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vmware-vspc
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Initial public version

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Radoslav Gerganov 2017-02-10 16:06:57 +02:00
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__pycache__/
*.py[cod]
.idea
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venv/

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========================================================================
This program includes a modified version of the telnetlib module from Python3
which has the following license:
PYTHON SOFTWARE FOUNDATION LICENSE VERSION 2
--------------------------------------------
1. This LICENSE AGREEMENT is between the Python Software Foundation
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vmware-vspc
===========
Virtual Serial Port Concentrator for use in the vSphere environment. It collects
serial console logs from VMs which have configured virtual serial port pointing
to it.
Usage
=====
Copy ``vspc.conf.sample`` as ``vspc.conf`` and edit as appropriate::
[DEFAULT]
debug = True
host = 0.0.0.0
port = 13370
cert = cert.pem
key = key.pem
uri = vmware-vspc
serial_log_dir = /opt/vmware/vspc
Then start with::
$ vmware-vspc --config-file vspc.conf

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[DEFAULT]
debug = True
host = 0.0.0.0
port = 13370
cert = cert.pem
key = key.pem
uri = vmware-vspc
serial_log_dir = /opt/vmware/vspc

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oslo.config>=3.7.0 # Apache-2.0
oslo.log>=1.14.0 # Apache-2.0

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from setuptools import setup
with open('README.rst') as f:
readme = f.read()
with open('LICENSE') as f:
license = f.read()
setup(
name='vmware-vspc',
version='0.0.1',
description='Virtual Serial Port Concentrator',
long_description=readme,
author='VMware Inc.',
author_email='rgerganov@vmware.com',
url='https://github.com/rgerganov/vmware-vspc',
license=license,
entry_points = {
'console_scripts': ['vmware-vspc=vspc.server:main'],
},
packages=['vspc'],
install_requires=['oslo.config', 'oslo.log']
)

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flake8

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[tox]
envlist = py34,pep8
skipsdist = True
[testenv]
deps = -rrequirements.txt
-rtest-requirements.txt
#commands = python setup.py testr --slowest --testr-args='{posargs}'
[testenv:pep8]
basepython = /usr/bin/python3
commands = flake8
[flake8]
ignore = E121,E122,E123,E124,E125,E126,E127,E128,E129,E131,E251,H405
exclude = venv,.venv,.git,.tox,dist,doc,*lib/python*,*egg,build

