1. 安装docker。
转自:https://blog.csdn.net/yucaifu1989/article/details/103111317###
centos8 安装 docker
centos 安装docker
官方参考地址:https://docs.docker.com/install/linux/docker-ce/centos/
里面包含包下载地址: https://download.docker.com/linux/centos/7/x86_64/stable/Packages/
安装依赖
yum install -y yum-utils device-mapper-persistent-data lvm2
yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
yum install docker-ce docker-ce-cli containerd.io
如果报错:Problem: package docker-ce-3:19.03.4-3.el7.x86_64 requires containerd.io >= 1.2.2-3 那就先装新版的 containerd.io
安装新版本containerd.io
dnf install https://download.docker.com/linux/centos/7/x86_64/stable/Packages/containerd.io-1.2.6-3.3.el7.x86_64.rpm
再装剩下两个
yum install docker-ce docker-ce-cli
启动docker
systemctl start docker
查看版本
docker --version
开机自启
systemctl enable docker
2. 将非root用户添加到docker用户组。
转自:https://blog.csdn.net/dingqingsong/article/details/76377288
通常我们使用Docker的时候都是使用的root,官方说法如下:
The docker daemon binds to a Unix socket instead of a TCP port. By default that Unix socket is owned by the user root and other users can access it with sudo. For this reason, docker daemon always runs as the root user.
To avoid having to use sudo when you use the docker command, create a Unix group called docker and add users to it. When the docker daemon starts, it makes the ownership of the Unix socket read/writable by the docker group.
下面是使用非root用户操作的步骤
创建docker组
sudo groupadd docker
将当前用户加入docker组
sudo gpasswd -a ${USER} docker
重新启动docker服务(下面是CentOS7的命令)
sudo systemctl restart docker
当前用户退出系统重新登陆
运行docker命令
docker ps
3. 从远程仓库拉取镜像,例如拉取openjdk的镜像:
docker pull openjdk
等待拉取成功之后就可以直接通过命令查看docker本地镜像了:
docker images