docker系统初始化脚本

#!/bin/bash
#Auther jia.yu
#version v1.0
redEcho(){
        echo -en "\033[31;31m"
        echo -en  "$1\n"
        echo -en "\033[m"
}

function stopFirewall()
{
#stop firewall
    FIREWALL_state=`systemctl status firewalld | awk 'NR==3 {print $2}'`
    if [ $FIREWALL_state = 'active' ];then
        systemctl stop firewalld
        systemctl disable firewalld
    else
        redEcho "firewall is already stopped,nothing to do"
    fi
}

function disableSelinux()
{
#disable selinux
    SELINUX_state=`getenforce`
    if [ $SELINUX_state = 'Enforcing' ];then
        sed -i "s#SELINUX=enforcing#SELINUX=disabled#g" /etc/selinux/config
        read -p "Reboot system now?[y/n]" input
        case $input in 
            [yY]*)
                      shutdown -Fr now
                      ;;
            [nN]*)
                      exit
                      ;;
            *)
                      echo "please enter y or n."
                      exit
                      ;;
        esac
    else
        redEcho "selinux is already disabled,nothing to do."
    fi
}

function installTools()
{
#yum install tools
    yum -y install wget vim net-tools yum-utils lrzsz git ntpdate
}

function ntpUpdate()
{
#ntpdate
    echo "*/10 * * * * root  /usr/sbin/ntpdate time.windows.com >/dev/null 2&>1" >> /etc/crontab
    /usr/sbin/ntpdate time.windows.com
}


function vimSyntax()
{
#vim syntax
    echo "alias vi='vim'">> /etc/bashrc
    echo "export LS_OPTIONS='--color=auto'">> /etc/bashrc
    source /etc/bashrc
    echo "TERM=xterm-color">> /etc/profile
    source /etc/profile
}

function dataDir()
{
#node节点需要配置docker存储路径使用，master节点不用
#fdisk /dev/sdb; docker root dir=/data/docker and /data/docker mount /dev/sdb1
fdisk /dev/sdb<<EOF
n
p
1


w
EOF

mkfs.xfs /dev/sdb1
sleep 5

DISK_UUID=`ls -l /dev/disk/by-uuid/* | grep sdb1 | awk '{print $9}' | awk -F "/" '{print $5}'`
if [ -d /data ];then
    echo "the data floder exists. nothing to do."
    exit
else
    mkdir /data
    echo "UUID=$DISK_UUID /data xfs rw,pquota 0 0">>/etc/fstab
    mount -a
fi
}

function dockerInstall()
{
#node install docker
    sudo yum-config-manager \
        --add-repo \
        https://download.docker.com/linux/centos/docker-ce.repo

    sudo yum -y install docker-ce docker-ce-cli containerd.io
    systemctl start docker
    systemctl enable docker
}

function dockerRegistry()
{
sudo mkdir -p /etc/docker
cat >> /etc/docker/daemon.json <<EOF
{
  "registry-mirrors": ["https://w97h49tv.mirror.aliyuncs.com"]
}
EOF
}

function chgDockerDir()
{
#sed -i "s#ExecStart=/usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock#ExecStart=/usr/bin/dockerd -H 0.0.0.0:2375 -H fd:// --containerd=/run/containerd/containerd.sock#g" \
#/usr/lib/systemd/system/docker.service
#change docker basedir
sed -i "s#ExecStart=/usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock#ExecStart=/usr/bin/dockerd --data-root=/data/docker $DOCKER_NETWORK_OPTIONS#g" /usr/lib/systemd/system/docker.service

#reload docker
systemctl daemon-reload
systemctl restart docker
}

function configureKernel()
{
#sysctl
cat >>/etc/sysctl.conf<<EOF
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
net.ipv4.ip_forward=1
vm.swappiness=0
fs.file-max=52706963
fs.nr_open=52706963
EOF
sysctl -p
}

function chgHosts()
{
#hosts
cat >>/etc/hosts<<EOF
172.16.90.131 master01
172.16.90.132 master02
172.16.90.133 master03
172.16.90.134 node01
172.16.90.135 node02
EOF
}

function menu()
{
cat <<eof
|======================================================================|
|                                MENU                                                                                                                          |
|======================================================================|
|   1.关闭系统防火墙(stopfirewall)                                                                                                               |
|   2.禁用Selinux(disableSelinux)                                                                                                                |
|   3.安装常用工具(yum install wget|vim|net-tools|lrzsz|git|ntpdate)                                                     |         
|   4.格式化数据盘并挂载/data目录                                                                                                             |
|   5.安装docker(安装并修改docker base-dir,镜像加速)                                                                            |        
|   6.修改内核运行参数(chgKernelPara)                                                                                                      |
|   7.修改hosts文件(chgHostsFile)                                                                                                              |
|   8.退出exit                                                                                                                                                 | 
|======================================================================|
eof
}

function usage()
{
    read -p "please input your choice: " choice
    case $choice in
        1)
            stopFirewall
            ;;
        2)
            disableSelinux
            ;;
        3)
            installTools
            ntpUpdate
            vimSyntax
            ;;
        4)
            dataDir
            ;;
        5)
            dockerInstall
            dockerRegistry
            chgDockerDir
            ;;
        6)
            configureKernel
            ;;
        7)
            chgHosts
            ;;
        8)
            exit 0
            ;;
        *)
            echo "please input number etc [1|2|3|4|5|6|7|8]."
            ;;
    esac
}

function  main()
{
    while true
    do
        menu
        usage
    done
}


main