mirror of
https://github.com/GNS3/gns3-server
synced 2024-12-01 12:48:14 +00:00
59ad5c55ec
# Conflicts: # CHANGELOG # gns3server/config_samples/gns3_server.conf # gns3server/controller/__init__.py # gns3server/crash_report.py # gns3server/static/web-ui/index.html # gns3server/static/web-ui/main.b65e52314df938ebe652.js # gns3server/version.py
318 lines
12 KiB
Python
318 lines
12 KiB
Python
#
|
|
# 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 server module.
|
|
"""
|
|
|
|
import os
|
|
import sys
|
|
import json
|
|
import asyncio
|
|
import logging
|
|
import aiohttp
|
|
import shutil
|
|
import platformdirs
|
|
|
|
from gns3server.utils import parse_version
|
|
from gns3server.config import Config
|
|
from gns3server.utils.asyncio import locking
|
|
from gns3server.compute.base_manager import BaseManager
|
|
from gns3server.compute.docker.docker_vm import DockerVM
|
|
from gns3server.compute.docker.docker_error import DockerError, DockerHttp304Error, DockerHttp404Error
|
|
|
|
log = logging.getLogger(__name__)
|
|
|
|
|
|
# Be careful to keep it consistent
|
|
DOCKER_MINIMUM_API_VERSION = "1.25"
|
|
DOCKER_MINIMUM_VERSION = "1.13"
|
|
DOCKER_PREFERRED_API_VERSION = "1.30"
|
|
CHUNK_SIZE = 1024 * 8 # 8KB
|
|
|
|
|
|
class Docker(BaseManager):
|
|
|
|
_NODE_CLASS = DockerVM
|
|
|
|
def __init__(self):
|
|
|
|
super().__init__()
|
|
self._server_url = "/var/run/docker.sock"
|
|
self._connected = False
|
|
# Allow locking during ubridge operations
|
|
self.ubridge_lock = asyncio.Lock()
|
|
self._connector = None
|
|
self._session = None
|
|
self._api_version = DOCKER_MINIMUM_API_VERSION
|
|
|
|
@staticmethod
|
|
async def install_busybox(dst_dir):
|
|
|
|
dst_busybox = os.path.join(dst_dir, "bin", "busybox")
|
|
if os.path.isfile(dst_busybox):
|
|
return
|
|
for busybox_exec in ("busybox-static", "busybox.static", "busybox"):
|
|
busybox_path = shutil.which(busybox_exec)
|
|
if busybox_path:
|
|
try:
|
|
# check that busybox is statically linked
|
|
# (dynamically linked busybox will fail to run in a container)
|
|
proc = await asyncio.create_subprocess_exec(
|
|
"ldd",
|
|
busybox_path,
|
|
stdout=asyncio.subprocess.PIPE,
|
|
stderr=asyncio.subprocess.DEVNULL
|
|
)
|
|
stdout, _ = await proc.communicate()
|
|
if proc.returncode == 1:
|
|
# ldd returns 1 if the file is not a dynamic executable
|
|
log.info(f"Installing busybox from '{busybox_path}' to '{dst_busybox}'")
|
|
shutil.copy2(busybox_path, dst_busybox, follow_symlinks=True)
|
|
return
|
|
else:
|
|
log.warning(f"Busybox '{busybox_path}' is dynamically linked\n"
|
|
f"{stdout.decode('utf-8', errors='ignore').strip()}")
|
|
except OSError as e:
|
|
raise DockerError(f"Could not install busybox: {e}")
|
|
raise DockerError("No busybox executable could be found, please install busybox (apt install busybox-static on Debian/Ubuntu) and make sure it is in your PATH")
|
|
|
|
@staticmethod
|
|
def resources_path():
|
|
"""
|
|
Get the Docker resources storage directory
|
|
"""
|
|
|
|
server_config = Config.instance().get_section_config("Server")
|
|
appname = vendor = "GNS3"
|
|
resources_path = os.path.expanduser(server_config.get("resources_path", platformdirs.user_data_dir(appname, vendor, roaming=True)))
|
|
docker_resources_dir = os.path.join(resources_path, "docker")
|
|
os.makedirs(docker_resources_dir, exist_ok=True)
|
|
return docker_resources_dir
|
|
|
|
async def install_resources(self):
|
|
"""
|
|
Copy the necessary resources to a writable location and install busybox
|
|
"""
|
|
|
|
try:
