mirror of
https://github.com/GNS3/gns3-server
synced 2024-11-25 09:48:09 +00:00
1187 lines
48 KiB
Python
1187 lines
48 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 sys
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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 subprocess
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import os
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import re
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from gns3server.utils.asyncio.telnet_server import AsyncioTelnetServer
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from gns3server.utils.asyncio.raw_command_server import AsyncioRawCommandServer
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from gns3server.utils.asyncio import wait_for_file_creation
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from gns3server.utils.asyncio import monitor_process
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from gns3server.utils.get_resource import get_resource
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from gns3server.compute.ubridge.ubridge_error import UbridgeError, UbridgeNamespaceError
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from ..base_node import BaseNode
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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 .docker_error import (
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DockerError,
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DockerHttp304Error,
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DockerHttp404Error
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)
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import logging
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log = logging.getLogger(__name__)
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class DockerVM(BaseNode):
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"""
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Docker container implementation.
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:param name: Docker container name
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:param node_id: Node 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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:param console: TCP console port
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:param console_type: console type
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:param aux: TCP aux console port
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:param aux_type: auxiliary console type
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:param console_resolution: Resolution of the VNC display
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:param console_http_port: Port to redirect HTTP queries
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:param console_http_path: Url part with the path of the web interface
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:param extra_hosts: Hosts which will be written into /etc/hosts into docker conainer
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:param extra_volumes: Additional directories to make persistent
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"""
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def __init__(self, name, node_id, project, manager, image, console=None, aux=None, start_command=None,
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adapters=None, environment=None, console_type="telnet", aux_type="none", console_resolution="1024x768",
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console_http_port=80, console_http_path="/", extra_hosts=None, extra_volumes=[], memory=0, cpus=0):
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super().__init__(name, node_id, project, manager, console=console, console_type=console_type, aux=aux, aux_type=aux_type)
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# force the latest image if no version is specified
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if ":" not in image:
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image = "{}:latest".format(image)
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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._temporary_directory = None
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self._telnet_servers = []
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self._xvfb_process = None
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self._vnc_process = None
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self._vncconfig_process = None
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self._console_resolution = console_resolution
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self._console_http_path = console_http_path
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self._console_http_port = console_http_port
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self._console_websocket = None
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self._extra_hosts = extra_hosts
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self._extra_volumes = extra_volumes or []
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self._memory = memory
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self._cpus = cpus
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self._permissions_fixed = False
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self._display = None
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self._closing = False
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self._volumes = []
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# Keep a list of created bridge
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self._bridges = set()
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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("{module}: {name} [{image}] initialized.".format(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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"usage": self.usage,
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"node_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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"console_type": self.console_type,
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"console_resolution": self.console_resolution,
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"console_http_port": self.console_http_port,
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"console_http_path": self.console_http_path,
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"aux": self.aux,
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"aux_type": self.aux_type,
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"start_command": self.start_command,
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"status": self.status,
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"environment": self.environment,
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"node_directory": self.working_path,
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"extra_hosts": self.extra_hosts,
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"extra_volumes": self.extra_volumes,
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"memory": self.memory,
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"cpus": self.cpus
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}
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def _get_free_display_port(self):
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"""
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Search a free display port
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"""
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display = 100
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if not os.path.exists("/tmp/.X11-unix/"):
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return display
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while True:
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if not os.path.exists("/tmp/.X11-unix/X{}".format(display)):
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return display
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display += 1
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@property
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def ethernet_adapters(self):
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return self._ethernet_adapters
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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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if command:
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command = command.strip()
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if command is None or 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 console_resolution(self):
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return self._console_resolution
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@console_resolution.setter
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def console_resolution(self, resolution):
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self._console_resolution = resolution
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@property
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def console_http_path(self):
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return self._console_http_path
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@console_http_path.setter
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def console_http_path(self, path):
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self._console_http_path = path
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@property
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def console_http_port(self):
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return self._console_http_port
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@console_http_port.setter
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def console_http_port(self, port):
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self._console_http_port = port
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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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@property
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def extra_hosts(self):
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return self._extra_hosts
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@extra_hosts.setter
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def extra_hosts(self, extra_hosts):
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self._extra_hosts = extra_hosts
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@property
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def extra_volumes(self):
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return self._extra_volumes
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@extra_volumes.setter
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def extra_volumes(self, extra_volumes):
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self._extra_volumes = extra_volumes
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@property
