mirror of
https://github.com/GNS3/gns3-server
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404 lines
14 KiB
Python
404 lines
14 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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"""
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Docker container instance.
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"""
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import asyncio
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import shutil
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import psutil
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from docker.utils import create_host_config
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from gns3server.ubridge.hypervisor import Hypervisor
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from pkg_resources import parse_version
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from .docker_error import DockerError
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from ..base_vm import BaseVM
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from ..adapters.ethernet_adapter import EthernetAdapter
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from ..nios.nio_udp import NIOUDP
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import logging
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log = logging.getLogger(__name__)
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class Container(BaseVM):
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"""Docker container implementation.
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:param name: Docker container name
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:param vm_id: Docker VM identifier
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:param project: Project instance
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:param manager: Manager instance
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:param image: Docker image
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"""
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def __init__(self, name, vm_id, project, manager, image, startcmd=None):
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self._name = name
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self._id = vm_id
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self._project = project
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self._manager = manager
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self._image = image
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self._startcmd = startcmd
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self._veths = []
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self._ethernet_adapters = []
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self._ubridge_hypervisor = None
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self._temporary_directory = None
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self._hw_virtualization = False
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log.debug(
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"{module}: {name} [{image}] initialized.".format(
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module=self.manager.module_name,
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name=self.name,
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image=self._image))
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def __json__(self):
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return {
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"name": self._name,
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"vm_id": self._id,
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"cid": self._cid,
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"project_id": self._project.id,
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"image": self._image,
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}
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@property
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def veths(self):
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"""Returns Docker host veth interfaces."""
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return self._veths
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@asyncio.coroutine
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def _get_container_state(self):
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"""Returns the container state (e.g. running, paused etc.)
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:returns: state
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:rtype: str
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"""
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try:
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result = yield from self.manager.execute(
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"inspect_container", {"container": self._cid})
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result_dict = {state.lower(): value for state, value in result["State"].items()}
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for state, value in result_dict.items():
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if value is True:
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# a container can be both paused and running
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if state == "paused":
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return "paused"
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if state == "running":
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if "paused" in result_dict and result_dict["paused"] is True:
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return "paused"
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return state.lower()
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return 'exited'
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except Exception as err:
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raise DockerError("Could not get container state for {0}: ".format(
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self._name), str(err))
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@asyncio.coroutine
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def create(self):
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"""Creates the Docker container."""
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params = {
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"name": self._name,
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"image": self._image,
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"network_disabled": True,
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"host_config": create_host_config(
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privileged=True, cap_add=['ALL'])
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}
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if self._startcmd:
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params.update({'command': self._startcmd})
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result = yield from self.manager.execute("create_container", params)
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self._cid = result['Id']
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log.info("Docker container '{name}' [{id}] created".format(
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name=self._name, id=self._id))
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return True
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@property
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def ubridge_path(self):
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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(
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"ubridge_path", "ubridge")
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if path == "ubridge":
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path = shutil.which("ubridge")
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return path
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@asyncio.coroutine
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def _start_ubridge(self):
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"""Starts uBridge (handles connections to and from this Docker VM)."""
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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(
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self._project, self.ubridge_path, self.working_dir, server_host)
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log.info("Starting new uBridge hypervisor {}:{}".format(
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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(
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self._ubridge_hypervisor.host, self._ubridge_hypervisor.port))
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yield from self._ubridge_hypervisor.connect()
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if parse_version(
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self._ubridge_hypervisor.version) < parse_version('0.9.1'):
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raise DockerError(
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"uBridge version must be >= 0.9.1, detected version is {}".format(
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self._ubridge_hypervisor.version))
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@asyncio.coroutine
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def start(self):
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"""Starts this Docker container."""
