一、背景描述

因为公司用到sftp结合nfs共享文件场景，sftp服务器挂载了许多其他服务器，在主备切换的时候，一台台挂上去不符合现实，所以写了下面的shell脚本。


二、思路

  1. 把所有写好的，可以直接拿来用的mount语句写在一个单独的文件，每次从这个文件读取一行，进行挂载，只要把这个文件保持好一定的格式规范，那么就没有问题。
  2. 挂载前做一定的条件判断，比如端口不通，不符合条件的不挂载了，以免浪费时间。
  3. 在判断端口的时候记录日志，在挂载的时候记录日志，运维不可缺少的就是日志。


三、脚本详细

#!/bin/bash
# Wirter: liangge
# Date： 2022.06.09
# Description: 批量挂载
#挂载文件路径，并判断(文件可以有多个，但要符合规范：挂载文件里只写mount语句)

dateday=`date "+%Y%m%d"`
logfile="/var/log/mount-${dateday}.log"
echo "BEGIN POSITION" >> $logfile

filelist="/root/mount_sftp_file.sh"
for file in $filelist
do
    if [[ ! -f $file ]];then
      echo "${file}文件不存在，直接退出脚本。"
      exit;
    fi
done

#判断包,nc命令属于nmap-ncat包
rpm -qa|grep nmap-ncat > /dev/null
if [[ "$?" != "0" ]]; then
  echo "nmap-ncat packet not install,please install first."
  exit;
fi

#提示，且记录日志
function PromLog()
{
  echo $1

  #这里时间是变动的，所以不能封装成变量。
  echo "$(date "+%Y%m%d %H:%M:%S") $1" >> $logfile
  continue
}

#一.Linux挂载的函数
function LinuxMount()
{
  #先判断目录，不通的打印出来；时间限制2s；
  local mutSentence=$1
  #如果最后是以斜杠结尾，把斜杠去掉
  if [[ $mutSentence == */ ]]; then mutSentence=`echo -n $mutSentence | sed 's/.$//'`; fi

  local mpoint=`echo -n $mutSentence | awk '{print $NF}'`
  if [[ ! -d $mpoint ]]; then
    PromLog "${mpoint} mount point not exist."
  fi

  #是否挂载过
  mount | grep $mpoint >> $logfile 2>&1
  if [[ $? -eq 0 ]]; then
    PromLog "$mpoint is already mounted, ignore."
  fi

  #showmount地址
  local ip=`echo -n $mutSentence|awk -F ":" '{print $1}'|awk -F " " '{print $2}'`    #输出ip地址(注:-n不能去掉，否则会执行两次，会失败)
  timeout -k 1 1 showmount -e $ip >> $logfile 2>&1           #2秒后如果进程还存在，就是要-k参数强制杀死。
  if [[ $? -ne 0 ]]; then
    PromLog "${ip} showmount failed."
  fi

  #开始挂载；若2秒后如果挂载失败，中止，打印出来.
  timeout -k 2 2 $mutSentence >> $logfile 2>&1
  local result=$?
  if [[ "$result" != 0 ]]; then
  PromLog "Exec failed: ${mutSentence}"
  fi

}

#二.windows挂载的函数
function WindowsMount()
{
  local mutSentence=$1
  #如果最后是以斜杠结尾，把斜杠去掉
  if [[ $mutSentence == */ ]]; then mutSentence=`echo -n $mutSentence | sed 's/.$//'`; fi

  #判断挂载点目录是否存在
  local mpoint=`echo -n $mutSentence | awk '{print $NF}'`    #NF最后一列
  if [[ ! -d $mpoint ]]; then
    PromLog "${mpoint} mount point not exist."
  fi

  #是否挂载过
  mount | grep $mpoint >> $logfile 2>&1
  if [[ $? -eq 0 ]]; then
    PromLog "$mpoint is already mounted, ignore."
  fi

  #判断端口连通性
  local ip=`echo -n $mutSentence | awk '{print $6}' | awk -F "/" '{print $3}'`       #输出ip地址(注：-n 不能去掉，否则会执行两次，会失败)
  nc -v -z -w 1 $ip 445 >> $logfile 2>&1                               #超时时间1秒
  if [[ ! $? -eq 0 ]]; then
    PromLog "$ip port probe failed"
  fi

  #开始挂载
  timeout -k 2 2 $mutSentence >> $logfile 2>&1
  local result=$?
  if [[ "$result" != 0 ]]; then
  PromLog "Exec failed: ${mutSentence}"
  fi
}

#三、先筛选linux、windows机器，然后进入相应的挂载函数
for file in $filelist
do
    #a,筛选出linux机器，然后执行linux挂载函数；read每次读取一行；行中的单引号替换掉，否则会报错，所以密码中不能包含单引号，单引号也不属于特殊字符
    cat $file | grep -v "^#" | grep :/ | sed "s/[';]//g" | while read r
    do
      #$r参数里面包含空格，一定要加上双引号
      LinuxMount "$r"
    done

    #b,筛选出windows机器，然后执行windows挂载函数；read每次读取一行；行中的单引号替换掉，否则会报错
    cat $file | grep // | grep -v "^#" | sed "s/[';]//g" | while read r
    do
      #$r参数里面包含空格，一定要加上双引号
       WindowsMount "$r"
    done
done

四、效果展示

[root@node3 ~]# cat mount_sftp_file.sh #写挂载语句的文件
mount 127.0.0.1:/tmp/a  /tmp/a1;
mount 127.0.0.2:/tmp/a  /tmp/a1;
mount 127.0.0.2:/tmp/a  /tmp/a1;
mount 127.0.0.2:/tmp/a  /tmp/a1

[root@node3 ~]# ./batch_mount.sh  #一行一行挂载
127.0.0.1 showmount failed.
127.0.0.2 showmount failed.
127.0.0.2 showmount failed.
127.0.0.2 showmount failed.
/home/sftp/custom/riuxintiansuan/121.32 mount point not exist.
10.36.120.61 port probe failed

[root@node3 ~]# tail /var/log/mount-20220610.log -n 30 #日志文件
20220610 07:30:05 /home/sftp/custom/riuxintiansuan/121.32 mount point not exist.
Ncat: Version 7.50 ( https://nmap.org/ncat )
Ncat: Connection timed out.
20220610 07:30:06 10.36.120.61 port probe failed
BEGIN
timeout: failed to run command ‘showmount’: No such file or directory
20220610 07:30:12 127.0.0.1 showmount failed.
timeout: failed to run command ‘showmount’: No such file or directory
20220610 07:30:12 127.0.0.2 showmount failed.
timeout: failed to run command ‘showmount’: No such file or directory
20220610 07:30:12 127.0.0.2 showmount failed.
timeout: failed to run command ‘showmount’: No such file or directory
20220610 07:30:12 127.0.0.2 showmount failed.
20220610 07:30:12 /home/sftp/custom/riuxintiansuan/121.32 mount point not exist.
Ncat: Version 7.50 ( https://nmap.org/ncat )
Ncat: Connection timed out.
20220610 07:30:13 10.36.120.61 port probe failed