# 启动Docker服务
sudo systemctl start docker
sudo systemctl enable docker

# 验证Docker服务状态
sudo systemctl status docker
● docker.service – Docker Application Container Engine
Loaded: loaded (/usr/lib/systemd/system/docker.service; enabled; vendor preset: disabled)
Active: active (running) since Thu 2026-03-31 10:00:00 CST; 1min ago
Docs: https://docs.docker.com
Process: 12345 ExecStart=/usr/bin/dockerd -H fd:// –containerd=/run/containerd/containerd.sock (code=exited, status=0/SUCCESS)
Main PID: 12346 (dockerd)
Tasks: 8
Memory: 36.2M
CGroup: /system.slice/docker.service
└─12346 /usr/bin/dockerd -H fd:// –containerd=/run/containerd/containerd.sock

Mar 31 10:00:00 fgedudb01 systemd[1]: Starting Docker Application Container Engine…
Mar 31 10:00:00 fgedudb01 dockerd[12345]: time=”2026-03-31T10:00:00+08:00″ level=info msg=”Starting up”
Mar 31 10:00:00 fgedudb01 systemd[1]: Started Docker Application Container Engine.

# 添加以下内容
{
“registry-mirrors”: [“https://registry.docker-cn.com”, “https://docker.mirrors.ustc.edu.cn”],
“storage-driver”: “overlay2”,
“log-driver”: “json-file”,
“log-opts”: {
“max-size”: “10m”,
“max-file”: “3”
}
}

# 重启Docker服务
sudo systemctl daemon-reload
sudo systemctl restart docker

# 验证配置
sudo docker info | grep Registry

# 运行测试容器
sudo docker run hello-world

Hello from Docker!
This message shows that your installation appears to be working correctly.

To generate this message, Docker took the following steps:
1. The Docker client contacted the Docker daemon.
2. The Docker daemon pulled the “hello-world” image from the Docker Hub.
(amd64)
3. The Docker daemon created a new container from that image which runs the
executable that produces the output you are currently reading.
4. The Docker daemon streamed that output to the Docker client, which sent it
to your terminal.

To try something more ambitious, you can run an Ubuntu container with:
$ docker run -it ubuntu bash

Share images, automate workflows, and more with a free Docker ID:
https://hub.docker.com/

For more examples and ideas, visit:
https://docs.docker.com/get-started/

# 备份Docker镜像
sudo docker save -o /backup/docker/docker_images.tar $(sudo docker images -q)

# 备份Docker容器
sudo docker export -o /backup/docker/docker_container.tar container_name

# 备份Docker卷
sudo cp -r /var/lib/docker/volumes /backup/docker/

# 验证备份文件
ls -la /backup/docker/
drwxr-xr-x 4 root root 4096 Mar 31 10:20 .
drwxr-xr-x 3 root root 4096 Mar 31 10:15 ..
drwxr-xr-x 3 root root 4096 Mar 31 10:20 volumes
-rw-r–r– 1 root root 123456789 Mar 31 10:20 docker_images.tar
-rw-r–r– 1 root root 12345678 Mar 31 10:20 docker_container.tar

#!/bin/bash

DATE=$(date +%Y%m%d)
BACKUP_DIR=”/backup/docker”

# 创建备份目录（如果不存在）
mkdir -p $BACKUP_DIR

# 执行备份
sudo docker save -o $BACKUP_DIR/docker_images_$DATE.tar $(sudo docker images -q)
sudo cp -r /var/lib/docker/volumes $BACKUP_DIR/volumes_$DATE

# 保留最近7天的备份
find $BACKUP_DIR -name “docker_images_*.tar” -mtime +7 -delete
find $BACKUP_DIR -name “volumes_*” -mtime +7 -delete

# 给脚本添加执行权限
chmod +x /root/backup_docker.sh

# 添加到crontab
crontab -e

# 添加以下内容（每天凌晨2点执行备份）
0 2 * * * /root/backup_docker.sh

# 2. 停止Docker服务
sudo systemctl stop docker

# 3. 升级Docker
sudo dnf update docker-ce docker-ce-cli containerd.io

# 4. 启动Docker服务
sudo systemctl start docker

# 5. 验证升级结果
sudo docker –version
Docker version 20.10.24, build 297e128

# 6. 运行测试容器
sudo docker run hello-world

# 1. 在旧服务器上创建备份
sudo docker save -o /backup/docker/docker_images.tar $(sudo docker images -q)
sudo cp -r /var/lib/docker/volumes /backup/docker/

# 2. 将备份文件复制到新服务器
scp -r /backup/docker root@new-server:/backup/

# 3. 在新服务器上安装Docker
# 按照安装步骤在新服务器上安装Docker

# 4. 导入Docker数据
sudo docker load -i /backup/docker/docker_images.tar
sudo cp -r /backup/docker/volumes /var/lib/docker/

# 5. 启动Docker服务
sudo systemctl start docker

# 6. 验证迁移结果
sudo docker –version
sudo docker images