docker linux环境下的安装步骤过程
安装dockerLinux 内核:官方建议 3.10 以上
### 1.查看当前的内核版本
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### 2.检查是否安装过
`yum remove dockerdocker-common docker-selinux docker-engine`
检查确认是否有残留的包(之前安装过的包)
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### 详细步骤
1.安装需要的软件包, yum-util 提供yum-config-manager功能,另两个是devicemapper驱动依赖
`yum install -y yum-utils device-mapper-persistent-data lvm2`
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2.设置 yum 源
设置一个yum源,下面两个都可用,中央仓库国外,通常较慢,可以使用阿里的
`yum-config-manager --add-repo http://download.docker.com/linux/centos/docker-ce.repo` (中央仓库)
`yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo` ( 阿里仓库)
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3.选择docker版本并安装
(1)查看可用版本有哪些
`yum list docker-ce --showduplicates | sort -r`
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可以指定版本安装
版本号中可以忽略 : 前面的和 .el7,如 docker-ce-18.09.1 也就是 yum install docker-ce-版本号
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如果想添加到开机启动
`systemctl enable docker`
启动 docker 服务
`systemctl start docker`
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查看版本
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基本检查
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