简单粗暴的八步安装docker

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#查看内核 内核是3.10及以上
uname -r

[root@localhost mengming]# uname -r
3.10.0-1062.el7.x86_64

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# 系统版本centos7及以上
cat /etc/os-release 
[root@localhost mengming]# cat /etc/os-release 
NAME="CentOS Linux"
VERSION="7 (Core)"
ID="centos"
ID_LIKE="rhel fedora"
VERSION_ID="7"
PRETTY_NAME="CentOS Linux 7 (Core)"
ANSI_COLOR="0;31"
CPE_NAME="cpe:/o:centos:centos:7"
HOME_URL="https://www.centos.org/"
BUG_REPORT_URL="https://bugs.centos.org/"

CENTOS_MANTISBT_PROJECT="CentOS-7"
CENTOS_MANTISBT_PROJECT_VERSION="7"
REDHAT_SUPPORT_PRODUCT="centos"
REDHAT_SUPPORT_PRODUCT_VERSION="7"

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yum remove docker 
                  docker-client 
                  docker-client-latest 
                  docker-common 
                  docker-latest 
                  docker-latest-logrotate 
                  docker-logrotate 
                  docker-engine

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yum install -y yum-utils

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yum-config-manager 
    --add-repo 
    https://download.docker.com/linux/centos/docker-ce.repo #默认是国外的

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yum-config-manager 
     --add-repo 
     http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

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yum makecache fast

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yum install docker-ce docker-ce-cli containerd.io

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systemctl start docker

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docker version

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docker run hello-world