Unable to Generate Logs and Hanging Execution with unityci/editor Docker Image on Mac with Apple Silicon

[alronz]

I am trying to use the Docker image unityci/editor:ubuntu-2022.3.18f1-webgl-3.0.1 on a Mac with Apple Silicon (M1/M2) to run the following command after setting the license:

unity-editor -enablePackageManagerTraces -logfile /dev/stdout -quit -batchmode -nographics -buildTarget WebGL -projectPath "/src/Frontend"

Problem Description:

• When I build the Docker image on Linux or Windows that contains the above command, I observe that the command produces many logs and executes successfully.
• However, when I build the image using the same command on a Mac with an Apple chip (M1/M2), I encounter the following issues:
  • The command produces no logs.
  • The execution appears to hang without completing.

Note that I execute the docker build command with the flag --platform=linux/amd64 since there is no image for arm64

I would appreciate any insights or guidance on how to resolve this issue and make the Docker image work smoothly on Macs with Apple Silicon. Thank you!

[GabLeRoux]

That's a good question, I reproduced this as well. I haven't tried building my own docker image locally on Apple chip (M3 here), but I did reproduce the problem where trying to run unity-editor inside a container and the process did hang without printing anything to console. I even tried with base image (without modules installed).

export DOCKER_DEFAULT_PLATFORM=linux/amd64
docker run -v "$(pwd):/app" --rm docker.io/unityci/editor:2022.3.4f1-base-3 unity-editor \
  -logFile /dev/stdout \
  -quit \
  -serial "$UNITY_SERIAL" \
  -username "$UNITY_EMAIL" \
  -password "$UNITY_PASSWORD" \
  -projectPath "/app/BlankProject"

I'm interested in a solution too. That is an architecture compatibility challenge. I quickly eplored some options.

Rosetta 2

I know there is Rosetta 2, a binary translation layer for running x86_64 applications on ARM architecture. Rosetta can be installed like this:

/usr/sbin/softwareupdate --install-rosetta --agree-to-license

But from there, I'm not sure what would be the next steps, I haven't tried anything past this, but I think running with DOCKER_DEFAULT_PLATFORM=linux/amd64 or --platform=linux/amd64 is already using Rosetta.

edit: emulation on macOS usign docker uses QEMU, not Rosetta

Writing a Dockerfile that is ARM compatible

I think for this to work, we'd have to try and use a base image that is already arm compatible and then compile and install dependencies. This is something to explore.

References

• https://github.com/game-ci/docker/blob/main/images/ubuntu/base/Dockerfile

[GabLeRoux]

I did some more investigation on this. You can find a discussion here:
https://discord.com/channels/710946343828455455/1295781822214443038

Right now, this is blocked because there are no arm64 unityhub binaries available:
https://hub-dist.unity3d.com/ui/repos/tree/General/hub-debian-prod-local/pool/main/u/unity/unityhub_amd64/unityhub-amd64-3.9.1.deb

I was able to get the base image to build, but not the hub image.

I did this change for the base image for it to build on arm:

diff --git a/images/ubuntu/base/Dockerfile b/images/ubuntu/base/Dockerfile
index b4d75c6..3e0d8bb 100644
--- a/images/ubuntu/base/Dockerfile
+++ b/images/ubuntu/base/Dockerfile
@@ -59,9 +59,10 @@ RUN apt-get -q update \
 
 # Fix "No useable version of libssl" for Ubuntu 22.04
 # https://forum.unity.com/threads/workaround-for-libssl-issue-on-ubuntu-22-04.1271405/
-RUN wget http://security.ubuntu.com/ubuntu/pool/main/o/openssl/libssl1.1_1.1.1f-1ubuntu2_amd64.deb \
- && dpkg -i libssl1.1_1.1.1f-1ubuntu2_amd64.deb \
- && rm libssl1.1_1.1.1f-1ubuntu2_amd64.deb
+RUN apt update && \
+    apt install -y libssl3 && \
+    apt-get clean && \
+    rm -rf /var/lib/apt/lists/*
 
 # Disable default sound card, which removes ALSA warnings
 RUN /bin/echo -e 'pcm.!default {\n\

But I'm not sure the change is good at all because maybe the libssl1.1 is actually required. Anyway, this part would need to change to become arm compatible.

[gitperr]

I think we may need to pull the unity hub down from Unity's own page in this case.

https://unity.com/download has a link to Download for mac