在线安装docker 脚本

#!/bin/bash

env(){

echo -e "\e[1;33m perparing env!!!\e[0m"
        yum install -y yum-utils
        yum-config-manager \
    --add-repo \
    https://download.docker.com/linux/centos/docker-ce.repo
if [ -f /etc/yum.repos.d/docker-ce.repo ];then
echo -e "\e[1;32m yum源已经存在\e[0m"
else
echo -e "\e[1;31m yum源不存在\e[0m"
fi
}

install_docker_engine(){
echo -e "\e[3;32m----------------------------------------------------------------------------------------------------\e[0m"
echo -e "\e[2;33m 以下是docker版本列表:\e[0m"
yum list docker-ce --showduplicates | sort -r | grep el7
        read -p "请在上面的列表中选择并输入您要安装的docker版本(example:3:20.10.11-3.el7;输入:20.10.11):" version
yum install -y docker-ce-$version docker-ce-cli-$version containerd.io docker-compose-plugin
if [ $? -eq 0 ];then
echo -e "\e[1,32m docker-$version 版本安装成功，正在启动中......\e[0m"
systemctl start docker
if [ $? -eq 0 ];then
sleep 4
systemctl status docker
echo -e "\e[1,32m docker启动成功!\e[0m"
else
echo -e "\e[1,31m docker启动失败!\e[0m"
fi
else
echo -e "\e[1,31m docker安装失败，请检查日志...\e[0m"
fi
}

remove_old_version (){

echo -e "\e[1;33m remove docker old version!\e[0m"
yum remove docker \
                  docker-client \
                  docker-client-latest \
                  docker-common \
                  docker-latest \
                  docker-latest-logrotate \
                  docker-logrotate \
                  docker-engine 

if [ $? -eq 0 ];then
    echo -e "\e[1;32m remove docker old version successful!!!\e[0m"
    sleep 5
else
    echo -e "\e[1;31m please check \e[0m"
fi
}

 image_speed_up () {
echo -e "\033[1;33m正在添加镜像加速地址......\e[0m"
cat >> /etc/docker/daemon.json << EOF
{
  "registry-mirrors": ["https://bm19jwri.mirror.aliyuncs.com"]
}
EOF
echo -e "\033[1;32m添加成功！！！\e[0m"
        systemctl daemon-reload && systemctl restart docker
}

remove_old_version
env

install_docker_engine
image_speed_up