写一个shell 快速启动停止你的微服务吧

时间：2023-03-08 20:14:12

　　在这个微服务盛行的时代，docker获得了巨大的成功，因为我们需要在一台服务器装上N个服务。

　　本文不是想讨论如何使用docker，而是，在一台服务器安装了多个服务后，怎样启动方便的启动服务呢？

一、在tomcat的时代中，直接使用tomcat的启动停止命令，轻松搞定，（tomcat的启动脚本很有水平，感兴趣的点开'+'号查看源码学习下吧）

#!/bin/sh

# chkconfig:

# description:tomcat service

JAVA_OPTS="$JAVA_OPTS -server -XX:PermSize=128M -XX:MaxPermSize=512m"

CATALINA_PID=/opt/tomcat7/pid.log

CATALINA_HOME=/opt/tomcat7

# OS specific support.  $var _must_ be set to either true or false.

cygwin=false

darwin=false

os400=false

case "`uname`" in

CYGWIN*) cygwin=true;;

Darwin*) darwin=true;;

OS400*) os400=true;;

esac

# resolve links - $ may be a softlink

PRG="$0"

while [ -h "$PRG" ]; do

  ls=`ls -ld "$PRG"`

  link=`expr "$ls" : '.*-> \(.*\)$'`

  if expr "$link" : '/.*' > /dev/null; then

    PRG="$link"

  else

    PRG=`dirname "$PRG"`/"$link"

  fi

done

# Get standard environment variables

PRGDIR=`dirname "$PRG"`

# Only set CATALINA_HOME if not already set

[ -z "$CATALINA_HOME" ] && CATALINA_HOME=`cd "$PRGDIR/.." >/dev/null; pwd`

# Copy CATALINA_BASE from CATALINA_HOME if not already set

[ -z "$CATALINA_BASE" ] && CATALINA_BASE="$CATALINA_HOME"

# Ensure that any user defined CLASSPATH variables are not used on startup,

# but allow them to be specified in setenv.sh, in rare case when it is needed.

CLASSPATH=

if [ -r "$CATALINA_BASE/bin/setenv.sh" ]; then

  . "$CATALINA_BASE/bin/setenv.sh"

elif [ -r "$CATALINA_HOME/bin/setenv.sh" ]; then

  . "$CATALINA_HOME/bin/setenv.sh"

fi

# For Cygwin, ensure paths are in UNIX format before anything is touched

if $cygwin; then

  [ -n "$JAVA_HOME" ] && JAVA_HOME=`cygpath --unix "$JAVA_HOME"`

  [ -n "$JRE_HOME" ] && JRE_HOME=`cygpath --unix "$JRE_HOME"`

  [ -n "$CATALINA_HOME" ] && CATALINA_HOME=`cygpath --unix "$CATALINA_HOME"`

  [ -n "$CATALINA_BASE" ] && CATALINA_BASE=`cygpath --unix "$CATALINA_BASE"`

  [ -n "$CLASSPATH" ] && CLASSPATH=`cygpath --path --unix "$CLASSPATH"`

fi

# For OS400

if $os400; then

  # Set job priority to standard for interactive (interactive - ) by using

  # the interactive priority - , the helper threads that respond to requests

  # will be running at the same priority as interactive jobs.

  COMMAND='chgjob job('$JOBNAME') runpty(6)'

  system $COMMAND

  # Enable multi threading

  export QIBM_MULTI_THREADED=Y

fi

# Get standard Java environment variables

if $os400; then

  # -r will Only work on the os400 if the files are:

  # . owned by the user

  # . owned by the PRIMARY group of the user

  # this will not work if the user belongs in secondary groups

  . "$CATALINA_HOME"/bin/setclasspath.sh

else

  if [ -r "$CATALINA_HOME"/bin/setclasspath.sh ]; then

    . "$CATALINA_HOME"/bin/setclasspath.sh

  else

    echo "Cannot find $CATALINA_HOME/bin/setclasspath.sh"

    echo "This file is needed to run this program"

