Description
What happened?
I created a dynamic environment variable inside my WSL2 installation with:
echo 'export DISPLAY=$(grep nameserver /etc/resolv.conf | awk "{print \$2}"):0.0' >> ~/.bashrc
I have tried the following configurations inside my devcontainer.json:
...
"remoteEnv": {
"DISPLAY": "${localEnv:DISPLAY}"
},
"runArgs": [
"--volume", "/tmp/.X11-unix:/tmp/.X11-unix"
],
...
and
...
"runArgs": [
"--env", "DISPLAY",
"--volume", "/tmp/.X11-unix:/tmp/.X11-unix"
],
...
But the variable is always empty inside the container.
What did you expect to happen instead?
When I run the following command inside the devcontainer, I should get a similar result:
vscode ➜ /workspaces/image-processing (main) $ echo $DISPLAY
192.168.160.1:0.0
Which has the same value if I run the same command in WSL2.
How can we reproduce the bug? (as minimally and precisely as possible)
My devcontainer.json:
{
"build": {
"dockerfile": "Dockerfile",
"context": "..",
"args": {
"VARIANT": "3.10-bullseye",
// Options
"NODE_VERSION": "lts/*"
}
},
"remoteEnv": {
"DISPLAY": "${localEnv:DISPLAY}"
},
"runArgs": [
"--volume", "/tmp/.X11-unix:/tmp/.X11-unix"
],
"remoteUser": "vscode"
}
My Dockerfile:
ARG VARIANT=3-bullseye
FROM mcr.microsoft.com/vscode/devcontainers/python:${VARIANT}
# [Choice] Node.js version: none, lts/*, 16, 14, 12, 10
ARG NODE_VERSION="none"
RUN if [ "${NODE_VERSION}" != "none" ]; then su vscode -c "umask 0002 && . /usr/local/share/nvm/nvm.sh && nvm install ${NODE_VERSION} 2>&1"; fi
ENV DISPLAY=${DISPLAY}
# [Optional] If your pip requirements rarely change, uncomment this section to add them to the image.
# COPY requirements.txt /tmp/pip-tmp/
RUN pip3 --disable-pip-version-check --no-cache-dir install opencv-python==4.11.0.86 \
&& rm -rf /tmp/pip-tmp
# [Optional] Uncomment this section to install additional OS packages.
RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
&& apt-get purge -y imagemagick imagemagick-6-common \
&& apt-get -y install --no-install-recommends \
libopencv-dev \
python3-opencv
# [Optional] Uncomment this line to install global node packages.
# RUN su vscode -c "source /usr/local/share/nvm/nvm.sh && npm install -g <your-package-here>" 2>&1
Run in WSL:
echo 'export DISPLAY=$(grep nameserver /etc/resolv.conf | awk "{print \$2}"):0.0' >> ~/.bashrc
Once executed the devcontainer, try to run:
vscode ➜ /workspaces/image-processing (main) $ echo $DISPLAY
It should come back empty
Local Environment:
- DevPod Version: 0.6.1
- Operating System: windows
- ARCH of the OS: AMD64
DevPod Provider:
- Local/remote provider: docker
Anything else we need to know?
If I add the variable to Powershell using :
$DISPLAY_IP = wsl cat /etc/resolv.conf | Select-String "nameserver" | ForEach-Object { $_ -replace "nameserver\s+", "" }
$env:DISPLAY = "$DISPLAY_IP`:0.0"
and run it using
devpod up --workspace-env DISPLAY=$env:DISPLAY <<DEVPOD_CONTAINER_NAME>>
It works! It seems that the GUI is not picking the variables inside ~/.bashrc