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def memory(self):
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return self._memory
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@memory.setter
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def memory(self, memory):
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self._memory = memory
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@property
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def cpus(self):
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return self._cpus
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@cpus.setter
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def cpus(self, cpus):
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self._cpus = cpus
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async def _get_container_state(self):
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"""
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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 = await self.manager.query("GET", "containers/{}/json".format(self._cid))
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except DockerError:
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return "exited"
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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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async def _get_image_information(self):
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"""
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:returns: Dictionary information about the container image
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"""
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result = await self.manager.query("GET", "images/{}/json".format(self._image))
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return result
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def _mount_binds(self, image_info):
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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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resources = get_resource("compute/docker/resources")
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if not os.path.exists(resources):
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raise DockerError("{} is missing can't start Docker containers".format(resources))
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binds = ["{}:/gns3:ro".format(resources)]
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# We mount our own etc/network
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try:
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self._create_network_config()
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except OSError as e:
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raise DockerError("Could not create network config in the container: {}".format(e))
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volumes = ["/etc/network"]
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volumes.extend((image_info.get("Config", {}).get("Volumes") or {}).keys())
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for volume in self._extra_volumes:
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if not volume.strip() or volume[0] != "/" or volume.find("..") >= 0:
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raise DockerError("Persistent volume '{}' has invalid format. It must start with a '/' and not contain '..'.".format(volume))
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volumes.extend(self._extra_volumes)
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self._volumes = []
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# define lambdas for validation checks
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nf = lambda x: re.sub(r"//+", "/", (x if x.endswith("/") else x + "/"))
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generalises = lambda v1, v2: nf(v2).startswith(nf(v1))
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for volume in volumes:
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# remove any mount that is equal or more specific, then append this one
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self._volumes = list(filter(lambda v: not generalises(volume, v), self._volumes))
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# if there is nothing more general, append this mount
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if not [ v for v in self._volumes if generalises(v, volume) ] :
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self._volumes.append(volume)
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for volume in self._volumes:
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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("{}:/gns3volumes{}".format(source, volume))
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return binds
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def _create_network_config(self):
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"""
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If network config is empty we create a sample config
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"""
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path = os.path.join(self.working_dir, "etc", "network")
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os.makedirs(path, exist_ok=True)
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open(os.path.join(path, ".gns3_perms"), 'a').close()
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os.makedirs(os.path.join(path, "if-up.d"), exist_ok=True)
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os.makedirs(os.path.join(path, "if-down.d"), exist_ok=True)
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os.makedirs(os.path.join(path, "if-pre-up.d"), exist_ok=True)
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os.makedirs(os.path.join(path, "if-post-down.d"), exist_ok=True)
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if not os.path.exists(os.path.join(path, "interfaces")):
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with open(os.path.join(path, "interfaces"), "w+") as f:
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f.write("""#
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# This is a sample network config uncomment lines to configure the network
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#
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""")
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for adapter in range(0, self.adapters):
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f.write("""
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# Static config for eth{adapter}
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#auto eth{adapter}
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#iface eth{adapter} inet static
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#\taddress 192.168.{adapter}.2
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#\tnetmask 255.255.255.0
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#\tgateway 192.168.{adapter}.1
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#\tup echo nameserver 192.168.{adapter}.1 > /etc/resolv.conf
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# DHCP config for eth{adapter}
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# auto eth{adapter}
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# iface eth{adapter} inet dhcp""".format(adapter=adapter))
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return path
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async def create(self):
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"""
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Creates the Docker container.
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"""
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try:
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image_infos = await self._get_image_information()
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except DockerHttp404Error:
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log.info("Image '{}' is missing, pulling it from Docker hub...".format(self._image))
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await self.pull_image(self._image)
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image_infos = await self._get_image_information()
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if image_infos is None:
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raise DockerError("Cannot get information for image '{}', please try again.".format(self._image))
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available_cpus = psutil.cpu_count(logical=True)
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if self._cpus > available_cpus:
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raise DockerError("You have allocated too many CPUs for the Docker container (max available is {} CPUs)".format(available_cpus))
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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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"Memory": self._memory * (1024 * 1024), # convert memory to bytes
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"NanoCpus": int(self._cpus * 1e9) # convert cpus to nano cpus
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},
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"Volumes": {},
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"Env": ["container=docker"], # Systemd compliant: https://github.com/GNS3/gns3-server/issues/573
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"Cmd": [],
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"Entrypoint": image_infos.get("Config", {"Entrypoint": []}).get("Entrypoint")
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}
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if params["Entrypoint"] is None:
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params["Entrypoint"] = []
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if self._start_command:
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try:
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params["Cmd"] = shlex.split(self._start_command)
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except ValueError as e:
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raise DockerError("Invalid start command '{}': {}".format(self._start_command, e))
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if len(params["Cmd"]) == 0:
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params["Cmd"] = image_infos.get("Config", {"Cmd": []}).get("Cmd")
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if params["Cmd"] is None:
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params["Cmd"] = []
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if len(params["Cmd"]) == 0 and len(params["Entrypoint"]) == 0:
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params["Cmd"] = ["/bin/sh"]
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params["Entrypoint"].insert(0, "/gns3/init.sh") # FIXME /gns3/init.sh is not found?
