Use host networking while building a VSCode devcontainer

Question

How can I get VSCode to use host networking during the build of the container? In devcontainer.json, I can set

"runArgs": ["--network=host"]

but that only applies to running the container. How can I get VSCode to use host networking during the build of the container?

score 3 · Answer 1 · answered Mar 13 '23 at 11:41

As of now, proper solution does not exist, correspondent PR is open: https://github.com/microsoft/vscode-remote-release/issues/3545

A workaround mentioned in this PR is using initializeCommand in combination with image:

 "initializeCommand": "docker build --network host --tag my-image .",
  "image": "my-image"

Oren_C · Answer 2 · 2023-03-13T14:03:07.310

2

UPDATE 2023

The solution below no longer works. According to a GitHub issue you can use this instead:

"runArgs": [
    "--network=host",
],

You need to add the following in your devcontainer.json file:

    "build": {
        "args": {
            "network": "host"
        }
    }

This property will allow you to use the host network when building.

edited Mar 13 '23 at 14:03

answered Jan 06 '22 at 12:50

Oren_C

3

This doesn't work anymore, it adds `--build-arg network=host` instead of `--network=host` – madhur4127 Jun 03 '22 at 04:54
Sorry for downvoting, but it does not work anymore as stated by @madhur4127 I try to provide the answer below. – Do-do-new Mar 13 '23 at 11:31
Thanks for the update, I have updated the answer to include a working solution. – Oren_C Mar 13 '23 at 14:03
1

@Oren_C As far as I understood, `runArgs` are only for running, and the question is about building – Do-do-new Mar 14 '23 at 16:17

score 0 · Answer 3 · answered Jul 29 '22 at 10:07

I have met a similar problem that I want to use host proxy configuration to build.

I add this in devcontainer.json:

    "build": {
        "args": {
            "HTTP_PROXY": "your_proxy_ip:port",
        }
    }

For other config, you could do the same.

Hope it will be helpful to you.