Spark Streaming整合logstash + Kafka wordCount

1、安装logstash，直接解压即可

测试logstash是否可以正常运行

bin/logstash -e 'input { stdin { } } output { stdout {codec => rubydebug } }'

只获取消息

bin/logstash -e 'input { stdin { } } output { stdout {codec => plain { format => "%{message}" } } }'

2、编写logstash配置文件
2、1在logstash目录下创建conf目录
2、2在conf目录下创建文件logstash.conf,内容如下

input {
file {
type => "logs"
path => "/home/hadoop/logs/*.log"
discover_interval => 10
start_position => "beginning" 
}
}

output {
kafka {
codec => plain {
format => "%{message}"
}
topic_id => "spark"	
}
}

logstash input: https://www.elastic.co/guide/en/logstash/current/input-plugins.html
logstash output: https://www.elastic.co/guide/en/logstash/current/output-plugins.html

3、启动logstash采集数据

bin/logstash -f conf/logstash.conf

4、代码

package bigdata.spark

import org.apache.spark.streaming.kafka.KafkaUtils
import org.apache.spark.streaming.{Seconds, StreamingContext}
import org.apache.spark.{SparkContext, SparkConf}

/**
  * Created by Administrator on 2017/4/28.
  */
object SparkStreamDemo {
  def main(args: Array[String]) {

    val conf = new SparkConf()
    conf.setAppName("spark_streaming")
    conf.setMaster("local[*]")

    val sc = new SparkContext(conf)
    sc.setCheckpointDir("D:/checkpoints")
    sc.setLogLevel("ERROR")

    val ssc = new StreamingContext(sc, Seconds(5))

    val topics = Map("spark" -> 2)
    val lines = KafkaUtils.createStream(ssc, "m1:2181,m2:2181,m3:2181", "spark", topics).map(_._2)

    val ds1 = lines.flatMap(_.split(" ")).map((_, 1))

    val ds2 = ds1.updateStateByKey[Int]((x:Seq[Int], y:Option[Int]) => {
      Some(x.sum + y.getOrElse(0))
    })

    ds2.print()

    ssc.start()
    ssc.awaitTermination()

  }
}