mirror of
https://github.com/GNS3/gns3-server.git
synced 2024-12-23 14:42:28 +00:00
461 lines
16 KiB
Python
461 lines
16 KiB
Python
# -*- coding: utf-8 -*-
|
|
#
|
|
# Copyright (C) 2015 GNS3 Technologies Inc.
|
|
#
|
|
# This program is free software: you can redistribute it and/or modify
|
|
# it under the terms of the GNU General Public License as published by
|
|
# the Free Software Foundation, either version 3 of the License, or
|
|
# (at your option) any later version.
|
|
#
|
|
# This program is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
# GNU General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU General Public License
|
|
# along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
"""
|
|
IOU VM management (creates command line, processes, files etc.) in
|
|
order to run an IOU instance.
|
|
"""
|
|
|
|
import os
|
|
import sys
|
|
import subprocess
|
|
import signal
|
|
import re
|
|
import asyncio
|
|
import shutil
|
|
|
|
from pkg_resources import parse_version
|
|
from .iou_error import IOUError
|
|
from ..adapters.ethernet_adapter import EthernetAdapter
|
|
from ..adapters.serial_adapter import SerialAdapter
|
|
from ..base_vm import BaseVM
|
|
|
|
|
|
import logging
|
|
log = logging.getLogger(__name__)
|
|
|
|
|
|
class IOUVM(BaseVM):
|
|
module_name = 'iou'
|
|
|
|
"""
|
|
IOU vm implementation.
|
|
|
|
:param name: name of this IOU vm
|
|
:param vm_id: IOU instance identifier
|
|
:param project: Project instance
|
|
:param manager: parent VM Manager
|
|
:param console: TCP console port
|
|
"""
|
|
|
|
def __init__(self, name, vm_id, project, manager, console=None):
|
|
|
|
super().__init__(name, vm_id, project, manager)
|
|
|
|
self._console = console
|
|
self._command = []
|
|
self._iouyap_process = None
|
|
self._iou_process = None
|
|
self._iou_stdout_file = ""
|
|
self._started = False
|
|
self._iou_path = None
|
|
self._iourc = None
|
|
self._ioucon_thread = None
|
|
|
|
# IOU settings
|
|
self._ethernet_adapters = [EthernetAdapter(), EthernetAdapter()] # one adapter = 4 interfaces
|
|
self._serial_adapters = [SerialAdapter(), SerialAdapter()] # one adapter = 4 interfaces
|
|
self._slots = self._ethernet_adapters + self._serial_adapters
|
|
self._use_default_iou_values = True # for RAM & NVRAM values
|
|
self._nvram = 128 # Kilobytes
|
|
self._initial_config = ""
|
|
self._ram = 256 # Megabytes
|
|
self._l1_keepalives = False # used to overcome the always-up Ethernet interfaces (not supported by all IOSes).
|
|
|
|
if self._console is not None:
|
|
self._console = self._manager.port_manager.reserve_console_port(self._console)
|
|
else:
|
|
self._console = self._manager.port_manager.get_free_console_port()
|
|
|
|
def close(self):
|
|
|
|
if self._console:
|
|
self._manager.port_manager.release_console_port(self._console)
|
|
self._console = None
|
|
|
|
@property
|
|
def iou_path(self):
|
|
"""Path of the iou binary"""
|
|
|
|
return self._iou_path
|
|
|
|
@iou_path.setter
|
|
def iou_path(self, path):
|
|
"""
|
|
Path of the iou binary
|
|
|
|
:params path: Path to the binary
|
|
"""
|
|
|
|
self._iou_path = path
|
|
if not os.path.isfile(self._iou_path) or not os.path.exists(self._iou_path):
|
|
if os.path.islink(self._iou_path):
|
|
raise IOUError("IOU image '{}' linked to '{}' is not accessible".format(self._iou_path, os.path.realpath(self._iou_path)))
|
|
else:
|
|
raise IOUError("IOU image '{}' is not accessible".format(self._iou_path))
|
|
|
|
try:
|
|
with open(self._iou_path, "rb") as f:
|
|
# read the first 7 bytes of the file.
|
|
elf_header_start = f.read(7)
|
|
except OSError as e:
|
|
raise IOUError("Cannot read ELF header for IOU image '{}': {}".format(self._iou_path, e))
|
|
|
|
# IOU images must start with the ELF magic number, be 32-bit, little endian
|
|
# and have an ELF version of 1 normal IOS image are big endian!
|
|
if elf_header_start != b'\x7fELF\x01\x01\x01':
|
|
raise IOUError("'{}' is not a valid IOU image".format(self._iou_path))
|
|
|
|
if not os.access(self._iou_path, os.X_OK):
|
|
raise IOUError("IOU image '{}' is not executable".format(self._iou_path))
|
|
|
|
@property
|
|
def iourc(self):
|
|
"""
|
|
Returns the path to the iourc file.