    exit

  fi

fi

# Add on extra jar files to CLASSPATH

if [ ! -z "$CLASSPATH" ] ; then

  CLASSPATH="$CLASSPATH":

fi

CLASSPATH="$CLASSPATH""$CATALINA_HOME"/bin/bootstrap.jar

if [ -z "$CATALINA_OUT" ] ; then

  CATALINA_OUT="$CATALINA_BASE"/logs/catalina.out

fi

if [ -z "$CATALINA_TMPDIR" ] ; then

  # Define the java.io.tmpdir to use for Catalina

  CATALINA_TMPDIR="$CATALINA_BASE"/temp

fi

# Add tomcat-juli.jar to classpath

# tomcat-juli.jar can be over-ridden per instance

if [ -r "$CATALINA_BASE/bin/tomcat-juli.jar" ] ; then

  CLASSPATH=$CLASSPATH:$CATALINA_BASE/bin/tomcat-juli.jar

else

  CLASSPATH=$CLASSPATH:$CATALINA_HOME/bin/tomcat-juli.jar

fi

# Bugzilla : When no TTY is available, don't output to console

have_tty=

if [ "`tty`" != "not a tty" ]; then

    have_tty=

fi

# For Cygwin, switch paths to Windows format before running java

if $cygwin; then

  JAVA_HOME=`cygpath --absolute --windows "$JAVA_HOME"`

  JRE_HOME=`cygpath --absolute --windows "$JRE_HOME"`

  CATALINA_HOME=`cygpath --absolute --windows "$CATALINA_HOME"`

  CATALINA_BASE=`cygpath --absolute --windows "$CATALINA_BASE"`

  CATALINA_TMPDIR=`cygpath --absolute --windows "$CATALINA_TMPDIR"`

  CLASSPATH=`cygpath --path --windows "$CLASSPATH"`

  JAVA_ENDORSED_DIRS=`cygpath --path --windows "$JAVA_ENDORSED_DIRS"`

fi

# Set juli LogManager config file if it is present and an override has not been issued

if [ -z "$LOGGING_CONFIG" ]; then

  if [ -r "$CATALINA_BASE"/conf/logging.properties ]; then

    LOGGING_CONFIG="-Djava.util.logging.config.file=$CATALINA_BASE/conf/logging.properties"

  else

    # Bugzilla

    LOGGING_CONFIG="-Dnop"

  fi

fi

if [ -z "$LOGGING_MANAGER" ]; then

  LOGGING_MANAGER="-Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager"

fi

# Uncomment the following line to make the umask available when using the

# org.apache.catalina.security.SecurityListener

#JAVA_OPTS="$JAVA_OPTS -Dorg.apache.catalina.security.SecurityListener.UMASK=`umask`"

# ----- Execute The Requested Command -----------------------------------------

# Bugzilla : only output this if we have a TTY

if [ $have_tty -eq  ]; then

  echo "Using CATALINA_BASE:   $CATALINA_BASE"

  echo "Using CATALINA_HOME:   $CATALINA_HOME"

  echo "Using CATALINA_TMPDIR: $CATALINA_TMPDIR"

  if [ "$1" = "debug" ] ; then

    echo "Using JAVA_HOME:       $JAVA_HOME"

  else

    echo "Using JRE_HOME:        $JRE_HOME"

  fi

  echo "Using CLASSPATH:       $CLASSPATH"

  if [ ! -z "$CATALINA_PID" ]; then

    echo "Using CATALINA_PID:    $CATALINA_PID"

  fi

fi

if [ "$1" = "jpda" ] ; then

  if [ -z "$JPDA_TRANSPORT" ]; then

    JPDA_TRANSPORT="dt_socket"

  fi

  if [ -z "$JPDA_ADDRESS" ]; then

    JPDA_ADDRESS=""

  fi

  if [ -z "$JPDA_SUSPEND" ]; then

    JPDA_SUSPEND="n"

