('Connecting to Ambari server at %s (%s)', server_url, server_ip)
except socket.error:
logger.warn("Unable to determine the IP address of the Ambari server '%s'", server_hostname)
# Wait until server is reachable
netutil = NetUtil(heartbeat_stop_callback)
retries, connected = netutil.try_to_connect(server_url, -1, logger)
# Ambari Agent was stopped using stop event
if connected:
# Launch Controller communication
controller = Controller(config, heartbeat_stop_callback)
controller.start()
controller.join()
if not OSCheck.get_os_family() == OSConst.WINSRV_FAMILY:
stop_agent()
logger.info("finished")
if __name__ == "__main__":
heartbeat_stop_callback = bind_signal_handlers(agentPid)
main(heartbeat_stop_callback)