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# Give the information to the container on how many interface should be inside
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params["Env"].append("GNS3_MAX_ETHERNET=eth{}".format(self.adapters - 1))
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# Give the information to the container the list of volume path mounted
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params["Env"].append("GNS3_VOLUMES={}".format(":".join(self._volumes)))
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# Pass user configured for image to init script
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if image_infos.get("Config", {"User": ""}).get("User"):
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params["User"] = "root"
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params["Env"].append("GNS3_USER={}".format(image_infos.get("Config", {"User": ""})["User"]))
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variables = self.project.variables
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if not variables:
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variables = []
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for var in variables:
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formatted = self._format_env(variables, var.get('value', ''))
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params["Env"].append("{}={}".format(var["name"], formatted))
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if self._environment:
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for e in self._environment.strip().split("\n"):
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e = e.strip()
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if e.split("=")[0] == "":
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self.project.emit("log.warning", {"message": "{} has invalid environment variable: {}".format(self.name, e)})
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continue
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if not e.startswith("GNS3_"):
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formatted = self._format_env(variables, e)
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params["Env"].append(formatted)
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if self._console_type == "vnc":
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await self._start_vnc()
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params["Env"].append("QT_GRAPHICSSYSTEM=native") # To fix a Qt issue: https://github.com/GNS3/gns3-server/issues/556
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params["Env"].append("DISPLAY=:{}".format(self._display))
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params["HostConfig"]["Binds"].append("/tmp/.X11-unix/:/tmp/.X11-unix/")
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if self._extra_hosts:
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extra_hosts = self._format_extra_hosts(self._extra_hosts)
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if extra_hosts:
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params["Env"].append("GNS3_EXTRA_HOSTS={}".format(extra_hosts))
|
||
|
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result = await 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(name=self._name, id=self._id))
|
||
return True
|
||
|
||
def _format_env(self, variables, env):
|
||
for variable in variables:
|
||
env = env.replace('${' + variable["name"] + '}', variable.get("value", ""))
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||
return env
|
||
|
||
def _format_extra_hosts(self, extra_hosts):
|
||
lines = [h.strip() for h in self._extra_hosts.split("\n") if h.strip() != ""]
|
||
hosts = []
|
||
try:
|
||
for host in lines:
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||
hostname, ip = host.split(":")
|
||
hostname = hostname.strip()
|
||
ip = ip.strip()
|
||
if hostname and ip:
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||
hosts.append((hostname, ip))
|
||
except ValueError:
|
||
raise DockerError("Can't apply `ExtraHosts`, wrong format: {}".format(extra_hosts))
|
||
return "\n".join(["{}\t{}".format(h[1], h[0]) for h in hosts])
|
||
|
||
async def update(self):
|
||
"""
|
||
Destroy an recreate the container with the new settings
|
||
"""
|
||
|
||
# We need to save the console and state and restore it
|
||
console = self.console
|
||
aux = self.aux
|
||
state = await self._get_container_state()
|
||
|
||
# reset the docker container, but don't release the NIO UDP ports
|
||
await self.reset(False)
|
||
await self.create()
|
||
self.console = console
|
||
self.aux = aux
|
||
if state == "running":
|
||
await self.start()
|
||
|
||
async def start(self):
|
||
"""
|
||
Starts this Docker container.
|
||
"""
|
||
|
||
try:
|
||
state = await self._get_container_state()
|
||
except DockerHttp404Error:
|
||
raise DockerError("Docker container '{name}' with ID {cid} does not exist or is not ready yet. Please try again in a few seconds.".format(name=self.name,
|
||
cid=self._cid))
|
||
if state == "paused":
|
||
await self.unpause()
|
||
elif state == "running":
|
||
return
|
||
else:
|
||
|
||
if self._console_type == "vnc" and not self._vnc_process:
|
||
# restart the vnc process in case it had previously crashed
|
||
await self._start_vnc_process(restart=True)
|
||
monitor_process(self._vnc_process, self._vnc_callback)
|
||
|
||
await self._clean_servers()
|
||
|
||
await self.manager.query("POST", "containers/{}/start".format(self._cid))
|
||
self._namespace = await self._get_namespace()
|
||
|
||
await self._start_ubridge(require_privileged_access=True)
|
||
|
||
for adapter_number in range(0, self.adapters):
|
||
nio = self._ethernet_adapters[adapter_number].get_nio(0)
|
||
async with self.manager.ubridge_lock:
|
||
try:
|
||
await self._add_ubridge_connection(nio, adapter_number)
|
||
except UbridgeNamespaceError:
|
||
