# -*- coding: utf-8 -*- # # Copyright (C) 2015 GNS3 Technologies Inc. # # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation, either version 3 of the License, or # (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program. If not, see . """ Docker container instance. """ import sys import asyncio import shutil import psutil import shlex import aiohttp import subprocess import os import re from gns3server.utils.asyncio.telnet_server import AsyncioTelnetServer from gns3server.utils.asyncio.raw_command_server import AsyncioRawCommandServer from gns3server.utils.asyncio import wait_for_file_creation from gns3server.utils.asyncio import monitor_process from gns3server.utils.get_resource import get_resource from gns3server.ubridge.ubridge_error import UbridgeError, UbridgeNamespaceError from ..base_node import BaseNode from ..adapters.ethernet_adapter import EthernetAdapter from ..nios.nio_udp import NIOUDP from .docker_error import ( DockerError, DockerHttp304Error, DockerHttp404Error ) import logging log = logging.getLogger(__name__) class DockerVM(BaseNode): """ Docker container implementation. :param name: Docker container name :param node_id: Node identifier :param project: Project instance :param manager: Manager instance :param image: Docker image :param console: TCP console port :param console_type: Console type :param aux: TCP aux console port :param console_resolution: Resolution of the VNC display :param console_http_port: Port to redirect HTTP queries :param console_http_path: Url part with the path of the web interface :param extra_hosts: Hosts which will be written into /etc/hosts into docker conainer :param extra_volumes: Additional directories to make persistent """ def __init__(self, name, node_id, project, manager, image, console=None, aux=None, start_command=None, adapters=None, environment=None, console_type="telnet", console_resolution="1024x768", console_http_port=80, console_http_path="/", extra_hosts=None, extra_volumes=[]): super().__init__(name, node_id, project, manager, console=console, aux=aux, allocate_aux=True, console_type=console_type) # force the latest image if no version is specified if ":" not in image: image = "{}:latest".format(image) self._image = image self._start_command = start_command self._environment = environment self._cid = None self._ethernet_adapters = [] self._temporary_directory = None self._telnet_servers = [] self._vnc_process = None self._vncconfig_process = None self._console_resolution = console_resolution self._console_http_path = console_http_path self._console_http_port = console_http_port self._console_websocket = None self._extra_hosts = extra_hosts self._extra_volumes = extra_volumes or [] self._permissions_fixed = True self._display = None self._closing = False self._volumes = [] # Keep a list of created bridge self._bridges = set() if adapters is None: self.adapters = 1 else: self.adapters = adapters log.debug("{module}: {name} [{image}] initialized.".format(module=self.manager.module_name, name=self.name, image=self._image)) def __json__(self): return { "name": self._name, "usage": self.usage, "node_id": self._id, "container_id": self._cid, "project_id": self._project.id, "image": self._image, "adapters": self.adapters, "console": self.console, "console_type": self.console_type, "console_resolution": self.console_resolution, "console_http_port": self.console_http_port, "console_http_path": self.console_http_path, "aux": self.aux, "start_command": self.start_command, "status": self.status, "environment": self.environment, "node_directory": self.working_path, "extra_hosts": self.extra_hosts, "extra_volumes": self.extra_volumes, } def _get_free_display_port(self): """ Search a free display port """ display = 100 if not os.path.exists("/tmp/.X11-unix/"): return display while True: if not os.path.exists("/tmp/.X11-unix/X{}".format(display)): return display display += 1 @property def ethernet_adapters(self): return self._ethernet_adapters @property def start_command(self): return self._start_command @start_command.setter def start_command(self, command): if command: command = command.strip() if command is None or len(command) == 0: self._start_command = None else: self._start_command = command @property def console_resolution(self): return self._console_resolution @console_resolution.setter def console_resolution(self, resolution): self._console_resolution = resolution @property def console_http_path(self): return