Latest not linked to the highest version

[xezpeleta]

Behaviour

Steps to reproduce this issue

1. I configure the metadata-action workflow in my repo with semantic version, as described in the instuctions
2. I publish a new tag: v2.0.1 - this will trigger the action and a new Docker image will be generated with the following tags: 2.0.1, 2.0, 2 and latest
3. Then I publish another tag: v1.9.1 - this will trigger the action and a new Docker image will be generated with the following tags: 1.9.1, 1.9, 1 and latest

Expected behaviour

I want to have the "latest" tag always linked to the highest version (v2.0.1)

Actual behaviour

If I publish a revision of an older version (v1.9.1) it will overwrite the "latest" version.

Is this deliberate? Is there any workaround?

Thanks

[crazy-max]

@xezpeleta

Is this deliberate?

This is the expected behavior if you maintain multiple versions. And indeed, this is not really wise in your case.

Is there any workaround?

You can tell the action to only create latest for v2.x.x tags will the following flavor:

flavor: |
  latest=${{ startsWith(github.ref, 'refs/tags/v2.') }}

Btw can you post your workflow or do you have a link to your repo please?

[xezpeleta]

Great! that's a good workaround. I confirm it's working.

Btw can you post your workflow or do you have a link to your repo please?

I'm testing the workflow on my fork:

name: Publish Docker images
on:
  push:
    tags:
      - 'v*'

jobs:
  main:
    runs-on: ubuntu-latest
    steps:
    -
      name: Checkout
      uses: actions/checkout@v2
    -
      name: Docker meta
      id: meta
      uses: docker/metadata-action@v3
      with:
        images: |
          xezpeleta/elkarbackup
          ghcr.io/xezpeleta/elkarbackup
        # generate Docker tags based on the following events/attributes
        tags: |
          type=semver,pattern={{version}}
          type=semver,pattern={{major}}.{{minor}}
          type=semver,pattern={{major}}
        # WARNING: releasing older versions will overwrite "latest" tag
        # We can specify our preferred "latest" version manually in that case:
        flavor: |
          latest=${{ startsWith(github.ref, 'refs/tags/v2') }}
    -
      name: Set up Quemu
      uses: docker/setup-qemu-action@v1
    -
      name: Set up Docker Buildx
      uses: docker/setup-buildx-action@v1
    -
      name: Login to DockerHub
      uses: docker/login-action@v1 
      with:
        username: ${{ secrets.DOCKERHUB_USERNAME }}
        password: ${{ secrets.DOCKERHUB_TOKEN }}
    -
      name: Login to GHCR
      uses: docker/login-action@v1
      with:
        registry: ghcr.io
        username: ${{ github.repository_owner }}
        password: ${{ secrets.GITHUB_TOKEN }}
    -
      name: Build and push
      id: docker_build
      uses: docker/build-push-action@v2
      with:
        context: .
        file: ./docker/Dockerfile
        push: true
        platforms: linux/amd64,linux/arm64,linux/arm/v7
        tags: ${{ steps.meta.outputs.tags }}
        labels: ${{ steps.meta.outputs.labels }}
    -
      name: Image digest
      run: echo ${{ steps.docker_build.outputs.digest }}

https://github.com/xezpeleta/elkarbackup/blob/master/.github/workflows/publish-docker-images.yml

Thank you very much