Script to push and pull all images from nexus to harbor - docker

Question

i want to pull from nexus all images and push them in harbor i try to do that
docker login -u -p https://harbor.domaine.com/
docker tag nexus.domaine.com/tag:number harbor.domaine.com/project_name/tag:number
but the problem is that i have a lot of images and if i do this operation i need to write 1 line for every images so i want something like a loop too pull and push all images from nexus any help ?!

Answer 1

You can try use bash script, for example
#!/bin/bash
docker login -u -p https://harbor.domaine.com/
for image_name in $(docker images --format="{{.Repository}}:{{.Tag}}" | grep nexus.domaine.com)
do
new_image_name=$(echo $image_name | sed 's/nexus.domaine.com/harbor.domaine.com\/project_name/')
docker tag $image_name $new_image_name
docker push $new_image_name
done

Answer 2

I've been developing regsync to do exactly this. For a quick start, there's a workshop I recently gave at the docker all-hands, which includes not only the copy, but also the cleanup steps, or there's the quick start in the project itself.
To implement, create a regsync.yml:
version: 1
creds:
- registry: nexus.domaine.com
# credentials here
- registry: harbor.domaine.com
# credentials here
defaults:
parallel: 2
interval: 60m
sync:
- source: nexus.domaine.com/image
target: harbor.domaine.com/project_name/image
type: repository
And then run regsync:
docker container run -it --rm \
-v "$(pwd)/regsync.yml:/home/appuser/regsync.yml:ro" \
regclient/regsync:latest -c /home/appuser/regsync.yml once