  fi

  if [ -z "$JPDA_OPTS" ]; then

    JPDA_OPTS="-agentlib:jdwp=transport=$JPDA_TRANSPORT,address=$JPDA_ADDRESS,server=y,suspend=$JPDA_SUSPEND"

  fi

  CATALINA_OPTS="$CATALINA_OPTS $JPDA_OPTS"

  shift

fi

if [ "$1" = "debug" ] ; then

  if $os400; then

    echo "Debug command not available on OS400"

    exit

  else

    shift

    if [ "$1" = "-security" ] ; then

      if [ $have_tty -eq  ]; then

        echo "Using Security Manager"

      fi

      shift

      exec "$_RUNJDB" "$LOGGING_CONFIG" $LOGGING_MANAGER $JAVA_OPTS $CATALINA_OPTS \

        -Djava.endorsed.dirs="$JAVA_ENDORSED_DIRS" -classpath "$CLASSPATH" \

        -sourcepath "$CATALINA_HOME"/../../java \

        -Djava.security.manager \

        -Djava.security.policy=="$CATALINA_BASE"/conf/catalina.policy \

        -Dcatalina.base="$CATALINA_BASE" \

        -Dcatalina.home="$CATALINA_HOME" \

        -Djava.io.tmpdir="$CATALINA_TMPDIR" \

        org.apache.catalina.startup.Bootstrap "$@" start

    else

      exec "$_RUNJDB" "$LOGGING_CONFIG" $LOGGING_MANAGER $JAVA_OPTS $CATALINA_OPTS \

        -Djava.endorsed.dirs="$JAVA_ENDORSED_DIRS" -classpath "$CLASSPATH" \

        -sourcepath "$CATALINA_HOME"/../../java \

        -Dcatalina.base="$CATALINA_BASE" \

        -Dcatalina.home="$CATALINA_HOME" \

        -Djava.io.tmpdir="$CATALINA_TMPDIR" \

        org.apache.catalina.startup.Bootstrap "$@" start

    fi

  fi

elif [ "$1" = "run" ]; then

  shift

  if [ "$1" = "-security" ] ; then

    if [ $have_tty -eq  ]; then

      echo "Using Security Manager"

    fi

    shift

    eval exec "\"$_RUNJAVA\"" "\"$LOGGING_CONFIG\"" $LOGGING_MANAGER $JAVA_OPTS $CATALINA_OPTS \

      -Djava.endorsed.dirs="\"$JAVA_ENDORSED_DIRS\"" -classpath "\"$CLASSPATH\"" \

      -Djava.security.manager \

      -Djava.security.policy=="\"$CATALINA_BASE/conf/catalina.policy\"" \

      -Dcatalina.base="\"$CATALINA_BASE\"" \

      -Dcatalina.home="\"$CATALINA_HOME\"" \

      -Djava.io.tmpdir="\"$CATALINA_TMPDIR\"" \

      org.apache.catalina.startup.Bootstrap "$@" start

  else

    eval exec "\"$_RUNJAVA\"" "\"$LOGGING_CONFIG\"" $LOGGING_MANAGER $JAVA_OPTS $CATALINA_OPTS \

      -Djava.endorsed.dirs="\"$JAVA_ENDORSED_DIRS\"" -classpath "\"$CLASSPATH\"" \

      -Dcatalina.base="\"$CATALINA_BASE\"" \

      -Dcatalina.home="\"$CATALINA_HOME\"" \

      -Djava.io.tmpdir="\"$CATALINA_TMPDIR\"" \

      org.apache.catalina.startup.Bootstrap "$@" start

  fi

elif [ "$1" = "start" ] ; then

  if [ ! -z "$CATALINA_PID" ]; then

    if [ -f "$CATALINA_PID" ]; then

      if [ -s "$CATALINA_PID" ]; then

        echo "Existing PID file found during start."

        if [ -r "$CATALINA_PID" ]; then

          PID=`cat "$CATALINA_PID"`

          ps -p $PID >/dev/null >&

          if [ $? -eq  ] ; then

            echo "Tomcat appears to still be running with PID $PID. Start aborted."