log.error("Container %s failed to start", self.name)
|
||
await self.stop()
|
||
|
||
# The container can crash soon after the start, this means we can not move the interface to the container namespace
|
||
logdata = await self._get_log()
|
||
for line in logdata.split('\n'):
|
||
log.error(line)
|
||
raise DockerError(logdata)
|
||
|
||
if self.console_type == "telnet":
|
||
await self._start_console()
|
||
elif self.console_type == "http" or self.console_type == "https":
|
||
await self._start_http()
|
||
|
||
if self.aux_type != "none":
|
||
await self._start_aux()
|
||
|
||
self._permissions_fixed = False
|
||
self.status = "started"
|
||
log.info("Docker container '{name}' [{image}] started listen for {console_type} on {console}".format(name=self._name,
|
||
image=self._image,
|
||
console=self.console,
|
||
console_type=self.console_type))
|
||
|
||
async def _start_aux(self):
|
||
"""
|
||
Start an auxiliary console
|
||
"""
|
||
|
||
# We can not use the API because docker doesn't expose a websocket api for exec
|
||
# https://github.com/GNS3/gns3-gui/issues/1039
|
||
try:
|
||
process = await asyncio.subprocess.create_subprocess_exec(
|
||
"docker", "exec", "-i", self._cid, "/gns3/bin/busybox", "script", "-qfc", "while true; do TERM=vt100 /gns3/bin/busybox sh; done", "/dev/null",
|
||
stdout=asyncio.subprocess.PIPE,
|
||
stderr=asyncio.subprocess.STDOUT,
|
||
stdin=asyncio.subprocess.PIPE)
|
||
except OSError as e:
|
||
raise DockerError("Could not start auxiliary console process: {}".format(e))
|
||
server = AsyncioTelnetServer(reader=process.stdout, writer=process.stdin, binary=True, echo=True)
|
||
try:
|
||
self._telnet_servers.append((await asyncio.start_server(server.run, self._manager.port_manager.console_host, self.aux)))
|
||
except OSError as e:
|
||
raise DockerError("Could not start Telnet server on socket {}:{}: {}".format(self._manager.port_manager.console_host, self.aux, e))
|
||
log.debug(f"Docker container '{self.name}' started listen for auxiliary telnet on {self.aux}")
|
||
|
||
async def _fix_permissions(self):
|
||
"""
|
||
Because docker run as root we need to fix permission and ownership to allow user to interact
|
||
with it from their filesystem and do operation like file delete
|
||
"""
|
||
|
||
state = await self._get_container_state()
|
||
log.info("Docker container '{name}' fix ownership, state = {state}".format(name=self._name, state=state))
|
||
if state == "stopped" or state == "exited":
|
||
# We need to restart it to fix permissions
|
||
await self.manager.query("POST", "containers/{}/start".format(self._cid))
|
||
|
||
for volume in self._volumes:
|
||
log.debug("Docker container '{name}' [{image}] fix ownership on {path}".format(
|
||
name=self._name, image=self._image, path=volume))
|
||
|
||
try:
|
||
process = await asyncio.subprocess.create_subprocess_exec(
|
||
"docker",
|
||
"exec",
|
||
self._cid,
|
||
"/gns3/bin/busybox",
|
||
"sh",
|
||
"-c",
|
||
"("
|
||
"/gns3/bin/busybox find \"{path}\" -depth -print0"
|
||
" | /gns3/bin/busybox xargs -0 /gns3/bin/busybox stat -c '%a:%u:%g:%n' > \"{path}/.gns3_perms\""
|
||
")"
|
||
" && /gns3/bin/busybox chmod -R u+rX \"{path}\""
|
||
" && /gns3/bin/busybox chown {uid}:{gid} -R \"{path}\""
|
||
.format(uid=os.getuid(), gid=os.getgid(), path=volume),
|
||
)
|
||
except OSError as e:
|
||
raise DockerError("Could not fix permissions for {}: {}".format(volume, e))
|
||
await process.wait()
|
||
self._permissions_fixed = True
|
||
|
||
async def _start_vnc_process(self, restart=False):
|
||
"""
|
||
Starts the VNC process.
|
||
"""
|
||
|
||
self._display = self._get_free_display_port()
|
||
tigervnc_path = shutil.which("Xtigervnc") or shutil.which("Xvnc")
|
||
|
||
if not (tigervnc_path or shutil.which("Xvfb") and shutil.which("x11vnc")):
|
||
raise DockerError("Please install TigerVNC (recommended) or Xvfb + x11vnc before using VNC support")
|
||
|
||
if tigervnc_path:
|
||
with open(os.path.join(self.working_dir, "vnc.log"), "w") as fd:
|
||
self._vnc_process = await asyncio.create_subprocess_exec(tigervnc_path,
|
||
"-geometry", self._console_resolution,
|
||
"-depth", "16",
|
||
"-interface", self._manager.port_manager.console_host,
|
||
"-rfbport", str(self.console),
|
||
"-AlwaysShared",
|
||
"-SecurityTypes", "None",
|
||
":{}".format(self._display),
|
||
stdout=fd, stderr=subprocess.STDOUT)
|
||
else:
|
||
if restart is False:
|
||
self._xvfb_process = await asyncio.create_subprocess_exec("Xvfb",
|
||
"-nolisten",
|
||
"tcp", ":{}".format(self._display),
|
||
"-screen", "0",
|
||
self._console_resolution + "x16")
|
||
|
||
# We pass a port for TCPV6 due to a crash in X11VNC if not here: https://github.com/GNS3/gns3-server/issues/569
|
||
with open(os.path.join(self.working_dir, "vnc.log"), "w") as fd:
|
||
self._vnc_process = await asyncio.create_subprocess_exec("x11vnc",
|
||
"-forever",
|
||
"-nopw",
|
||
"-shared",
|
||
"-geometry", self._console_resolution,
|
||
"-display", "WAIT:{}".format(self._display),
|
||
"-rfbport", str(self.console),
|
||
"-rfbportv6", str(self.console),
|
||
"-noncache",
|
||
"-listen", self._manager.port_manager.console_host,
|
||
stdout=fd, stderr=subprocess.STDOUT)
|
||
|
||
async def _start_vnc(self):
|
||
"""
|
||
Starts a VNC server for this container
|
||
"""
|
||
|
||
self._display = self._get_free_display_port()
|
||
tigervnc_path = shutil.which("Xtigervnc") or shutil.which("Xvnc")
|
||
if not (tigervnc_path or shutil.which("Xvfb") and shutil.which("x11vnc")):
|
||
raise DockerError("Please install TigerVNC server (recommended) or Xvfb + x11vnc before using VNC support")
|
||
await self._start_vnc_process()
|
||
x11_socket = os.path.join("/tmp/.X11-unix/", "X{}".format(self._display))
|
||
try:
|
||
await wait_for_file_creation(x11_socket)
|
||
except asyncio.TimeoutError:
|
||
raise DockerError('x11 socket file "{}" does not exist'.format(x11_socket))
|
||
|
||
if not hasattr(sys, "_called_from_test") or not sys._called_from_test:
