exec format error when trying to start container on PI-OS 12 (64 bit)

[JuergenOrth]

Any hint why it doesn't work?

root@pi51:~/docker/mbusd# grep VERSION= /etc/os-release
VERSION="12 (bookworm)"

root@pi51:~/docker/mbusd# cat *l
version: "3"
services:
mbusd:
restart: always
image: 3cky/mbusd
volumes:
- /etc/mbusd.conf:/etc/mbusd.conf
- /dev:/dev
ports:
- 502:502

root@pi51:~/docker/mbusd# docker-compose up
Creating network "mbusd_default" with the default driver
Pulling mbusd (3cky/mbusd:)...
latest: Pulling from 3cky/mbusd
bca4290a9639: Already exists
b6b6114c4de7: Pull complete
Digest: sha256:dae23e3e9ef546850dc9eb0e9bc8e1d11676748866744dbe2df44c11a8fafc8e
Status: Downloaded newer image for 3cky/mbusd:latest
Creating mbusd_mbusd_1 ... done
Attaching to mbusd_mbusd_1
mbusd_1 | exec /usr/bin/mbusd: exec format error

root@pi51:~/docker/mbusd# docker inspect 3cky/mbusd | jq '.[0].Architecture'
"arm64"

root@pi51:~/docker/mbusd#

[G33KatWork]

I am facing the same issue on ARMv7.

The executable in the container is built for x86_64. That can't work:

[andy@energypi ~]$ docker cp elastic_pike:/usr/bin/mbusd .
Successfully copied 66kB to /home/andy/.

[andy@energypi ~]$ file mbusd 
mbusd: ELF 64-bit LSB pie executable, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib/ld-musl-x86_64.so.1, BuildID[sha1]=06c71f037094333c794c7878d528772561896c45, with debug_info, not stripped

I haven't looked into how the container is actually built, so I don't know why this happens.

I can't even get the docker container to build myself without stripping the --platform=$BUILDPLATFORM in the first FROM. I am too dumb to supply that argument it seems.

However, after removing that from the Dockerfile and then running docker build -t 3cky/mbusd:latest . on the ARM machine itself, I got the container to work. That's at least a solution until the build for other architectures than x86 is fixed.

[3cky]

I did some fixes to Dockerfile, please pull latest image and test.