            exit

          else

            echo "Removing/clearing stale PID file."

            rm -f "$CATALINA_PID" >/dev/null >&

            if [ $? !=  ]; then

              if [ -w "$CATALINA_PID" ]; then

                cat /dev/null > "$CATALINA_PID"

              else

                echo "Unable to remove or clear stale PID file. Start aborted."

                exit

              fi

            fi

          fi

        else

          echo "Unable to read PID file. Start aborted."

          exit

        fi

      else

        rm -f "$CATALINA_PID" >/dev/null >&

        if [ $? !=  ]; then

          if [ ! -w "$CATALINA_PID" ]; then

            echo "Unable to remove or write to empty PID file. Start aborted."

            exit

          fi

        fi

      fi

    fi

  fi

  shift

  # touch "$CATALINA_OUT"

  if [ "$1" = "-security" ] ; then

    if [ $have_tty -eq  ]; then

      echo "Using Security Manager"

    fi

    shift

    eval "\"$_RUNJAVA\"" "\"$LOGGING_CONFIG\"" $LOGGING_MANAGER $JAVA_OPTS $CATALINA_OPTS \

      -Djava.endorsed.dirs="\"$JAVA_ENDORSED_DIRS\"" -classpath "\"$CLASSPATH\"" \

      -Djava.security.manager \

      -Djava.security.policy=="\"$CATALINA_BASE/conf/catalina.policy\"" \

      -Dcatalina.base="\"$CATALINA_BASE\"" \

      -Dcatalina.home="\"$CATALINA_HOME\"" \

      -Djava.io.tmpdir="\"$CATALINA_TMPDIR\"" \

      org.apache.catalina.startup.Bootstrap "$@" start \

      >> "$CATALINA_OUT" >& "&"

  else

    eval "\"$_RUNJAVA\"" "\"$LOGGING_CONFIG\"" $LOGGING_MANAGER $JAVA_OPTS $CATALINA_OPTS \

      -Djava.endorsed.dirs="\"$JAVA_ENDORSED_DIRS\"" -classpath "\"$CLASSPATH\"" \

      -Dcatalina.base="\"$CATALINA_BASE\"" \

      -Dcatalina.home="\"$CATALINA_HOME\"" \

      -Djava.io.tmpdir="\"$CATALINA_TMPDIR\"" \

        -XX:+PrintGCDetails \

        -XX:+PrintGCDateStamps \

        -XX:+PrintGCTimeStamps \

        -Xloggc:"$CATALINA_BASE"/logs/gc.log \

      org.apache.catalina.startup.Bootstrap "$@" start "2>&1" | /usr/local/sbin/cronolog -S  "$CATALINA_BASE"/logs/catalina_ln.out "$CATALINA_BASE"/logs/catalina.%Y-%m-%d-%H.out >> /dev/null &

  fi

  if [ ! -z "$CATALINA_PID" ]; then

    echo $! > "$CATALINA_PID"

  fi

  echo "Tomcat started."

elif [ "$1" = "stop" ] ; then

  shift

  SLEEP=

  if [ ! -z "$1" ]; then

    echo $ | grep "[^0-9]" >/dev/null >&

    if [ $? -gt  ]; then

      SLEEP=$

      shift

    fi

  fi

  FORCE=

  if [ "$1" = "-force" ]; then

    shift

    FORCE=

  fi

  if [ ! -z "$CATALINA_PID" ]; then

    if [ -f "$CATALINA_PID" ]; then

      if [ -s "$CATALINA_PID" ]; then

        kill - `cat "$CATALINA_PID"` >/dev/null >&

        if [ $? -gt  ]; then

          echo "PID file found but no matching process was found. Stop aborted."

          exit

        fi

      else

        echo "PID file is empty and has been ignored."

      fi

    else

      echo "\$CATALINA_PID was set but the specified file does not exist. Is Tomcat running? Stop aborted."

