Upload the contribution of vstf as bottleneck network framework.

[bottlenecks.git] / vstf / vstf / agent / agent.py

diff --git a/vstf/vstf/agent/agent.py b/vstf/vstf/agent/agent.py
new file mode 100755 (executable)
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+++ b/vstf/vstf/agent/agent.py
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+#!/usr/bin/env python
+# coding=utf-8
+import logging
+import argparse
+import signal
+
+from oslo.config import cfg
+
+from vstf.rpc_frame_work import rpc_consumer
+from vstf.common.log import setup_logging
+from vstf.common import daemon
+from vstf.common.cfgparser import CfgParser
+
+LOG = logging.getLogger(__name__)
+
+server_opts = [
+    cfg.StrOpt('user', default='guest', help="the rabbit's user, default guest"),
+    cfg.StrOpt('passwd', default='guest', help="the rabbit's passwd, default guest"),
+    cfg.StrOpt('host', default='localhost', help="tell the process wich interface to listen"),
+    cfg.StrOpt('port', default=5672, help=""),
+    cfg.StrOpt('id', default='agent', help="")
+
+]
+
+stc_opts = [
+    cfg.StrOpt('package', default='', help="the STC python path")
+]
+
+
+class Client(daemon.Daemon):
+    """This is a consumer of vstf-agent which will create two channel to the
+    rabbitmq-server, one for direct call, one for fan call.
+    
+    agent start with a config file which record rabbitmq's ip, port and user passwd
+    also each agent has its own id.
+    
+    """
+
+    def __init__(self, agent, config_file):
+        """Record the config file, init the daemon.
+        
+        :param str config_file: the config of a VSTF agent.
+        
+        """
+        super(Client, self).__init__('/tmp/esp_rpc_client.pid')
+        self.config_file = config_file
+        self.agent = agent
+        self.config = None
+        self.proxy = None
+        self.run_flag = True
+
+    def init_config(self):
+        """Use olso.config to analyse the config file
+        
+        """
+        parser = CfgParser(self.config_file)
+        parser.register_my_opts(server_opts, "rabbit")
+        parser.register_my_opts(stc_opts, "spirent")
+        self.config = parser.parse()
+
+    def loop_thread(self):
+        LOG.info("Try to create direct proxy...")
+        self.proxy = rpc_consumer.VstfConsumer(self.agent,
+                                                self.config.rabbit.user,
+                                                self.config.rabbit.passwd,
+                                                self.config.rabbit.host,
+                                                self.config.rabbit.port,
+                                                self.config.rabbit.id)
+        self.proxy.run()
+
+    def run(self):
+        """Run the rabbitmq consumers as a daemon.
+        
+        """
+        signal.signal(signal.SIGTERM, self.process_exit)
+        self.loop_thread()
+        LOG.info("agent start ok!")
+
+    def process_exit(self, signum, frame):
+        """This function try to stop the agent after running agent stop.
+        When we call vstf-agent stop which will send a signal SIGTERM to agent
+        When the agent catch the SIGTERM signal will call this function.
+        
+        """
+        LOG.info("daemon catch the signalterm, start to stop the process.")
+        self.run_flag = False
+        if self.proxy:
+            self.proxy.stop()
+
+    def start_agent(self):
+        self.init_config()
+        self.start()
+
+    def stop_agent(self):
+        """Notice that: this function just kill the agent by pid file, it has
+        none vars of the agent.
+        
+        """
+        LOG.info("call daemon stop.")
+        # kill the main thread
+        self.stop()
+
+
+def main():
+    setup_logging(level=logging.INFO, log_file="/var/log/vstf/vstf-agent.log")
+    parser = argparse.ArgumentParser(description='agent option')
+    parser.add_argument('action', choices=('start', 'stop', "restart"),
+                        default="start", help="start or stop agent")
+    parser.add_argument('--agent_type', action='store',
+                        default="soft",
+                        choices=["soft", "spirent"],
+                        help="the agent type, as now, just soft and spirent")
+    parser.add_argument('--config_file', action='store',
+                        default="/etc/vstf/amqp/amqp.ini",
+                        help="some env_build params recorded in the config file")
+
+    args = parser.parse_args()
+
+    client = Client(args.agent_type, args.config_file)
+    if "start" == args.action:
+        client.start_agent()
+    elif "stop" == args.action:
+        client.stop_agent()
+    elif "restart" == args.action:
+        client.stop_agent()
+        client.start_agent()
+    else:
+        raise Exception("only support actions: start/stop/restart")
+
+
+if __name__ == '__main__':
+    main()