记录下sparkStream的做法(scala)

一直用storm做实时流的开发,之前系统学过spark但是一直没做个模版出来用,国庆节有时间准备做个sparkStream的模板用来防止以后公司要用。（功能模拟华为日常需求,db入库hadoop环境）

1.准备好三台已经安装好集群环境的的机器,在此我用的是linux red hat,集群是CDH5.5版本（公司建议用华为FI和cloudera manager这种会比较稳定些感觉）

2.CRT工具链接上集群环境，启动hadoop集群,本人是一个master两个salve结构（one namenode two datanode）

3.因为spark依赖与ZK,继续启动ZK，此时会选举出一个leader两个follower

4.启动spark，会有一个master两个worder

5.添加kafka代码,分别是生产者，消费者，配置（config）

 /**
  * 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.
  */
 package kafka.examples;

 import java.util.Properties;
 import kafka.producer.KeyedMessage;
 import kafka.producer.ProducerConfig;

 public class Producer extends Thread {
     private final kafka.javaapi.producer.Producer<Integer, String> producer;
     private final String topic;
     private final Properties props = new Properties();

     public Producer(String topic) {
         props.put("serializer.class", "kafka.serializer.StringEncoder");// 字符串消息
         props.put("metadata.broker.list",
                 "spark1:9092,spark2:9092,spark3:9092");
         // Use random partitioner. Don't need the key type. Just set it to
         // Integer.
         // The message is of type String.
         producer = new kafka.javaapi.producer.Producer<Integer, String>(
                 new ProducerConfig(props));
         this.topic = topic;
     }

     public void run() {
         for (int i = 0; i < 500; i++) {
             String messageStr = new String("Message ss" + i);
             System.out.println("product:"+messageStr);
             producer.send(new KeyedMessage<Integer, String>(topic, messageStr));
         }

     }

     public static void main(String[] args) {
         Producer producerThread = new Producer(KafkaProperties.topic);
         producerThread.start();
     }
 }

消费者：(实际上消费者应该是下游的storm或者spark streaming)

/**
 * 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.
 */
package kafka.examples;

import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import kafka.consumer.ConsumerConfig;
import kafka.consumer.ConsumerIterator;
import kafka.consumer.KafkaStream;
import kafka.javaapi.consumer.ConsumerConnector;

public class Consumer extends Thread {
	private final ConsumerConnector consumer;
	private final String topic;

	public Consumer(String topic) {
		consumer = kafka.consumer.Consumer
				.createJavaConsumerConnector(createConsumerConfig());//创建kafka时传入配置文件
		this.topic = topic;
	}
	//配置kafka的配置文件项目
	private static ConsumerConfig createConsumerConfig() {
		Properties props = new Properties();
		props.put("zookeeper.connect", KafkaProperties.zkConnect);
		props.put("group.id", KafkaProperties.groupId);//相同的kafka groupID会给同一个customer消费
		props.put("zookeeper.session.timeout.ms", "400");
		props.put("zookeeper.sync.time.ms", "200");
		props.put("auto.commit.interval.ms", "60000");//

		return new ConsumerConfig(props);

	}
// push消费方式，服务端推送过来。主动方式是pull
	public void run() {
		Map<String, Integer> topicCountMap = new HashMap<String, Integer>();
		topicCountMap.put(topic, new Integer(1));//先整体存到Map中
		Map<String, List<KafkaStream<byte[], byte[]>>> consumerMap = consumer
				.createMessageStreams(topicCountMap);//用consumer创建message流然后放入到consumerMap中
		KafkaStream<byte[], byte[]> stream = consumerMap.get(topic).get(0);//再从流里面拿出来进行迭代
		ConsumerIterator<byte[], byte[]> it = stream.iterator();

		while (it.hasNext()){
			//逻辑处理
			System.out.println(new String(it.next().message()));
		}
	}

	public static void main(String[] args) {
		Consumer consumerThread = new Consumer(KafkaProperties.topic);
		consumerThread.start();
	}
}

　　

配置：

/**
 * 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.
 */
package kafka.examples;

public interface KafkaProperties
{
  final static String zkConnect = "spark1:2181,spark2:2181,spark3:2181";
  final static  String groupId = "group1";
  final static String topic = "tracklog";

