设计思路：

1、创建磁盘分区变量集合

 devName=("vdb" "vdc" "vdd" "vde")

2、创建for循环，磁盘分区数量 /dev/vdb0~3，用于在for循环中if判断磁盘分区是否已经存在

if 判断条件 [[ -b "目录名称"]]

if [[ -b "/dev/${devName[$a]}1" ]];then

3、如磁盘分区不存在就创建磁盘分区 PV、VG、LV

 

在root用户下执行

cat diskcfg.sh

devName=("vdb" "vdc" "vdd" "vde")
for a in {0..3}
do
  echo "/dev/${devName[$a]}"
  # 判断磁盘是否存在
  ret0=`fdisk -l |grep /dev/${devName[$a]}`
  if [ "$ret0" == "" ];then
        echo "/dev/${devName[$a]} is not exit."
        continue;
  fi
    
  echo "$a"
  echo "/dev/${devName[$a]}1"
  if [[ -b "/dev/${devName[$a]}1" ]];then
     echo "这块磁盘已经分区，退出，请管理员检查"
  else
     echo "开始进行分区操作"
     echo "parted /dev/${devName[$a]} print"
        parted /dev/${devName[$a]} print
     echo "parted /dev/${devName[$a]} "mklabel gpt""
        parted /dev/${devName[$a]} "mklabel gpt ignore yes"
     echo "parted /dev/${devName[$a]} "mkpart primary xfs 1 -1""
        parted /dev/${devName[$a]} "mkpart primary xfs 1 -1 ignore"
     echo "parted /dev/${devName[$a]} "quit""
        parted /dev/${devName[$a]} "quit"
     echo "mkfs.xfs /dev/${devName[$a]}1"
       mkfs.xfs -f /dev/${devName[$a]}1
     echo "pvcreate /dev/${devName[$a]}1"
        pvcreate /dev/${devName[$a]}1 -y
     echo "mkdir /zol"
        if [ ! -d /zol ];then
            mkdir -p /zol
        fi

     echo "add /dev/${devName[$a]}1 to vgzol"
        vg=`vgs | awk '{if(NR>1){print $1}}' | grep "vgzol"`
        if [ "$vg" != "" ];then
            vgextend vgzol /dev/${devName[$a]}1 -f -y
        else
            vgcreate vgzol /dev/${devName[$a]}1 -f
        fi

     echo "add /dev/${devName[$a]}1 to lvzol"
        lv=`lvs | awk '{if(NR>1){print $1}}' | grep "lvzol"`
        if [ "$lv" != "" ];then
            lvresize -l +100%FREE -r /dev/vgzol/lvzol -f
        else
            lvcreate -n lvzol -L +2048G /dev/vgzol -y
            mkfs.xfs /dev/vgzol/lvzol
            mount /dev/vgzol/lvzol /zol
            echo "/dev/vgzol/lvzol /zol xfs defaults 0 0" >> /etc/fstab
        fi

     echo "df -h"
        df -h
     echo "----------------------------------------------------------------------------------"
  fi   
done