      exit

    fi

  fi

  eval "\"$_RUNJAVA\"" $LOGGING_MANAGER $JAVA_OPTS \

    -Djava.endorsed.dirs="\"$JAVA_ENDORSED_DIRS\"" -classpath "\"$CLASSPATH\"" \

    -Dcatalina.base="\"$CATALINA_BASE\"" \

    -Dcatalina.home="\"$CATALINA_HOME\"" \

    -Djava.io.tmpdir="\"$CATALINA_TMPDIR\"" \

    org.apache.catalina.startup.Bootstrap "$@" stop

  # stop failed. Shutdown port disabled? Try a normal kill.

  if [ $? !=  ]; then

    if [ ! -z "$CATALINA_PID" ]; then

      echo "The stop command failed. Attempting to signal the process to stop through OS signal."

      kill - `cat "$CATALINA_PID"` >/dev/null >&

    fi

  fi

  if [ ! -z "$CATALINA_PID" ]; then

    if [ -f "$CATALINA_PID" ]; then

      while [ $SLEEP -ge  ]; do

        kill - `cat "$CATALINA_PID"` >/dev/null >&

        if [ $? -gt  ]; then

          rm -f "$CATALINA_PID" >/dev/null >&

          if [ $? !=  ]; then

            if [ -w "$CATALINA_PID" ]; then

              cat /dev/null > "$CATALINA_PID"

              # If Tomcat has stopped don't try and force a stop with an empty PID file

              FORCE=

            else

              echo "The PID file could not be removed or cleared."

            fi

          fi

      ps -ef | grep tomcat | grep -v grep |  awk '{print $2}' | sed -e "s/^/kill -9 /g"|sh -

          echo "Tomcat stopped."

          break

        fi

        if [ $SLEEP -gt  ]; then

          sleep

        fi

        if [ $SLEEP -eq  ]; then

          if [ $FORCE -eq  ]; then

            echo "Tomcat did not stop in time. PID file was not removed. To aid diagnostics a thread dump has been written to standard out."

            kill - `cat "$CATALINA_PID"`

          fi

        fi

        SLEEP=`expr $SLEEP -  `

      done

    fi

  fi

  KILL_SLEEP_INTERVAL=

  if [ $FORCE -eq  ]; then

    if [ -z "$CATALINA_PID" ]; then

      echo "Kill failed: \$CATALINA_PID not set"

    else

      if [ -f "$CATALINA_PID" ]; then

        PID=`cat "$CATALINA_PID"`

        echo "Killing Tomcat with the PID: $PID"

        kill - $PID

        while [ $KILL_SLEEP_INTERVAL -ge  ]; do

            kill - `cat "$CATALINA_PID"` >/dev/null >&

            if [ $? -gt  ]; then

                rm -f "$CATALINA_PID" >/dev/null >&

                if [ $? !=  ]; then

                    if [ -w "$CATALINA_PID" ]; then

                        cat /dev/null > "$CATALINA_PID"

                    else

                        echo "The PID file could not be removed."

                    fi

                fi

                # Set this to zero else a warning will be issued about the process still running

                KILL_SLEEP_INTERVAL=

                echo "The Tomcat process has been killed."

                break

            fi

            if [ $KILL_SLEEP_INTERVAL -gt  ]; then

                sleep

            fi

            KILL_SLEEP_INTERVAL=`expr $KILL_SLEEP_INTERVAL -  `

        done

        if [ $KILL_SLEEP_INTERVAL -gt  ]; then

            echo "Tomcat has not been killed completely yet. The process might be waiting on some system call or might be UNINTERRUPTIBLE."

        fi

      fi

    fi

  fi

elif [ "$1" = "configtest" ] ; then

    eval "\"$_RUNJAVA\"" $LOGGING_MANAGER $JAVA_OPTS \

      -Djava.endorsed.dirs="\"$JAVA_ENDORSED_DIRS\"" -classpath "\"$CLASSPATH\"" \

      -Dcatalina.base="\"$CATALINA_BASE\"" \

      -Dcatalina.home="\"$CATALINA_HOME\"" \

      -Djava.io.tmpdir="\"$CATALINA_TMPDIR\"" \

      org.apache.catalina.startup.Bootstrap configtest

    result=$?

