docker安装方式

docker目前支持centos7及以后的版本，要求64位操作系统，内核版本至少为3.10

一、docker在线安装

1.1、安装docker所需的工具

• yum-utils 提供了 yum-config-manager,用于后续添加docker仓库源

• device-mapper-persistent-data和lvm2 是device mapper存储驱动程序需要。Device Mapper 是 Linux2.6 内核中支持逻辑卷管理的通用设备映射机制，它为实现用于存储资源管理的块设备驱动提供了一个高度模块化的内核架构。

# yum install yum-utils device-mapper-persistent-data lvm2 -y

1.2、添加docker稳定版本的yum软件安装源

# yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo

1.3、查询可安装docker软件版本

# yum list docker-ce --showduplicates

1.4、安装最新版本的docker软件

# yum install docker-ce -y

1.5、查看docker安装版本

# docker version

1.6、更改国内的docker镜像下载源

# vim /etc/docker/daemon.json
{
  "registry-mirrors": ["https://yuiile7n.mirror.aliyuncs.com"]
}

二、docker离线安装

2.1、rpm包安装方式，下载地址：

https://download.docker.com/linux/centos/7/x86_64/stable/Packages/

2.2、离线二进制安装包，下载地址：

https://download.docker.com/linux/static/stable/x86_64/

2.3、安装过程

# tar -zxvf docker-20.10.14.tgz  
# cp docker/* /usr/bin/  
# cd /etc/systemd/system/  
# vim docker.service  
[Unit]  
Description=Docker Application Container Engine  
Documentation=[https://docs.docker.com](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 --selinux-enabled=false --insecure-registry=192.168.94.110  
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  

--insecure-registry=192.168.94.110 改为自己服务器的IP地址  
  
# chmod 777 docker.service  
# systemctl daemon-reload  
# systemctl start docker