centos7强制升级docker

一.安装成功验证

​ 此次在centos7下升级docker版本主要是为解决以下问题：Docker 安装MySQL8镜像出现：The designated data directory /var/lib/mysql/ is unusable.排查很久发现是docker版本的原因。

旧版本：

新版本：

二.删除旧版本

#停止服务
sudo systemctl stop docker docker.socket containerd

#卸载 Docker 软件包：卷,镜像等可不卸载，卸载了就没有了，还要重新下载
sudo rm -rf /usr/local/bin/docker*
sudo rm -rf /usr/local/bin/containerd*
sudo rm -rf /usr/local/bin/runc

#验证
which docker
# 检查残留文件 卷,镜像，配置文件不卸载，会有输出
ls /var/lib | grep docker      # 应无输出
ls /etc | grep docker         # 应无输出
ls /usr/local/bin | grep docker  # 应无输出

三.强制安装最新版

2.1 下载最新静态二进制包

# 创建目录
mkdir -p ~/docker-latest && cd ~/docker-latest

# 下载 Docker 24.x 静态包（示例）
wget https://download.docker.com/linux/static/stable/x86_64/docker-24.0.7.tgz

# 解压到系统路径
sudo tar xzvf docker-*.tgz --strip-components=1 -C /usr/local/bin

2.2 安装依赖

# 下载最新 containerd 和 runc
wget https://github.com/containerd/containerd/releases/download/v1.7.12/containerd-1.7.12-linux-amd64.tar.gz
wget https://github.com/opencontainers/runc/releases/download/v1.1.12/runc.amd64

# 安装
 sudo tar xzvf containerd-*.tar.gz -C /usr/local/bin
 sudo install -m 755 runc.amd64 /usr/local/sbin/runc

2.3 配置 systemd 服务

# 注意：需根据新版 Docker 调整配置参数
sudo vim /etc/systemd/system/docker.service

[Unit]
Description=Docker Application Container Engine
Documentation=https://docs.docker.com
After=network-online.target firewalld.service containerd.service
Wants=network-online.target
Requires=docker.socket containerd.service

[Service]
Type=notify
ExecStart=/usr/local/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock
ExecReload=/bin/kill -s HUP $MAINPID
TimeoutSec=0
RestartSec=2
Restart=always
StartLimitBurst=3
StartLimitInterval=60s
LimitNOFILE=infinity
LimitNPROC=infinity
LimitCORE=infinity
TasksMax=infinity
Delegate=yes
KillMode=process

[Install]
WantedBy=multi-user.target

2.4 创建 containerd 服务文件

sudo vi /etc/systemd/system/containerd.service

[Unit]
Description=containerd container runtime
Documentation=https://containerd.io
After=network.target

[Service]
ExecStartPre=-/sbin/modprobe overlay
ExecStart=/usr/local/bin/containerd
Restart=always
RestartSec=5
Delegate=yes
KillMode=process
OOMScoreAdjust=-999
LimitNOFILE=infinity
LimitNPROC=infinity
LimitCORE=infinity

[Install]
WantedBy=multi-user.target

2.5 检查 Docker 依赖的 socket 文件

# 创建 docker.socket 文件（若缺失）
sudo vi /etc/systemd/system/docker.socket

#重载并启动
sudo systemctl daemon-reload
sudo systemctl enable docker.socket
sudo systemctl start docker.socket

[Unit]
Description=Docker Socket for the API

[Socket]
ListenStream=/var/run/docker.sock
SocketMode=0660
SocketUser=root
SocketGroup=docker

[Install]
WantedBy=sockets.target

2.6 环境变量配置

# 永久生效（写入 ~/.bashrc 或 /etc/profile）
echo 'export PATH=$PATH:/usr/local/bin' >> ~/.bashrc
source ~/.bashrc

2.7 启动并测试

# 重载 systemd
sudo systemctl daemon-reload

# 启动 containerd
sudo systemctl start containerd
sudo systemctl enable containerd

# 启动 Docker
sudo systemctl start docker
sudo systemctl enable docker

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