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state = yield from self._get_container_state()
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if state == "paused":
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yield from self.unpause()
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else:
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result = yield from self.manager.execute(
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"start", {"container": self._cid})
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yield from self._start_ubridge()
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for adapter_number in range(0, self.adapters):
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nio = self._ethernet_adapters[adapter_number].get_nio(0)
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if nio:
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yield from self._add_ubridge_connection(nio, adapter_number)
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log.info("Docker container '{name}' [{image}] started".format(
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name=self._name, image=self._image))
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def is_running(self):
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"""Checks if the container is running.
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:returns: True or False
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:rtype: bool
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"""
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state = yield from self._get_container_state()
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if state == "running":
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return True
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return False
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@asyncio.coroutine
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def restart(self):
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"""Restarts this Docker container."""
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result = yield from self.manager.execute(
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"restart", {"container": self._cid})
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log.info("Docker container '{name}' [{image}] restarted".format(
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name=self._name, image=self._image))
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@asyncio.coroutine
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def stop(self):
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"""Stops this Docker container."""
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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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state = yield from self._get_container_state()
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if state == "paused":
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yield from self.unpause()
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result = yield from self.manager.execute(
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"kill", {"container": self._cid})
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log.info("Docker container '{name}' [{image}] stopped".format(
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name=self._name, image=self._image))
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@asyncio.coroutine
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def pause(self):
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"""Pauses this Docker container."""
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result = yield from self.manager.execute(
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"pause", {"container": self._cid})
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log.info("Docker container '{name}' [{image}] paused".format(
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name=self._name, image=self._image))
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@asyncio.coroutine
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def unpause(self):
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"""Unpauses this Docker container."""
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result = yield from self.manager.execute(
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"unpause", {"container": self._cid})
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state = yield from self._get_container_state()
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log.info("Docker container '{name}' [{image}] unpaused".format(
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name=self._name, image=self._image))
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@asyncio.coroutine
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def remove(self):
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"""Removes this Docker container."""
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state = yield from self._get_container_state()
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if state == "paused":
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yield from self.unpause()
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if state == "running":
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yield from self.stop()
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result = yield from self.manager.execute(
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"remove_container", {"container": self._cid, "force": True})
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log.info("Docker container '{name}' [{image}] removed".format(
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name=self._name, image=self._image))
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@asyncio.coroutine
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def close(self):
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"""Closes this Docker container."""
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log.debug("Docker container '{name}' [{id}] is closing".format(
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name=self.name, id=self._cid))
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for adapter in self._ethernet_adapters.values():
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if adapter is not None:
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for nio in adapter.ports.values():
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if nio and isinstance(nio, NIOUDP):
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self.manager.port_manager.release_udp_port(
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nio.lport, self._project)
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yield from self.remove()
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log.info("Docker container '{name}' [{id}] closed".format(
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name=self.name, id=self._cid))
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self._closed = True
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def _add_ubridge_connection(self, nio, adapter_number):
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"""
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Creates a connection in uBridge.
