写一个shell 快速启动停止你的微服务吧

　　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。