mirror of
https://github.com/GNS3/gns3-server.git
synced 2024-11-17 17:24:51 +02:00
649 lines
21 KiB
Python
649 lines
21 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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Manages Dynamips hypervisors (load-balancing etc.)
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"""
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from .hypervisor import Hypervisor
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from .dynamips_error import DynamipsError
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from ..attic import find_unused_port
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from ..attic import wait_socket_is_ready
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from pkg_resources import parse_version
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import os
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import time
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import logging
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log = logging.getLogger(__name__)
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class HypervisorManager(object):
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"""
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Manages Dynamips hypervisors.
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:param path: path to the Dynamips executable
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:param working_dir: path to a working directory
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:param host: host/address for hypervisors to listen to
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"""
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def __init__(self, path, working_dir, host='127.0.0.1'):
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self._hypervisors = []
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self._path = path
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self._working_dir = working_dir
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self._host = host
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self._hypervisor_start_port_range = 7200
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self._hypervisor_end_port_range = 7700
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self._console_start_port_range = 2001
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self._console_end_port_range = 2500
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self._aux_start_port_range = 2501
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self._aux_end_port_range = 3000
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self._udp_start_port_range = 10001
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self._udp_end_port_range = 20000
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self._ghost_ios_support = True
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self._mmap_support = True
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self._jit_sharing_support = False
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self._sparse_memory_support = True
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self._allocate_hypervisor_per_device = True
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self._memory_usage_limit_per_hypervisor = 1024
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self._allocate_hypervisor_per_ios_image = True
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def __del__(self):
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"""
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Shutdowns all started hypervisors
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"""
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self.stop_all_hypervisors()
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@property
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def hypervisors(self):
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"""
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Returns all hypervisor instances.
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:returns: list of hypervisor instances
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"""
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return self._hypervisors
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@property
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def path(self):
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"""
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Returns the Dynamips path.
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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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Set a new Dynamips path.
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:param path: path to Dynamips
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"""
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self._path = path
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log.info("Dynamips path set to {}".format(self._path))
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@property
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def working_dir(self):
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"""
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Returns the Dynamips working directory path.
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:returns: path to Dynamips working directory
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"""
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return self._working_dir
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@working_dir.setter
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def working_dir(self, working_dir):
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"""
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Sets a new path to the Dynamips working directory.
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:param working_dir: path to Dynamips working directory
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"""
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self._working_dir = os.path.join(working_dir, "dynamips")
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log.info("working directory set to {}".format(self._working_dir))
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# update all existing hypervisors with the new working directory
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for hypervisor in self._hypervisors:
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hypervisor.working_dir = self._working_dir
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@property
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def hypervisor_start_port_range(self):
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"""
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Returns the hypervisor start port range value
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:returns: hypervisor start port range value (integer)
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"""
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return self._hypervisor_start_port_range
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@hypervisor_start_port_range.setter
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def hypervisor_start_port_range(self, hypervisor_start_port_range):
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"""
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Sets a new hypervisor start port range value
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:param hypervisor_start_port_range: hypervisor start port range value (integer)
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"""
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if self._hypervisor_start_port_range != hypervisor_start_port_range:
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self._hypervisor_start_port_range = hypervisor_start_port_range
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log.info("hypervisor start port range value set to {}".format(self._hypervisor_start_port_range))
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@property
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def hypervisor_end_port_range(self):
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"""
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Returns the hypervisor end port range value
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:returns: hypervisor end port range value (integer)
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"""
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return self._hypervisor_end_port_range
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@hypervisor_end_port_range.setter
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def hypervisor_end_port_range(self, hypervisor_end_port_range):
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"""
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Sets a new hypervisor end port range value
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:param hypervisor_end_port_range: hypervisor end port range value (integer)
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"""
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if self._hypervisor_end_port_range != hypervisor_end_port_range:
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self._hypervisor_end_port_range = hypervisor_end_port_range
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log.info("hypervisor end port range value set to {}".format(self._hypervisor_end_port_range))
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@property
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def console_start_port_range(self):
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"""
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Returns the console start port range value
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:returns: console start port range value (integer)
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"""
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return self._console_start_port_range
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@console_start_port_range.setter
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def console_start_port_range(self, console_start_port_range):
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"""
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Sets a new console start port range value
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:param console_start_port_range: console start port range value (integer)
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"""
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if self._console_start_port_range != console_start_port_range:
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self._console_start_port_range = console_start_port_range
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log.info("console start port range value set to {}".format(self._console_start_port_range))
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# update all existing hypervisors with the new value