|
||
# Start vncconfig for tigervnc clipboard support, connection available only after socket creation.
|
||
tigervncconfig_path = shutil.which("vncconfig")
|
||
if tigervnc_path and tigervncconfig_path:
|
||
self._vncconfig_process = await asyncio.create_subprocess_exec(tigervncconfig_path, "-display", ":{}".format(self._display), "-nowin")
|
||
|
||
# sometimes the VNC process can crash
|
||
monitor_process(self._vnc_process, self._vnc_callback)
|
||
|
||
def _vnc_callback(self, returncode):
|
||
"""
|
||
Called when the process has stopped.
|
||
|
||
:param returncode: Process returncode
|
||
"""
|
||
|
||
if returncode != 0 and self._closing is False:
|
||
self.project.emit("log.error", {"message": "The vnc process has stopped with return code {} for node '{}'. Please restart this node.".format(returncode, self.name)})
|
||
self._vnc_process = None
|
||
|
||
async def _start_http(self):
|
||
"""
|
||
Starts an HTTP tunnel to container localhost. It's not perfect
|
||
but the only way we have to inject network packet is using nc.
|
||
"""
|
||
|
||
log.debug("Forward HTTP for %s to %d", self.name, self._console_http_port)
|
||
command = ["docker", "exec", "-i", self._cid, "/gns3/bin/busybox", "nc", "127.0.0.1", str(self._console_http_port)]
|
||
# We replace host and port in the server answer otherwise some link could be broken
|
||
server = AsyncioRawCommandServer(command, replaces=[
|
||
(
|
||
'://127.0.0.1'.encode(), # {{HOST}} mean client host
|
||
'://{{HOST}}'.encode(),
|
||
),
|
||
(
|
||
':{}'.format(self._console_http_port).encode(),
|
||
':{}'.format(self.console).encode(),
|
||
)
|
||
])
|
||
self._telnet_servers.append((await asyncio.start_server(server.run, self._manager.port_manager.console_host, self.console)))
|
||
|
||
async def _window_size_changed_callback(self, columns, rows):
|
||
"""
|
||
Called when the console window size has been changed.
|
||
(when naws is enabled in the Telnet server)
|
||
|
||
:param columns: number of columns
|
||
:param rows: number of rows
|
||
"""
|
||
|
||
# resize the container TTY.
|
||
await self._manager.query("POST", "containers/{}/resize?h={}&w={}".format(self._cid, rows, columns))
|
||
|
||
|
||
async def _start_console(self):
|
||
"""
|
||
Starts streaming the console via telnet
|
||
"""
|
||
|
||
class InputStream:
|
||
|
||
def __init__(self):
|
||
self._data = b""
|
||
|
||
def write(self, data):
|
||
self._data += data
|
||
|
||
async def drain(self):
|
||
if not self.ws.closed:
|
||
await self.ws.send_bytes(self._data)
|
||
self._data = b""
|
||
|
||
output_stream = asyncio.StreamReader()
|
||
input_stream = InputStream()
|
||
telnet = AsyncioTelnetServer(reader=output_stream, writer=input_stream, echo=True, naws=True, window_size_changed_callback=self._window_size_changed_callback)
|
||
try:
|
||
self._telnet_servers.append((await asyncio.start_server(telnet.run, self._manager.port_manager.console_host, self.console)))
|
||
except OSError as e:
|
||
raise DockerError("Could not start Telnet server on socket {}:{}: {}".format(self._manager.port_manager.console_host, self.console, e))
|
||
|
||
self._console_websocket = await self.manager.websocket_query("containers/{}/attach/ws?stream=1&stdin=1&stdout=1&stderr=1".format(self._cid))
|
||
input_stream.ws = self._console_websocket
|
||
|
||
output_stream.feed_data(self.name.encode() + b" console is now available... Press RETURN to get started.\r\n")
|
||
|
||
asyncio.ensure_future(self._read_console_output(self._console_websocket, output_stream))
|
||
|
||
async def _read_console_output(self, ws, out):
|
||
"""
|
||
Reads Websocket and forward it to the telnet
|
||
|
||
:param ws: Websocket connection
|
||
:param out: Output stream
|
||
"""
|
||
|
||
while True:
|
||
msg = await ws.receive()
|
||
if msg.type == aiohttp.WSMsgType.TEXT:
|
||
out.feed_data(msg.data.encode())
|
||
elif msg.type == aiohttp.WSMsgType.BINARY:
|
||
out.feed_data(msg.data)
|
||
elif msg.type == aiohttp.WSMsgType.ERROR:
|
||
log.critical("Docker WebSocket Error: {}".format(ws.exception()))
|
||
else:
|
||
out.feed_eof()
|
||
await ws.close()
|
||
break
|
||
await self.stop()
|
||
|
||
async def reset_console(self):
|
||
"""
|
||
Reset the console.
