请问在 wsl2 里创建的 docker 容器怎么访问宿主机？

[Rebron1900]

各位大佬们好。

我在宿主机 8000 端口上拉了个服务， 然后 wsl2 里拉个 docker 容器，网络模式为 --net=host ，但是目前在容器里使用 python 请求宿主机会提示错误。

嵌套为：宿主机 win11 》 wsl2 》 docker 内

测试脚本为：

import requests
html = requests.get('http://host.docker.internal:8000')
print(html.text)

提示的错误信息为：

Traceback (most recent call last):
  File "/usr/local/lib/python3.11/site-packages/urllib3/connection.py", line 174, in _new_conn

    conn = connection.create_connection(
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/urllib3/util/connection.py", line 72, in create_connection
    for res in socket.getaddrinfo(host, port, family, socket.SOCK_STREAM):
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/socket.py", line 961, in getaddrinfo
    for res in _socket.getaddrinfo(host, port, family, type, proto, flags):
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
socket.gaierror: [Errno -2] Name does not resolve

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/lib/python3.11/site-packages/urllib3/connectionpool.py", line 703, in urlopen
    httplib_response = self._make_request(
                    
    r = adapter.send(request, **kwargs)
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/requests/adapters.py", line 565, in send
    raise ConnectionError(e, request=request)
requests.exceptions.ConnectionError: HTTPConnectionPool(host='host.docker.internal', port=8000): Max retries exceeded with url: / (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x7f874bbd4490>: Failed to establish a new connection: [Errno -2] Name does not resolve'))

试过再 wsl2 里访问宿主网络，也无法访问。

请问要用什么姿势操作才能让宿主机、wsl2 、wsl2 里的 docker 正常网络互通呢？

[swulling]

https://learn.microsoft.com/en-us/windows/wsl/networking#accessing-windows-networking-apps-from-linux-host-ip

自己给宿主机的 ip 在 wsl2 的 /etc/hosts 加一条比较方便

[Rebron1900]

@swulling 感谢您的回复，我宿主机的服务发布在 127.0.0.1 上，所以导致容器无法访问。后来改成发到本地局域网 ip 上后能正常访问了。