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推荐用阿里云的容器服务
环境检测更新
环境检测
Docker 要求 CentOS 系统的内核版本高于 3.10
uname -r
#输出
3.10.0-862.14.4.el7.x86_64
更新
yum -y update
创建用户及用户组
useradd docker
设置用户密码
passwd docker
随后要输入2次密码
安装docker
执行自动安装命令
curl -fsSL https://get.docker.com/ | sh
执行
usermod -aG docker docker
启动
设置启动和开机启动
systemctl start docker
systemctl enable docker
切换到docker用户下
方式一
su docker
方式二
退出root用户,使用docker用户登录
下载和运行hello-world镜像容器
要在 docker 用户下操作,不能在 root 用户下操作
下载镜像
docker pull hello-world
运行容器
docker run hello-world
输出
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/