|
|
dst_path = self.resources_path()
|
|
log.info(f"Installing Docker resources in '{dst_path}'")
|
|
from gns3server.controller import Controller
|
|
Controller.instance().install_resource_files(dst_path, "compute/docker/resources")
|
|
await self.install_busybox(dst_path)
|
|
except OSError as e:
|
|
raise DockerError(f"Could not install Docker resources to {dst_path}: {e}")
|
|
|
|
async def _check_connection(self):
|
|
|
|
if not self._connected:
|
|
try:
|
|
self._connected = True
|
|
version = await self.query("GET", "version")
|
|
except (aiohttp.ClientError, FileNotFoundError):
|
|
self._connected = False
|
|
raise DockerError("Can't connect to docker daemon")
|
|
|
|
docker_version = parse_version(version["ApiVersion"])
|
|
|
|
if docker_version < parse_version(DOCKER_MINIMUM_API_VERSION):
|
|
raise DockerError(
|
|
f"Docker version is {version['Version']}. "
|
|
f"GNS3 requires a minimum version of {DOCKER_MINIMUM_VERSION}"
|
|
)
|
|
|
|
preferred_api_version = parse_version(DOCKER_PREFERRED_API_VERSION)
|
|
if docker_version >= preferred_api_version:
|
|
self._api_version = DOCKER_PREFERRED_API_VERSION
|
|
|
|
def connector(self):
|
|
|
|
if self._connector is None or self._connector.closed:
|
|
if not sys.platform.startswith("linux"):
|
|
raise DockerError("Docker is supported only on Linux")
|
|
try:
|
|
self._connector = aiohttp.connector.UnixConnector(self._server_url, limit=None)
|
|
except (aiohttp.ClientError, FileNotFoundError):
|
|
raise DockerError("Can't connect to docker daemon")
|
|
return self._connector
|
|
|
|
async def unload(self):
|
|
|
|
await super().unload()
|
|
if self._connected:
|
|
if self._connector and not self._connector.closed:
|
|
await self._connector.close()
|
|
if self._session and not self._session.closed:
|
|
await self._session.close()
|
|
|
|
async def query(self, method, path, data={}, params={}):
|
|
"""
|
|
Makes a query to the Docker daemon and decode the request
|
|
|
|
:param method: HTTP method
|
|
:param path: Endpoint in API
|
|
:param data: Dictionary with the body. Will be transformed to a JSON
|
|
:param params: Parameters added as a query arg
|
|
"""
|
|
|
|
response = await self.http_query(method, path, data=data, params=params)
|
|
body = await response.read()
|
|
response.close()
|
|
if body and len(body):
|
|
if response.headers.get('CONTENT-TYPE') == 'application/json':
|
|
body = json.loads(body.decode("utf-8"))
|
|
else:
|
|
body = body.decode("utf-8")
|
|
log.debug("Query Docker %s %s params=%s data=%s Response: %s", method, path, params, data, body)
|
|
return body
|
|
|
|
async def http_query(self, method, path, data={}, params={}, timeout=300):
|
|
"""
|
|
Makes a query to the docker daemon
|
|
|
|
:param method: HTTP method
|
|
:param path: Endpoint in API
|
|
:param data: Dictionnary with the body. Will be transformed to a JSON
|
|
:param params: Parameters added as a query arg
|
|
:param timeout: Timeout
|
|
:returns: HTTP response
|
|
"""
|
|
|
|
data = json.dumps(data)
|
|
if timeout is None:
|
|
timeout = 60 * 60 * 24 * 31 # One month timeout
|
|
|
|
if path == 'version':
|
|
url = "http://docker/v1.24/" + path
|
|
else:
|
|
url = "http://docker/v" + DOCKER_MINIMUM_API_VERSION + "/" + path
|
|
try:
|
|
if path != "version": # version is use by check connection
|
|
await self._check_connection()
|
|
if self._session is None or self._session.closed:
|
|
connector = self.connector()
|
|
self._session = aiohttp.ClientSession(connector=connector)
|
|
response = await self._session.request(
