mirror of
https://github.com/GNS3/gns3-server.git
synced 2024-12-30 01:28:56 +00:00
669 lines
24 KiB
Python
669 lines
24 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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import shlex
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import aiohttp
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import json
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import os
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from ...ubridge.hypervisor import Hypervisor
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from .docker_error import *
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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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from ...utils.asyncio.telnet_server import AsyncioTelnetServer
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from ...ubridge.ubridge_error import UbridgeError, UbridgeNamespaceError
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import logging
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log = logging.getLogger(__name__)
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class DockerVM(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, console=None, start_command=None, adapters=None, environment=None):
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super().__init__(name, vm_id, project, manager, console=console)
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self._image = image
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self._start_command = start_command
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self._environment = environment
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self._cid = None
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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._telnet_server = None
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self._closed = False
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if adapters is None:
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self.adapters = 1
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else:
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self.adapters = adapters
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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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"container_id": self._cid,
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"project_id": self._project.id,
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"image": self._image,
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"adapters": self.adapters,
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"console": self.console,
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"start_command": self.start_command,
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"environment": self.environment,
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"vm_directory": self.working_dir
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}
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@property
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def start_command(self):
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return self._start_command
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@start_command.setter
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def start_command(self, command):
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command = command.strip()
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if len(command) == 0:
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self._start_command = None
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else:
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self._start_command = command
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@property
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def environment(self):
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return self._environment
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@environment.setter
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def environment(self, command):
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self._environment = command
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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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result = yield from self.manager.query("GET", "containers/{}/json".format(self._cid))
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if result["State"]["Paused"]:
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return "paused"
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if result["State"]["Running"]:
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return "running"
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return "exited"
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@asyncio.coroutine
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def _get_image_informations(self):
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"""
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:returns: Dictionnary informations about the container image
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"""
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result = yield from self.manager.query("GET", "images/{}/json".format(self._image))
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return result
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def _mount_binds(self, image_infos):
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"""
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:returns: Return the path that we need to map to local folders
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"""
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binds = []
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volumes = image_infos.get("ContainerConfig", {}).get("Volumes")
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if volumes is None:
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return binds
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for volume in volumes.keys():
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source = os.path.join(self.working_dir, os.path.relpath(volume, "/"))
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os.makedirs(source, exist_ok=True)
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binds.append("{}:{}".format(source, volume))
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return binds
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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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try:
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image_infos = yield from self._get_image_informations()
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except DockerHttp404Error:
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log.info("Image %s is missing pulling it from docker hub", self._image)
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yield from self.pull_image(self._image)
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image_infos = yield from self._get_image_informations()
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params = {
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"Hostname": self._name,
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"Name": self._name,
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"Image": self._image,
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"NetworkDisabled": True,
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"Tty": True,
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"OpenStdin": True,
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"StdinOnce": False,
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"HostConfig": {
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"CapAdd": ["ALL"],
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"Privileged": True,
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"Binds": self._mount_binds(image_infos)
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},
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"Volumes": {}
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}
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if self._start_command:
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params.update({"Cmd": shlex.split(self._start_command)})
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if self._environment:
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params.update({"Env": [e.strip() for e in self._environment.split("\n")]})
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result = yield from self.manager.query("POST", "containers/create", data=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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@asyncio.coroutine
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def update(self):
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"""
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Destroy an recreate the container with the new settings
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"""
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# We need to save the console and state and restore it
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console = self.console
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state = yield from self._get_container_state()
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yield from self.remove()
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yield from self.create()
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self.console = console
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if state == "running":
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yield from self.start()
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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.query("POST", "containers/{}/start".format(self._cid))
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namespace = yield from self._get_namespace()
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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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with (yield from self.manager.ubridge_lock):
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try:
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yield from self._add_ubridge_connection(nio, adapter_number, namespace)
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except UbridgeNamespaceError:
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yield from self.stop()
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# The container can crash soon after the start this mean we can not move the interface to the container namespace
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logdata = yield from self._get_log()
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for line in logdata.split('\n'):
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log.error(line)
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raise DockerError(logdata)
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yield from self._start_console()
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self.status = "started"
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log.info("Docker container '{name}' [{image}] started listen for telnet on {console}".format(name=self._name, image=self._image, console=self._console))
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@asyncio.coroutine
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def _start_console(self):
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"""
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Start streaming the console via telnet
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"""
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class InputStream:
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def __init__(self):
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self._data = b""
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def write(self, data):
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self._data += data
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@asyncio.coroutine
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def drain(self):
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if not self.ws.closed:
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self.ws.send_bytes(self._data)
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self._data = b""
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output_stream = asyncio.StreamReader()
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input_stream = InputStream()
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telnet = AsyncioTelnetServer(reader=output_stream, writer=input_stream)
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self._telnet_server = yield from asyncio.start_server(telnet.run, self._manager.port_manager.console_host, self._console)
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ws = yield from self.manager.websocket_query("containers/{}/attach/ws?stream=1&stdin=1&stdout=1&stderr=1".format(self._cid))
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input_stream.ws = ws
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output_stream.feed_data(self.name.encode() + b" console is now available... Press RETURN to get started.\r\n")
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asyncio.async(self._read_console_output(ws, output_stream))
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@asyncio.coroutine
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def _read_console_output(self, ws, out):
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"""
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Read websocket and forward it to the telnet
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:params ws: Websocket connection
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:param out: Output stream
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"""
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while True:
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msg = yield from ws.receive()
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if msg.tp == aiohttp.MsgType.text:
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out.feed_data(msg.data.encode())
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else:
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out.feed_eof()
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ws.close()
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break
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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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"""Restart this Docker container."""