|
||
"""
|
||
|
||
await self._clean_servers()
|
||
await self._start_console()
|
||
|
||
async def is_running(self):
|
||
"""
|
||
Checks if the container is running.
|
||
|
||
:returns: True or False
|
||
:rtype: bool
|
||
"""
|
||
|
||
state = await self._get_container_state()
|
||
if state == "running":
|
||
return True
|
||
if self.status == "started": # The container crashed we need to clean
|
||
await self.stop()
|
||
return False
|
||
|
||
async def restart(self):
|
||
"""
|
||
Restart this Docker container.
|
||
"""
|
||
|
||
await self.manager.query("POST", "containers/{}/restart".format(self._cid))
|
||
log.info("Docker container '{name}' [{image}] restarted".format(
|
||
name=self._name, image=self._image))
|
||
|
||
async def _clean_servers(self):
|
||
"""
|
||
Clean the list of running console servers
|
||
"""
|
||
|
||
if len(self._telnet_servers) > 0:
|
||
for telnet_server in self._telnet_servers:
|
||
telnet_server.close()
|
||
await telnet_server.wait_closed()
|
||
self._telnet_servers = []
|
||
|
||
async def stop(self):
|
||
"""
|
||
Stops this Docker container.
|
||
"""
|
||
|
||
try:
|
||
await self._clean_servers()
|
||
await self._stop_ubridge()
|
||
|
||
try:
|
||
state = await self._get_container_state()
|
||
except DockerHttp404Error:
|
||
self.status = "stopped"
|
||
return
|
||
|
||
if state == "paused":
|
||
await self.unpause()
|
||
|
||
if not self._permissions_fixed:
|
||
await self._fix_permissions()
|
||
|
||
state = await self._get_container_state()
|
||
if state != "stopped" or state != "exited":
|
||
# t=5 number of seconds to wait before killing the container
|
||
try:
|
||
await self.manager.query("POST", "containers/{}/stop".format(self._cid), params={"t": 5})
|
||
log.info("Docker container '{name}' [{image}] stopped".format(name=self._name, image=self._image))
|
||
except DockerHttp304Error:
|
||
# Container is already stopped
|
||
pass
|
||
# Ignore runtime error because when closing the server
|
||
except RuntimeError as e:
|
||
log.debug("Docker runtime error when closing: {}".format(str(e)))
|
||
return
|
||
self.status = "stopped"
|
||
|
||
async def pause(self):
|
||
"""
|
||
Pauses this Docker container.
|
||
"""
|
||
|
||
await self.manager.query("POST", "containers/{}/pause".format(self._cid))
|
||
self.status = "suspended"
|
||
log.info("Docker container '{name}' [{image}] paused".format(name=self._name, image=self._image))
|
||
|
||
async def unpause(self):
|
||
"""
|
||
Unpauses this Docker container.
|
||
"""
|
||
|
||
await self.manager.query("POST", "containers/{}/unpause".format(self._cid))
|
||
self.status = "started"
|
||
log.info("Docker container '{name}' [{image}] unpaused".format(name=self._name, image=self._image))
|
||
|
||
async def close(self):
|
||
"""
|
||
Closes this Docker container.
|
||
"""
|
||
|
||
self._closing = True
|
||
if not (await super().close()):
|
||
return False
|
||
await self.reset()
|
||
|
||
async def reset(self, release_nio_udp_ports=True):
|
||
|
||
try:
|
||
state = await self._get_container_state()
|
||
if state == "paused" or state == "running":
|
||
await self.stop()
|
||
|
||
if self.console_type == "vnc":
|
||
if self._vncconfig_process:
|
||
try:
|
||
self._vncconfig_process.terminate()
|
||
await self._vncconfig_process.wait()
|
||
except ProcessLookupError:
|
||
pass
|
||
if self._vnc_process:
|
||
try:
|
||
self._vnc_process.terminate()
|
||
await self._vnc_process.wait()
|
||
except ProcessLookupError:
|
||
pass
|
||
if self._xvfb_process:
|
||
try:
|
||
self._xvfb_process.terminate()
|
||
await self._xvfb_process.wait()
|
||
except ProcessLookupError:
|
||
pass
|
||
|
||
if self._display:
|
||
display = "/tmp/.X11-unix/X{}".format(self._display)
|
||
try:
|
||
if os.path.exists(display):
|
||
os.remove(display)
|
||
except OSError as e:
|
||
log.warning("Could not remove display {}: {}".format(display, e))
