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    Ubuntu下使用Spark Streaming处理来自FlumeNG的流数据基本方法

    Big Data 江海志 5360浏览 0评论

    SparkStreaming是一个对实时数据流进行高通量、容错处理的流式处理系统，可以对多种数据源（如Kdfka、Flume、Twitter、Zero和TCP 套接字）进行类似map、reduce、join、window等复杂操作，并将结果保存到外部文件系统、数据库或应用到实时仪表盘。

     

    Spark Streaming流式处理系统特点有：

    •  将流式计算分解成一系列短小的批处理作业
    •  将失败或者执行较慢的任务在其它节点上并行执行
    •  较强的容错能力(基于RDD继承关系Lineage)
    •  使用和RDD一样的语义

    本文将Spark Streaming结合FlumeNG，然后以源码中的JavaFlumeEventCount作参考，建立maven工程，打包在spark standalone集群运行。

    一、步骤

    1.建立maven工程，写好pom.xml

    需要spark streaming的flume插件包，jar的maven地址如下，填入pom.xml中

    1 <dependency>
2     <groupId>org.apache.spark</groupId>
3     <artifactId>spark-streaming-flume_2.10</artifactId>
4     <version>1.1.0</version>
5 </dependency>

    完整的pom.xml

    <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>test</groupId>
    <artifactId>hq</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <build>
    <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>2.3.2</version>
                <configuration>
                    <source>1.6</source>
                    <target>1.6</target>
                    <compilerVersion>1.6</compilerVersion>
                    <encoding>UTF-8</encoding>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-jar-plugin</artifactId>
                <version>2.3.2</version>
                <configuration>
                    <archive>
                        <manifest>
                            <addClasspath>true</addClasspath>
                            <classpathPrefix>.</classpathPrefix>
                            <mainClass>JavaFlumeEventCount</mainClass>
                        </manifest>
                    </archive>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-assembly-plugin</artifactId>
                <version>2.4</version>
                <configuration>
                  <descriptorRefs>
                    <descriptorRef>jar-with-dependencies</descriptorRef>
                  </descriptorRefs>
                </configuration>
            </plugin>
        </plugins>
    </build>
    <dependencies>
        <dependency>
            <groupId>org.apache.spark</groupId>
            <artifactId>spark-streaming-flume_2.10</artifactId>
            <version>1.1.0</version>
        </dependency>
    </dependencies>
</project>

    2.编码并且打包

    JavaCode：

    import org.apache.spark.SparkConf;
import org.apache.spark.api.java.function.Function;
import org.apache.spark.streaming.*;
import org.apache.spark.streaming.api.java.*;
import org.apache.spark.streaming.flume.FlumeUtils;
import org.apache.spark.streaming.flume.SparkFlumeEvent;

public final class JavaFlumeEventCount {
    private JavaFlumeEventCount() {
    }

    public static void main(String[] args) {

        String host = args[0];
        int port = Integer.parseInt(args[1]);

        Duration batchInterval = new Duration(Integer.parseInt(args[2]));
        SparkConf sparkConf = new SparkConf().setAppName("JavaFlumeEventCount");
        JavaStreamingContext ssc = new JavaStreamingContext(sparkConf,
                batchInterval);
        JavaReceiverInputDStream<SparkFlumeEvent> flumeStream = FlumeUtils
                .createStream(ssc, host, port);

        flumeStream.count();

        flumeStream.count().map(new Function<Long, String>() {
            private static final long serialVersionUID = -572435064083746235L;

            public String call(Long in) {
                return "Received " + in + " flume events.";
            }
        }).print();

        ssc.start();
        ssc.awaitTermination();
    }
}

    此处可以参照spark官方编程指导中发布应用的方法，在linux下打包应用

    得到工程的target目录下得到jar包：hq-0.0.1-SNAPSHOT.jar

    3.将3个jar包上传到服务器，准备运行

    除了自身打的jar包外，运行还需要：spark-streaming-flume_2.10-1.1.0.jar, flume-ng-sdk-1.4.0.jar 这2个jar包（我使用的flume-ng版本是1.4.0）可以在flume官网下载

    将3个jar包上传到服务器~/spark/test/目录下。

    4.命令行提交任务，运行

    [ebupt@eb174 test]$ /opt/spark-hadoop/bin/spark-submit –master local[4] –name FlumeStreaming –class JavaFlumeEventCount –jars spark-streaming-flume_2.10-1.5.2.jar,flume-ng-sdk-1.6.0.jar hq.jar localhost 10086 5000

    此处我采用local模式运行spark， local[4] 表示本地模式下启用四个cpu核来处理数据

     localhost 10086 为flume发送端定义的接受数据的服务器 极其端口

    注意：参数解释：spark-submit –help。自己可以根据需要修改内存，防止OOM。另外jars可以同时加载多个jar包，逗号分隔。指定的运行类后需要指定3个参数。

