Aslinda yapmak istedigimiz iki docker registry arasinda veri kopyalamak, Bunun bir sebebi ilgili projede bir multiarch base image kullaniyor olmamiz ve bu nedenle multiarch base image i dockerhub dan cekip kendi repositorymize koyacagiz ki dockerhub limitleri ile ilgili problem yasamayalim.

Bunun icin gelistirilmis skopeo diye bir tool var.

https://github.com/containers/skopeo

Daha sonra bir registryden digerine kopyalama yapiyoruz.

skopeo copy  --all  \
   --src-creds "$DOCKER_NEXUS_USER:$DOCKER_NEXUS_PASSWORD" \
   --dest-creds "$DOCKER_NEXUS_USER:$DOCKER_NEXUS_PASSWORD"  \
   docker://$NEXUS_URL:9002/tomcat:10.1.44-jre21  \
   docker://n$NEXUS_URL:9005/base-tomcat:10.1.44-jre21

burada –all tüm manifest leri ve ilk docker://…. source ikincisi destination.
Yani birinden alip birine push ediyoruz.
Daha sonra kontron etmek icin

docker buildx imagetools inspect $NEXUS_URL:9005/base-tomcat:10.1.44-jre21|grep arch
com.docker.official-images.bashbrew.arch: amd64
com.docker.official-images.bashbrew.arch: amd64
com.docker.official-images.bashbrew.arch: arm64v8
com.docker.official-images.bashbrew.arch: arm64v8
com.docker.official-images.bashbrew.arch: ppc64le
com.docker.official-images.bashbrew.arch: ppc64le
com.docker.official-images.bashbrew.arch: riscv64
com.docker.official-images.bashbrew.arch: riscv64
com.docker.official-images.bashbrew.arch: s390x
com.docker.official-images.bashbrew.arch: s390x

Birkac örnek.

echo "$NEXUS_REGISTRY_TOKEN" | skopeo login --username "$NEXUS_REGISTRY_USER" --password-stdin "$NEXUS_REGISTRY:$NEXUS_PULL_PORT"

      echo "Copying image from dhi.io to nexus using skopeo..."
      SOURCE_IMAGE="$DHI_REGISTRY/$TOMCAT_IMAGE_NAME:$TOMCAT_TAG"
      TARGET_IMAGE="$NEXUS_REGISTRY:$NEXUS_PUSH_PORT/base-tomcat:$TOMCAT_TAG"
      
      # Copy with latest tag using skopeo
      echo "Copying to latest tag: $TARGET_IMAGE"
      skopeo copy --all \
        docker://$SOURCE_IMAGE \
        docker://$TARGET_IMAGE

Skopeo ile image inspect yaparken gelen degerleri de jq ile karsilastirabiliriz.

NEXUS_REVISION=$(skopeo inspect docker://$NEXUS_REGISTRY:$NEXUS_PULL_PORT/base-tomcat:$TOMCAT_TAG –raw 2>/dev/null | jq -r ‘.annotations[“org.opencontainers.image.revision”]’ || echo “”)