My biggest pain while moving to Apple Silicon M1 chip mac book was to create a docker build that would work on all the machines. It took some time for me to figure out how I can create docker images and share on docker hub that would work across different platforms.
By default Docker on M1 macbook would create
linux/arm64 images, which would work only on the machines that are using ARM architecture. But intel based machines uses AMD architecture. As a result docker images built on m1 macbook might not work on intel based machines.
It might not even work on gcloud / aws k8s clusters 😄
But the good part is that m1 chip macbook supports
linux/amd64 images, so we might only need to build docker images using
Let me demonstrate an example here:
Consider you have a Golang Application and you need Docker image for that
So your Dockerfile might look like
FROM golang:1.16-alpine as builder WORKDIR /app COPY . . RUN go build && \ chmod 777 docker-demo FROM alpine:latest WORKDIR /root/ COPY --from=builder /app/docker-demo . CMD [ "./docker-demo" ]
Note this is just an example you can have any Dockerfile😄
Now the command to build should add
--platform flag with the correct platform that you want to build docker image for.
docker build --platform linux/amd64 -t lakhansamani/docker-demo .
Thats all 😅
Now you can publish your docker image on docker hub and share with people.
You can find demo code on this github repository