Use oslo.service for launching sahara
Changes: * use launcher for running sahara modules * use wsgi server from oslo.service library Change-Id: I9ba8f1e751ce9bb9b9adcebda6509107b98e2fc8
This commit is contained in:
Sergey Reshetnyak
parent
4d39b4aad6
commit
2679167bfb
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@ -57,4 +57,6 @@ def main():
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server.setup_sahara_engine()
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server.setup_auth_policy()
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server.start_server(app)
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launcher = server.get_process_launcher()
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launcher.launch_service(server.SaharaWSGIService("sahara-all", app))
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launcher.wait()
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@ -55,4 +55,6 @@ def main():
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server.setup_sahara_api('distributed')
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server.setup_auth_policy()
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server.start_server(app)
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launcher = server.get_process_launcher()
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api_service = server.SaharaWSGIService("sahara-api", app)
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server.launch_api_service(launcher, api_service)
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@ -51,4 +51,6 @@ def main():
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server.setup_sahara_engine()
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ops_server = ops.OpsServer()
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ops_server.start()
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launcher = server.get_process_launcher()
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launcher.launch_service(ops_server.get_service())
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launcher.wait()
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@ -143,7 +143,6 @@ def list_opts():
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from sahara.utils import poll_utils
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from sahara.utils import proxy
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from sahara.utils import ssh_remote
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from sahara.utils import wsgi
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return [
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(None,
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@ -161,7 +160,6 @@ def list_opts():
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periodic.periodic_opts,
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proxy.opts,
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cpo.event_log_opts,
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wsgi.wsgi_opts,
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base.opts,
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heat_engine.heat_engine_opts,
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ssh_remote.ssh_config_options)),
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@ -17,7 +17,8 @@ import os
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from oslo_config import cfg
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from oslo_log import log
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from oslo_service import systemd
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from oslo_service import service as oslo_service
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from oslo_service import sslutils
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from oslo_service import wsgi as oslo_wsgi
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import stevedore
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@ -33,7 +34,6 @@ from sahara.service import periodic
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from sahara.utils.openstack import cinder
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from sahara.utils import remote
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from sahara.utils import rpc as messaging
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from sahara.utils import wsgi
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LOG = log.getLogger(__name__)
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@ -49,7 +49,7 @@ opts = [
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default='ssh',
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help='A method for Sahara to execute commands '
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'on VMs.'),
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cfg.IntOpt('api_workers', default=0,
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cfg.IntOpt('api_workers', default=1,
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help="Number of workers for Sahara API service (0 means "
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"all-in-one-thread configuration).")
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]
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@ -58,6 +58,13 @@ CONF = cfg.CONF
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CONF.register_opts(opts)
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class SaharaWSGIService(oslo_wsgi.Server):
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def __init__(self, service_name, app):
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super(SaharaWSGIService, self).__init__(
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CONF, service_name, app, host=CONF.host, port=CONF.port,
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use_ssl=sslutils.is_enabled(CONF))
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def setup_common(possible_topdir, service_name):
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dev_conf = os.path.join(possible_topdir,
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'etc',
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@ -145,8 +152,10 @@ def _get_ops_driver(driver_name):
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return _load_driver('sahara.run.mode', driver_name)
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def start_server(app):
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server = wsgi.Server()
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server.start(app)
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systemd.notify_once()
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server.wait()
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def get_process_launcher():
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return oslo_service.ProcessLauncher(CONF)
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def launch_api_service(launcher, service):
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launcher.launch_service(service, workers=CONF.api_workers)
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launcher.wait()
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@ -89,9 +89,8 @@ class RPCServer(object):
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endpoints=[self],
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executor='eventlet')
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def start(self):
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self.__server.start()
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self.__server.wait()
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def get_service(self):
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return self.__server
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def setup():
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@ -19,35 +19,17 @@
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"""Utility methods for working with WSGI servers."""