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# Copyright (c) 2001-2016 Python Software Foundation
# Copyright (c) 2017 VMware Inc.
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
"""
Telnet client class using asyncio.
Based on the standard telnetlib module from Python3.
"""
import asyncio
# Telnet protocol characters (don't change)
IAC = bytes([255]) # "Interpret As Command"
DONT = bytes([254])
DO = bytes([253])
WONT = bytes([252])
WILL = bytes([251])
theNULL = bytes([0])
SE = bytes([240]) # Subnegotiation End
NOP = bytes([241]) # No Operation
SB = bytes([250]) # Subnegotiation Begin
NOOPT = bytes([0])
class AsyncTelnet:
def __init__(self, reader, opt_handler):
self._reader = reader
self._opt_handler = opt_handler
self.rawq = b''
self.irawq = 0
self.cookedq = b''
self.eof = 0
self.iacseq = b'' # Buffer for IAC sequence.
self.sb = 0 # flag for SB and SE sequence.
self.sbdataq = b''
@asyncio.coroutine
def process_rawq(self):
"""Transfer from raw queue to cooked queue.
Set self.eof when connection is closed.
"""
buf = [b'', b'']
try:
while self.rawq:
c = yield from self.rawq_getchar()
if not self.iacseq:
if self.sb == 0 and c == theNULL:
continue
if self.sb == 0 and c == b"\021":
continue
if c != IAC:
buf[self.sb] = buf[self.sb] + c
continue
else:
self.iacseq += c
elif len(self.iacseq) == 1:
# 'IAC: IAC CMD [OPTION only for WILL/WONT/DO/DONT]'
if c in (DO, DONT, WILL, WONT):
self.iacseq += c
continue
self.iacseq = b''
if c == IAC:
buf[self.sb] = buf[self.sb] + c
else:
if c == SB: # SB ... SE start.
self.sb = 1
self.sbdataq = b''
elif c == SE:
self.sb = 0
self.sbdataq = self.sbdataq + buf[1]
buf[1] = b''
yield from self._opt_handler(c, NOOPT,
data=self.sbdataq)
elif len(self.iacseq) == 2:
cmd = self.iacseq[1:2]
self.iacseq = b''
opt = c
if cmd in (DO, DONT):
yield from self._opt_handler(cmd, opt)
elif cmd in (WILL, WONT):
yield from self._opt_handler(cmd, opt)
except EOFError: # raised by self.rawq_getchar()
self.iacseq = b'' # Reset on EOF
self.sb = 0
pass
self.cookedq = self.cookedq + buf[0]
self.sbdataq = self.sbdataq + buf[1]
@asyncio.coroutine
def rawq_getchar(self):
"""Get next char from raw queue.
Raise EOFError when connection is closed.
"""
if not self.rawq:
yield from self.fill_rawq()
if self.eof:
raise EOFError
c = self.rawq[self.irawq:self.irawq + 1]
self.irawq = self.irawq + 1
if self.irawq >= len(self.rawq):
self.rawq = b''
self.irawq = 0
return c
@asyncio.coroutine
def fill_rawq(self):
"""Fill raw queue from exactly one recv() system call.
Set self.eof when connection is closed.
"""
if self.irawq >= len(self.rawq):
self.rawq = b''
self.irawq = 0
# The buffer size should be fairly small so as to avoid quadratic
# behavior in process_rawq() above
buf = yield from self._reader.read(50)
self.eof = (not buf)
self.rawq = self.rawq + buf
@asyncio.coroutine
def read_some(self):
"""Read at least one byte of cooked data unless EOF is hit.
Return b'' if EOF is hit.
"""
yield from self.process_rawq()
while not self.cookedq and not self.eof:
yield from self.fill_rawq()
yield from self.process_rawq()
buf = self.cookedq
self.cookedq = b''
return buf