    5.开启flume-ng，启动数据源

    书写好flume的agent配置文件spark-flumeng.conf，内容如下：

     1 #Agent5
 2 #List the sources, sinks and channels for the agent
 3 agent5.sources =  source1
 4 agent5.sinks =  hdfs01
 5 agent5.channels = channel1
 6 
 7 #set channel for sources and sinks
 8 agent5.sources.source1.channels = channel1
 9 agent5.sinks.hdfs01.channel = channel1
10 
11 #properties of someone source
12 agent5.sources.source1.type = spooldir
13 agent5.sources.source1.spoolDir = /home/hadoop/huangq/spark-flumeng-data/
14 agent5.sources.source1.ignorePattern = .*(\\.index|\\.tmp|\\.xml)$
15 agent5.sources.source1.fileSuffix = .1
16 agent5.sources.source1.fileHeader = true
17 agent5.sources.source1.fileHeaderKey = filename
18 
19 # set interceptors
20 agent5.sources.source1.interceptors = i1 i2
21 agent5.sources.source1.interceptors.i1.type = org.apache.flume.interceptor.HostInterceptor$Builder
22 agent5.sources.source1.interceptors.i1.preserveExisting = false
23 agent5.sources.source1.interceptors.i1.hostHeader = hostname
24 agent5.sources.source1.interceptors.i1.useIP=false
25 agent5.sources.source1.interceptors.i2.type = org.apache.flume.interceptor.TimestampInterceptor$Builder
26 
27 #properties of mem-channel-1
28 agent5.channels.channel1.type = memory
29 agent5.channels.channel1.capacity = 100000
30 agent5.channels.channel1.transactionCapacity = 100000
31 agent5.channels.channel1.keep-alive = 30
32 
33 #properties of sink
34 agent5.sinks.hdfs01.type = avro
35 agent5.sinks.hdfs01.hostname = localhost
36 agent5.sinks.hdfs01.port = 10086

    启动flume-ng: [hadoop@eb170 flume]$ bin/flume-ng agent -n agent5 -c conf  -f conf/spark-flumeng.conf 

    注意：

    ①flume的sink要用avro，指定要发送到的spark集群中的一个节点，我们这里是localhost:10086。

    ②如果没有指定Flume的sdk包，会出现错误：　java.lang.NoClassDefFoundError: Lorg/apache/flume/source/avro/AvroFlumeEvent;没有找到类。这个类在flume的sdk包内，在jars参数中指定jar包位置就可以。

