执行前须安装jq（json解析工具）

wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo
yum install jq -y

shell脚本如下,需要放置harbor机器执行：

#!/bin/bash
set -e
HARBOR_URL=xxxx.xxxx.xxxx
HARBOR_USER=user
HARBOR_PASSWD=password
#最大保留镜像个数。超过后的删除。
OLD_VERSION_NUM=20

#获取仓库项目列表
function get_projects_list(){
  projects_list=$(curl -s -k -u ${HARBOR_USER}:${HARBOR_PASSWD} "https://${HARBOR_URL}/api/v2.0/projects?page=1&page_size=100")
  mkdir -p $PWD/projectsList
  echo "${projects_list}" | jq '.[]' | jq -r '.name' > $PWD/projectsList/projectsList.txt
}

#获取每个项目下仓库列表
function get_repos_list(){
  mkdir -p $PWD/reposList
  for project in $(cat $PWD/projectsList/projectsList.txt);do
    repos_list=$(curl -s -k -u ${HARBOR_USER}:${HARBOR_PASSWD} "https://${HARBOR_URL}/api/v2.0/projects/${project}/repositories?page=1&page_size=100")
    echo "${repos_list}" | jq '.[]' | jq -r '.name'| awk -F "/" '{print $2}' > $PWD/reposList/${project}.txt
  done
}

#获取每个仓库下镜像digest列表
function get_tag_list(){

  for project in $(cat $PWD/projectsList/projectsList.txt)
  do
    for repo in `cat $PWD/reposList/${project}.txt`
      do
        mkdir -p $PWD/tagsList/$project/$repo
        curl -s -k -u ${HARBOR_USER}:${HARBOR_PASSWD} "https://${HARBOR_URL}/api/v2.0/projects/${project}/repositories/${repo}/artifacts?page=1&page_size=100&with_tag=true&wi
th_label=false&with_scan_overview=false&with_signature=false&with_immutable_status=false" | jq '.[]' | jq -r '.digest' > $PWD/tagsList/$project/$repo/tags.txt
     done
  done
}

#遍历每个项目下每个仓库执行镜像删除
function delete_images(){
  for project in $(cat $PWD/projectsList/projectsList.txt)
  do
    for repo in `cat $PWD/reposList/${project}.txt`
      do
        TOTAL_NUN=`cat $PWD/tagsList/$project/$repo/tags.txt |wc -l `
        if [ $TOTAL_NUN -gt $OLD_VERSION_NUM ];then
            DELETE_NUN=`echo $TOTAL_NUN - $OLD_VERSION_NUM | bc `
            tail -n  $DELETE_NUN $PWD/tagsList/$project/$repo/tags.txt > $PWD/tagsList/$project/$repo/tags-deleted.txt
            echo "################## ${project}/${repo} have $DELETE_NUN images need to delete ###############################################"
            echo "#######################begine delete ${project}/${repo} images###################################"
            for i in `cat $PWD/tagsList/$project/$repo/tags-deleted.txt`
              do
                IMAGE_NAME=`curl -s -k -u ${HARBOR_USER}:${HARBOR_PASSWD} "https://${HARBOR_URL}/api/v2.0/projects/${project}/repositories/${repo}/artifacts/${i}?page=1&page_
size=10&with_tag=true&with_label=false&with_scan_overview=false&with_signature=false&with_immutable_status=false" | jq -r '.tags' | jq -r '.[]' | jq -r '.name'`
                echo "######################### delete image $HARBOR_URL/$project/$repo:$IMAGE_NAME #################"
                curl -X 'DELETE' -u ${HARBOR_USER}:${HARBOR_PASSWD} "https://${HARBOR_URL}/api/v2.0/projects/${project}/repositories/${repo}/artifacts/${i}"
                echo "######################## delete image $HARBOR_URL/$project/$repo:$IMAGE_NAME success #########"
             done
             echo "####################### ${project}/${repo} images have deleted success###################################"
             echo "*********************************************************************************************************"
          fi
     done
  done

}

#启动容器，执行harbor gc 回收
function clean_registry(){
#  image_name=$(docker ps | grep registry | grep photon | awk -F " " '{print $2}')
#  docker run -it --name gc --rm --volumes-from registry ${image_name} garbage-collect  /etc/registry/config.yml
   docker run -it --name gc --rm --volumes-from registry vmware/registry:2.6.2-photon garbage-collect  /etc/registry/config.yml

}

function entrance(){
 get_projects_list
 get_repos_list
 get_tag_list
 delete_images
 clean_registry
}

entrance

定时清理添加定时任务：

crontab -e
00 3 * * * /opt/docker-clean/harbor-clean.sh > /opt/docker-clean/harbor-clean.log 2>&1