apache dolphin scheduler 文件dolphinscheduler-daemon.sh详解

#!/bin/sh
#
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License.  You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# 提示使用方法的函数usage
usage="Usage: dolphinscheduler-daemon.sh (start|stop|status)  "

# 如果没有参数指定，提示usage函数，$#代表传递的参数个数 -le =less than
# if no args specified, show usage
if [ $# -le 1 ]; then
  echo $usage
  exit 1
fi

# 用startStop变量接收第一个参数
startStop=$1
# 用于对参数的左移，同时参数的个数减一
# 比如sh ./bin/dolphinscheduler-daemon.sh start standalone-server ，下面的command = standalone-server
shift
command=$1
shift

echo "Begin $startStop $command......"

# 倒引号表示里面是需要执行的命令
# 这个命令写在脚本文件里才有作用，他返回这个脚本文件放置的目录，并可以根据这个目录来定位所要运行程序的相对位置
BIN_DIR=`dirname $0`
#pwd 返回当前的绝对路径
BIN_DIR=`cd "$BIN_DIR"; pwd`
# 用export定义的环境变量，子shell依然可以使用
export DOLPHINSCHEDULER_HOME=`cd "$BIN_DIR/.."; pwd`
# 改变文件的访问权限 递归修改目录权限为文件所有者的读写执行
chmod -R 700 ${DOLPHINSCHEDULER_HOME}/conf/config
# 使用户环境变量生效
source /etc/profile
# 将声明的变量提升为环境变量
set -a
source "${DOLPHINSCHEDULER_HOME}/conf/env/dolphinscheduler_env.sh"
source "${DOLPHINSCHEDULER_HOME}/conf/config/install_config.conf"
set +a

export HOSTNAME=`hostname`

export DOLPHINSCHEDULER_PID_DIR=$DOLPHINSCHEDULER_HOME/pid
export DOLPHINSCHEDULER_LOG_DIR=$DOLPHINSCHEDULER_HOME/logs
export DOLPHINSCHEDULER_CONF_DIR=$DOLPHINSCHEDULER_HOME/conf
export DOLPHINSCHEDULER_SQL_DIR=$DOLPHINSCHEDULER_HOME/sql
export DOLPHINSCHEDULER_LIB_JARS=$DOLPHINSCHEDULER_HOME/lib/*

export STOP_TIMEOUT=5
# 判断如果LOGDIR不存在
if [ ! -d "$DOLPHINSCHEDULER_LOG_DIR" ]; then
  mkdir $DOLPHINSCHEDULER_LOG_DIR
fi

log=$DOLPHINSCHEDULER_LOG_DIR/dolphinscheduler-$command-$HOSTNAME.out
pid=$DOLPHINSCHEDULER_PID_DIR/dolphinscheduler-$command.pid

cd $DOLPHINSCHEDULER_HOME
# 定义环境变量：JVM参数：
# 服务器模式  元空间（在本地内存中，而不是在jvm中）  xss栈内存大小（决定函数调用的深度，超出的话报stackoverflow）  UseParNewGC 年轻代用的是多线程并行回收parnew gc算法，比较古老的算法，但是比较好用
# UseConcMarkSweepGC 使用CMS算法，并发标记清除算法，使用的经典的parnew+cms对新生代和老年代的回收  CMSParallelRemarkEnabled 启用并行标记，降低标记停顿
# LargePageSizeInBytes 内存页的大小 UseCMSInitiatingOccupancyOnly 使用设定的回收阈值(下面指定的70%)开始CMS收集 CMSInitiatingOccupancyFraction 使用cms作为垃圾回收使用70％后开始CMS收集
# XshowSettings 把这些设置信息打印出来
export DOLPHINSCHEDULER_OPTS="-server -XX:MetaspaceSize=128m -XX:MaxMetaspaceSize=128m -Xss512k -XX:+UseParNewGC -XX:+UseConcMarkSweepGC -XX:+CMSParallelRemarkEnabled -XX:LargePageSizeInBytes=128m -XX:+UseCMSInitiatingOccupancyOnly -XX:CMSInitiatingOccupancyFraction=70 -XX:+PrintGCDetails -Xloggc:$DOLPHINSCHEDULER_LOG_DIR/gc.log -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=dump.hprof -XshowSettings:vm $DOLPHINSCHEDULER_OPTS"

export DATABASE_TYPE=${DATABASE_TYPE:-"h2"}
export SPRING_PROFILES_ACTIVE=${SPRING_PROFILES_ACTIVE:-"default"}

