mirror of
https://github.com/GNS3/gns3-server.git
synced 2024-12-24 06:56:42 +00:00
489 lines
16 KiB
Python
489 lines
16 KiB
Python
# -*- coding: utf-8 -*-
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#
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# Copyright (C) 2015 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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import os
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import stat
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import logging
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import aiohttp
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import shutil
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import asyncio
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import tempfile
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import psutil
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import platform
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from ..utils.asyncio import wait_run_in_executor
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from ..ubridge.hypervisor import Hypervisor
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from ..ubridge.ubridge_error import UbridgeError
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from .node_error import NodeError
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log = logging.getLogger(__name__)
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class BaseNode:
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"""
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Base node implementation.
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:param name: name of this node
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:param node_id: Node instance identifier
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:param project: Project instance
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:param manager: parent node manager
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:param console: TCP console port
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:param aux: TCP aux console port
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:param allocate_aux: Boolean if true will allocate an aux console port
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"""
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def __init__(self, name, node_id, project, manager, console=None, console_type="telnet", aux=None, allocate_aux=False):
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self._name = name
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self._usage = ""
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self._id = node_id
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self._project = project
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self._manager = manager
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self._console = console
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self._aux = aux
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self._console_type = console_type
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self._temporary_directory = None
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self._hw_virtualization = False
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self._ubridge_hypervisor = None
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self._closed = False
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self._node_status = "stopped"
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self._command_line = ""
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self._allocate_aux = allocate_aux
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if self._console is not None:
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if console_type == "vnc":
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self._console = self._manager.port_manager.reserve_tcp_port(self._console, self._project, port_range_start=5900, port_range_end=6000)
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else:
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self._console = self._manager.port_manager.reserve_tcp_port(self._console, self._project)
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# We need to allocate aux before giving a random console port
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if self._aux is not None:
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self._aux = self._manager.port_manager.reserve_tcp_port(self._aux, self._project)
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if self._console is None:
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if console_type == "vnc":
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# VNC is a special case and the range must be 5900-6000
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self._console = self._manager.port_manager.get_free_tcp_port(self._project, port_range_start=5900, port_range_end=6000)
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else:
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self._console = self._manager.port_manager.get_free_tcp_port(self._project)
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if self._aux is None and allocate_aux:
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self._aux = self._manager.port_manager.get_free_tcp_port(self._project)
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log.debug("{module}: {name} [{id}] initialized. Console port {console}".format(module=self.manager.module_name,
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name=self.name,
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id=self.id,
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console=self._console))
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def __del__(self):
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if self._temporary_directory is not None:
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if os.path.exists(self._temporary_directory):
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shutil.rmtree(self._temporary_directory, ignore_errors=True)
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@property
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def status(self):
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"""Return current node status"""
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return self._node_status
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@status.setter
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def status(self, status):
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self._node_status = status
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self.updated()
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def updated(self):
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"""
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Send a updated event
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"""
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self.project.emit("node.updated", self)
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@property
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def command_line(self):
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"""Return command used to start the node"""
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return self._command_line
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@command_line.setter
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def command_line(self, command_line):
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self._command_line = command_line
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@property
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def project(self):
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"""
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Returns the node current project.
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:returns: Project instance.
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"""
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return self._project
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@property
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def name(self):
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"""
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Returns the name for this node.
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:returns: name
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"""
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return self._name
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@name.setter
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def name(self, new_name):
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"""
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Sets the name of this node.
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:param new_name: name
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"""
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log.info("{module}: {name} [{id}] renamed to {new_name}".format(module=self.manager.module_name,
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name=self.name,
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id=self.id,
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new_name=new_name))
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self._name = new_name
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@property
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def usage(self):
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"""
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Returns the usage for this node.
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:returns: usage
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"""
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return self._usage
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@usage.setter
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def usage(self, new_usage):
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"""
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Sets the usage of this node.