|
|
:returns: path to the iourc file
|
|
"""
|
|
|
|
return self._iourc
|
|
|
|
@property
|
|
def use_default_iou_values(self):
|
|
"""
|
|
Returns if this device uses the default IOU image values.
|
|
:returns: boolean
|
|
"""
|
|
|
|
return self._use_default_iou_values
|
|
|
|
@use_default_iou_values.setter
|
|
def use_default_iou_values(self, state):
|
|
"""
|
|
Sets if this device uses the default IOU image values.
|
|
:param state: boolean
|
|
"""
|
|
|
|
self._use_default_iou_values = state
|
|
if state:
|
|
log.info("IOU {name} [id={id}]: uses the default IOU image values".format(name=self._name, id=self._id))
|
|
else:
|
|
log.info("IOU {name} [id={id}]: does not use the default IOU image values".format(name=self._name, id=self._id))
|
|
|
|
@iourc.setter
|
|
def iourc(self, iourc):
|
|
"""
|
|
Sets the path to the iourc file.
|
|
:param iourc: path to the iourc file.
|
|
"""
|
|
|
|
self._iourc = iourc
|
|
log.info("IOU {name} [id={id}]: iourc file path set to {path}".format(name=self._name,
|
|
id=self._id,
|
|
path=self._iourc))
|
|
|
|
def _check_requirements(self):
|
|
"""
|
|
Check if IOUYAP is available
|
|
"""
|
|
path = self.iouyap_path
|
|
if not path:
|
|
raise IOUError("No path to a IOU executable has been set")
|
|
|
|
if not os.path.isfile(path):
|
|
raise IOUError("IOU program '{}' is not accessible".format(path))
|
|
|
|
if not os.access(path, os.X_OK):
|
|
raise IOUError("IOU program '{}' is not executable".format(path))
|
|
|
|
def __json__(self):
|
|
|
|
return {"name": self.name,
|
|
"vm_id": self.id,
|
|
"console": self._console,
|
|
"project_id": self.project.id,
|
|
}
|
|
|
|
@property
|
|
def iouyap_path(self):
|
|
"""
|
|
Returns the IOUYAP executable path.
|
|
|
|
:returns: path to IOUYAP
|
|
"""
|
|
|
|
path = self._manager.config.get_section_config("IOU").get("iouyap_path", "iouyap")
|
|
if path == "iouyap":
|
|
path = shutil.which("iouyap")
|
|
return path
|
|
|
|
@property
|
|
def console(self):
|
|
"""
|
|
Returns the console port of this IOU vm.
|
|
|
|
:returns: console port
|
|
"""
|
|
|
|
return self._console
|
|
|
|
@console.setter
|
|
def console(self, console):
|
|
"""
|
|
Change console port
|
|
|
|
:params console: Console port (integer)
|
|
"""
|
|
|
|
if console == self._console:
|
|
return
|
|
if self._console:
|
|
self._manager.port_manager.release_console_port(self._console)
|
|
self._console = self._manager.port_manager.reserve_console_port(console)
|
|
|
|
@property
|
|
def application_id(self):
|
|
return self._manager.get_application_id(self.id)
|
|
|
|
#TODO: ASYNCIO
|
|
def _library_check(self):
|
|
"""
|
|
Checks for missing shared library dependencies in the IOU image.
|
|
"""
|
|
|
|
try:
|
|
output = subprocess.check_output(["ldd", self._iou_path])
|
|
except (FileNotFoundError, subprocess.SubprocessError) as e:
|
|
log.warn("could not determine the shared library dependencies for {}: {}".format(self._path, e))
|
|
return
|
|
|
|
p = re.compile("([\.\w]+)\s=>\s+not found")
|
|
missing_libs = p.findall(output.decode("utf-8"))
|
|
if missing_libs:
|
|
raise IOUError("The following shared library dependencies cannot be found for IOU image {}: {}".format(self._path,
|
|
", ".join(missing_libs)))
|
|
|
|
@asyncio.coroutine
|
|
def start(self):
|
|
"""
|
|
Starts the IOU process.