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#!/usr/bin/env python3
# Copyright (c) 2017 VMware Inc.
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import asyncio
import functools
import os
import ssl
import sys
from oslo_config import cfg
from oslo_log import log as logging
from vspc import async_telnet
from vspc.async_telnet import IAC, SB, SE, DO, DONT, WILL, WONT
opts = [
cfg.StrOpt('host',
default='0.0.0.0',
help='Host on which to listen for incoming requests'),
cfg.IntOpt('port',
default=13370,
help='Port on which to listen for incoming requests'),
cfg.StrOpt('cert', help='SSL certificate file'),
cfg.StrOpt('key', help='SSL key file (if separate from cert)'),
cfg.StrOpt('uri', help='VSPC URI'),
cfg.StrOpt('serial_log_dir', help='The directory where serial logs are '
'saved'),
]
CONF = cfg.CONF
CONF.register_opts(opts)
LOG = logging.getLogger(__name__)
BINARY = bytes([0]) # 8-bit data path
SGA = bytes([3]) # suppress go ahead
VMWARE_EXT = bytes([232])
KNOWN_SUBOPTIONS_1 = bytes([0])
KNOWN_SUBOPTIONS_2 = bytes([1])
VMOTION_BEGIN = bytes([40])
VMOTION_GOAHEAD = bytes([41])
VMOTION_NOTNOW = bytes([43])
VMOTION_PEER = bytes([44])
VMOTION_PEER_OK = bytes([45])
VMOTION_COMPLETE = bytes([46])
VMOTION_ABORT = bytes([48])
VM_VC_UUID = bytes([80])
GET_VM_VC_UUID = bytes([81])
VM_NAME = bytes([82])
GET_VM_NAME = bytes([83])
DO_PROXY = bytes([70])
WILL_PROXY = bytes([71])
WONT_PROXY = bytes([73])
SUPPORTED_OPTS = (KNOWN_SUBOPTIONS_1 + KNOWN_SUBOPTIONS_2 + VMOTION_BEGIN +
VMOTION_GOAHEAD + VMOTION_NOTNOW + VMOTION_PEER +
VMOTION_PEER_OK + VMOTION_COMPLETE + VMOTION_ABORT +
VM_VC_UUID + GET_VM_VC_UUID + VM_NAME + GET_VM_NAME +
DO_PROXY + WILL_PROXY + WONT_PROXY)
class VspcServer(object):
def __init__(self):
self.sock_to_uuid = dict()
@asyncio.coroutine
def handle_known_suboptions(self, writer, data):
socket = writer.get_extra_info('socket')
peer = socket.getpeername()
LOG.debug("<< %s KNOWN-SUBOPTIONS-1 %s", peer, data)
LOG.debug(">> %s KNOWN-SUBOPTIONS-2 %s", peer, SUPPORTED_OPTS)
writer.write(IAC + SB + VMWARE_EXT + KNOWN_SUBOPTIONS_2 +
SUPPORTED_OPTS + IAC + SE)
LOG.debug(">> %s GET-VM-VC-UUID", peer)
writer.write(IAC + SB + VMWARE_EXT + GET_VM_VC_UUID + IAC + SE)
yield from writer.drain()
@asyncio.coroutine
def handle_do_proxy(self, writer, data):
socket = writer.get_extra_info('socket')
peer = socket.getpeername()
dir, uri = data[0], data[1:].decode('ascii')
LOG.debug("<< %s DO-PROXY %c %s", peer, dir, uri)
if chr(dir) != 'S' or uri != CONF.uri:
LOG.debug(">> %s WONT-PROXY", peer)
writer.write(IAC + SB + VMWARE_EXT + WONT_PROXY + IAC + SE)
yield from writer.drain()
writer.close()
else:
LOG.debug(">> %s WILL-PROXY", peer)
writer.write(IAC + SB + VMWARE_EXT + WILL_PROXY + IAC + SE)
yield from writer.drain()
def handle_vm_vc_uuid(self, socket, data):
peer = socket.getpeername()
uuid = data[2:].decode('ascii')
LOG.debug("<< %s VM-VC-UUID %s", peer, uuid)
uuid = uuid.replace(' ', '')
self.sock_to_uuid[socket] = uuid
@asyncio.coroutine
def handle_vmotion_begin(self, writer, data):
socket = writer.get_extra_info('socket')
peer = socket.getpeername()
LOG.debug("<< %s VMOTION-BEGIN %s", peer, data)
secret = os.urandom(4)
LOG.debug(">> %s VMOTION-GOAHEAD %s %s", peer, data, secret)
writer.write(IAC + SB + VMWARE_EXT + VMOTION_GOAHEAD +
data + secret + IAC + SE)
yield from writer.drain()
@asyncio.coroutine
def handle_vmotion_peer(self, writer, data):
socket = writer.get_extra_info('socket')
peer = socket.getpeername()
LOG.debug("<< %s VMOTION-PEER %s", peer, data)
LOG.debug("<< %s VMOTION-PEER-OK %s", peer, data)
