restore DTR images from registry volume backup

readme.md

• log in to DTR from local client

docker login <dtr-url>

• (optional) create a volume to hold our old images

docker volume create registry
cp -r /path/to/registry/backup/_data /var/lib/docker/volumes/registry/.

• stand up a docker/registry:v2 locally:

# using docker volume
docker run -v registry:/var/lib/registry -d -p 5000:5000 --name registry registry:2

# mounting the registry data directly from filesystem
docker run -v /path/to/registry/backup:/var/lib/registry -d -p 5000:5000 --name registry registry:2

• curl the registry and check for repos and tags:

for repo in $(curl -SsL http://localhost:5000/v2/_catalog | jq -r '.repositories[]')
do 
  curl -SsL http://localhost:5000/v2/$repo/tags/list 
done | jq '.'

• iterate over the repositories dir in the filesystem and create repos:

# 1) navigate to root of repositories folder
# if using docker volume
cd /var/lib/docker/volumes/registry/_data/docker/registry/v2/repositories
# if using filesystem path
cd /path/to/registry/volume/_data/docker/registry/v2/repositories

# 2) grind on the namespace/repo combinations:

#!/bin/bash
DTR_URL="dtr.local.antiskub.net"
ADMIN="admin"
PASSWORD="orca1234"
BEARER_TOKEN=$(curl -kLsS -u $ADMIN:$PASSWORD "https://$DTR_URL/auth/token" | jq -r '.token')
CURLOPTS=(-kLsS -H 'accept: application/json' -H 'content-type: application/json' -H "Authorization: Bearer ${BEARER_TOKEN}")

for NS in $( find * -maxdepth 0  -type d ); do
  cd $NS
  for REPO in $( find * -maxdepth 0  -type d ); do
    curl "${CURLOPTS[@]}" -X POST -d \
    "{\
    \"name\": \"$REPO\",\
    \"shortDescription\": \"$REPO\",\
    \"longDescription\": \"$REPO\",\
    \"visibility\": \"public\",\
    \"scanOnPush\": false,\
    \"immutableTags\": false,\
    \"enableManifestLists\": true\
    }" "https://${DTR_URL}/api/v0/repositories/$NS"
  done
  cd ..
done

• next, pull list of repos/tags from old registry, tag them, and push them into DTR

for repo in $(curl -SsL http://localhost:5000/v2/_catalog | jq -r '.repositories[]')
do
  curl -SsL http://localhost:5000/v2/$repo/tags/list; done | jq -r '. | { name: .name, tags: .tags[] } | "\(.name, .tags)"' | while read -r repo
  do
    read -r tag
    echo "pulling ${repo}:${tag} from OSS registry"
    docker pull "localhost:5000/${repo}:${tag}"
    echo "tagging ${repo}:${tag} as ${DTR_URL}/${repo}:${tag}"
    docker tag "localhost:5000/${repo}:${tag}" "${DTR_URL}/${repo}:${tag}"
    echo "pushing ${DTR_URL}/${repo}:${tag}"
    docker push "${DTR_URL}/${repo}:${tag}"
    echo "delete localhost:5000/${repo}:${tag} from local cache"
    docker rmi "localhost:5000/${repo}:${tag}"
  done
done