|
||
|
||
# v – 1/True/true or 0/False/false, Remove the volumes associated to the container. Default false.
|
||
# force - 1/True/true or 0/False/false, Kill then remove the container. Default false.
|
||
try:
|
||
await self.manager.query("DELETE", "containers/{}".format(self._cid), params={"force": 1, "v": 1})
|
||
except DockerError:
|
||
pass
|
||
log.info("Docker container '{name}' [{image}] removed".format(
|
||
name=self._name, image=self._image))
|
||
|
||
if release_nio_udp_ports:
|
||
for adapter in self._ethernet_adapters:
|
||
if adapter is not None:
|
||
for nio in adapter.ports.values():
|
||
if nio and isinstance(nio, NIOUDP):
|
||
self.manager.port_manager.release_udp_port(nio.lport, self._project)
|
||
# Ignore runtime error because when closing the server
|
||
except (DockerHttp404Error, RuntimeError) as e:
|
||
log.debug("Docker error when closing: {}".format(str(e)))
|
||
return
|
||
|
||
async def _add_ubridge_connection(self, nio, adapter_number):
|
||
"""
|
||
Creates a connection in uBridge.
|
||
|
||
:param nio: NIO instance or None if it's a dummy interface (if an interface is missing in ubridge you can't see it via ifconfig in the container)
|
||
:param adapter_number: adapter number
|
||
"""
|
||
|
||
try:
|
||
adapter = self._ethernet_adapters[adapter_number]
|
||
except IndexError:
|
||
raise DockerError("Adapter {adapter_number} doesn't exist on Docker container '{name}'".format(name=self.name,
|
||
adapter_number=adapter_number))
|
||
|
||
for index in range(4096):
|
||
if "tap-gns3-e{}".format(index) not in psutil.net_if_addrs():
|
||
adapter.host_ifc = "tap-gns3-e{}".format(str(index))
|
||
break
|
||
if adapter.host_ifc is None:
|
||
raise DockerError("Adapter {adapter_number} couldn't allocate interface on Docker container '{name}'. Too many Docker interfaces already exists".format(name=self.name,
|
||
adapter_number=adapter_number))
|
||
bridge_name = 'bridge{}'.format(adapter_number)
|
||
await self._ubridge_send('bridge create {}'.format(bridge_name))
|
||
self._bridges.add(bridge_name)
|
||
await self._ubridge_send('bridge add_nio_tap bridge{adapter_number} {hostif}'.format(adapter_number=adapter_number,
|
||
hostif=adapter.host_ifc))
|
||
log.debug("Move container %s adapter %s to namespace %s", self.name, adapter.host_ifc, self._namespace)
|
||
try:
|
||
await self._ubridge_send('docker move_to_ns {ifc} {ns} eth{adapter}'.format(ifc=adapter.host_ifc,
|
||
ns=self._namespace,
|
||
adapter=adapter_number))
|
||
except UbridgeError as e:
|
||
raise UbridgeNamespaceError(e)
|
||
|
||
if nio:
|
||
await self._connect_nio(adapter_number, nio)
|
||
|
||
async def _get_namespace(self):
|
||
|
||
result = await self.manager.query("GET", "containers/{}/json".format(self._cid))
|
||
return int(result['State']['Pid'])
|
||
|
||
async def _connect_nio(self, adapter_number, nio):
|
||
|
||
bridge_name = 'bridge{}'.format(adapter_number)
|
||
await self._ubridge_send('bridge add_nio_udp {bridge_name} {lport} {rhost} {rport}'.format(bridge_name=bridge_name,
|
||
lport=nio.lport,
|
||
rhost=nio.rhost,
|
||
rport=nio.rport))
|
||
|
||
if nio.capturing:
|
||
await self._ubridge_send('bridge start_capture {bridge_name} "{pcap_file}"'.format(bridge_name=bridge_name,
|
||
pcap_file=nio.pcap_output_file))
|
||
await self._ubridge_send('bridge start {bridge_name}'.format(bridge_name=bridge_name))
|
||
await self._ubridge_apply_filters(bridge_name, nio.filters)
|
||
|
||
async def adapter_add_nio_binding(self, adapter_number, nio):
|
||
"""
|
||
Adds an adapter NIO binding.