|
|
method,
|
|
url,
|
|
params=params,
|
|
data=data,
|
|
headers={
|
|
"content-type": "application/json",
|
|
},
|
|
timeout=timeout,
|
|
)
|
|
except aiohttp.ClientError as e:
|
|
raise DockerError(f"Docker has returned an error: {e}")
|
|
except asyncio.TimeoutError:
|
|
raise DockerError("Docker timeout " + method + " " + path)
|
|
if response.status >= 300:
|
|
body = await response.read()
|
|
try:
|
|
body = json.loads(body.decode("utf-8"))["message"]
|
|
except ValueError:
|
|
pass
|
|
log.debug(f"Query Docker {method} {path} params={params} data={data} Response: {body}")
|
|
if response.status == 304:
|
|
raise DockerHttp304Error(f"Docker has returned an error: {response.status} {body}")
|
|
elif response.status == 404:
|
|
raise DockerHttp404Error(f"Docker has returned an error: {response.status} {body}")
|
|
else:
|
|
raise DockerError(f"Docker has returned an error: {response.status} {body}")
|
|
return response
|
|
|
|
async def websocket_query(self, path, params={}):
|
|
"""
|
|
Opens a websocket connection
|
|
|
|
:param path: Endpoint in API
|
|
:param params: Parameters added as a query arg
|
|
:returns: Websocket
|
|
"""
|
|
|
|
url = "http://docker/v" + self._api_version + "/" + path
|
|
connection = await self._session.ws_connect(url, origin="http://docker", autoping=True)
|
|
return connection
|
|
|
|
@locking
|
|
async def pull_image(self, image, progress_callback=None):
|
|
"""
|
|
Pulls an image from the Docker repository
|
|
|
|
:params image: Image name
|
|
:params progress_callback: A function that receive a log message about image download progress
|
|
"""
|
|
|
|
try:
|
|
await self.query("GET", f"images/{image}/json")
|
|
return # We already have the image skip the download
|
|
except DockerHttp404Error:
|
|
pass
|
|
|
|
if progress_callback:
|
|
progress_callback(f"Pulling '{image}' from docker hub")
|
|
try:
|
|
response = await self.http_query("POST", "images/create", params={"fromImage": image}, timeout=None)
|
|
except DockerError as e:
|
|
raise DockerError(
|
|
f"Could not pull the '{image}' image from Docker Hub, "
|
|
f"please check your Internet connection (original error: {e})"
|
|
)
|
|
# The pull api will stream status via an HTTP JSON stream
|
|
content = ""
|
|
while True:
|
|
try:
|
|
chunk = await response.content.read(CHUNK_SIZE)
|
|
except aiohttp.ServerDisconnectedError:
|
|
log.error(f"Disconnected from server while pulling Docker image '{image}' from docker hub")
|
|
break
|
|
except asyncio.TimeoutError:
|
|
log.error(f"Timeout while pulling Docker image '{image}' from docker hub")
|
|
break
|
|
if not chunk:
|
|
break
|
|
content += chunk.decode("utf-8")
|
|
|
|
try:
|
|
while True:
|
|
content = content.lstrip(" \r\n\t")
|
|
answer, index = json.JSONDecoder().raw_decode(content)
|
|
if "progress" in answer and progress_callback:
|
|
progress_callback("Pulling image {}:{}: {}".format(image, answer["id"], answer["progress"]))
|
|
content = content[index:]
|
|
except ValueError: # Partial JSON
|
|
pass
|
|
response.close()
|
|
if progress_callback:
|
|
progress_callback(f"Success pulling image {image}")
|
|
|
|
async def list_images(self):
|
|
"""
|
|
Gets Docker image list.
|
|
|
|
:returns: list of dicts
|
|
:rtype: list
|
|
"""
|
|
|
|
images = []
|
|
for image in await self.query("GET", "images/json", params={"all": 0}):
|
|
if image["RepoTags"]:
|
|
for tag in image["RepoTags"]:
|
|
if tag != "<none>:<none>":
|
|
images.append({"image": tag})
|
|
return sorted(images, key=lambda i: i["image"])
|