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Clean Docker Images and Container by Cron Job

article 2025/2/25 5:48:04

1.Cretae a clean_docker_containers.sh to clean containers (status: exited, dead)

#!/bin/bash

# 找到所有状态不正常的容器
containers=$(docker ps -a --filter "status=exited" --filter "status=dead" --format "{{.ID}}")

if [ -z "$containers" ]; then
    echo "No containers to clean."
else
    echo "Cleaning up the following containers:"
    echo "$containers"
    echo

    for container in $containers; do
        echo "Deleting container $container"
        docker rm -f $container
    done
fi

# 设置 Cron Job：crontab -e

2. Create a delete_docker_images.sh to delete images with keyword.

#!/bin/bash

# 检查是否提供了关键词参数
if [ "$#" -ne 1 ]; then
    echo "Usage: $0 <keyword>"
    exit 1
fi

# 关键词参数
KEYWORD=$1

# 找到所有包含关键词的镜像
images=$(docker images --format "{{.Repository}}:{{.Tag}}" | grep ${KEYWORD})

if [ -z "$images" ]; then
    echo "No images found with keyword: ${KEYWORD}"
else
    echo "Images to be deleted:"
    echo "$images"
    echo

    for image in $images; do
        echo "Deleting image $image"
        docker rmi -f $image
    done
fi

3. Create a run_clean_docker.sh to run these shell command as above.

#!/bin/bash

# SET PATH
cd /your-parth/Docker

# 定义日志文件
LOGFILE="./cron.log"

# 记录时间和作者
echo "[$(date '+%Y-%m-%d %H:%M:%S')] Delete Docker Images and Container Script executed" >> ${LOGFILE}

# 运行原先的脚本，并将输出写入日志
./delete_docker_images.sh /your-keyword/ >> ${LOGFILE} 2>&1
./clean_docker_containers.sh >> ${LOGFILE} 2>&1

echo "[$(date '+%Y-%m-%d %H:%M:%S')] End" >> ${LOGFILE}
echo "" >> ${LOGFILE}

4. Set a cron job

4.1 crontab -e


# 第一颗星表示分钟（0-59）第二颗星表示小时（0-23）第三颗星表示一个月中的天（1-31）
# 第四颗星表示月份（1-12）第五颗星表示一周中的天（0-7，星期天可以是0或7）
# 每天8時定期清理 docker images by keyword & container
0 8 * * * /your-path/Docker/run_clean_docker.sh

4.2 cron.log

[2024-11-28 08:00:01] Delete Docker Images and Container Script executed
No images found with keyword: /ccs/
No containers to clean.
[2024-11-28 08:00:01] End

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