docs: copy between registries with buildx

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# Copy images between registries # Copy images between registries
Multi-platform images built using buildx can be copied from one registry to another without [Multi-platform images](https://docs.docker.com/build/building/multi-platform/)
changing the image SHA using the [tag-push-action](https://github.com/akhilerm/tag-push-action). built using Buildx can be copied from one registry to another using the
[`imagetools create` command](https://docs.docker.com/engine/reference/commandline/buildx_imagetools_create/):
The following workflow will first push the image to dockerhub, run some tests using the images
and then push to quay and ghcr
```yaml ```yaml
name: ci name: ci
@ -27,13 +25,12 @@ jobs:
- -
name: Set up Docker Buildx name: Set up Docker Buildx
uses: docker/setup-buildx-action@v2 uses: docker/setup-buildx-action@v2
- # quay and ghcr logins for pushing image after testing -
name: Login to Quay Registry name: Login to Docker Hub
uses: docker/login-action@v2 uses: docker/login-action@v2
with: with:
registry: quay.io username: ${{ secrets.DOCKERHUB_USERNAME }}
username: ${{ secrets.QUAY_USERNAME }} password: ${{ secrets.DOCKERHUB_TOKEN }}
password: ${{ secrets.QUAY_TOKEN }}
- -
name: Login to GitHub Container Registry name: Login to GitHub Container Registry
uses: docker/login-action@v2 uses: docker/login-action@v2
@ -41,12 +38,6 @@ jobs:
registry: ghcr.io registry: ghcr.io
username: ${{ github.repository_owner }} username: ${{ github.repository_owner }}
password: ${{ secrets.GITHUB_TOKEN }} password: ${{ secrets.GITHUB_TOKEN }}
-
name: Login to DockerHub
uses: docker/login-action@v2
with:
username: ${{ secrets.DOCKERHUB_USERNAME }}
password: ${{ secrets.DOCKERHUB_TOKEN }}
- -
name: Build and push name: Build and push
uses: docker/build-push-action@v3 uses: docker/build-push-action@v3
@ -57,17 +48,11 @@ jobs:
tags: | tags: |
user/app:latest user/app:latest
user/app:1.0.0 user/app:1.0.0
- # run tests using image from docker hub -
name: Run Tests name: Push image to GHCR
run: make tests run: |
- # copy multiplatform image from dockerhub to quay and ghcr docker buildx imagetools create \
name: Push Image to multiple registries --tag ghcr.io/user/app:latest \
uses: akhilerm/tag-push-action@v2.0.0 --tag ghcr.io/user/app:1.0.0 \
with: user/app:latest
src: docker.io/user/app:1.0.0
dst: |
quay.io/user/app:latest
quay.io/user/app:1.0.0
ghcr.io/user/app:latest
ghcr.io/user/app:1.0.0
``` ```