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:param new_usage: usage
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"""
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self._usage = new_usage
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@property
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def id(self):
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"""
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Returns the ID for this node.
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:returns: Node identifier (string)
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"""
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return self._id
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@property
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def manager(self):
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"""
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Returns the manager for this node.
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:returns: instance of manager
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"""
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return self._manager
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@property
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def working_dir(self):
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"""
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Return the node working directory
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"""
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return self._project.node_working_directory(self)
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@property
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def temporary_directory(self):
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if self._temporary_directory is None:
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try:
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self._temporary_directory = tempfile.mkdtemp()
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except OSError as e:
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raise NodeError("Can't create temporary directory: {}".format(e))
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return self._temporary_directory
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def create(self):
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"""
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Creates the node.
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"""
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log.info("{module}: {name} [{id}] created".format(module=self.manager.module_name,
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name=self.name,
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id=self.id))
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@asyncio.coroutine
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def delete(self):
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"""
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Delete the node (including all its files).
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"""
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def set_rw(operation, name, exc):
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os.chmod(name, stat.S_IWRITE)
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directory = self.project.node_working_directory(self)
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if os.path.exists(directory):
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try:
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yield from wait_run_in_executor(shutil.rmtree, directory, onerror=set_rw)
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except OSError as e:
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raise aiohttp.web.HTTPInternalServerError(text="Could not delete the node working directory: {}".format(e))
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def start(self):
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"""
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Starts the node process.
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"""
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raise NotImplementedError
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def stop(self):
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"""
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Starts the node process.
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"""
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raise NotImplementedError
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def suspend(self):
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"""
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Suspends the node process.
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"""
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raise NotImplementedError
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@asyncio.coroutine
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def close(self):
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"""
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Close the node process.
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"""
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if self._closed:
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return False
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log.info("{module}: '{name}' [{id}]: is closing".format(
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module=self.manager.module_name,
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name=self.name,
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id=self.id))
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if self._console:
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self._manager.port_manager.release_tcp_port(self._console, self._project)
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self._console = None
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if self._aux:
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self._manager.port_manager.release_tcp_port(self._aux, self._project)
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self._aux = None
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self._closed = True
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return True
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@property
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def allocate_aux(self):
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"""
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:returns: Boolean allocate or not an aux console
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"""
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return self._allocate_aux
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@allocate_aux.setter
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def allocate_aux(self, allocate_aux):
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"""
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:returns: Boolean allocate or not an aux console
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"""
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self._allocate_aux = allocate_aux
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@property
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def aux(self):
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"""
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Returns the aux console port of this node.
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:returns: aux console port
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"""
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return self._aux
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@aux.setter
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def aux(self, aux):
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"""
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Changes the aux port
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:params aux: Console port (integer) or None to free the port
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"""
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if aux == self._aux:
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return
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if self._aux:
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self._manager.port_manager.release_tcp_port(self._aux, self._project)
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self._aux = None
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if aux is not None:
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self._aux = self._manager.port_manager.reserve_tcp_port(aux, self._project)
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log.info("{module}: '{name}' [{id}]: aux port set to {port}".format(module=self.manager.module_name,
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name=self.name,
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id=self.id,
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port=aux))
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@property
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def console(self):
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"""
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Returns the console port of this node.
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:returns: console port
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"""
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return self._console
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@console.setter
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def console(self, console):
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"""
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Changes the console port
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:params console: Console port (integer) or None to free the port
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"""
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if console == self._console:
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return
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if self._console_type == "vnc" and console is not None and console < 5900:
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raise NodeError("VNC console require a port superior or equal to 5900 currently it's {}".format(console))
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if self._console:
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self._manager.port_manager.release_tcp_port(self._console, self._project)
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self._console = None
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if console is not None:
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if self.console_type == "vnc":
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self._console = self._manager.port_manager.reserve_tcp_port(console, self._project, port_range_start=5900, port_range_end=6000)
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else:
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self._console = self._manager.port_manager.reserve_tcp_port(console, self._project)
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log.info("{module}: '{name}' [{id}]: console port set to {port}".format(module=self.manager.module_name,
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name=self.name,
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id=self.id,
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port=console))
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@property
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def console_type(self):
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"""
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Returns the console type for this node.
