mirror of
https://github.com/GNS3/gns3-server.git
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c91f876656
Move the file uploader template. UDP port allocation (removed the host). Minor changes with iouyap lookup and remote server project directory.
278 lines
7.4 KiB
Python
278 lines
7.4 KiB
Python
# -*- coding: utf-8 -*-
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#
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# Copyright (C) 2013 GNS3 Technologies Inc.
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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 3 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, see <http://www.gnu.org/licenses/>.
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"""
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Represents a Dynamips hypervisor and starts/stops the associated Dynamips process.
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"""
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import os
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import time
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import subprocess
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from .dynamips_hypervisor import DynamipsHypervisor
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from .dynamips_error import DynamipsError
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import logging
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log = logging.getLogger(__name__)
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class Hypervisor(DynamipsHypervisor):
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"""
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Hypervisor.
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:param path: path to Dynamips executable
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:param working_dir: working directory
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:param port: port for this hypervisor
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:param host: host/address for this hypervisor
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"""
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_instance_count = 0
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def __init__(self, path, working_dir, host, port):
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DynamipsHypervisor.__init__(self, working_dir, host, port)
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# create an unique ID
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self._id = Hypervisor._instance_count
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Hypervisor._instance_count += 1
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self._path = path
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self._command = []
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self._process = None
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self._stdout_file = ""
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self._started = False
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# settings used the load-balance hypervisors
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# (for the hypervisor manager)
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self._memory_load = 0
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self._ios_image_ref = ""
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@property
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def id(self):
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"""
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Returns the unique ID for this hypervisor.
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:returns: id (integer)
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"""
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return(self._id)
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@property
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def started(self):
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"""
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Returns either this hypervisor has been started or not.
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:returns: boolean
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"""
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return self._started
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@property
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def path(self):
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"""
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Returns the path to the Dynamips executable.
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:returns: path to Dynamips
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"""
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return(self._path)
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@path.setter
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def path(self, path):
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"""
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Sets the path to the Dynamips executable.
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:param path: path to Dynamips
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"""
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self._path = path
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@property
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def port(self):
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"""
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Returns the port used to start the Dynamips hypervisor.
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:returns: port number (integer)
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"""
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return(self._port)
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@port.setter
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def port(self, port):
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"""
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Sets the port used to start the Dynamips hypervisor.
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:param port: port number (integer)
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"""
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self._port = port
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@property
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def host(self):
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"""
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Returns the host (binding) used to start the Dynamips hypervisor.
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:returns: host/address (string)
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"""
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return(self._host)
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@host.setter
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def host(self, host):
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"""
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Sets the host (binding) used to start the Dynamips hypervisor.
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:param host: host/address (string)
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"""
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self._host = host
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@property
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def image_ref(self):
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"""
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Returns the reference IOS image name
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(used by the hypervisor manager for load-balancing purposes).
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:returns: image reference name
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"""
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return self._ios_image_ref
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@image_ref.setter
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def image_ref(self, ios_image_name):
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"""
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Sets the reference IOS image name
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(used by the hypervisor manager for load-balancing purposes).
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:param ios_image_name: image reference name
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"""
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self._ios_image_ref = ios_image_name
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def increase_memory_load(self, memory):
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"""
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Increases the memory load of this hypervisor.
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(used by the hypervisor manager for load-balancing purposes).
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:param memory: amount of RAM (integer)
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"""
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self._memory_load += memory
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def decrease_memory_load(self, memory):
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"""
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Decreases the memory load of this hypervisor.
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(used by the hypervisor manager for load-balancing purposes).
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:param memory: amount of RAM (integer)
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"""
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self._memory_load -= memory
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@property
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def memory_load(self):
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"""
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Returns the memory load of this hypervisor.
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(used by the hypervisor manager for load-balancing purposes).
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:returns: amount of RAM (integer)
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"""
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return self._memory_load
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def start(self):
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"""
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Starts the Dynamips hypervisor process.
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"""
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self._command = self._build_command()
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try:
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log.info("starting Dynamips: {}".format(self._command))
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self._stdout_file = os.path.join(self._working_dir, "dynamips-{}.log".format(self._port))
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log.info("logging to {}".format(self._stdout_file))
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with open(self._stdout_file, "w") as fd:
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self._process = subprocess.Popen(self._command,
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stdout=fd,
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stderr=subprocess.STDOUT,
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cwd=self._working_dir)
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log.info("Dynamips started PID={}".format(self._process.pid))
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self._started = True
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except EnvironmentError as e:
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log.error("could not start Dynamips: {}".format(e))
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raise DynamipsError("could not start Dynamips: {}".format(e))
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def stop(self):
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"""
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Stops the Dynamips hypervisor process.
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"""
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if self.is_running():
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DynamipsHypervisor.stop(self)
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log.info("stopping Dynamips PID={}".format(self._process.pid))
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try:
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# give some time for the hypervisor to properly stop.
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# time to delete UNIX NIOs for instance.
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time.sleep(0.01)
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self._process.terminate()
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self._process.wait(1)
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except subprocess.TimeoutExpired:
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self._process.kill()
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if self._process.poll() == None:
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log.warn("Dynamips process {} is still running".format(self._process.pid))
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self._started = False
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def read_stdout(self):
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"""
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Reads the standard output of the Dynamips process.
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Only use when the process has been stopped or has crashed.
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"""
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output = ""
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if self._stdout_file:
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try:
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with open(self._stdout_file) as file:
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output = file.read()
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except EnvironmentError as e:
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log.warn("could not read {}: {}".format(self._stdout_file, e))
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return output
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def is_running(self):
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"""
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Checks if the process is running
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:returns: True or False
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"""
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if self._process and self._process.poll() == None:
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return True
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return False
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def _build_command(self):
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"""
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Command to start the Dynamips hypervisor process.
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(to be passed to subprocess.Popen())
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"""
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command = [self._path]
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command.extend(["-N1"]) # use instance IDs for filenames
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if self._host != '0.0.0.0':
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command.extend(['-H', self._host + ':' + str(self._port)])
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else:
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command.extend(['-H', str(self._port)])
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return command
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