    if [ $result -ne  ]; then

        echo "Configuration error detected!"

    fi

    exit $result

elif [ "$1" = "version" ] ; then

    "$_RUNJAVA"   \

      -classpath "$CATALINA_HOME/lib/catalina.jar" \

      org.apache.catalina.util.ServerInfo

else

  echo "Usage: catalina.sh ( commands ... )"

  echo "commands:"

  if $os400; then

    echo "  debug             Start Catalina in a debugger (not available on OS400)"

    echo "  debug -security   Debug Catalina with a security manager (not available on OS400)"

  else

    echo "  debug             Start Catalina in a debugger"

    echo "  debug -security   Debug Catalina with a security manager"

  fi

  echo "  jpda start        Start Catalina under JPDA debugger"

  echo "  run               Start Catalina in the current window"

  echo "  run -security     Start in the current window with security manager"

  echo "  start             Start Catalina in a separate window"

  echo "  start -security   Start in a separate window with security manager"

  echo "  stop              Stop Catalina, waiting up to 5 seconds for the process to end"

  echo "  stop n            Stop Catalina, waiting up to n seconds for the process to end"

  echo "  stop -force       Stop Catalina, wait up to 5 seconds and then use kill -KILL if still running"

  echo "  stop n -force     Stop Catalina, wait up to n seconds and then use kill -KILL if still running"

  echo "  configtest        Run a basic syntax check on server.xml - check exit code for result"

  echo "  version           What version of tomcat are you running?"

  echo "Note: Waiting for the process to end and use of the -force option require that \$CATALINA_PID is defined"

  exit 

fi
 
service tomcat start        # 启动

service tomcat stop        # 停止

ps -ef | grep tomcat        # 查看tomcat的运行情况

二、在jar包盛行的时代，需要为各个jar包写一个启动脚本，如下：

#!/bin/bash

#chkconfig:   

PATH_PWD=$(cd `dirname $`;echo `pwd`)

PATH_LOCATION=/etc/init.d

JAR_NAME=$(basename $)

PATH_WEBAPPS=/www/xx/webapps

PATH_TO_JAR=${PATH_WEBAPPS}/${JAR_NAME}/${JAR_NAME}.jar

PATH_LOG=/opt/logs/${JAR_NAME}

COMMAND_CRONOLOG=`find /usr -type f -name "cronolog" | sed -n "1p" | tr -d " "`

COMMAND_SS=`find /usr -type f -name "ss" | sed -n "1p" | tr -d " "`

PID_PATH_NAME=/var/run/${JAR_NAME}.pid

START_COMMAND=""

PORT_DEFAULT=""

JMX_PORT=

if [ x"$PATH_PWD" == x"$PATH_LOCATION" ];then

    :

else

    echo "script ${JAR_NAME} must be in path ${PATH_LOCATION}!"

    exit ;

fi

if [ -f ${PATH_TO_JAR} ];then

    :

else

    echo "${JAR_NAME}.jar doesn't exist in /www/xx/webapps/${JAR_NAME}/";

    exit ;

fi

{

    while :

    do

        if ${COMMAND_SS} -tln |grep -q ":$JMX_PORT"

        then

            ((JMX_PORT++))

        else

            echo "jmx port is $JMX_PORT"

            break

        fi

    done

}

service_check(){

   if [ -L ${PATH_LOG}/${JAR_NAME}_ln.out ];then

      rm -f ${PATH_LOG}/${JAR_NAME}_ln.out && \

      echo "${PATH_LOG}/${JAR_NAME}_ln.out has been deleted."

      return ;

   fi

}

service_status(){

    ps -ef | grep $PATH_TO_JAR | grep -v grep  >/dev/null >&

    if [ $? -ne  ];then

        echo "$JAR_NAME is not running."

        rm -rf $PID_PATH_NAME

        return ;

    else

        echo "$JAR_NAME is running."