|
|
"""
|
|
|
|
self._check_requirements()
|
|
if not self.is_running():
|
|
|
|
# TODO: ASYNC
|
|
#self._library_check()
|
|
|
|
if not self._iourc or not os.path.isfile(self._iourc):
|
|
raise IOUError("A valid iourc file is necessary to start IOU")
|
|
|
|
iouyap_path = self.iouyap_path
|
|
if not iouyap_path or not os.path.isfile(iouyap_path):
|
|
raise IOUError("iouyap is necessary to start IOU")
|
|
|
|
self._create_netmap_config()
|
|
# created a environment variable pointing to the iourc file.
|
|
env = os.environ.copy()
|
|
env["IOURC"] = self._iourc
|
|
self._command = self._build_command()
|
|
try:
|
|
log.info("Starting IOU: {}".format(self._command))
|
|
self._iou_stdout_file = os.path.join(self.working_dir, "iou.log")
|
|
log.info("Logging to {}".format(self._iou_stdout_file))
|
|
with open(self._iou_stdout_file, "w") as fd:
|
|
self._iou_process = yield from asyncio.create_subprocess_exec(self._command,
|
|
stdout=fd,
|
|
stderr=subprocess.STDOUT,
|
|
cwd=self.working_dir,
|
|
env=env)
|
|
log.info("IOU instance {} started PID={}".format(self._id, self._iou_process.pid))
|
|
self._started = True
|
|
except FileNotFoundError as e:
|
|
raise IOUError("could not start IOU: {}: 32-bit binary support is probably not installed".format(e))
|
|
except (OSError, subprocess.SubprocessError) as e:
|
|
iou_stdout = self.read_iou_stdout()
|
|
log.error("could not start IOU {}: {}\n{}".format(self._iou_path, e, iou_stdout))
|
|
raise IOUError("could not start IOU {}: {}\n{}".format(self._iou_path, e, iou_stdout))
|
|
|
|
# start console support
|
|
#self._start_ioucon()
|
|
# connections support
|
|
#self._start_iouyap()
|
|
|
|
|
|
@asyncio.coroutine
|
|
def stop(self):
|
|
"""
|
|
Stops the IOU process.
|
|
"""
|
|
|
|
# stop console support
|
|
if self._ioucon_thread:
|
|
self._ioucon_thread_stop_event.set()
|
|
if self._ioucon_thread.is_alive():
|
|
self._ioucon_thread.join(timeout=3.0) # wait for the thread to free the console port
|
|
self._ioucon_thread = None
|
|
|
|
if self.is_running():
|
|
self._terminate_process()
|
|
try:
|
|
yield from asyncio.wait_for(self._iou_process.wait(), timeout=3)
|
|
except asyncio.TimeoutError:
|
|
self._iou_process.kill()
|
|
if self._iou_process.returncode is None:
|
|
log.warn("IOU process {} is still running".format(self._iou_process.pid))
|
|
|
|
self._iou_process = None
|
|
self._started = False
|
|
|
|
def _terminate_process(self):
|
|
"""Terminate the process if running"""
|
|
|
|
if self._iou_process:
|
|
log.info("Stopping IOU instance {} PID={}".format(self.name, self._iou_process.pid))
|
|
try:
|
|
self._iou_process.terminate()
|
|
# Sometime the process can already be dead when we garbage collect
|
|
except ProcessLookupError:
|
|
pass
|
|
|
|
@asyncio.coroutine
|
|
def reload(self):
|
|
"""
|
|
Reload the IOU process. (Stop / Start)
|
|
"""
|
|
|
|
yield from self.stop()
|
|
yield from self.start()
|
|
|
|
def is_running(self):
|
|
"""
|
|
Checks if the IOU process is running
|
|
|
|
:returns: True or False
|
|
"""
|
|
|
|
if self._iou_process:
|
|
return True
|
|
return False
|
|
|
|
def _create_netmap_config(self):
|
|
"""
|
|
Creates the NETMAP file.