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import datetime
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import errno
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import os
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import signal
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import eventlet
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from eventlet import wsgi
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from oslo_config import cfg
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from oslo_log import log as logging
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from oslo_serialization import jsonutils
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from oslo_service import sslutils
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from sahara import exceptions
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from sahara.i18n import _
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from sahara.i18n import _LE
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from sahara.i18n import _LI
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LOG = logging.getLogger(__name__)
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wsgi_opts = [
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cfg.IntOpt('max_header_line',
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default=16384,
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help="Maximum line size of message headers to be accepted. "
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"max_header_line may need to be increased when using "
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"large tokens (typically those generated by the "
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"Keystone v3 API with big service catalogs)."),
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]
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CONF = cfg.CONF
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CONF.register_opts(wsgi_opts)
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class ActionDispatcher(object):
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@ -106,113 +88,3 @@ class JSONDeserializer(TextDeserializer):
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def default(self, datastring):
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return {'body': self._from_json(datastring)}
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class Server(object):
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"""Server class to manage multiple WSGI sockets and applications."""
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def __init__(self, threads=500):
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eventlet.wsgi.MAX_HEADER_LINE = CONF.max_header_line
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self.threads = threads
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self.children = []
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self.running = True
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def start(self, application):
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"""Run a WSGI server with the given application.
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:param application: The application to run in the WSGI server
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"""
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def kill_children(*args):
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"""Kills the entire process group."""
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LOG.error(_LE('SIGTERM received'))
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signal.signal(signal.SIGTERM, signal.SIG_IGN)
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self.running = False
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os.killpg(0, signal.SIGTERM)
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def hup(*args):
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"""Shuts down the server(s).
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Shuts down the server(s), but allows running requests to complete
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"""
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LOG.error(_LE('SIGHUP received'))
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signal.signal(signal.SIGHUP, signal.SIG_IGN)
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os.killpg(0, signal.SIGHUP)
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signal.signal(signal.SIGHUP, hup)
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self.application = application
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self.sock = eventlet.listen((CONF.host, CONF.port), backlog=500)
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if sslutils.is_enabled(CONF):
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LOG.info(_LI("Using HTTPS for port %s"), CONF.port)
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self.sock = sslutils.wrap(CONF, self.sock)
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if CONF.api_workers == 0:
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# Useful for profiling, test, debug etc.
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self.pool = eventlet.GreenPool(size=self.threads)
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self.pool.spawn_n(self._single_run, application, self.sock)
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return
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LOG.debug("Starting %d workers", CONF.api_workers)
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signal.signal(signal.SIGTERM, kill_children)
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signal.signal(signal.SIGHUP, hup)
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while len(self.children) < CONF.api_workers:
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self.run_child()
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def wait_on_children(self):
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while self.running:
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try:
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pid, status = os.wait()
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if os.WIFEXITED(status) or os.WIFSIGNALED(status):
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if pid in self.children:
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LOG.error(_LE('Removing dead child %s'), pid)
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self.children.remove(pid)
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self.run_child()
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except OSError as err:
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if err.errno not in (errno.EINTR, errno.ECHILD):
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raise
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except KeyboardInterrupt:
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LOG.info(_LI('Caught keyboard interrupt. Exiting.'))
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os.killpg(0, signal.SIGTERM)
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break
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eventlet.greenio.shutdown_safe(self.sock)
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self.sock.close()
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LOG.debug('Server exited')
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def wait(self):
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"""Wait until all servers have completed running."""
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try:
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if self.children:
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self.wait_on_children()
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else:
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self.pool.waitall()
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except KeyboardInterrupt:
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pass
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def run_child(self):
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pid = os.fork()
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if pid == 0:
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signal.signal(signal.SIGHUP, signal.SIG_DFL)
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signal.signal(signal.SIGTERM, signal.SIG_DFL)
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self.run_server()
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LOG.debug('Child %d exiting normally', os.getpid())
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return
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else:
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LOG.info(_LI('Started child %s'), pid)
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self.children.append(pid)
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def run_server(self):
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"""Run a WSGI server."""
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self.pool = eventlet.GreenPool(size=self.threads)
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wsgi.server(self.sock,
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self.application,
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custom_pool=self.pool,
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log=LOG,
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debug=False)
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self.pool.waitall()
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def _single_run(self, application, sock):
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"""Start a WSGI server in a new green thread."""
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LOG.info(_LI("Starting single process server"))
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eventlet.wsgi.server(sock, application,
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custom_pool=self.pool,
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log=LOG,
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debug=False)
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@ -10,3 +10,4 @@ namespace = oslo.middleware.cors
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namespace = oslo.policy
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namespace = oslo.service.periodic_task
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namespace = oslo.service.sslutils
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namespace = oslo.service.wsgi
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