docker-registry-fun

#!/bin/bash
# Set this in your env:
REGISTRY=<ip addr>

# Get a registry going:
docker run -d -p  5000:5000  --name registry \
  -v /var/lib/docker-registry:/var/lib/registry \
  -e REGISTRY_STORAGE_DELETE_ENABLED=true \
  --restart=always \
  <registry-ip-address>:5000/registry:2
  
# Get repositories
curl -sSL http://${REGISTRY}:5000/v2/_catalog

# Pull everything in the registry
for REPO in $(curl -sSL http://${REGISTRY}:5000/v2/_catalog | \
     jq -r '.repositories[]') ; do docker pull -a $REPO ; done 
     
# Get all tags for an image:
curl -sSL http://${REGISTRY}:5000/v2/<image-name>/tags/list

# Comprehensive list of all images and their corresponding tags, docker CLI-friendly output
 for i in $(curl -sSL http://${REGISTRY}/v2/_catalog | jq -r '.repositories[]'))
      do curl -sSL http://${REGISTRY}/v2/${i}/tags/list | \
         jq -r --arg REGISTRY $REGISTRY/ '$REGISTRY + .name + ":" .tags[]'; done
         
# Delete an image, and then garbage collect (taken from https://gist.github.com/jaytaylor/86d5efaddda926a25fa68c263830dac1 )
name='my-image'
curl -v -sSL -X DELETE "http://${REGISTRY}/v2/${name}/manifests/$(
  curl -sSL -I \
    -H "Accept: application/vnd.docker.distribution.manifest.v2+json" \
       "http://${REGISTRY}/v2/${name}/manifests/$(
         curl -sSL "http://${REGISTRY}/v2/${name}/tags/list" | jq -r '.tags[0]'
)" | awk '$1 == "Docker-Content-Digest:" { print $2 }' |\
   tr -d $'\r' \
)" ; docker exec -it registry bin/registry garbage-collect /etc/docker/registry/config.yml