//  final static String kafkaServerURL = "localhost";
//  final static int kafkaServerPort = 9092;
//  final static int kafkaProducerBufferSize = 64*1024;
//  final static int connectionTimeOut = 100000;
//  final static int reconnectInterval = 10000;
//  final static String topic2 = "topic2";
//  final static String topic3 = "topic3";
//  final static String clientId = "SimpleConsumerDemoClient";
}

　　6.在idea（我使用的写scala工具）sparkStream本地测试代码,local测试消费kafka

import org.apache.spark.streaming.StreamingContext
import org.apache.spark.SparkConf
import org.apache.spark.streaming.Seconds
import org.apache.spark.streaming.kafka.KafkaUtils
import kafka.serializer.StringDecoder
object kafkaStream2 {
  def main(args:Array[String]):Unit =
  {
       val conf = new SparkConf()
       .setMaster("local")
       .setAppName("kafkaStream2");
       var sc:StreamingContext = new StreamingContext(conf,Seconds(5));
       var kafkaParms = Map{"metadata.broker.list"-> "spark1:9092,spark2:9092,spark3:9092"}
       val topic = Set("tracklog");
       KafkaUtils.createDirectStream[String,String,StringDecoder,StringDecoder](sc, kafkaParms, topic)
        .map(t => t._2)
        .flatMap(_.split(" "))
        .map((_,1))
        .reduceByKey(_ + _)
        .print
        sc.start();
        sc.awaitTermination();
     }
}

　　

此时看到消费已经成功,可以试着写scala逻辑上传到spark集群做测试。我们目地是把kafka 一类MQ流同步到HDFS环境（hbase或者hive HDFS文件等）,所以此时我们先选择固定HDFS目录存成文件块。而且spark机器的提交模式有Standalone模式,yarn Client模式,yarn cluster。我们采取默认local模式避免使用过多资源机器卡死（我的三年前老机器还是比较烂的。。。如果提交--master机器内存马上就光了）

6.编写scala sparkStream 逻辑代码

 import org.apache.spark.streaming.StreamingContext
 import org.apache.spark.SparkConf
 import org.apache.spark.streaming.Seconds
 import org.apache.spark.streaming.kafka.KafkaUtils
 import kafka.serializer.StringDecoder
 import org.apache.hadoop.io.IntWritable
 import org.apache.hadoop.io.Text
 import org.apache.hadoop.mapred.{JobConf, TextOutputFormat}

 object kafkaStream2 {
   def main(args:Array[String]):Unit =
   {
     val conf = new SparkConf()
      .setMaster("local")
       .setAppName("kafkaStream2");
     var sc:StreamingContext = new StreamingContext(conf,Seconds(5));
     var kafkaParms = Map{"metadata.broker.list" -> "spark1:9092,spark2:9092,spark3:9092"}
     val topic = Set("tracklog");
     val rdd_resukt =  KafkaUtils.createDirectStream[String,String,StringDecoder,StringDecoder](sc, kafkaParms, topic)
       .map(t => t._2)
       .flatMap(_.split(" "))
       .map((_,1))
       .reduceByKey(_ + _)
     rdd_resukt.print
     // if(rdd_resukt.isEmpty)
     // rdd_resukt.saveAsTextFiles("D:\\sparkSaveFile.txt")
 //    var jobConf = new JobConf()
 //    jobConf.setOutputFormat(TextOutputFormat[Text,IntWritable])
 //    jobConf.setOutputKeyClass(classOf[Text])
 //    jobConf.setOutputValueClass(classOf[IntWritable])
 //    jobConf.set("mapred.output.dir","/tmp/lxw1234/")
 //    rdd_resukt.saveAsHadoopDataset(jobConf)
     rdd_resukt.saveAsHadoopFiles("/tmp/lxw1234/","test",classOf[Text],classOf[IntWritable],classOf[TextOutputFormat[Text,IntWritable]])
     sc.start();
     sc.awaitTermination();
   }
 }

对应的maven（本人用IDEA，IDEA应该也可以打jar依赖包（kafka需要加入sparkkafka依赖包。）但是这样就失去了maven的本身意义了。因此这里用maven打入依赖）

