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https://github.com/retspen/webvirtcloud
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Added tunnel.py & gunicorn
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145
console/tunnel.py
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145
console/tunnel.py
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# -*- coding: utf-8 -*-
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#
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# This class provide from VirtManager project, from console.py
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# file.
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#
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# Copyright (C) 2006-2008 Red Hat, Inc.
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# Copyright (C) 2006 Daniel P. Berrange <berrange@redhat.com>
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# Copyright (C) 2010 Marc-André Lureau <marcandre.lureau@redhat.com>
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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# MA 02110-1301 USA.
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#
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import os
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import socket
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import signal
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import logging
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class Tunnel(object):
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def __init__(self):
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self.outfd = None
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self.errfd = None
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self.pid = None
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def open(self, connhost, connuser, connport, gaddr, gport, gsocket):
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if self.outfd is not None:
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return -1
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# Build SSH cmd
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argv = ["ssh", "ssh"]
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if connport:
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argv += ["-p", str(connport)]
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if connuser:
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argv += ['-l', connuser]
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argv += [connhost]
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# Build 'nc' command run on the remote host
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#
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# This ugly thing is a shell script to detect availability of
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# the -q option for 'nc': debian and suse based distros need this
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# flag to ensure the remote nc will exit on EOF, so it will go away
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# when we close the VNC tunnel. If it doesn't go away, subsequent
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# VNC connection attempts will hang.
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#
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# Fedora's 'nc' doesn't have this option, and apparently defaults
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# to the desired behavior.
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#
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if gsocket:
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nc_params = "-U %s" % gsocket
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else:
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nc_params = "%s %s" % (gaddr, gport)
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nc_cmd = (
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"""nc -q 2>&1 | grep "requires an argument" >/dev/null;"""
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"""if [ $? -eq 0 ] ; then"""
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""" CMD="nc -q 0 %(nc_params)s";"""
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"""else"""
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""" CMD="nc %(nc_params)s";"""
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"""fi;"""
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"""eval "$CMD";""" %
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{'nc_params': nc_params})
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argv.append("sh -c")
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argv.append("'%s'" % nc_cmd)
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argv_str = reduce(lambda x, y: x + " " + y, argv[1:])
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logging.debug("Creating SSH tunnel: %s", argv_str)
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fds = socket.socketpair()
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errorfds = socket.socketpair()
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pid = os.fork()
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if pid == 0:
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fds[0].close()
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errorfds[0].close()
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os.close(0)
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os.close(1)
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os.close(2)
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os.dup(fds[1].fileno())
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os.dup(fds[1].fileno())
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os.dup(errorfds[1].fileno())
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os.execlp(*argv)
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os._exit(1)
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else:
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fds[1].close()
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errorfds[1].close()
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logging.debug("Tunnel PID=%d OUTFD=%d ERRFD=%d",
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pid, fds[0].fileno(), errorfds[0].fileno())
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errorfds[0].setblocking(0)
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self.outfd = fds[0]
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self.errfd = errorfds[0]
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self.pid = pid
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fd = fds[0].fileno()
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if fd < 0:
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raise SystemError("can't open a new tunnel: fd=%d" % fd)
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return fd
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def close(self):
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if self.outfd is None:
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return
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logging.debug("Shutting down tunnel PID=%d OUTFD=%d ERRFD=%d",
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self.pid, self.outfd.fileno(),
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self.errfd.fileno())
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self.outfd.close()
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self.outfd = None
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self.errfd.close()
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self.errfd = None
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os.kill(self.pid, signal.SIGKILL)
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self.pid = None
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def get_err_output(self):
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errout = ""
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while True:
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try:
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new = self.errfd.recv(1024)
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except:
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break
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if not new:
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break
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errout += new
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return errout
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210
webvirtcloud/gunicorn.conf.py
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210
webvirtcloud/gunicorn.conf.py
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import os
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# Sample Gunicorn configuration file.
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#
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# Server socket
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#
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# bind - The socket to bind.
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#
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# A string of the form: 'HOST', 'HOST:PORT', 'unix:PATH'.
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# An IP is a valid HOST.
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#
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# backlog - The number of pending connections. This refers
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# to the number of clients that can be waiting to be
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# served. Exceeding this number results in the client
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# getting an error when attempting to connect. It should
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# only affect servers under significant load.
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#
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# Must be a positive integer. Generally set in the 64-2048
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# range.
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#
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bind = '127.0.0.1:8000'
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backlog = 2048
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#
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# Worker processes
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#
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# workers - The number of worker processes that this server
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# should keep alive for handling requests.
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#
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# A positive integer generally in the 2-4 x $(NUM_CORES)
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# range. You'll want to vary this a bit to find the best
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# for your particular application's work load.