self._console_http_path @console_http_path.setter def console_http_path(self, path): self._console_http_path = path @property def console_http_port(self): return self._console_http_port @console_http_port.setter def console_http_port(self, port): self._console_http_port = port @property def environment(self): return self._environment @environment.setter def environment(self, command): self._environment = command @property def extra_hosts(self): return self._extra_hosts @extra_hosts.setter def extra_hosts(self, extra_hosts): self._extra_hosts = extra_hosts @property def extra_volumes(self): return self._extra_volumes @extra_volumes.setter def extra_volumes(self, extra_volumes): self._extra_volumes = extra_volumes async def _get_container_state(self): """ Returns the container state (e.g. running, paused etc.) :returns: state :rtype: str """ try: result = await self.manager.query("GET", "containers/{}/json".format(self._cid)) except DockerError: return "exited" if result["State"]["Paused"]: return "paused" if result["State"]["Running"]: return "running" return "exited" async def _get_image_information(self): """ :returns: Dictionary information about the container image """ result = await self.manager.query("GET", "images/{}/json".format(self._image)) return result def _mount_binds(self, image_info): """ :returns: Return the path that we need to map to local folders """ try: resources_path = self.manager.resources_path() except OSError as e: raise DockerError(f"Cannot access resources: {e}") log.info(f'Mount resources from "{resources_path}"') binds = ["{}:/gns3:ro".format(resources_path)] # We mount our own etc/network try: self._create_network_config() except OSError as e: raise DockerError("Could not create network config in the container: {}".format(e)) volumes = ["/etc/network"] volumes.extend((image_info.get("Config", {}).get("Volumes") or {}).keys()) for volume in self._extra_volumes: if not volume.strip() or volume[0] != "/" or volume.find("..") >= 0: raise DockerError("Persistent volume '{}' has invalid format. It must start with a '/' and not contain '..'.".format(volume)) volumes.extend(self._extra_volumes) self._volumes = [] # define lambdas for validation checks nf = lambda x: re.sub(r"//+", "/", (x if x.endswith("/") else x + "/")) generalises = lambda v1, v2: nf(v2).startswith(nf(v1)) for volume in volumes: # remove any mount that is equal or more specific, then append this one self._volumes = list(filter(lambda v: not generalises(volume, v), self._volumes)) # if there is nothing more general, append this mount if not [ v for v in self._volumes if generalises(v, volume) ] : self._volumes.append(volume) for volume in self._volumes: source = os.path.join(self.working_dir, os.path.relpath(volume, "/")) os.makedirs(source, exist_ok=True) binds.append("{}:/gns3volumes{}".format(source, volume)) return binds def _create_network_config(self): """ If network config is empty we create a sample config """ path = os.path.join(self.working_dir, "etc", "network") os.makedirs(path, exist_ok=True) open(os.path.join(path, ".gns3_perms"), 'a').close() os.makedirs(os.path.join(path, "if-up.d"), exist_ok=True) os.makedirs(os.path.join(path, "if-down.d"), exist_ok=True) os.makedirs(os.path.join(path, "if-pre-up.d"), exist_ok=True) os.makedirs(os.path.join(path, "if-post-down.d"), exist_ok=True) os.makedirs(os.path.join(path, "interfaces.d"), exist_ok=True) if not os.path.exists(os.path.join(path, "interfaces")): with open(os.path.join(path, "interfaces"), "w+") as f: f.write("""# # This is a sample network config, please uncomment lines to configure the network # # Uncomment this line to load custom interface files # source /etc/network/interfaces.d/* """) for adapter in range(0, self.adapters): f.write(""" # Static config for eth{adapter} #auto eth{adapter} #iface eth{adapter} inet static #\taddress 192.168.{adapter}.2 #\tnetmask 255.255.255.0 #\tgateway 192.168.{adapter}.1 #\tup echo nameserver 192.168.