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for hypervisor in self._hypervisors:
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hypervisor.console_start_port_range = console_start_port_range
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@property
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def console_end_port_range(self):
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"""
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Returns the console end port range value
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:returns: console end port range value (integer)
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"""
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return self._console_end_port_range
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@console_end_port_range.setter
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def console_end_port_range(self, console_end_port_range):
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"""
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Sets a new console end port range value
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:param console_end_port_range: console end port range value (integer)
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"""
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if self._console_end_port_range != console_end_port_range:
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self._console_end_port_range = console_end_port_range
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log.info("console end port range value set to {}".format(self._console_end_port_range))
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# update all existing hypervisors with the new value
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for hypervisor in self._hypervisors:
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hypervisor.console_end_port_range = console_end_port_range
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@property
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def aux_start_port_range(self):
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"""
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Returns the auxiliary console start port range value
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:returns: auxiliary console start port range value (integer)
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"""
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return self._aux_start_port_range
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@aux_start_port_range.setter
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def aux_start_port_range(self, aux_start_port_range):
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"""
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Sets a new auxiliary console start port range value
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:param aux_start_port_range: auxiliary console start port range value (integer)
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"""
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if self._aux_start_port_range != aux_start_port_range:
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self._aux_start_port_range = aux_start_port_range
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log.info("auxiliary console start port range value set to {}".format(self._aux_start_port_range))
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# update all existing hypervisors with the new value
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for hypervisor in self._hypervisors:
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hypervisor.aux_start_port_range = aux_start_port_range
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@property
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def aux_end_port_range(self):
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"""
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Returns the auxiliary console end port range value
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:returns: auxiliary console end port range value (integer)
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"""
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return self._aux_end_port_range
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@aux_end_port_range.setter
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def aux_end_port_range(self, aux_end_port_range):
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"""
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Sets a new auxiliary console end port range value
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:param aux_end_port_range: auxiliary console end port range value (integer)
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"""
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if self._aux_end_port_range != aux_end_port_range:
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self._aux_end_port_range = aux_end_port_range
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log.info("auxiliary console end port range value set to {}".format(self._aux_end_port_range))
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# update all existing hypervisors with the new value
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for hypervisor in self._hypervisors:
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hypervisor.aux_end_port_range = aux_end_port_range
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@property
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def udp_start_port_range(self):
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"""
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Returns the UDP start port range value
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:returns: UDP start port range value (integer)
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"""
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return self._udp_start_port_range
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@udp_start_port_range.setter
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def udp_start_port_range(self, udp_start_port_range):
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"""
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Sets a new UDP start port range value
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:param udp_start_port_range: UDP start port range value (integer)
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"""
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if self._udp_start_port_range != udp_start_port_range:
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self._udp_start_port_range = udp_start_port_range
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log.info("UDP start port range value set to {}".format(self._udp_start_port_range))
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# update all existing hypervisors with the new value
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for hypervisor in self._hypervisors:
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hypervisor.udp_start_port_range = udp_start_port_range
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@property
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def udp_end_port_range(self):
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"""
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Returns the UDP end port range value
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:returns: UDP end port range value (integer)
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"""
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return self._udp_end_port_range
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@udp_end_port_range.setter
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def udp_end_port_range(self, udp_end_port_range):
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"""
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Sets a new UDP end port range value
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:param udp_end_port_range: UDP end port range value (integer)
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"""
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if self._udp_end_port_range != udp_end_port_range:
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self._udp_end_port_range = udp_end_port_range
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log.info("UDP end port range value set to {}".format(self._udp_end_port_range))
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# update all existing hypervisors with the new value
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for hypervisor in self._hypervisors:
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hypervisor.udp_end_port_range = udp_end_port_range
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@property
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def ghost_ios_support(self):
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"""
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Returns either ghost IOS is activated or not.
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:returns: boolean
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"""
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return self._ghost_ios_support
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@ghost_ios_support.setter
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def ghost_ios_support(self, ghost_ios_support):
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"""
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Sets ghost IOS support.
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:param ghost_ios_support: boolean
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"""
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if self._ghost_ios_support != ghost_ios_support:
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self._ghost_ios_support = ghost_ios_support
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if ghost_ios_support:
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log.info("ghost IOS support enabled")
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else:
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log.info("ghost IOS support disabled")
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@property
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def mmap_support(self):
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"""
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Returns either mmap is activated or not.
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:returns: boolean
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"""
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return self._mmap_support
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@mmap_support.setter
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def mmap_support(self, mmap_support):
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"""
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Sets mmap support.
