mirror of
https://github.com/GNS3/gns3-server
synced 2024-12-01 04:38:12 +00:00
1037 lines
42 KiB
Python
1037 lines
42 KiB
Python
# -*- 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 <http://www.gnu.org/licenses/>.
|
||
|
||
"""
|
||
Docker container instance.
|
||
"""
|
||
|
||
import asyncio
|
||
import shutil
|
||
import psutil
|
||
import shlex
|
||
import aiohttp
|
||
import os
|
||
|
||
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
|
||
"""
|
||
|
||
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):
|
||
|
||
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._xvfb_process = None
|
||
self._x11vnc_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._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,
|
||
"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
|
||
}
|
||
|
||
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
|
||
|
||
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
|
||
"""
|
||
|
||
resources = get_resource("compute/docker/resources")
|
||
if not os.path.exists(resources):
|
||
raise DockerError("{} is missing can't start Docker containers".format(resources))
|
||
binds = ["{}:/gns3:ro".format(resources)]
|
||
|
||
# We mount our own etc/network
|
||
try:
|
||
network_config = self._create_network_config()
|
||
except OSError as e:
|
||
raise DockerError("Could not create network config in the container: {}".format(e))
|
||
binds.append("{}:/gns3volumes/etc/network:rw".format(network_config))
|
||
|
||
self._volumes = ["/etc/network"]
|
||
|
||
volumes = image_info.get("Config", {}).get("Volumes")
|
||
if volumes is None:
|
||
return binds
|
||
for volume in volumes.keys():
|
||
source = os.path.join(self.working_dir, os.path.relpath(volume, "/"))
|
||
os.makedirs(source, exist_ok=True)
|
||
binds.append("{}:/gns3volumes{}".format(source, volume))
|
||
self._volumes.append(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)
|
||
|
||
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 uncomment lines to configure the network
|
||
#
|
||
|
||
""")
|
||
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""".format(adapter=adapter))
|
||
return path
|
||
|
||
async def create(self):
|
||
"""
|
||
Creates the Docker container.
|
||
"""
|
||
|
||
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,
|
||
"Name": 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": []})["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": []})["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)))
|
||
|
||
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 not e.startswith("GNS3_"):
|
||
formatted = self._format_env(variables, e)
|
||
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/:/tmp/.X11-unix/")
|
||
|
||
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.
|
||
"""
|
||
|
||
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._x11vnc_process:
|
||
# start the x11vnc process in case it had previously crashed
|
||
self._x11vnc_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)
|
||
|
||
await self._clean_servers()
|
||
|
||
await self.manager.query("POST", "containers/{}/start".format(self._cid))
|
||
self._namespace = await self._get_namespace()
|
||
|
||
await self._start_ubridge()
|
||
|
||
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.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("Docker container '%s' started listen for auxilary 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()
|
||
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()
|
||
|
||
async def _start_vnc(self):
|
||
"""
|
||
Starts a VNC server for this container
|
||
"""
|
||
|
||
self._display = self._get_free_display_port()
|
||
if shutil.which("Xvfb") is None or shutil.which("x11vnc") is None:
|
||
raise DockerError("Please install Xvfb and x11vnc before using VNC support")
|
||
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
|
||
self._x11vnc_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)
|
||
x11_socket = os.path.join("/tmp/.X11-unix/", "X{}".format(self._display))
|
||
await wait_for_file_creation(x11_socket)
|
||
|
||
# sometimes the x11vnc process can crash
|
||
monitor_process(self._x11vnc_process, self._x11vnc_callback)
|
||
|
||
def _x11vnc_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 x11vnc process has stopped with return code {} for node '{}'. Please restart this node.".format(returncode, self.name)})
|
||
self._x11vnc_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 _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:
|
||
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)
|
||
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.tp == aiohttp.WSMsgType.text:
|
||
out.feed_data(msg.data.encode())
|
||
elif msg.tp == aiohttp.WSMsgType.BINARY:
|
||
out.feed_data(msg.data)
|
||
elif msg.tp == aiohttp.WSMsgType.ERROR:
|
||
log.critical("Docker WebSocket Error: {}".format(msg.data))
|
||
else:
|
||
out.feed_eof()
|
||
ws.close()
|
||
break
|
||
await self.stop()
|
||
|
||
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()
|
||
|
||
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._x11vnc_process:
|
||
try:
|
||
self._x11vnc_process.terminate()
|
||
await self._x11vnc_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 a port NIO binding.
|
||
|
||
:param adapter_number: adapter number
|
||
:param nio: NIO instance to add to 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))
|
||
|
||
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))
|
||
|
||
@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
|
||
"""
|
||
|
||
try:
|
||
adapter = self._ethernet_adapters[adapter_number]
|
||
except KeyError:
|
||
raise DockerError("Adapter {adapter_number} doesn't exist on Docker VM '{name}'".format(name=self.name,
|
||
adapter_number=adapter_number))
|
||
|
||
nio = adapter.get_nio(0)
|
||
|
||
if not nio:
|
||
raise DockerError("Adapter {} is not connected".format(adapter_number))
|
||
|
||
if nio.capturing:
|
||
raise DockerError("Packet capture is already activated on adapter {adapter_number}".format(adapter_number=adapter_number))
|
||
|
||
nio.startPacketCapture(output_file)
|
||
|
||
if self.status == "started" 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
|
||
"""
|
||
|
||
try:
|
||
adapter = self._ethernet_adapters[adapter_number]
|
||
except KeyError:
|
||
raise DockerError("Adapter {adapter_number} doesn't exist on Docker VM '{name}'".format(name=self.name,
|
||
adapter_number=adapter_number))
|
||
|
||
nio = adapter.get_nio(0)
|
||
|
||
if not nio:
|
||
raise DockerError("Adapter {} is not connected".format(adapter_number))
|
||
|
||
nio.stopPacketCapture()
|
||
|
||
if self.status == "started" 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()
|