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yield from self.manager.query("POST", "containers/{}/restart".format(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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try:
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if self._telnet_server:
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self._telnet_server.close()
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yield from self._telnet_server.wait_closed()
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self._telnet_server = None
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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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# t=5 number of seconds to wait before killing the container
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try:
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yield from self.manager.query("POST", "containers/{}/stop".format(self._cid), params={"t": 5})
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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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except DockerHttp304Error:
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# Container is already stopped
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pass
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# Ignore runtime error because when closing the server
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except RuntimeError as e:
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log.debug("Docker runtime error when closing: {}".format(str(e)))
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return
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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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yield from self.manager.query("POST", "containers/{}/pause".format(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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self.status = "paused"
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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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yield from self.manager.query("POST", "containers/{}/unpause".format(self._cid))
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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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self.status = "started"
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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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try:
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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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yield from self.manager.query("DELETE", "containers/{}".format(self._cid), params={"force": 1})
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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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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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for adapter in self._ethernet_adapters:
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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(nio.lport, self._project)
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# Ignore runtime error because when closing the server
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except (DockerHttp404Error, RuntimeError) as e:
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log.debug("Docker error when closing: {}".format(str(e)))
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return
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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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if self._closed:
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return
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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:
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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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@asyncio.coroutine
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def _add_ubridge_connection(self, nio, adapter_number, namespace):
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"""
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Creates a connection in uBridge.
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:param nio: NIO instance or None if it's a dummu interface (if an interface is missing in ubridge you can't see it via ifconfig in the container)
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:param adapter_number: adapter number
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:param namespace: Container namespace (pid)
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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(name=self.name, adapter_number=adapter_number))
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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}'. Too many Docker interfaces already exists".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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log.debug("Move container %s adapter %s to namespace %s", self.name, adapter.guest_ifc, namespace)
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try:
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yield from self._ubridge_hypervisor.send(
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'docker move_to_ns {ifc} {ns} eth{adapter}'.format(
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ifc=adapter.guest_ifc, ns=namespace, adapter=adapter_number))
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except UbridgeError as e:
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raise UbridgeNamespaceError(e)
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if isinstance(nio, NIOUDP):
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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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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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if not self._ubridge_hypervisor:
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return
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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 {hostif}'.format(hostif=adapter.host_ifc))
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@asyncio.coroutine
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def _get_namespace(self):
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result = yield from self.manager.query("GET", "containers/{}/json".format(self._cid))
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return int(result['State']['Pid'])
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@asyncio.coroutine
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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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@asyncio.coroutine
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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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yield from self._delete_ubridge_connection(adapter_number)
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log.info(
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"Docker VM '{name}' [{id}]: {nio} removed from adapter {adapter_number}".format(
|
|
name=self.name, id=self.id, nio=adapter.host_ifc,
|
|
adapter_number=adapter_number))
|
|
|
|
@property
|
|
def adapters(self):
|
|
"""Returns the number of Ethernet adapters for this Docker VM.
|
|
|
|
:returns: number of adapters
|
|
:rtype: int
|
|
"""
|
|
return len(self._ethernet_adapters)
|
|
|
|
@adapters.setter
|
|
def adapters(self, adapters):
|
|
"""Sets the number of Ethernet adapters for this Docker container.