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:param nio: NIO instance
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:param adapter_number: adapter number
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"""
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try:
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adapter = self._ethernet_adapters[adapter_number]
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except IndexError:
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raise DockerError(
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"Adapter {adapter_number} doesn't exist on Docker container '{name}'".format(
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name=self.name, adapter_number=adapter_number))
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if nio and isinstance(nio, NIOUDP):
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for index in range(128):
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if "gns3-veth{}ext".format(index) not in psutil.net_if_addrs():
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adapter.ifc = "eth{}".format(str(index))
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adapter.host_ifc = "gns3-veth{}ext".format(str(index))
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adapter.guest_ifc = "gns3-veth{}int".format(str(index))
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break
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if not hasattr(adapter, "ifc"):
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raise DockerError(
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"Adapter {adapter_number} couldn't allocate interface on Docker container '{name}'".format(
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name=self.name, adapter_number=adapter_number))
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yield from self._ubridge_hypervisor.send(
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'docker create_veth {hostif} {guestif}'.format(
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guestif=adapter.guest_ifc, hostif=adapter.host_ifc))
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self._veths.append(adapter.host_ifc)
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namespace = yield from self.get_namespace()
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yield from self._ubridge_hypervisor.send(
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'docker move_to_ns {ifc} {ns}'.format(
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ifc=adapter.guest_ifc, ns=namespace))
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yield from self._ubridge_hypervisor.send(
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'bridge create bridge{}'.format(adapter_number))
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yield from self._ubridge_hypervisor.send(
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'bridge add_nio_linux_raw bridge{adapter} {ifc}'.format(
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ifc=adapter.host_ifc, adapter=adapter_number))
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if isinstance(nio, NIOUDP):
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yield from self._ubridge_hypervisor.send(
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'bridge add_nio_udp bridge{adapter} {lport} {rhost} {rport}'.format(
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adapter=adapter_number, lport=nio.lport, rhost=nio.rhost,
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rport=nio.rport))
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if nio.capturing:
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yield from self._ubridge_hypervisor.send(
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'bridge start_capture bridge{adapter} "{pcap_file}"'.format(
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adapter=adapter_number, pcap_file=nio.pcap_output_file))
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yield from self._ubridge_hypervisor.send(
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'bridge start bridge{adapter}'.format(adapter=adapter_number))
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def _delete_ubridge_connection(self, adapter_number):
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"""Deletes a connection in uBridge.
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:param adapter_number: adapter number
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"""
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yield from self._ubridge_hypervisor.send("bridge delete bridge{name}".format(
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name=adapter_number))
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adapter = self._ethernet_adapters[adapter_number]
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yield from self._ubridge_hypervisor.send("docker delete_veth {name}".format(
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name=adapter.host_ifc))
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def adapter_add_nio_binding(self, adapter_number, nio):
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"""Adds an adapter NIO binding.
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:param adapter_number: adapter number
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:param nio: NIO instance to add to the slot/port
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"""
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try:
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adapter = self._ethernet_adapters[adapter_number]
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except IndexError:
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raise DockerError(
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"Adapter {adapter_number} doesn't exist on Docker container '{name}'".format(
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name=self.name, adapter_number=adapter_number))
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adapter.add_nio(0, nio)
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log.info(
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"Docker container '{name}' [{id}]: {nio} added to adapter {adapter_number}".format(
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name=self.name,
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id=self._id,
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nio=nio,
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adapter_number=adapter_number))
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def adapter_remove_nio_binding(self, adapter_number):
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"""
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Removes an adapter NIO binding.
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:param adapter_number: adapter number
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:returns: NIO instance
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"""
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try:
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adapter = self._ethernet_adapters[adapter_number]
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except IndexError:
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raise DockerError(
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"Adapter {adapter_number} doesn't exist on Docker VM '{name}'".format(
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name=self.name, adapter_number=adapter_number))
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adapter.remove_nio(0)
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try:
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yield from self._delete_ubridge_connection(adapter_number)
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except:
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pass
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log.info(
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"Docker VM '{name}' [{id}]: {nio} removed from adapter {adapter_number}".format(
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name=self.name, id=self.id, nio=adapter.host_ifc,
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adapter_number=adapter_number))
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@property
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def adapters(self):
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"""Returns the number of Ethernet adapters for this Docker VM.
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:returns: number of adapters
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:rtype: int
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"""
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return len(self._ethernet_adapters)
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@adapters.setter
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def adapters(self, adapters):
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"""Sets the number of Ethernet adapters for this Docker container.
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:param adapters: number of adapters
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"""
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self._ethernet_adapters.clear()
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for adapter_number in range(0, adapters):
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self._ethernet_adapters.append(EthernetAdapter())
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log.info(
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'Docker container "{name}" [{id}]: number of Ethernet adapters changed to {adapters}'.format(
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name=self._name,
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id=self._id,
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adapters=adapters))
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def get_namespace(self):
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result = yield from self.manager.execute(
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"inspect_container", {"container": self._cid})
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return int(result['State']['Pid'])
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