Revision cdd7f900 daemons/ganeti-masterd
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# C0103: Invalid name ganeti-masterd |
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import sys |
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import socket |
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import SocketServer |
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import time |
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import collections |
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import signal |
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import logging |
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from optparse import OptionParser |
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def RunTask(self, server, request, client_address): |
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"""Process the request. |
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This is copied from the code in ThreadingMixIn. |
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""" |
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try: |
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server.finish_request(request, client_address) |
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server.close_request(request) |
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except: # pylint: disable-msg=W0702 |
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server.handle_error(request, client_address) |
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server.close_request(request) |
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server.request_handler_class(request, client_address, server) |
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finally: |
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request.close() |
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class IOServer(SocketServer.UnixStreamServer):
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"""IO thread class.
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class MasterServer(daemon.AsyncStreamServer):
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"""Master Server.
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This class takes care of initializing the other threads, setting |
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signal handlers (which are processed only in this thread), and doing |
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cleanup at shutdown. |
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This is the main asynchronous master server. It handles connections to the |
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master socket. |
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""" |
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def __init__(self, address, rqhandler):
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"""IOServer constructor
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def __init__(self, mainloop, address, handler_class):
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"""MasterServer constructor
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@param address: the address to bind this IOServer to |
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@param rqhandler: RequestHandler type object |
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@type mainloop: ganeti.daemon.Mainloop |
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@param mainloop: Mainloop used to poll for I/O events |
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@param address: the unix socket address to bind the MasterServer to |
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@param handler_class: handler class for the connections |
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""" |
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SocketServer.UnixStreamServer.__init__(self, address, rqhandler) |
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daemon.AsyncStreamServer.__init__(self, socket.AF_UNIX, address) |
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self.request_handler_class = handler_class |
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self.mainloop = mainloop |
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# We'll only start threads once we've forked. |
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self.context = None |
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self.request_workers = None |
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def handle_connection(self, connected_socket, client_address): |
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self.request_workers.AddTask(self, connected_socket, client_address) |
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def setup_queue(self): |
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self.context = GanetiContext() |
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self.request_workers = workerpool.WorkerPool("ClientReq",
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CLIENT_REQUEST_WORKERS, |
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ClientRequestWorker) |
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def process_request(self, request, client_address): |
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"""Add task to workerpool to process request. |
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""" |
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(pid, uid, gid) = utils.GetSocketCredentials(request) |
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logging.info("Accepted connection from pid=%s, uid=%s, gid=%s",
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pid, uid, gid) |
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self.request_workers.AddTask(self, request, client_address) |
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def handle_error(self, request, client_address): |
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logging.exception("Error while handling request")
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@utils.SignalHandled([signal.SIGINT, signal.SIGTERM]) |
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def serve_forever(self, signal_handlers=None): # pylint: disable-msg=W0221 |
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"""Handle one request at a time until told to quit.""" |
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assert isinstance(signal_handlers, dict) and \ |
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len(signal_handlers) > 0, \ |
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"Broken SignalHandled decorator" |
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# Since we use SignalHandled only once, the resulting dict will map all |
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# signals to the same handler. We'll just use the first one. |
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sighandler = signal_handlers.values()[0] |
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while not sighandler.called: |
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self.handle_request() |
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def server_cleanup(self): |
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"""Cleanup the server. |
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|
| ... | ... | |
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""" |
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try: |
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self.server_close()
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self.close() |
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finally: |
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if self.request_workers: |
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self.request_workers.TerminateWorkers() |
| ... | ... | |
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# concurrent execution. |
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utils.RemoveFile(constants.MASTER_SOCKET) |
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master = IOServer(constants.MASTER_SOCKET, ClientRqHandler) |
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mainloop = daemon.Mainloop() |
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master = MasterServer(mainloop, constants.MASTER_SOCKET, ClientRqHandler) |
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try: |
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rpc.Init() |
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try: |
| ... | ... | |
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master.setup_queue() |
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try: |
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master.serve_forever()
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mainloop.Run()
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finally: |
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master.server_cleanup() |
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finally: |
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