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:param mmap_support: boolean
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"""
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if self._mmap_support != mmap_support:
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self._mmap_support = mmap_support
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if mmap_support:
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log.info("mmap support enabled")
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else:
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log.info("mmap support disabled")
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@property
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def sparse_memory_support(self):
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"""
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Returns either sparse memory is activated or not.
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:returns: boolean
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"""
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return self._sparse_memory_support
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@sparse_memory_support.setter
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def sparse_memory_support(self, sparse_memory_support):
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"""
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Sets sparse memory support.
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:param sparse_memory_support: boolean
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"""
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if self._sparse_memory_support != sparse_memory_support:
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self._sparse_memory_support = sparse_memory_support
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if sparse_memory_support:
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log.info("sparse memory support enabled")
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else:
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log.info("sparse memory support disabled")
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@property
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def jit_sharing_support(self):
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"""
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Returns either JIT sharing is activated or not.
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:returns: boolean
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"""
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return self._jit_sharing_support
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@jit_sharing_support.setter
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def jit_sharing_support(self, jit_sharing_support):
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"""
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Sets JIT sharing support.
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:param jit_sharing_support: boolean
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"""
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if self._jit_sharing_support != jit_sharing_support:
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self._jit_sharing_support = jit_sharing_support
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if jit_sharing_support:
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log.info("JIT sharing support enabled")
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else:
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log.info("JIT sharing support disabled")
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@property
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def allocate_hypervisor_per_device(self):
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"""
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Returns either an hypervisor is created for each device.
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:returns: True or False
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"""
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return self._allocate_hypervisor_per_device
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@allocate_hypervisor_per_device.setter
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def allocate_hypervisor_per_device(self, value):
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"""
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Sets if an hypervisor is created for each device.
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:param value: True or False
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"""
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if self._allocate_hypervisor_per_device != value:
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self._allocate_hypervisor_per_device = value
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if value:
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log.info("allocating an hypervisor per device enabled")
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else:
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log.info("allocating an hypervisor per device disabled")
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@property
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def memory_usage_limit_per_hypervisor(self):
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"""
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Returns the memory usage limit per hypervisor
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:returns: limit value (integer)
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"""
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return self._memory_usage_limit_per_hypervisor
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@memory_usage_limit_per_hypervisor.setter
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def memory_usage_limit_per_hypervisor(self, memory_limit):
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"""
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Sets the memory usage limit per hypervisor
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:param memory_limit: memory limit value (integer)
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"""
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if self._memory_usage_limit_per_hypervisor != memory_limit:
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self._memory_usage_limit_per_hypervisor = memory_limit
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log.info("memory usage limit per hypervisor set to {}".format(memory_limit))
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@property
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def allocate_hypervisor_per_ios_image(self):
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"""
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Returns if router are grouped per hypervisor
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based on their IOS image.
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:returns: True or False
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"""
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return self._allocate_hypervisor_per_ios_image
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@allocate_hypervisor_per_ios_image.setter
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def allocate_hypervisor_per_ios_image(self, value):
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"""
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Sets if routers are grouped per hypervisor
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based on their IOS image.
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:param value: True or False
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"""
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if self._allocate_hypervisor_per_ios_image != value:
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self._allocate_hypervisor_per_ios_image = value
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if value:
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log.info("allocating an hypervisor per IOS image enabled")
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else:
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log.info("allocating an hypervisor per IOS image disabled")
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def wait_for_hypervisor(self, host, port):
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"""
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Waits for an hypervisor to be started (accepting a socket connection)
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:param host: host/address to connect to the hypervisor
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:param port: port to connect to the hypervisor
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"""
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begin = time.time()
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# wait for the socket for a maximum of 10 seconds.
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connection_success, last_exception = wait_socket_is_ready(host, port, wait=10.0)
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if not connection_success:
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# FIXME: throw exception here
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log.critical("Couldn't connect to hypervisor on {}:{} :{}".format(host, port,
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last_exception))
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else:
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log.info("Dynamips server ready after {:.4f} seconds".format(time.time() - begin))
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def start_new_hypervisor(self):
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"""
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Creates a new Dynamips process and start it.