|
||
|
||
:param adapter_number: adapter number
|
||
:param nio: NIO instance to add to the slot/port
|
||
"""
|
||
|
||
try:
|
||
adapter = self._ethernet_adapters[adapter_number]
|
||
except IndexError:
|
||
raise DockerError("Adapter {adapter_number} doesn't exist on Docker container '{name}'".format(name=self.name,
|
||
adapter_number=adapter_number))
|
||
|
||
if self.status == "started" and self.ubridge:
|
||
await self._connect_nio(adapter_number, nio)
|
||
|
||
adapter.add_nio(0, nio)
|
||
log.info("Docker container '{name}' [{id}]: {nio} added to adapter {adapter_number}".format(name=self.name,
|
||
id=self._id,
|
||
nio=nio,
|
||
adapter_number=adapter_number))
|
||
|
||
async def adapter_update_nio_binding(self, adapter_number, nio):
|
||
"""
|
||
Update an adapter NIO binding.
|
||
|
||
:param adapter_number: adapter number
|
||
:param nio: NIO instance to update the adapter
|
||
"""
|
||
|
||
if self.ubridge:
|
||
bridge_name = 'bridge{}'.format(adapter_number)
|
||
if bridge_name in self._bridges:
|
||
await self._ubridge_apply_filters(bridge_name, nio.filters)
|
||
|
||
async def adapter_remove_nio_binding(self, adapter_number):
|
||
"""
|
||
Removes an adapter NIO binding.
|
||
|
||
:param adapter_number: adapter number
|
||
|
||
:returns: NIO instance
|
||
"""
|
||
|
||
try:
|
||
adapter = self._ethernet_adapters[adapter_number]
|
||
except IndexError:
|
||
raise DockerError("Adapter {adapter_number} doesn't exist on Docker VM '{name}'".format(name=self.name,
|
||
adapter_number=adapter_number))
|
||
|
||
await self.stop_capture(adapter_number)
|
||
if self.ubridge:
|
||
nio = adapter.get_nio(0)
|
||
bridge_name = 'bridge{}'.format(adapter_number)
|
||
await self._ubridge_send("bridge stop {}".format(bridge_name))
|
||
await self._ubridge_send('bridge remove_nio_udp bridge{adapter} {lport} {rhost} {rport}'.format(adapter=adapter_number,
|
||
lport=nio.lport,
|
||
rhost=nio.rhost,
|
||
rport=nio.rport))
|
||
|
||
adapter.remove_nio(0)
|
||
|
||
log.info("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))
|
||
|
||
def get_nio(self, adapter_number):
|
||
"""
|
||
Gets an adapter NIO binding.
|
||
|
||
:param adapter_number: adapter number
|
||
|
||
:returns: NIO instance
|
||
"""
|
||
|
||
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))
|
||
|
||
return nio
|
||
|
||
@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
|
||
"""
|
||
|
||
if len(self._ethernet_adapters) == adapters:
|
||
return
|
||
|
||
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))
|
||
|
||
async def pull_image(self, image):
|
||
"""
|
||
Pulls an image from Docker repository
|
||
"""
|
||
|
||
def callback(msg):
|
||
self.project.emit("log.info", {"message": msg})
|
||
await self.manager.pull_image(image, progress_callback=callback)
|
||
|
||
async def _start_ubridge_capture(self, adapter_number, output_file):
|
||
"""
|
||
Starts 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:
|
||
raise DockerError("Cannot start the packet capture: uBridge is not running")
|
||
await self._ubridge_send('bridge start_capture {name} "{output_file}"'.format(name=adapter, output_file=output_file))
|
||
|
||
async def _stop_ubridge_capture(self, adapter_number):
|
||
"""
|
||
Stops a packet capture in uBridge.
|
||
|
||
:param adapter_number: adapter number
|
||
"""
|
||
|
||
adapter = "bridge{}".format(adapter_number)
|
||
if not self.ubridge:
|
||
raise DockerError("Cannot stop the packet capture: uBridge is not running")
|
||
await self._ubridge_send("bridge stop_capture {name}".format(name=adapter))
|
||
|
||
async 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
|
||
"""
|
||
|
||
nio = self.get_nio(adapter_number)
|
||
if nio.capturing:
|
||
raise DockerError("Packet capture is already activated on adapter {adapter_number}".format(adapter_number=adapter_number))
|
||
|
||
nio.start_packet_capture(output_file)
|
||
if self.status == "started" and self.ubridge:
|
||
await 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))
|
||
|
||
async def stop_capture(self, adapter_number):
|
||
"""
|
||
Stops a packet capture.
|
||
|
||
:param adapter_number: adapter number
|
||
"""
|
||
|
||
nio = self.get_nio(adapter_number)
|
||
if not nio.capturing:
|
||
return
|
||
nio.stop_packet_capture()
|
||
if self.status == "started" and self.ubridge:
|
||
await 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))
|
||
|
||
async def _get_log(self):
|
||
"""
|
||
Returns the log from the container
|
||
|
||
:returns: string
|
||
"""
|
||
|
||
result = await self.manager.query("GET", "containers/{}/logs".format(self._cid), params={"stderr": 1, "stdout": 1})
|
||
return result
|
||
|
||
async def delete(self):
|
||
"""
|
||
Deletes the VM (including all its files).
|
||
"""
|
||
|
||
await self.close()
|
||
await super().delete()
|