sparkstreaming实时流处理项目（二）

1.log4j的日志采集到flume

log4j.properties如下，这样可以将控制台的信息输出到flume中：

#配置
log4j.rootLogger=INFO,stdout,flume

#stdout
log4j.appender.stdout = org.apache.log4j.ConsoleAppender
log4j.appender.stdout.target = System.out
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss,SSS} [%t] [%c] [%p] - %m%n

#flume
log4j.appender.flume = org.apache.flume.clients.log4jappender.Log4jAppender
log4j.appender.flume.Hostname = 192.168.48.138
log4j.appender.flume.Port = 41414
log4j.appender.flume.UnsafeMode = true

streaming.conf将flume的信息输出到kafka,kafka下沉到logger中：

agent1.sources=avro-source
agent1.channels=logger-channel
agent1.sinks=log-sink

#define source
agent1.sources.avro-source.type=avro
agent1.sources.avro-source.bind=0.0.0.0
agent1.sources.avro-source.port=41414

#define channel
agent1.channels.logger-channel.type=memory

#define sink
agent1.sinks.log-sink.type=logger

agent1.sources.avro-source.channels=logger-channel
agent1.sinks.log-sink.channel=logger-channel

启动flume

flume-ng agent --name agent1 --conf $FLUME_HOME/conf --conf-file $FLUME_HOME/conf/streaming.conf -Dflume.root.logger=INFO,console

运行程序产生日志文件：

flume将采集得到的文件打印：

2.将flume采集的数据下沉到kafka

启动kafka：

zkServer.sh start
kafka-server-start.sh  ../config/server.properties

编写flume的streaming2.conf将flume的数据下沉到kafka,
streaming2.conf中的数据：

agent1.sources=avro-source
agent1.channels=logger-channel
agent1.sinks=kafka-sink

#define source
agent1.sources.avro-source.type=avro
agent1.sources.avro-source.bind=0.0.0.0
agent1.sources.avro-source.port=41414

#define channel
agent1.channels.logger-channel.type=memory

#define sink
agent1.sinks.kafka-sink.type=org.apache.flume.sink.kafka.KafkaSink
agent1.sinks.kafka-sink.topic = streamingtopic
agent1.sinks.kafka-sink.brokerList = hadoop000:9092
agent1.sinks.kafka-sink.requiredAcks = 1
agent1.sinks.kafka-sink.batchSize = 20

agent1.sources.avro-source.channels=logger-channel
agent1.sinks.kafka-sink.channel=logger-channel

在kafka中创建一个topic

kafka-topics.sh --create --zookeeper localhost:2181 --replication-factor 1 --partitions 3 --topic streamingtopic

查看topic列表

kafka-topics.sh --list --zookeeper  hadoop000:2181

在kafka中创建一个消费者去消费

kafka-console-consumer.sh --zookeeper localhost:2181 --topic streamingtopic --from-beginning

出现如下，表示成功：

sparkstreaming消费kafka数据

package com.qianliu

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

/** * Spark Streaming对接Kafka */
object KafkaStreamingApp {

  def main(args: Array[String]): Unit = {
    //设置日志文件
    LoggerLevels.setStreamingLogLevels()

    //判断输入的数据长度是否符合要去
    if(args.length != 4) {
      System.err.println("Usage: KafkaStreamingApp <zkQuorum> <group> <topics> <numThreads>")
    }

    //初始化输入的数据为Array
    val Array(zkQuorum, group, topics, numThreads) = args

    //初始化sparkcontext
    val sparkConf = new SparkConf().setAppName("KafkaReceiverWordCount")
      .setMaster("local[2]")
    sparkConf.set("spark.testing.memory", "512000000")
    //sparkstreamingcontext
    val ssc = new StreamingContext(sparkConf, Seconds(5))

    //将多个topic输入
    val topicMap = topics.split(",").map((_, numThreads.toInt)).toMap

    // TODO... Spark Streaming如何对接Kafka
    val messages = KafkaUtils.createStream(ssc, zkQuorum, group,topicMap)

    // TODO... 自己去测试为什么要取第二个
    messages.map(_._2).count().print()

    //启动spark
    ssc.start()
    ssc.awaitTermination()
  }
}