|
|
|
|
:param adapters: number of adapters
|
|
"""
|
|
|
|
self._ethernet_adapters.clear()
|
|
for adapter_number in range(0, adapters):
|
|
self._ethernet_adapters.append(EthernetAdapter())
|
|
|
|
log.info(
|
|
'Docker container "{name}" [{id}]: number of Ethernet adapters changed to {adapters}'.format(
|
|
name=self._name,
|
|
id=self._id,
|
|
adapters=adapters))
|
|
|
|
@asyncio.coroutine
|
|
def pull_image(self, image):
|
|
"""
|
|
Pull image from docker repository
|
|
"""
|
|
log.info("Pull %s from docker hub", image)
|
|
response = yield from self.manager.http_query("POST", "images/create", params={"fromImage": image})
|
|
# The pull api will stream status via an HTTP JSON stream
|
|
content = ""
|
|
while True:
|
|
chunk = yield from response.content.read(1024)
|
|
if not chunk:
|
|
break
|
|
content += chunk.decode("utf-8")
|
|
|
|
try:
|
|
while True:
|
|
content = content.lstrip(" \r\n\t")
|
|
answer, index = json.JSONDecoder().raw_decode(content)
|
|
if "progress" in answer:
|
|
self.project.emit("log.info", {"message": "Pulling image {}:{}: {}".format(self._image, answer["id"], answer["progress"])})
|
|
content = content[index:]
|
|
except ValueError: # Partial JSON
|
|
pass
|
|
self.project.emit("log.info", {"message": "Success pulling image {}".format(self._image)})
|
|
|
|
@asyncio.coroutine
|
|
def _start_ubridge_capture(self, adapter_number, output_file):
|
|
"""
|
|
Start a packet capture in uBridge.
|
|
|
|
:param adapter_number: adapter number
|
|
:param output_file: PCAP destination file for the capture
|
|
"""
|
|
|
|
adapter = "bridge{}".format(adapter_number)
|
|
if not self._ubridge_hypervisor:
|
|
raise VMwareError("Cannot start the packet capture: uBridge is not running")
|
|
yield from self._ubridge_hypervisor.send('bridge start_capture {name} "{output_file}"'.format(name=adapter, output_file=output_file))
|
|
|
|
@asyncio.coroutine
|
|
def _stop_ubridge_capture(self, adapter_number):
|
|
"""
|
|
Stop a packet capture in uBridge.
|
|
|
|
:param adapter_number: adapter number
|
|
"""
|
|
|
|
adapter = "bridge{}".format(adapter_number)
|
|
if not self._ubridge_hypervisor:
|
|
raise VMwareError("Cannot stop the packet capture: uBridge is not running")
|
|
yield from self._ubridge_hypervisor.send("bridge stop_capture {name}".format(name=adapter))
|
|
|
|
@asyncio.coroutine
|
|
def start_capture(self, adapter_number, output_file):
|
|
"""
|
|
Starts a packet capture.
|
|
|
|
:param adapter_number: adapter number
|
|
:param output_file: PCAP destination file for the capture
|
|
"""
|
|
|
|
try:
|
|
adapter = self._ethernet_adapters[adapter_number]
|
|
except KeyError:
|
|
raise DockerError("Adapter {adapter_number} doesn't exist on Docker VM '{name}'".format(name=self.name,
|
|
adapter_number=adapter_number))
|
|
|
|
nio = adapter.get_nio(0)
|
|
|
|
if not nio:
|
|
raise DockerError("Adapter {} is not connected".format(adapter_number))
|
|
|
|
if nio.capturing:
|
|
raise DockerError("Packet capture is already activated on adapter {adapter_number}".format(adapter_number=adapter_number))
|
|
|
|
nio.startPacketCapture(output_file)
|
|
|
|
if self.status == "started":
|
|
yield from self._start_ubridge_capture(adapter_number, output_file)
|
|
|
|
log.info("Docker VM '{name}' [{id}]: starting packet capture on adapter {adapter_number}".format(name=self.name,
|
|
id=self.id,
|
|
adapter_number=adapter_number))
|
|
|
|
def stop_capture(self, adapter_number):
|
|
"""
|
|
Stops a packet capture.
|
|
|
|
:param adapter_number: adapter number
|
|
"""
|
|
|
|
try:
|
|
adapter = self._ethernet_adapters[adapter_number]
|
|
except KeyError:
|
|
raise DockerError("Adapter {adapter_number} doesn't exist on Docker VM '{name}'".format(name=self.name,
|
|
adapter_number=adapter_number))
|
|
|
|
nio = adapter.get_nio(0)
|
|
|
|
if not nio:
|
|
raise DockerError("Adapter {} is not connected".format(adapter_number))
|
|
|
|
nio.stopPacketCapture()
|
|
|
|
if self.status == "started":
|
|
yield from self._stop_ubridge_capture(adapter_number)
|
|
|
|
log.info("Docker VM '{name}' [{id}]: stopping packet capture on adapter {adapter_number}".format(name=self.name,
|
|
id=self.id,
|
|
adapter_number=adapter_number))
|
|
|
|
@asyncio.coroutine
|
|
def _get_log(self):
|
|
"""
|
|
Return the log from the container
|
|
|
|
:returns: string
|
|
"""
|
|
|
|
result = yield from self.manager.query("GET", "containers/{}/logs".format(self._cid), params={"stderr": 1, "stdout": 1})
|
|
return result
|