Multiarchitecture docker build image using bitbucket pipelines

[sathish 2905]

WARNING: The requested image's platform (linux/amd64) does not match the detected host platform (linux/arm64/v8) and no specific platform was requested

56

exec /register: exec format error

Getting this error while using the below bitbucket-pipelines.yml

pipelines:

default:

- step:

name: My Runner

image: atlassian/default-image:4

runs-on:

- linux

- self.hosted

services:

- docker

script:

- echo "Executing on self-hosted runner"

- export DOCKER_CLI_EXPERIMENTAL=enabled # Enable usage of buildx in Docker version < 23

- export BUILDX_VERSION=0.11.0 # define what BUILDX_VERSION to download and install

#- curl -fsSLO #https://github.com/docker/buildx/releases/download/v${BUILDX_VERSION}/buildx-#v${BUILDX_VERSION}.linux-amd64

- mkdir -p $HOME/.docker/cli-plugins/ && mv buildx-v${BUILDX_VERSION}.linux-amd64 $HOME/.docker/cli-plugins/docker-buildx && chmod +x ~/.docker/cli-plugins/docker-buildx # download buildx and move it to the docker plugin folder

- docker run --rm multiarch/qemu-user-static --reset -p yes; docker buildx create --use # setup the QEMU emulation environment

#- echo $DOCKER_HUB_PASS | docker login --username $DOCKER_HUB_USER --password-stdin # login to Dockerhub

- docker buildx build -t $DOCKER_HUB_USER/my_image_multi_arch:my_tag --push --platform linux/amd64,linux/arm64,linux/arm/v7 . # Build multi-architecture image for the platforms provided and push to Dockerhub

definitions:

services:

docker: # Define a custom docker daemon - can only be used with a self-hosted runner

image: docker:dind

[Theodora Boudale]

Hi @sathish 2905 and welcome to the community!

Since the error message mentions that the host platform is linux/arm64/v8, I assume you are running this build on a self-hosted Linux Docker ARM runner. Is that correct?

Do you get this error while one of the build's commands get executed, and if so which one?

I'm not sure which image the command docker buildx build is using, however the docker run command is using the DockerHub image multiarch/qemu-user-static. Checking this image in DockerHub, it looks like it doesn't support ARM architecture:

• https://hub.docker.com/r/multiarch/qemu-user-static/tags?name=latest

You can see on the page above that only linux/amd64 is mentioned for OS/ARCH. So, you can only use this image on a host with linux/amd64.

Kind regards,
Theodora