Shell版tomcat管理器

由于项目的原因，需要帮产品对很多tomcat应用频繁的重启。一段时间后我决定写一个Shell脚本来简化这个繁琐的工作，并带有交互界面可以让策划和产品人员使用。脚本完成后已使用了几个月，比较稳定。回想当时入门Shell时，参考了不少资料，没有发现一个大小适中的，适合自己学习的实用资料。这里贴出脚本，主要是方便新手学习。本例中用到不少我知道的技巧，大小也适中，比较适合入门。但毕竟平时写shell不多，水平有限，熟手若发现什么问题，欢迎指正、讨论。

#!/bin/bash
#server manager

# version 1.0
# Author:jaden

#====Read Me=====
# This is mainly designed for the non-programmers to manager servers
# with basic operation. More function would be added in the future.
# It also could provide convinience for the developers.
# Wish you enjoy it.

#===Rely On=====
# tongbu rely on tongbu.sh in every tomcat bin directory

#===technique====
# Process shutdown and startup once executed, they will not be sighuped
# by closing the terminal. However, tailf commond will sighuped.


#Settings start
path="/home/app"
#Settings end

#viarables
processarr=""
selectserver=""


function shutdown {
  # here need the server name
  servername=$1
  cd "$path/$servername"

  # check if the server is running
  pid=`processpid $servername`
  if [ -z "$pid" ]
  then
    echo -e "\t$servername is already down"
    return
  else
    echo -e "\t$servername is running"
  fi

  # start OR restart a server
  echo -e "\t$servername is shuting down"
  nohup sh bin/shutdown.sh > /dev/null 2>&1 &
  echo -en "\tPlease wait in 20 seconds"
  for (( i=1 ; i<=20 ; i++))  
  do
    sleep 1s    
    echo -n "." 
    pid=`processpid $servername`
    if [ -z "$pid" ]
    then
      echo -e "\n\t$servername is already down"
      break
    fi
  done
  echo
  pid=`processpid $servername`
  if [ -z "$pid" ]
  then
    echo -e "\t\e[1;32m[shutdown] $servername shutdown successfully\e[0m"
  else
    echo -e "\t$servername is going to be killed"
    killpid $pid
    echo -e "\t\e[1;32m[shutdown] $servername was killed\e[0m"
  fi
}

function startup {
  # here need the server name
  servername=$1
  cd "$path/$servername"
  
  # shutdown firstly
  shutdown $servername
  
  # then start
  echo -e "\t\e[1;32m[startup] $servername is starting...,  \
  it will take few minutes\e[0m"
  nohup sh bin/startup.sh > /dev/null 2>&1 &
}

function startwatch {
  # here need the server name
  startup $1
  sleep 2s
  watch $servername
}

function watch {
  # here need the server name
  servername=$1
  cd "$path/$servername"
  tailf logs/catalina.out
}

#rely on tongbu.sh
function tongbu {
  servername=$1
  cd "$path/$servername"
  #shutdown firstly
  shutdown $servername
  #tongbu secondly
  result=`sh bin/tongbu.sh | grep 'rsync success'`
  if [ -n "$result" ]
  then
    echo -e "\t\e[1;32m[tongbu] tongbu success!\e[0m"
    sleep 1s
    #start&watch thirdly
    startwatch $servername
  else
    echo 
    echo -e "\ttongbu failed!"
    sleep 2s
  fi
}


function processpid {
  # here need the server name
  ps -ef | sed -n "/$1\s/p" | grep $path | gawk '{print $2}'
}

#processarr
function serverarr {
  cd $path
  processarr=($(ls -l | grep tomcat | sed -n '/\.gz$/!p' |  \
  sed -n '/\.bz2$/!p' | gawk '{print $9}'))
} 

function printprocesslist {
  echo -e "\tThere is/are ${#processarr[@]} server(s)"
  printf "\t%-8s %-25s %-10s %-5s\n" No. Server Status Pid
    num=1
    for process in ${processarr[*]}
    do
      pid=`processpid $process`
      if [ -n "$pid" ] #how to take the contrary
      then
        status="running"
      else
        status="idle"
      fi
      printf "\t%-8s %-25s %-10s %-5s\n" $num $process $status $pid
      num=$[ $num + 1 ]
    done
}

#Only positive number could pass
function checkfunction {
  if [ -z $1 ]
  then
    echo
    echo -e "\tLong time on operation. Exit.."
    exit
  fi
  # if it's not a number
  if ! expr $1 + 10 &>/dev/null
  then
    echo -e "\tWrong type in. Exit.."
    exit
  fi
  if [ $1 -lt 0 ]
  then
    echo -e "\tWrong type in. Exit.."
    exit
  fi
  if [ $1 -eq 0 ]
  then
    echo -e "\tExit.."
    exit
  fi
}

#selectprocess
function selectprocess {
  echo
  echo -e "\tPlease only type Number (0 to quit)"
  echo -en "\tSelect a server:"
  read -t 30 command
  checkfunction $command
  if [ $command -gt ${#processarr[@]} ]
  then
    echo -e "\tWrong selection!"
    exit
  fi  
  selectserver="${processarr[ $[$command-1] ]}"
  echo
  echo -en "\tthe select server is  \e[1;31m$path/$selectserver\t\e[0m"
  echo -en " \e[1;32mbe carefull\e[0m"
  for ((i=1;i<3;i++))
    do
      sleep 1s
      echo -en "\e[1;32m.\e[0m"
    done
  echo
}

function killpid {
  kill -9 $1
}

function menu {
  command=""
  selectserver=""
  clear
  echo -e "\t\tWelcome to the Server Manager System"
  echo
  echo -e "\tYou can press Ctrl + C to Quit the system at any time"
  echo -e "\tIf you have any question, please consult a server programmer"
  echo
  echo -e "\tSystem Time:\t`date`"
  echo -e "\tWorking path:\t$path"
  echo
  serverarr
  printprocesslist
  selectprocess
  echo
  echo -e "\t0. quit\t\t\tto quit the manager system"
  echo -e "\t1. startup\t\tto start OR restart a server"
  echo -e "\t2. shutdown\t\tto shutdown a server"
  echo -e "\t3. start&watch\t\tto start OR restart a server and  \
  then watch the process"
  echo -e "\t4. reselect\t\tto reselect a server"
  echo -e "\t5. watch\t\tto watch the processing"
  echo -e "\t9. tongbu\t\tto shutdown, tongbu and then start a server \
  \e[1;31m(Only for developers!)\e[0m"
  echo
  echo -en "\tPlease type in the command:"
  command=""
  read -t 30 command
  checkfunction $command
}

function show {
while [ 1 ]
do
  menu
  case $command in
  1)
  #startup
  startup $selectserver
  sleep 6s
  ;;
  2)
  #shutdown
  shutdown $selectserver
  sleep 2s
  ;;
  3)
  #startwatch
  startwatch $selectserver
  ;;
  4)
  #reselect
  ;;
  5)
  watch $selectserver
  ;;
  9)
  tongbu $selectserver
  ;;
  0)
  echo
  exit
  ;;
  *)
  echo -e "\tPlease type the right commond"
  sleep 2s
  ;;
  esac
done
}

show