Deploying a service on a new machine, I ran into a problem. Some services did not want to start, and the error was very cryptic
$ docker-compose logs
Attaching to foo-service_1, bar_1
foo-service_1 | standard_init_linux.go:211: exec user process caused "exec format error"
bar_1 | standard_init_linux.go:211: exec user process caused "exec format error"
I checked the architecture
$ docker foo image | grep Arch
"Architecture": "arm64",
the server was
$ uname -a
Linux 4.15.0-118-generic 119-Ubuntu SMP x86_64 x86_64 x86_64 GNU/Linux
Solution
Rebuild for the correct arch
docker build --platform ${arch} . \
-t ${docker_namespace}/${docker_project_name}:${arch}-${docker_version} \
-f ${path}/Dockerfile
valid values for arch are
amd64arm64