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:returns: the new hypervisor instance
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"""
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try:
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port = find_unused_port(self._hypervisor_start_port_range, self._hypervisor_end_port_range, self._host)
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except Exception as e:
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raise DynamipsError(e)
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hypervisor = Hypervisor(self._path,
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self._working_dir,
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self._host,
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port)
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log.info("creating new hypervisor {}:{} with working directory {}".format(hypervisor.host, hypervisor.port, self._working_dir))
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hypervisor.start()
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self.wait_for_hypervisor(self._host, port)
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log.info("hypervisor {}:{} has successfully started".format(hypervisor.host, hypervisor.port))
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hypervisor.connect()
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if parse_version(hypervisor.version) < parse_version('0.2.11'):
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raise DynamipsError("Dynamips version must be >= 0.2.11, detected version is {}".format(hypervisor.version))
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hypervisor.console_start_port_range = self._console_start_port_range
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hypervisor.console_end_port_range = self._console_end_port_range
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hypervisor.aux_start_port_range = self._aux_start_port_range
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hypervisor.aux_end_port_range = self._aux_end_port_range
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hypervisor.udp_start_port_range = self._udp_start_port_range
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hypervisor.udp_end_port_range = self._udp_end_port_range
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self._hypervisors.append(hypervisor)
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return hypervisor
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def allocate_hypervisor_for_router(self, router_ios_image, router_ram):
|
|
"""
|
|
Allocates a Dynamips hypervisor for a specific router
|
|
(new or existing depending on the RAM amount and IOS image)
|
|
|
|
:param router_ios_image: IOS image name
|
|
:param router_ram: amount of RAM (integer)
|
|
|
|
:returns: the allocated hypervisor instance
|
|
"""
|
|
|
|
# allocate an hypervisor for each router by default
|
|
if not self._allocate_hypervisor_per_device:
|
|
for hypervisor in self._hypervisors:
|
|
if self._allocate_hypervisor_per_ios_image:
|
|
if not hypervisor.image_ref:
|
|
hypervisor.image_ref = router_ios_image
|
|
elif hypervisor.image_ref != router_ios_image:
|
|
continue
|
|
if (hypervisor.memory_load + router_ram) <= self._memory_usage_limit_per_hypervisor:
|
|
current_memory_load = hypervisor.memory_load
|
|
hypervisor.increase_memory_load(router_ram)
|
|
log.info("allocating existing hypervisor {}:{}, RAM={}+{}".format(hypervisor.host,
|
|
hypervisor.port,
|
|
current_memory_load,
|
|
router_ram))
|
|
return hypervisor
|
|
|
|
hypervisor = self.start_new_hypervisor()
|
|
hypervisor.image_ref = router_ios_image
|
|
hypervisor.increase_memory_load(router_ram)
|
|
return hypervisor
|
|
|
|
def unallocate_hypervisor_for_router(self, router):
|
|
"""
|
|
Unallocates a Dynamips hypervisor for a specific router.
|
|
|
|
:param router: Router instance
|
|
"""
|
|
|
|
hypervisor = router.hypervisor
|
|
hypervisor.decrease_memory_load(router.ram)
|
|
|
|
if hypervisor.memory_load < 0:
|
|
log.warn("hypervisor {}:{} has a memory load below 0 ({})".format(hypervisor.host,
|
|
hypervisor.port,
|
|
hypervisor.memory_load))
|
|
#hypervisor.memory_load = 0
|
|
|
|
# memory load at 0MB and no devices managed anymore...
|
|
# let's stop this hypervisor
|
|
if hypervisor.memory_load == 0 and not hypervisor.devices:
|
|
hypervisor.stop()
|
|
self._hypervisors.remove(hypervisor)
|
|
|
|
def allocate_hypervisor_for_simulated_device(self):
|
|
"""
|
|
Allocates a Dynamips hypervisor for a specific Dynamips simulated device.
|
|
|
|
:returns: the allocated hypervisor instance
|
|
"""
|
|
|
|
# For now always allocate the first hypervisor available,
|
|
# in the future we could randomly allocate.
|
|
|
|
if self._hypervisors:
|
|
return self._hypervisors[0]
|
|
|
|
# no hypervisor, let's start one!
|
|
return self.start_new_hypervisor()
|
|
|
|
def unallocate_hypervisor_for_simulated_device(self, device):
|
|
"""
|
|
Unallocates a Dynamips hypervisor for a specific Dynamips simulated device.
|
|
|
|
:param device: device instance
|
|
"""
|
|
|
|
hypervisor = device.hypervisor
|
|
if not hypervisor.devices:
|
|
hypervisor.stop()
|
|
self._hypervisors.remove(hypervisor)
|
|
|
|
def stop_all_hypervisors(self):
|
|
"""
|
|
Stops all hypervisors.
|
|
"""
|
|
|
|
for hypervisor in self._hypervisors:
|
|
hypervisor.stop()
|
|
self._hypervisors = []
|