        ps -ef | grep $PATH_TO_JAR | grep -v grep | awk '{print $2}' > $PID_PATH_NAME >/dev/null >&

        return ;

    fi

}

service_stop_force(){

    ps -ef | grep $PATH_TO_JAR | grep -v grep  >/dev/null >&

    if [ $? -ne  ];then

        rm -rf $PID_PATH_NAME

        return ;

    else

        echo "$JAR_NAME will be killed by force!"

        ps -ef | grep $PATH_TO_JAR | grep -v grep | awk '{print $2}' | xargs kill -  >/dev/null >&

        rm -rf $PID_PATH_NAME

        return ;

    fi

}

service_start(){

    if [ -f $PID_PATH_NAME ]; then

        echo "$JAR_NAME is already running"

        return ;

    else

        echo "$JAR_NAME starting ..."

        set -e

        nohup java -Dfile.encoding=utf- \

            -Xloggc:${PATH_LOG}/${JAR_NAME}_gc.log \

　　　　　　-XX:+PrintGCDetails　　\

　　　　　　 -XX:+PrintGCTimeStamps \

　　　　　　 -XX:+PrintGCDateStamps \

            -XX:+HeapDumpOnOutOfMemoryError \

            -XX:HeapDumpPath=${PATH_LOG} \

            -Xms256m \

            -Xmx2048m \

            -Duser.timezone=GMT+ \

            -jar $PATH_TO_JAR $START_COMMAND $PORT_DEFAULT >& | $COMMAND_CRONOLOG -S  ${PATH_LOG}/${JAR_NAME}_ln.out ${PATH_LOG}/${JAR_NAME}.%Y-%m-%d-%H.out >> /dev/null  &

        if [ $? -ne  ];then

            echo "$JAR_NAME started  failed"

            exit

        else

            echo $! > $PID_PATH_NAME

            echo "$JAR_NAME started ..."

        fi

        set +e

        return ;

    fi

}

service_stop(){

    if [ -f $PID_PATH_NAME ]; then

        echo "$JAR_NAME stoping ..."

        ps -ef | grep $PATH_TO_JAR | grep -v grep | awk '{print $2}' | xargs kill -  >/dev/null >&

        echo "$JAR_NAME stopped ..."

        rm -rf $PID_PATH_NAME

        return ;

    else

        echo "$JAR_NAME is not running ..."

        return ;

    fi

}                                                                                                                                                                            

service_tag(){

    echo "----------------------------------------------------------------------------------------------------------"

}

service_info(){

    service_tag

    echo "info-use          service ${JAR_NAME} start|stop|status|restart"

    echo "info-jar          $PATH_TO_JAR"

    echo "info-log          ${PATH_LOG}/${JAR_NAME}_ln.out"

    echo "info-gc-log       ${PATH_LOG}/${JAR_NAME}_gc.log"

    echo "info-heapdump-log ${PATH_LOG}"

    echo "info-memory       -Xms256m -Xmx2048m"

    service_tag

}

# 接收命令开始

case "$1" in

    "status")

        service_tag

        service_status

        service_info

        ;;

    "start")

        service_status >/dev/null >&

        service_check

        service_start

        service_tag

        service_status

        ;;

    "stop")

        service_status >/dev/null >&

        service_tag

        service_stop

        sleep

        service_stop_force

        ;;

    "restart")

        service_status >/dev/null >&

        service_stop

        sleep

        service_stop_force

        service_check

        service_start

        service_tag

        service_status

        ;;

    *) echo "Usage: service ${JAR_NAME} status|start|stop|restart" ;;

esac

　　运行脚本：

service ser01 stop    #启动

service ser01 start    #停止

ps -ef | grep java       #服务运行情况

　　shell 脚本确实很方便，虽然这会涉及到另一个专业领域的东西，但是自已使用一下也很安逸呢~

　　尤其在排查问题时， shell方面的知识往往会帮自己很大的忙。

　　想要将自己写的脚本添加到service命令中，只需将该脚本移动到  /etc/init.d/ 目录下，即可以使用  service xxx command 了。