Azure IoT Edge – exec user process caused “exec format error”

If running Edge on a Raspberry Pi and an Edge container’s logs show ‘exec user process caused “exec format error”‘ as an error then most likely you are running a non Raspberry Pi container on the Raspberry Pi. If the docker file used to build the container starts with:

FROM microsoft/dotnet:2.0.0-runtime

or

FROM microsoft/dotnet:2.0.0-runtime-nanoserver-1709

then the line above should be changed to one of the following:

FROM microsoft/dotnet:2.0.5-runtime-stretch-arm32v7
FROM microsoft/dotnet:2.0-runtime-stretch-arm32v7
FROM microsoft/dotnet:2.0.5-runtime-deps-stretch-arm32v7
FROM microsoft/dotnet:2.0-runtime-deps-stretch-arm32v7