writer.write(IAC + SB + VMWARE_EXT + VMOTION_PEER_OK + data + IAC + SE)
yield from writer.drain()
def handle_vmotion_complete(self, socket, data):
peer = socket.getpeername()
LOG.debug("<< %s VMOTION-COMPLETE %s", peer, data)
@asyncio.coroutine
def handle_do(self, writer, opt):
socket = writer.get_extra_info('socket')
peer = socket.getpeername()
LOG.debug("<< %s DO %s", peer, opt)
if opt in (BINARY, SGA):
LOG.debug(">> %s WILL", peer)
writer.write(IAC + WILL + opt)
yield from writer.drain()
else:
LOG.debug(">> %s WONT", peer)
writer.write(IAC + WONT + opt)
yield from writer.drain()
@asyncio.coroutine
def handle_will(self, writer, opt):
socket = writer.get_extra_info('socket')
peer = socket.getpeername()
LOG.debug("<< %s WILL %s", peer, opt)
if opt in (BINARY, SGA, VMWARE_EXT):
LOG.debug(">> %s DO", peer)
writer.write(IAC + DO + opt)
yield from writer.drain()
else:
LOG.debug(">> %s DONT", peer)
writer.write(IAC + DONT + opt)
yield from writer.drain()
@asyncio.coroutine
def option_handler(self, cmd, opt, writer, data=None):
socket = writer.get_extra_info('socket')
if cmd == SE and data[0:1] == VMWARE_EXT:
vmw_cmd = data[1:2]
if vmw_cmd == KNOWN_SUBOPTIONS_1:
yield from self.handle_known_suboptions(writer, data[2:])
elif vmw_cmd == DO_PROXY:
yield from self.handle_do_proxy(writer, data[2:])
elif vmw_cmd == VM_VC_UUID:
self.handle_vm_vc_uuid(socket, data[2:])
elif vmw_cmd == VMOTION_BEGIN:
yield from self.handle_vmotion_begin(writer, data[2:])
elif vmw_cmd == VMOTION_PEER:
yield from self.handle_vmotion_peer(writer, data[2:])
elif vmw_cmd == VMOTION_COMPLETE:
self.handle_vmotion_complete(socket, data[2:])
else:
LOG.error("Unknown VMware cmd: %s %s", vmw_cmd, data[2:])
writer.close()
elif cmd == DO:
yield from self.handle_do(writer, opt)
elif cmd == WILL:
yield from self.handle_will(writer, opt)
def save_to_log(self, uuid, data):
fpath = os.path.join(CONF.serial_log_dir, uuid)
with open(fpath, 'ab') as f:
f.write(data)
@asyncio.coroutine
def handle_telnet(self, reader, writer):
opt_handler = functools.partial(self.option_handler, writer=writer)
telnet = async_telnet.AsyncTelnet(reader, opt_handler)
socket = writer.get_extra_info('socket')
peer = socket.getpeername()
LOG.info("%s connected", peer)
data = yield from telnet.read_some()
uuid = self.sock_to_uuid.get(socket)
if uuid is None:
LOG.error("%s didn't present UUID", peer)
writer.close()
return
try:
while data:
self.save_to_log(uuid, data)
data = yield from telnet.read_some()
finally:
self.sock_to_uuid.pop(socket, None)
LOG.info("%s disconnected", peer)
writer.close()
def start(self):
loop = asyncio.get_event_loop()
ssl_context = None
if CONF.cert:
ssl_context = ssl.SSLContext(ssl.PROTOCOL_SSLv23)
ssl_context.load_cert_chain(certfile=CONF.cert, keyfile=CONF.key)
coro = asyncio.start_server(self.handle_telnet,
CONF.host,
CONF.port,
ssl=ssl_context,
loop=loop)
server = loop.run_until_complete(coro)
# Serve requests until Ctrl+C is pressed
LOG.info("Serving on %s", server.sockets[0].getsockname())
LOG.info("Log directory: %s", CONF.serial_log_dir)
try:
loop.run_forever()
except KeyboardInterrupt:
pass
# Close the server
server.close()
loop.run_until_complete(server.wait_closed())
loop.close()
def main():
logging.register_options(CONF)
CONF(sys.argv[1:], prog='vspc')
logging.setup(CONF, "vspc")
if not CONF.serial_log_dir:
LOG.error("serial_log_dir is not specified")
sys.exit(1)
if not os.path.exists(CONF.serial_log_dir):
LOG.info("Creating log directory: %s", CONF.serial_log_dir)
os.makedirs(CONF.serial_log_dir)
srv = VspcServer()
srv.start()
if __name__ == '__main__':
main()