Delete Docker images on DockerHub

delete-dockerhub-images.sh

#!/bin/bash
# TODO: Tidy up! - Karl

# Based on kizbitz/dockerhub-v2-api-organization.sh at https://gist.github.com/kizbitz/175be06d0fbbb39bc9bfa6c0cb0d4721

# Example for the Docker Hub V2 API
# Returns all images and tags associated with a Docker Hub organization account.
# Requires 'jq': https://stedolan.github.io/jq/

# set username, password, and organization
username="changeme"
password='changeme'
org="changeme"
keep_tags="^v-.*|stable|docker|demo|latest"
delete_tags="^git-.*$|^[a-zA-Z0-9]{40}$"

# -------

# Safe shell scripts, exit if error, unset variables, disable file expansion globbing (may break things), exit if any failure.
set -euf -o pipefail

# get token
echo "Retrieving token ..."
token=$(curl -s -H "Content-Type: application/json" -X POST -d '{"username": "'${username}'", "password": "'${password}'"}' https://hub.docker.com/v2/users/login/ | jq -r .token)

# get list of repositories
echo "Retrieving repository list ..."
repo_list=$(curl -s -H "Authorization: JWT ${token}" "https://hub.docker.com/v2/repositories/${org}/?page_size=200" | jq -r '.results|.[]|.name')

# delete images and/or tags
for repo in ${repo_list}
do
	echo "Retrieving images and tags for organization: ${org}/${repo}"

	# Delete repo (all)
	# curl -X DELETE -s -H "Authorization: JWT ${token}" "https://hub.docker.com/v2/repositories/${org}/${i}/"

	# Delete by tags

	# Retrieve list of tags - newest image first
	image_tags=$(curl -s -H "Authorization: JWT ${token}" "https://hub.docker.com/v2/repositories/${org}/${repo}/tags/?page_size=300" | jq -r '.results|.[]|.name')

	# echo "${image_tags}"
	images_to_delete_count=0
	images_to_keep_count=0

	echo "Dry run check what images should keep or delete..."
  # We should really build an array of image tags to delete here.
	for image in ${image_tags}
	do
		echo -n "Checking image: ${image} ... "
		if [[ ${image} =~ ^(${delete_tags})$ ]] && [[ ! ${image} =~ ^(${keep_tags})$ ]]
		then
			echo "delete" 
			images_to_delete_count=$((images_to_delete_count+1))
		else	
			echo "keep"
			images_to_keep_count=$((images_to_keep_count+1))
		fi
	done

	if [[ ${images_to_delete_count} -eq 0 ]]
	then
		echo "Status: Keep: ${images_to_keep_count} images. Delete: ${images_to_delete_count} images. Moving on to next repo..."
	else
		echo "Status: Keep: ${images_to_keep_count} images. Delete: ${images_to_delete_count} images."
		echo "Confirmation Required: Proceed with deleting ${images_to_delete_count} images marked 'delete'? y/n"
		read -r proceed

		if [[ ${proceed} == "y" ]]
		then
			for image in ${image_tags}
			do
				if [[ ${image} =~ ^(${delete_tags})$ ]] && [[ ! ${image} =~ ^(${keep_tags})$ ]]
				then
					echo -e "\nDeleting: https://hub.docker.com/v2/repositories/${org}/${repo}/tags/${image}/"
					curl -X DELETE -s -H "Authorization: JWT ${token}" "https://hub.docker.com/v2/repositories/${org}/${repo}/tags/${image}/"
				fi	
			done
		fi
		echo ""
	fi
done