Push Docker images from GitHub Actions to GitHub Container Registry

Pushing with the GitHub Container Registry itself and commands is explained in detail in Procedures for pushing Docker images to GitHub Container Registry (ghcr.io). Please have a look there.



Instructions for pushing a Docker image from GitHub Actions to Docker Hub can be found on GitHub Docs (Procedure Documentation (https://docs.github.com/ja/actions/language-and-framework-guides/publishing-docker-images) )). This time, just use it and point the push destination to the GitHub Container Registry (ghcr.io).

Setting login information for GitHub Container Registry (ghcr.io)

Create a Personal Access Token (PAT) from your GitHub account settings (Procedure Documents (https://docs.github.com/en/github/authenticating-to-github/creating-a-personal-access-) token)). Check read: packages and write: packages as permissions. Save the created PAT in the GitHub repository as an encrypted secret (Procedure Documentation (https://docs.github.com/en/actions/configuring-and-managing-workflows/creating-and-storing) -encrypted-secrets # creating-encrypted-secrets-for-a-repository)). Here, save it with the key CR_PAT.

Creating workflows (GitHub Actions)

Publish images to GitHub Packages Create a workflow by referring to the document. The point to change is --Replace GitHub Packages with GitHub Container Registry --Replace docker.pkg.github.com with ghcr.io --Replace $ {{secrets.GITHUB_TOKEN}} with $ {{secrets.CR_PAT}} --Change the value of repository: to $ {{github.repository}}

Below is the workflow for pushing to GitHub Container Registry (ghcr.io).


name: Publish Docker image
    types: [published]
    name: Push Docker image to GitHub Container Registry
    runs-on: ubuntu-latest
      - name: Check out the repo
        uses: actions/checkout@v2
      - name: Push to GitHub Container Registry
        uses: docker/build-push-action@v1
          username: ${{ github.actor }}
          password: ${{ secrets.CR_PAT }}
          registry: ghcr.io
          repository: ${{ github.repository }}
          tag_with_ref: true
          DOCKER_BUILDKIT: 1


The workflow example above is triggered by publishing a GitHub release, so publish and validate it. The content of the verification is also described in Procedure for pushing Docker image to GitHub Container Registry (ghcr.io), so please refer to that.


I've omitted a lot of explanations about GitHub Container Registry (ghcr.io), but I introduced the workflow to push to GitHub Container Registry (ghcr.io) with GitHub Actions. It's very easy to do, so please take advantage of it.

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