Apple Silicon (ARM64) – QGIS Map Server container causes 504 Gateway Timeout / killed stalled process

[xtvard02]

Description

When running lizmap-docker-compose on Apple Silicon (ARM64, tested on Apple M4), the qgis-map-server container consistently fails during WMS GetMap requests.

The request is accepted by QGIS Server, but after ~30 seconds the worker process is killed and Lizmap returns a 504 Gateway Timeout.

This happens even with a minimal project:

• Single GeoJSON layer
• Single feature
• File size ~5 KB
• No complex styling

The same project runs correctly:

• On Intel Mac (x86_64)
• On Synology DS920+ (Intel x86_64)

So the issue appears to be architecture-related.

Environment

Host: Apple M4 (ARM64)

• OS: macOS (Apple Silicon)
• Docker Desktop
• lizmap-docker-compose (official repo)
• Images pulled via:

  ./configure.sh configure
  docker compose pull
  docker compose up -d

Observed behavior

WMS request example:

GET /ows/?SERVICE=WMS&REQUEST=GetMap...

Container logs show:

QGIS Request accepted
...
Killed stalled process
Request timeout error
504 Gateway Timeout

Full log excerpt:

Killed stalled process 61
Request timeout error
504 POST /ows/

Important observation

The image 3liz/qgis-map-server:ltr-rc appears to be amd64-only.

On Apple Silicon, Docker runs it via emulation (QEMU), which likely causes:

• Very slow rendering
• Worker timeout
• Process being killed
• 504 from nginx

Running the same stack on x86_64 works without any modification.

Questions

1. Is 3liz/qgis-map-server officially supported on ARM64?
2. Are there plans to publish multi-arch images (linux/arm64)?
3. Is there a recommended way to run lizmap-docker-compose natively on Apple Silicon?

Expected behavior

Either:

• Official ARM64 images for QGIS Map Server and PostGIS
• Or documented workaround for Apple Silicon users

If needed, I can provide additional logs or test a proposed ARM64 build.

[dmarteau]

Is 3liz/qgis-map-server officially supported on ARM64?

No.

Qgis map server is py-qgis-server python code on top of pyQgis. It requires Posix compliant OS. You always have the possibility to run py-qgis-server as standard python module: https://pypi.org/project/py-qgis-server/ on top of a local QGIS installation.

Are there plans to publish multi-arch images (linux/arm64)?

No, the images are built on official Qgis Debian/Ubuntu packages for conveniency. Building image for arm64 would require cross-compiling QGIS for this architecture, we don't do that.

Is there a recommended way to run lizmap-docker-compose natively on Apple Silicon?

No, atm, QEMU is merely the only alternatiive if you want to stick to Docker. On the other hand, if you can find/build a prebuilt QGIS image for ARM64, you may derive it and install directly the py-qgis-server python package.