Docker安装 | 易学教程

Docker 是一个开源的应用容器引擎，基于 Go 语言并遵从Apache2.0协议开源。

Docker 可以让开发者打包他们的应用以及依赖包到一个轻量级、可移植的容器中，然后发布到任何流行的 Linux 机器上，也可以实现虚拟化。

容器是完全使用沙箱机制，相互之间不会有任何接口（类似 iPhone 的 app）,更重要的是容器性能开销极低。

docker源码安装

一、基础环境
1、操作系统：CentOS 7.6
2、Docker版本：https://download.docker.com/linux/static/stable/x86_64/
3、官方参考文档：https://docs.docker.com/install/linux/docker-ce/binaries/#install-static-binaries

二、Docker安装

1、下载

    wget https://download.docker.com/linux/static/stable/x86_64/docker-18.09.4-ce.tgz
                          

2、解压

    tar -xvf docker-18.09.4-ce.tgz
                          

3、将解压出来的docker文件内容移动到 /usr/bin/ 目录下

cp docker/* /usr/bin/

4、将docker注册为service

    vim /etc/systemd/system/docker.service
  

    [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
  

5、启动

    chmod +x /etc/systemd/system/docker.service #添加文件权限并启动docker
 
systemctl daemon-reload                 #重新加载配置文件
systemctl start docker          #启动Docker
systemctl enable docker.service         #设置开机自启
  

6、验证

    systemctl status docker         #查看Docker状态
docker -v           #查看Docker版本
  

docker yum安装