【Docker笔记】Docker安装及配置

---

CentOS安装Docker

在线安装： 官方文档
离线安装： 官方文档

安装步骤

下载指定版本二进制离线包：https://download.docker.com/linux/static/stable/

# 例
wget https://download.docker.com/linux/static/stable/x86_64/docker-20.10.19.tgz

解压二进制压缩包

tar -zxvf docker-20.10.19.tgz

配置Docker用户

# 创建组
groupadd docker
# 添加Docker用户
useradd -g docker docker
# 设置密码
passwd docke
# 添加sudo权限：docker  ALL=(ALL)       ALL，增加一行
sudo visudo

将二进制文件移动到可执行文件目录

sudo cp docker/* /usr/bin/

注册systemctl自启

通过yum、apt-get安装，在启动Docker后，会自动注册service，无需手动配置

# vim /etc/systemd/system/docker.service
# 创建docker.service文件，输入以下内容
[Unit]
Description=Docker Application Container Engine
Documentation=https://docs.docker.com
After=network-online.target firewalld.service
Wants=network-online.target

[Service]
Type=notify
# the default is not to use systemd for cgroups because the delegate issues still
# exists and systemd currently does not support the cgroup feature set required
# for containers run by docker
ExecStart=/usr/bin/dockerd
ExecReload=/bin/kill -s HUP $MAINPID
# Having non-zero Limit*s causes performance problems due to accounting overhead
# in the kernel. We recommend using cgroups to do container-local accounting.
LimitNOFILE=infinity
LimitNPROC=infinity
LimitCORE=infinity
# Uncomment TasksMax if your systemd version supports it.
# Only systemd 226 and above support this version.
#TasksMax=infinity
TimeoutStartSec=0
# set delegate yes so that systemd does not reset the cgroups of docker containers
Delegate=yes
# kill only the docker process, not all processes in the cgroup
KillMode=process
# restart the docker process if it exits prematurely
Restart=on-failure
StartLimitBurst=3
StartLimitInterval=60s

[Install]
WantedBy=multi-user.target

增加执行权限

chmod +x /etc/systemd/system/docker.service

加载配置

systemctl daemon-reload

启动Docker

systemctl start docker
# 查看状态
systemctl status docker

配置开机自启

systemctl enable docker.service
systemctl is-enabled docker.service

docker-compose安装

下载可执行文件：

# 更多版本参见：https://github.com/docker/compose/releases
wget https://github.com/docker/compose/releases/download/v2.24.2/docker-compose-linux-x86_64

移动到可执行文件目录

cp docker-compose-linux-x86_64 /usr/local/bin/docker-compose

添加可执行权限

chmod +x /usr/local/bin/docker-compose

验证是否可用

docker-compose -v

Windows安装Docker

安装步骤

1. 安装Docker前确保 Linux 子系统已启用（控制面板 > 程序和功能）
   
2. 下载Docker Desktop安装文件，历史版本下载地址：点击跳转
3. 双击 Docker Desktop Install.exe，过程中默认点下一步即可。
4. 安装完成后，点击桌面图标，进入Docker，左下方显示绿色则表示安装成功。
   

常见问题解决

WSL2 installation is incomplete

安装wsl_update后重启电脑