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.ganymede</groupId>
    <artifactId>sparkplatformstudy</artifactId>
    <version>1.0-SNAPSHOT</version>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <spark.version>1.5.0</spark.version>
        <scala.version>2.10</scala.version>
        <hadoop.version>2.5.0</hadoop.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.apache.spark</groupId>
            <artifactId>spark-core_${scala.version}</artifactId>
            <version>${spark.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.spark</groupId>
            <artifactId>spark-sql_${scala.version}</artifactId>
            <version>${spark.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.spark</groupId>
            <artifactId>spark-hive_${scala.version}</artifactId>
            <version>${spark.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.spark</groupId>
            <artifactId>spark-streaming_${scala.version}</artifactId>
            <version>${spark.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.hadoop</groupId>
            <artifactId>hadoop-client</artifactId>
            <version>2.5.0</version>
        </dependency>
        <dependency>
            <groupId>org.apache.spark</groupId>
            <artifactId>spark-streaming-kafka_${scala.version}</artifactId>
            <version>${spark.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.hadoop</groupId>
            <artifactId>hadoop-common</artifactId>
            <version>2.4.1</version>
        </dependency>
        <dependency>
            <groupId>org.apache.kafka</groupId>
            <artifactId>kafka_2.10</artifactId>
            <version>0.8.1.1</version>
        </dependency>
        <dependency>
            <groupId>com.yammer.metrics</groupId>
            <artifactId>metrics-core</artifactId>
            <version>2.2.0</version>
        </dependency>
    </dependencies>

    <!-- maven官方 http://repo1.maven.org/maven2/  或 http://repo2.maven.org/maven2/ （延迟低一些） -->
    <repositories>
        <repository>
            <id>central</id>
            <name>Maven Repository Switchboard</name>
            <layout>default</layout>
            <url>http://repo2.maven.org/maven2</url>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </repository>
    </repositories>

    <build>
        <sourceDirectory>src/main/scala</sourceDirectory>
        <testSourceDirectory>src/test/scala</testSourceDirectory>

        <plugins>
            <plugin>
                <!-- MAVEN 编译使用的JDK版本 -->
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.3</version>
                <configuration>
                    <source>1.7</source>
                    <target>1.7</target>
                    <encoding>UTF-8</encoding>
                </configuration>

            </plugin>

            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-shade-plugin</artifactId>
                <version>2.1</version>
                <executions>
                    <execution>
                        <phase>package</phase>
                        <goals>
                            <goal>shade</goal>
                        </goals>
                        <configuration>
                            <artifactSet>
                                <includes>
                                    <include>cz.mallat.uasparser:uasparser</include>
                                    <include>net.sourceforge.jregex:jregex</include>
                                    <include>org.apache.spark:spark-streaming-kafka_${scala.version}</include>
                                    <include>org.apache.hadoop:hadoop-common</include>
                                    <include>org.apache.hadoop:hadoop-client</include>
                                    <include>org.apache.kafka:kafka_2.10</include>
                                    <include>com.yammer.metrics:metrics-core</include>
                                </includes>
                            </artifactSet>
                        </configuration>
                    </execution>
                </executions>
            </plugin>

        </plugins>
    </build>
</project>

　　spark sumbit.sh的配置

[root@spark1 kafka]# cat spark_kafka.sh
/usr/local/soft/spark-1.5.1-bin-hadoop2.4/bin/spark-submit \
--class kafkaStream2 \
--num-executors 3 \
--driver-memory 100m \
--executor-memory 100m \
--executor-cores 3 \
/usr/local/spark-study/scala/streaming/kafka/kafkaStream.jar \

　　

此处可以看到生产数据后在集群中已经消费到了数据。

产生的hdfs文件块如下：（因为spark Stream本质上和storm还是很大区别的,属于batch流,所以每个batch会被收集起来做在scala中做相应的逻辑运算。如果时间断很短会产生大量的hdfs细碎文件,这种暂时想到两种解决方案,每个batch都用fileSystem去写文件,可以参考stormHDFS思路。或者另开线程进行定时压缩合并操作）

好了,到这里关于scala下的sparkStream就练习完了。写的过程用自己集群还是莫名其妙问题比较多（比如重启集群环境就好了,可能开太久集群断开了,maven库下载过久的一些问题,大多百度可以解决。20171003笔记）