# 根据command 定义LOG_FILE 启动主类和jvm堆内存的参数
if [ "$command" = "api-server" ]; then
  LOG_FILE="-Dlogging.config=classpath:logback-api.xml"
  CLASS=org.apache.dolphinscheduler.api.ApiApplicationServer
  HEAP_OPTS="-Xms1g -Xmx1g -Xmn512m"
  export DOLPHINSCHEDULER_OPTS="$HEAP_OPTS $DOLPHINSCHEDULER_OPTS $API_SERVER_OPTS"
  export SPRING_PROFILES_ACTIVE="${SPRING_PROFILES_ACTIVE},api,${DATABASE_TYPE}"
elif [ "$command" = "master-server" ]; then
  LOG_FILE="-Dlogging.config=classpath:logback-master.xml"
  CLASS=org.apache.dolphinscheduler.server.master.MasterServer
  HEAP_OPTS="-Xms4g -Xmx4g -Xmn2g"
  export DOLPHINSCHEDULER_OPTS="$HEAP_OPTS $DOLPHINSCHEDULER_OPTS $MASTER_SERVER_OPTS"
  export SPRING_PROFILES_ACTIVE="${SPRING_PROFILES_ACTIVE},master,${DATABASE_TYPE}"
elif [ "$command" = "worker-server" ]; then
  LOG_FILE="-Dlogging.config=classpath:logback-worker.xml"
  CLASS=org.apache.dolphinscheduler.server.worker.WorkerServer
  HEAP_OPTS="-Xms2g -Xmx2g -Xmn1g"
  export DOLPHINSCHEDULER_OPTS="$HEAP_OPTS $DOLPHINSCHEDULER_OPTS $WORKER_SERVER_OPTS"
  export SPRING_PROFILES_ACTIVE="${SPRING_PROFILES_ACTIVE},worker,${DATABASE_TYPE}"
elif [ "$command" = "alert-server" ]; then
  LOG_FILE="-Dlogback.configurationFile=conf/logback-alert.xml"
  CLASS=org.apache.dolphinscheduler.alert.AlertServer
  HEAP_OPTS="-Xms1g -Xmx1g -Xmn512m"
  export DOLPHINSCHEDULER_OPTS="$HEAP_OPTS $DOLPHINSCHEDULER_OPTS $ALERT_SERVER_OPTS"
  export SPRING_PROFILES_ACTIVE="${SPRING_PROFILES_ACTIVE},alert,${DATABASE_TYPE}"
elif [ "$command" = "logger-server" ]; then
  CLASS=org.apache.dolphinscheduler.server.log.LoggerServer
  HEAP_OPTS="-Xms1g -Xmx1g -Xmn512m"
  export DOLPHINSCHEDULER_OPTS="$HEAP_OPTS $DOLPHINSCHEDULER_OPTS $LOGGER_SERVER_OPTS"
elif [ "$command" = "standalone-server" ]; then
  CLASS=org.apache.dolphinscheduler.server.StandaloneServer
  export SPRING_PROFILES_ACTIVE="${SPRING_PROFILES_ACTIVE},standalone,${DATABASE_TYPE}"
elif [ "$command" = "python-gateway-server" ]; then
  CLASS=org.apache.dolphinscheduler.server.PythonGatewayServer
  export SPRING_PROFILES_ACTIVE="${SPRING_PROFILES_ACTIVE},python-gateway,${DATABASE_TYPE}"
else
  echo "Error: No command named '$command' was found."
  exit 1
fi

case $startStop in
  (start)
    # 如果使用docker
    if [ "$DOCKER" = "true" ]; then
      echo start $command in docker
      # UseContainerSupport 使用容器内存
      export DOLPHINSCHEDULER_OPTS="$DOLPHINSCHEDULER_OPTS -XX:-UseContainerSupport"
      # 附加环境变量后执行主类
      exec_command="$LOG_FILE $DOLPHINSCHEDULER_OPTS -classpath $DOLPHINSCHEDULER_SQL_DIR:$DOLPHINSCHEDULER_CONF_DIR:$DOLPHINSCHEDULER_LIB_JARS $CLASS"
      $JAVA_HOME/bin/java $exec_command
    else
      # 判断目录是否有写权限 或者创建目录 -w文件或目录的操作符
      [ -w "$DOLPHINSCHEDULER_PID_DIR" ] || mkdir -p "$DOLPHINSCHEDULER_PID_DIR"
      # 判断是否为一般文件
      if [ -f $pid ]; then
        # 先杀pid进程
        if kill -0 `cat $pid` > /dev/null 2>&1; then
          echo $command running as process `cat $pid`.  Stop it first.
          exit 1
        fi
      fi

      echo starting $command, logging to $log
      exec_command="$LOG_FILE $DOLPHINSCHEDULER_OPTS -classpath $DOLPHINSCHEDULER_SQL_DIR:$DOLPHINSCHEDULER_CONF_DIR:$DOLPHINSCHEDULER_LIB_JARS $CLASS"
      echo "nohup $JAVA_HOME/bin/java $exec_command > $log 2>&1 &"
      nohup $JAVA_HOME/bin/java $exec_command > $log 2>&1 &
      # $! Shell最后运行的后台Process的PID（后台运行的最后一个进程的 进程ID号）
      echo $! > $pid
    fi
    ;;

  (stop)

      if [ -f $pid ]; then
        TARGET_PID=`cat $pid`
        if kill -0 $TARGET_PID > /dev/null 2>&1; then
          echo stopping $command
          kill $TARGET_PID
          sleep $STOP_TIMEOUT
          # 0没有杀掉 直接用9杀，酒杀掉两滴血 更直接
          if kill -0 $TARGET_PID > /dev/null 2>&1; then
            echo "$command did not stop gracefully after $STOP_TIMEOUT seconds: killing with kill -9"
            kill -9 $TARGET_PID
          fi
        else
          echo no $command to stop
        fi
        rm -f $pid
      else
        echo no $command to stop
      fi
      ;;

  (status)
    # more details about the status can be added later
    serverCount=`ps -ef | grep "$DOLPHINSCHEDULER_HOME" | grep "$CLASS" | grep -v "grep" | wc -l`
    state="STOP"
    #  font color - red
    state="[ \033[1;31m $state \033[0m ]"
    if [[ $serverCount -gt 0 ]];then
      state="RUNNING"
      # font color - green
      state="[ \033[1;32m $state \033[0m ]"
    fi
    echo -e "$command  $state"
    ;;

  (*)
    echo $usage
    exit 1
    ;;

esac

echo "End $startStop $command."