{adapter}.1 > /etc/resolv.conf # DHCP config for eth{adapter} #auto eth{adapter} #iface eth{adapter} inet dhcp #\thostname {hostname} """.format(adapter=adapter, hostname=self._name)) return path async def create(self): """ Creates the Docker container. """ if ":" in os.path.splitdrive(self.working_dir)[1]: raise DockerError("Cannot create a Docker container with a project directory containing a colon character (':')") try: image_infos = await self._get_image_information() except DockerHttp404Error: log.info("Image '{}' is missing, pulling it from Docker hub...".format(self._image)) await self.pull_image(self._image) image_infos = await self._get_image_information() if image_infos is None: raise DockerError("Cannot get information for image '{}', please try again.".format(self._image)) params = { "Hostname": self._name, "Image": self._image, "NetworkDisabled": True, "Tty": True, "OpenStdin": True, "StdinOnce": False, "HostConfig": { "CapAdd": ["ALL"], "Privileged": True, "Binds": self._mount_binds(image_infos), }, "Volumes": {}, "Env": ["container=docker"], # Systemd compliant: https://github.com/GNS3/gns3-server/issues/573 "Cmd": [], "Entrypoint": image_infos.get("Config", {"Entrypoint": []}).get("Entrypoint") } if params["Entrypoint"] is None: params["Entrypoint"] = [] if self._start_command: try: params["Cmd"] = shlex.split(self._start_command) except ValueError as e: raise DockerError("Invalid start command '{}': {}".format(self._start_command, e)) if len(params["Cmd"]) == 0: params["Cmd"] = image_infos.get("Config", {"Cmd": []}).get("Cmd") if params["Cmd"] is None: params["Cmd"] = [] if len(params["Cmd"]) == 0 and len(params["Entrypoint"]) == 0: params["Cmd"] = ["/bin/sh"] params["Entrypoint"].insert(0, "/gns3/init.sh") # FIXME /gns3/init.sh is not found? # Give the information to the container on how many interface should be inside params["Env"].append("GNS3_MAX_ETHERNET=eth{}".format(self.adapters - 1)) # Give the information to the container the list of volume path mounted params["Env"].append("GNS3_VOLUMES={}".format(":".join(self._volumes))) # Pass user configured for image to init script if image_infos.get("Config", {"User": ""}).get("User"): params["User"] = "root" params["Env"].append("GNS3_USER={}".format(image_infos.get("Config", {"User": ""})["User"])) variables = self.project.variables if not variables: variables = [] for var in variables: formatted = self._format_env(variables, var.get('value', '')) params["Env"].append("{}={}".format(var["name"], formatted)) if self._environment: for e in self._environment.strip().split("\n"): e = e.strip() if e.split("=")[0] == "": self.project.emit("log.warning", {"message": "{} has invalid environment variable: {}".format(self.name, e)}) continue if not e.startswith("GNS3_"): formatted = self._format_env(variables, e) vm_name = self._name.replace(",", ",,") project_path = self.project.path.replace(",", ",,") formatted = formatted.replace("%vm-name%", '"' + vm_name.replace('"', '\\"') + '"') formatted = formatted.replace("%vm-id%", self._id) formatted = formatted.replace("%project-id%", self.project.id) formatted = formatted.replace("%project-path%", '"' + project_path.replace('"', '\\"') + '"') params["Env"].append(formatted) if self._console_type == "vnc": await self._start_vnc() params["Env"].append("QT_GRAPHICSSYSTEM=native") # To fix a Qt issue: https://github.com/GNS3/gns3-server/issues/556 params["Env"].append("DISPLAY=:{}".format(self._display)) params["HostConfig"]["Binds"].append("/tmp/.X11-unix/X{0}:/tmp/.X11-unix/X{0}:ro".format(self._display)) if self._extra_hosts: extra_hosts = self._format_extra_hosts(self._extra_hosts) if extra_hosts: params["Env"].append("GNS3_EXTRA_HOSTS={}".format(extra_hosts)) result = await self.manager.query("POST", "containers/create", data=params) self._cid = result['Id'] 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", "")) 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: hostname, ip = host.split(":") hostname = hostname.strip() ip = ip.strip() if hostname and ip: 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. """ await self.manager.install_resources() 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.allocate_aux: 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( "script", "-qfc", f"docker exec -i -t {self._cid} /gns3/bin/busybox sh -c '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("Docker container '%s' started listen for auxiliary telnet on %d", self.name, 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: raise DockerError("Please install TigerVNC server 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, "-extension", "MIT-SHM", "-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) 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: raise DockerError("Please install TigerVNC server 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._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()