定时清理镜像

方式一：

cat >> /etc/cron.hourly/clean-unuse-images.sh << 'EOF'
#!/usr/bin/env bash

main () {
    (crictl img | grep "<none>") && (crictl img | grep "<none>" | xargs crictl rmi)

    images=( $(crictl img | grep "dev.flyrise.cn" | awk '{print $3}') )
    pods=( $(crictl ps | grep -v IMAGE | awk '{print $2}') )

    for item in "${images[@]}"
    do
      if [[ ! " ${pods[@]} " =~ " $item " ]]; then
        crictl rmi $item
      fi
    done
}

main 2>&1 | tee /var/log/clean-unuse-images.log
EOF

# 必须添加执行权限，否则不会执行
chmod +x /etc/cron.hourly/clean-unuse-images.sh

方式二：

cat >> /etc/cron.hourly/clean-unuse-images.sh << 'EOF'
#!/bin/bash
main () {
    crictl images|grep dev.flyrise|grep "<none>"|awk '{print $3}'|xargs crictl rmi

    filtered_images=$(crictl images | grep "dev.flyrise.cn" | awk '{print $1":"$2}')

    # 遍历每个镜像并删除
    for image in $filtered_images
    do
       running=$(crictl ps -a --image "$image" --quiet)
       if [[ -n $running ]]; then
         echo "已保留镜像: $image"
       else 
         crictl rmi "$image"
         #echo "已删除镜像: $image"
       fi
    done
｝

main 2>&1 | tee /var/log/clean-unuse-images.log
EOF

# 必须添加执行权限，否则不会执行
chmod +x /etc/cron.hourly/clean-unuse-images.sh