Question 185574 in Docker Question posted in
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Go Cloud Code/Docker on M1 Mac exec format error

I’m trying to use GoLand/Cloud Code to build a Golang microservice. But I can’t seem to get the Dockerfile nailed down.

FROM --platform=linux/arm64 golang:1.20-alpine  AS build_base
RUN apk add --no-cache git

# Set the Current Working Directory inside the container
WORKDIR /tmp/wave-service

# We want to populate the module cache based on the go.{mod,sum} files.
COPY go.mod .
COPY go.sum .

RUN go mod download

COPY . .

# Unit tests
# CGO_ENABLED=0 go test -v

# Build the Go app
RUN CGO_ENABLED=0 GOOS=linux GOARCH=arm64 go build -o ./out/wave-service ./wave_microservice.go

# Start fresh from a smaller image
FROM --platform=linux/arm64 golang:1.20-alpine
RUN apk add ca-certificates

COPY --from=build_base /tmp/wave-service/out/wave-service /app/wave-service
RUN chmod a+x /app/wave-service

# This container exposes port 8080 to the outside world
EXPOSE 8080

# Run the binary program produced by `go install`
CMD ["/app/wave-service"]

Returns the error

Waiting for deployments to stabilize...
 - deployment/wave-service: container wave-service-container is backing off waiting to restart
    - pod/wave-service-565995d854-hwhsm: container wave-service-container is backing off waiting to restart
      > [wave-service-565995d854-hwhsm wave-service-container] exec /app/wave-service: exec format error

I’ve tried playing around with architectures and OS variables, but I can’t seem to find what’s going on here.

EDIT:

skaffold.yml

apiVersion: skaffold/v4beta5
kind: Config
build:
  artifacts:
    - image: wave-service
      context: wave-service
      platforms: ["linux/amd64"]
      docker:
        dockerfile: Dockerfile

manifests:
  rawYaml:
    - k8s-pod.yaml

k8s-pod.yaml

apiVersion: v1
kind: Pod
metadata:
  name: wave-service
spec:
  containers:
    - name: wave-service
      image: wave-service
Tags:

2

Answers


  1. Chosen as BEST ANSWER
    0

    So the problem wasn't docker, it was my main go file. It wasn't using the package main so go never found the proper entry point to compile, Changing that worked!


  2. 0

    The issue is related to the fact M1 Mac doesn’t allow to deploy images built for amd64 because they are not compatible with arm64.

    What you need to do is to force the trustBuilder to deploy with buildpacks. Setting trustBuilder=true instructs the pack library to trust the lifecycle binary that is inside the builder image, by mounting the registry credentials into the image and allowing it to perform the image export. In this way, all buildpacks can see the credentials.

    In your skaffold.yml file add the trustBuilder option:

    build:
  artifacts:
    - image: wave-service
      buildpacks:
        builder: gcr.io/buildpacks/builder:v1
        trustBuilder: true

    For completeness, I point out the github issue related to the fix added in the latest versions of skaffold to check the commit code that solved the issue.

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