|
|
"""
|
|
|
|
netmap_path = os.path.join(self.working_dir, "NETMAP")
|
|
try:
|
|
with open(netmap_path, "w") as f:
|
|
for bay in range(0, 16):
|
|
for unit in range(0, 4):
|
|
f.write("{iouyap_id}:{bay}/{unit}{iou_id:>5d}:{bay}/{unit}\n".format(iouyap_id=str(self.application_id + 512),
|
|
bay=bay,
|
|
unit=unit,
|
|
iou_id=self.application_id))
|
|
log.info("IOU {name} [id={id}]: NETMAP file created".format(name=self._name,
|
|
id=self._id))
|
|
except OSError as e:
|
|
raise IOUError("Could not create {}: {}".format(netmap_path, e))
|
|
|
|
def _build_command(self):
|
|
"""
|
|
Command to start the IOU process.
|
|
(to be passed to subprocess.Popen())
|
|
IOU command line:
|
|
Usage: <image> [options] <application id>
|
|
<image>: unix-js-m | unix-is-m | unix-i-m | ...
|
|
<application id>: instance identifier (0 < id <= 1024)
|
|
Options:
|
|
-e <n> Number of Ethernet interfaces (default 2)
|
|
-s <n> Number of Serial interfaces (default 2)
|
|
-n <n> Size of nvram in Kb (default 64KB)
|
|
-b <string> IOS debug string
|
|
-c <name> Configuration file name
|
|
-d Generate debug information
|
|
-t Netio message trace
|
|
-q Suppress informational messages
|
|
-h Display this help
|
|
-C Turn off use of host clock
|
|
-m <n> Megabytes of router memory (default 256MB)
|
|
-L Disable local console, use remote console
|
|
-l Enable Layer 1 keepalive messages
|
|
-u <n> UDP port base for distributed networks
|
|
-R Ignore options from the IOURC file
|
|
-U Disable unix: file system location
|
|
-W Disable watchdog timer
|
|
-N Ignore the NETMAP file
|
|
"""
|
|
|
|
command = [self._iou_path]
|
|
if len(self._ethernet_adapters) != 2:
|
|
command.extend(["-e", str(len(self._ethernet_adapters))])
|
|
if len(self._serial_adapters) != 2:
|
|
command.extend(["-s", str(len(self._serial_adapters))])
|
|
if not self.use_default_iou_values:
|
|
command.extend(["-n", str(self._nvram)])
|
|
command.extend(["-m", str(self._ram)])
|
|
command.extend(["-L"]) # disable local console, use remote console
|
|
if self._initial_config:
|
|
command.extend(["-c", self._initial_config])
|
|
if self._l1_keepalives:
|
|
self._enable_l1_keepalives(command)
|
|
command.extend([str(self.application_id)])
|
|
return command
|
|
|
|
def read_iou_stdout(self):
|
|
"""
|
|
Reads the standard output of the IOU process.
|
|
Only use when the process has been stopped or has crashed.
|
|
"""
|
|
|
|
output = ""
|
|
if self._iou_stdout_file:
|
|
try:
|
|
with open(self._iou_stdout_file, errors="replace") as file:
|
|
output = file.read()
|
|
except OSError as e:
|
|
log.warn("could not read {}: {}".format(self._iou_stdout_file, e))
|
|
return output
|
|
|
|
def read_iouyap_stdout(self):
|
|
"""
|
|
Reads the standard output of the iouyap process.
|
|
Only use when the process has been stopped or has crashed.
|
|
"""
|
|
|
|
output = ""
|
|
if self._iouyap_stdout_file:
|
|
try:
|
|
with open(self._iouyap_stdout_file, errors="replace") as file:
|
|
output = file.read()
|
|
except OSError as e:
|
|
log.warn("could not read {}: {}".format(self._iouyap_stdout_file, e))
|
|
return output
|
|
|
|
def _start_ioucon(self):
|
|
"""
|
|
Starts ioucon thread (for console connections).
|
|
"""
|
|
|
|
if not self._ioucon_thread:
|
|
telnet_server = "{}:{}".format(self._console_host, self.console)
|
|
log.info("Starting ioucon for IOU instance {} to accept Telnet connections on {}".format(self._name, telnet_server))
|
|
args = argparse.Namespace(appl_id=str(self.application_id), debug=False, escape='^^', telnet_limit=0, telnet_server=telnet_server)
|
|
self._ioucon_thread_stop_event = threading.Event()
|
|
self._ioucon_thread = threading.Thread(target=start_ioucon, args=(args, self._ioucon_thread_stop_event))
|
|
self._ioucon_thread.start()
|