How to delete docker images older than x days from docker hub using a shell script

docker-registryshell-scripting

How to delete docker images from docker hub using a shell script.

I want to delete all images from docker hub older than past 50 days of a private docker hub account.

Any ideas? Which tools to use while creating and running this shell script from either through Jenkins or bash terminal.

I'm thinking of using curl to achieve my goal.

Best Answer

Below script will delete all images in all repositories of your docker hub account which are older than 50 days.


#!/bin/bash
#Script will delete all images in all repositories of your docker hub account which are older than 50 days

set -e

# set username and password
UNAME="YOUR_USERNAME"
UPASS="YOUR_PASSWORD"

# get token to be able to talk to Docker Hub
TOKEN=$(curl -s -H "Content-Type: application/json" -X POST -d '{"username": "'${UNAME}'", "password": "'${UPASS}'"}' https://hub.docker.com/v2/users/login/ | jq -r .token)

# get list of namespaces accessible by user (not in use right now)
#NAMESPACES=$(curl -s -H "Authorization: JWT ${TOKEN}" https://hub.docker.com/v2/repositories/namespaces/ | jq -r '.namespaces|.[]')

#echo $TOKEN
echo
# get list of repos for that user account
echo "List of Repositories in ${UNAME} Docker Hub account"
sleep 5
REPO_LIST=$(curl -s -H "Authorization: JWT ${TOKEN}" https://hub.docker.com/v2/repositories/${UNAME}/?page_size=10000 | jq -r '.results|.[]|.name')
echo $REPO_LIST
echo
# build a list of all images & tags
for i in ${REPO_LIST}
do
  # get tags for repo
  IMAGE_TAGS=$(curl -s -H "Authorization: JWT ${TOKEN}" https://hub.docker.com/v2/repositories/${UNAME}/${i}/tags/?page_size=10000 | jq -r '.results|.[]|.name')

  # build a list of images from tags
  for j in ${IMAGE_TAGS}
  do
    # add each tag to list
    FULL_IMAGE_LIST="${FULL_IMAGE_LIST} ${UNAME}/${i}:${j}"
      
  done
done

# output list of all docker images
echo
echo "List of all docker images in ${UNAME} Docker Hub account"
sleep 10
for i in ${FULL_IMAGE_LIST}
do
  echo ${i}
done

sleep 10
echo
echo "Identifying and deleting images which are older than 50 days in ${UNAME} docker hub account"
sleep 10
# Note!!! Please un-comment below line if you wanna perform operation on all repositories of your Docker Hub account
#for i in ${REPO_LIST}

for i in randomRepo

#NOTE!!! For deleting Specific repositories images please include only those repositories in for loop  like below for loop which has repos mygninx and mykibana 
#for i in  mynginx mykibana 

do
  # get tags for repo
  echo
  echo "Looping Through $i repository in ${UNAME} account"
  IMAGE_TAGS=$(curl -s -H "Authorization: JWT ${TOKEN}" https://hub.docker.com/v2/repositories/${UNAME}/${i}/tags/?page_size=10000 | jq -r '.results|.[]|.name')

  # build a list of images from tags
  for j in ${IMAGE_TAGS}
  do
      echo
      # add last_updated_time
    updated_time=$(curl -s -H "Authorization: JWT ${TOKEN}" https://hub.docker.com/v2/repositories/${UNAME}/${i}/tags/${j}/?page_size=10000 | jq -r '.last_updated')
    echo $updated_time
    datetime=$updated_time
    timeago='50 days ago'

    dtSec=$(date --date "$datetime" +'%s')
    taSec=$(date --date "$timeago" +'%s')

    echo "INFO: dtSec=$dtSec, taSec=$taSec" 

           if [ $dtSec -lt $taSec ] 
           then
              echo "This image ${UNAME}/${i}:${j} is older than 50 days, deleting this  image"
              ## Please uncomment below line to delete docker hub images of docker hub repositories
              #curl -s  -X DELETE  -H "Authorization: JWT ${TOKEN}" https://hub.docker.com/v2/repositories/${UNAME}/${i}/tags/${j}/
           else
              echo "This image ${UNAME}/${i}:${j} is within 50 days time range, keep this image"
           fi      
  done
done

echo "Script execution ends"
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