The Error ‘exec format error Mac M1’, is an error that is seen when you are working on AWS and are trying to run your Dokerized application locally.
Given below is the snippet of the error ‘exec user process caused: exec format error’ you might see when you try to deploy your app via AWS ECS/Fargate, and all your containers stop with the error given below:
standard_init_linux.go:219: exec user process caused: exec format error
The error, ‘Exec Format Error Mac M1’ is seen because you are trying to create your photos using the ARM architecture of Apple’s M1 processor. Most likely, Fargate uses the more prevalent Intel x86-64 architecture. Images that you create locally on your Mac won’t function there.
When it comes to various CPU architectures or operating systems, containers are not commonplace. Windows containers cannot be run on Linux (and vice versa), and Linux x86 containers cannot be run on Linux ARM systems.
To fix Exec Format Error Mac M1, use the command docker buildx build –platform=linux/amd64 -t <image-name> in command prompt to fix your error.
An alternative and simplest solution is to have your images automatically build in Docker Hub and error Exec Format Error Mac M1 would be fixed.
One another Alternative using fargate can resolve the issue, Fargate now implements ARM architecture as of 2021-11-23, but finding it can be a little challenging. When establishing a new task definition, make sure to select the “New ECS Experience” so that you can see the option to use ARM.
Methods to Fix Exec Format Error Mac M1
Methods to Fix Exec Format Error Mac M1:
Method 1: Using the docker buildx build Command
One of the shortest and the most effective way to fix the error is to use the command mentioned below to run your application, this will immediately fix your error:
docker buildx build --platform=linux/amd64 -t <image-name>
This should help you fix and understand the error, ‘Exec Format Error Mac M1’.
Building multi-platform images Docker is now making it easier than ever to develop containers on, and for Arm servers and devices. Using the standard Docker tooling and processes, you can start to build, push, pull, and run images seamlessly on different compute architectures. In most cases, you don’t have to make any changes to Dockerfiles or source code to start building for Arm. BuildKit with Buildx is designed to work well for building for multiple platforms and not only for the architecture and operating system that the user invoking the build happens to run. When you invoke a build, you can set the --platform flag to specify the target platform for the build output, (for example, linux/amd64, linux/arm64, or darwin/amd64). When the current builder instance is backed by the docker-container driver, you can specify multiple platforms together. In this case, it builds a manifest list which contains images for all specified architectures. When you use this image in docker run or docker service, Docker picks the correct image based on the node’s platform. You can build multi-platform images using three different strategies that are supported by Buildx and Dockerfiles: Using the QEMU emulation support in the kernel Building on multiple native nodes using the same builder instance Using a stage in Dockerfile to cross-compile to different architectures //Source: https://docs.docker.com/build/building/multi-platform/#build-and-run-multi-architecture-images
Method 2: Using Alternatively Github or Fargate
If the above solution does not fix the error an alternative approach to this is to have your images automatically build in Docker Hub is definitely the simplest solution.
Fargate now supports ARM architecture as of 2021-11-23, albeit it can be difficult to locate. To see the option to use ARM when establishing a new task definition, make sure the “New ECS Experience” is enabled. You can find the documentation for this in the link mentioned here.
This should help you fix and understand the error, Exec Format Error Mac M1.