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:returns: console type (string)
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"""
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return self._console_type
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@console_type.setter
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def console_type(self, console_type):
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"""
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Sets the console type for this node.
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:param console_type: console type (string)
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"""
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if console_type != self._console_type:
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# get a new port if the console type change
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self._manager.port_manager.release_tcp_port(self._console, self._project)
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if console_type == "vnc":
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# VNC is a special case and the range must be 5900-6000
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self._console = self._manager.port_manager.get_free_tcp_port(self._project, 5900, 6000)
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else:
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self._console = self._manager.port_manager.get_free_tcp_port(self._project)
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self._console_type = console_type
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log.info("{module}: '{name}' [{id}]: console type set to {console_type}".format(module=self.manager.module_name,
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name=self.name,
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id=self.id,
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console_type=console_type))
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@property
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def ubridge_path(self):
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"""
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Returns the uBridge executable path.
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:returns: path to uBridge
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"""
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path = self._manager.config.get_section_config("Server").get("ubridge_path", "ubridge")
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if path == "ubridge":
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path = shutil.which("ubridge")
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if path is None or len(path) == 0:
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raise NodeError("uBridge is not installed")
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return path
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@asyncio.coroutine
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def _ubridge_send(self, command):
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"""
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Sends a command to uBridge hypervisor.
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:param command: command to send
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"""
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if not self._ubridge_hypervisor or not self._ubridge_hypervisor.is_running():
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raise NodeError("Cannot send command '{}': uBridge is not running".format(command))
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try:
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yield from self._ubridge_hypervisor.send(command)
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except UbridgeError as e:
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raise UbridgeError("{}: {}".format(e, self._ubridge_hypervisor.read_stdout()))
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@asyncio.coroutine
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def _start_ubridge(self):
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"""
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Starts uBridge (handles connections to and from this node).
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"""
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if not self._manager.has_privileged_access(self.ubridge_path):
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raise NodeError("uBridge requires root access or capability to interact with network adapters")
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server_config = self._manager.config.get_section_config("Server")
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server_host = server_config.get("host")
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self._ubridge_hypervisor = Hypervisor(self._project, self.ubridge_path, self.working_dir, server_host)
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log.info("Starting new uBridge hypervisor {}:{}".format(self._ubridge_hypervisor.host, self._ubridge_hypervisor.port))
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yield from self._ubridge_hypervisor.start()
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log.info("Hypervisor {}:{} has successfully started".format(self._ubridge_hypervisor.host, self._ubridge_hypervisor.port))
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yield from self._ubridge_hypervisor.connect()
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@asyncio.coroutine
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def _stop_ubridge(self):
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"""
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Stops uBridge.
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"""
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if self._ubridge_hypervisor and self._ubridge_hypervisor.is_running():
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yield from self._ubridge_hypervisor.stop()
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@property
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def hw_virtualization(self):
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"""
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Returns either the node is using hardware virtualization or not.
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:return: boolean
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"""
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return self._hw_virtualization
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def check_available_ram(self, requested_ram):
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"""
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Sends a warning notification if there is not enough RAM on the system to allocate requested RAM.
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:param requested_ram: requested amount of RAM in MB
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"""
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available_ram = int(psutil.virtual_memory().available / (1024 * 1024))
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percentage_left = psutil.virtual_memory().percent
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if requested_ram > available_ram:
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message = '"{}" requires {}MB of RAM to run but there is only {}MB - {}% of RAM left on "{}"'.format(self.name,
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requested_ram,
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available_ram,
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percentage_left,
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platform.node())
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self.project.emit("log.warning", {"message": message})
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