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#
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# worker_class - The type of workers to use. The default
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# async class should handle most 'normal' types of work
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# loads. You'll want to read http://gunicorn/deployment.hml
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# for information on when you might want to choose one
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# of the other worker classes.
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#
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# An string referring to a 'gunicorn.workers' entry point
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# or a python path to a subclass of
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# gunicorn.workers.base.Worker. The default provided values
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# are:
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#
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# egg:gunicorn#sync
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# egg:gunicorn#eventlet - Requires eventlet >= 0.9.7
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# egg:gunicorn#gevent - Requires gevent >= 0.12.2 (?)
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# egg:gunicorn#tornado - Requires tornado >= 0.2
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#
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# worker_connections - For the eventlet and gevent worker classes
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# this limits the maximum number of simultaneous clients that
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# a single process can handle.
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#
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# A positive integer generally set to around 1000.
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#
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# timeout - If a worker does not notify the master process in this
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# number of seconds it is killed and a new worker is spawned
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# to replace it.
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#
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# Generally set to thirty seconds. Only set this noticeably
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# higher if you're sure of the repercussions for sync workers.
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# For the non sync workers it just means that the worker
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# process is still communicating and is not tied to the length
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# of time required to handle a single request.
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#
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# keepalive - The number of seconds to wait for the next request
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# on a Keep-Alive HTTP connection.
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#
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# A positive integer. Generally set in the 1-5 seconds range.
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#
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def get_workers():
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procs = os.sysconf('SC_NPROCESSORS_ONLN')
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if procs > 0:
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return procs * 2 + 1
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else:
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return 3
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workers = get_workers()
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# worker_class = 'egg:gunicorn#eventlet'
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worker_connections = 1000
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timeout = 600
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keepalive = 2
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#
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# Debugging
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#
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# debug - Turn on debugging in the server. This limits the number of
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# worker processes to 1 and changes some error handling that's
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# sent to clients.
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#
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# True or False
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#
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# spew - Install a trace function that spews every line of Python
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# that is executed when running the server. This is the
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# nuclear option.
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#
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# True or False
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#
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debug = False
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spew = False
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#
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# Server mechanics
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#
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# daemon - Detach the main Gunicorn process from the controlling
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# terminal with a standard fork/fork sequence.
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#
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# True or False
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#
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# pidfile - The path to a pid file to write
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#
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# A path string or None to not write a pid file.
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#
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# user - Switch worker processes to run as this user.
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#
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# A valid user id (as an integer) or the name of a user that
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# can be retrieved with a call to pwd.getpwnam(value) or None
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# to not change the worker process user.
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#
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# group - Switch worker process to run as this group.
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#
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# A valid group id (as an integer) or the name of a user that
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# can be retrieved with a call to pwd.getgrnam(value) or None
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# to change the worker processes group.
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#
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# umask - A mask for file permissions written by Gunicorn. Note that
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# this affects unix socket permissions.
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#
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# A valid value for the os.umask(mode) call or a string
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# compatible with int(value, 0) (0 means Python guesses
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# the base, so values like "0", "0xFF", "0022" are valid
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# for decimal, hex, and octal representations)
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#
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# tmp_upload_dir - A directory to store temporary request data when
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# requests are read. This will most likely be disappearing soon.
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#
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# A path to a directory where the process owner can write. Or
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# None to signal that Python should choose one on its own.
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#
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daemon = False
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pidfile = None
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umask = 0
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user = None
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group = None
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tmp_upload_dir = None
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#
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# Logging
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#
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# logfile - The path to a log file to write to.
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#
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# A path string. "-" means log to stdout.
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#
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# loglevel - The granularity of log output
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#
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# A string of "debug", "info", "warning", "error", "critical"
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#
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logfile = '-'
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loglevel = 'info'
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accesslog = '-'
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#
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# Process naming
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#
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# proc_name - A base to use with setproctitle to change the way
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# that Gunicorn processes are reported in the system process
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# table. This affects things like 'ps' and 'top'. If you're
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# going to be running more than one instance of Gunicorn you'll
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# probably want to set a name to tell them apart. This requires
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# that you install the setproctitle module.
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#
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# A string or None to choose a default of something like 'gunicorn'.
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#
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proc_name = None
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#
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# Server hooks
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#
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# post_fork - Called just after a worker has been forked.
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#
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# A callable that takes a server and worker instance
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# as arguments.
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#
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# pre_fork - Called just prior to forking the worker subprocess.
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#
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# A callable that accepts the same arguments as after_fork
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#
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# pre_exec - Called just prior to forking off a secondary
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# master process during things like config reloading.
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#
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# A callable that takes a server instance as the sole argument.
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#
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#
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# def post_fork(server, worker):
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# pass
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#
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# def pre_fork(server, worker):
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# pass
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#
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# def pre_exec(server):
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# pass
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