    ③将自己定义的运行jar包单独列出，不要放在jars参数指定，否则也会有错误抛出。

    6.运行结果

    在提交spark任务的客户端可以看到，看到大量的输出信息，然后可以看到有数据的RDD会统计出这个RDD有多少行，统计结果如下：

     1 Spark assembly has been built with Hive, including Datanucleus jars on classpath 
     2 Using Spark's default log4j profile: org/apache/spark/log4j-defaults.properties 
     3 15/12/5 19:00:44 INFO SecurityManager: Changing view acls to: ebupt, 
     4 15/12/5 19:00:44 INFO SecurityManager: Changing modify acls to: ebupt, 
     5 15/12/5 19:00:44 INFO SecurityManager: SecurityManager: authentication disabled; ui acls disabled; users with view permissions: Set(ebupt, ); users with modify permissions: Set(ebupt, ) 
     6 15/12/5 19:00:45 INFO Slf4jLogger: Slf4jLogger started 
     7 15/12/5 19:00:45 INFO Remoting: Starting remoting 
     8 15/12/5 19:00:45 INFO Remoting: Remoting started; listening on addresses :[akka.tcp://sparkDriver@eb174:51147] 
     9 15/12/5 19:00:45 INFO Remoting: Remoting now listens on addresses: [akka.tcp://sparkDriver@eb174:51147] 
    10 15/12/5 19:00:45 INFO Utils: Successfully started service 'sparkDriver' on port 51147. 
    11 15/12/5 19:00:45 INFO SparkEnv: Registering MapOutputTracker 
    12 15/12/5 19:00:45 INFO SparkEnv: Registering BlockManagerMaster
    13 ....
    14 .....
    15 15/12/5 19:09:21 INFO DAGScheduler: Missing parents: List()
    16 15/12/5 19:09:21 INFO DAGScheduler: Submitting Stage 145 (MappedRDD[291] at map at MappedDStream.scala:35), which has no missing parents
    17 15/12/5 19:09:21 INFO MemoryStore: ensureFreeSpace(3400) called with curMem=13047, maxMem=278302556
    18 15/12/5 19:09:21 INFO MemoryStore: Block broadcast_110 stored as values in memory (estimated size 3.3 KB, free 265.4 MB)
    19 15/12/5 19:09:21 INFO MemoryStore: ensureFreeSpace(2020) called with curMem=16447, maxMem=278302556
    20 15/12/5 19:09:21 INFO MemoryStore: Block broadcast_110_piece0 stored as bytes in memory (estimated size 2020.0 B, free 265.4 MB)
    21 15/12/5 19:09:21 INFO BlockManagerInfo: Added broadcast_110_piece0 in memory on eb174 (size: 2020.0 B, free: 265.4 MB)
    22 15/12/5 19:09:21 INFO BlockManagerMaster: Updated info of block broadcast_110_piece0
    23 15/12/5 19:09:21 INFO DAGScheduler: Submitting 1 missing tasks from Stage 145 (MappedRDD[291] at map at MappedDStream.scala:35)
    24 15/12/5 19:09:21 INFO TaskSchedulerImpl: Adding task set 145.0 with 1 tasks
    25 15/12/5 19:09:21 INFO TaskSetManager: Starting task 0.0 in stage 145.0 (TID 190, eb175, PROCESS_LOCAL, 1132 bytes)
    26 15/12/5 19:09:21 INFO BlockManagerInfo: Added broadcast_110_piece0 in memory on eb175 (size: 2020.0 B, free: 519.6 MB)
    27 15/12/5 19:09:21 INFO TaskSetManager: Finished task 0.0 in stage 145.0 (TID 190) in 25 ms on eb175 (1/1)
    28 15/12/5 19:09:21 INFO DAGScheduler: Stage 145 (take at DStream.scala:608) finished in 0.026 s
    29 15/12/5 19:09:21 INFO TaskSchedulerImpl: Removed TaskSet 145.0, whose tasks have all completed, from pool 
    30 15/12/5 19:09:21 INFO SparkContext: Job finished: take at DStream.scala:608, took 0.036589357 s
    31 -------------------------------------------
    32 Time: 1413198560000 ms
    33 -------------------------------------------
    34 Received 35300 rows of flume events.
    35 
    36 15/12/5 19:09:55 INFO JobScheduler: Finished job streaming job 1413198595000 ms.0 from job set of time 1413198595000 ms 
    37 15/12/5 19:09:55 INFO JobScheduler: Total delay: 0.126 s for time 1413198595000 ms (execution: 0.112 s) 
    38 15/12/5 19:09:55 INFO MappedRDD: Removing RDD 339 from persistence list 
    39 15/12/5 19:09:55 INFO BlockManager: Removing RDD 339 
    40 15/12/5 19:09:55 INFO MappedRDD: Removing RDD 338 from persistence list 
    41 15/12/5 19:09:55 INFO BlockManager: Removing RDD 338 
    42 15/12/5 19:09:55 INFO MappedRDD: Removing RDD 337 from persistence list 
    43 15/12/5 19:09:55 INFO BlockManager: Removing RDD 337 
    44 15/12/5 19:09:55 INFO ShuffledRDD: Removing RDD 336 from persistence list 
    45 15/12/5 19:09:55 INFO BlockManager: Removing RDD 336 
    46 15/12/5 19:09:55 INFO UnionRDD: Removing RDD 335 from persistence list 
    47 15/12/5 19:09:55 INFO BlockManager: Removing RDD 335 
    48 15/12/5 19:09:55 INFO MappedRDD: Removing RDD 333 from persistence list 
    49 15/12/5 19:09:55 INFO BlockManager: Removing RDD 333 
    50 15/12/5 19:09:55 INFO BlockRDD: Removing RDD 332 from persistence list 
    51 15/12/5 19:09:55 INFO BlockManager: Removing RDD 332 
    52 ...
    53 ...
    54 15/12/5 19:10:00 INFO TaskSchedulerImpl: Adding task set 177.0 with 1 tasks 
    55 15/12/5 19:10:00 INFO TaskSetManager: Starting task 0.0 in stage 177.0 (TID 215, eb175, PROCESS_LOCAL, 1132 bytes) 
    56 15/12/5 19:10:00 INFO BlockManagerInfo: Added broadcast_134_piece0 in memory on eb175 (size: 2021.0 B, free: 530.2 MB) 
    57 15/12/5 19:10:00 INFO TaskSetManager: Finished task 0.0 in stage 177.0 (TID 215) in 24 ms on eb175 (1/1) 
    58 15/12/5 19:10:00 INFO DAGScheduler: Stage 177 (take at DStream.scala:608) finished in 0.024 s 
    59 15/12/5 19:10:00 INFO TaskSchedulerImpl: Removed TaskSet 177.0, whose tasks have all completed, from pool 
    60 15/12/5 19:10:00 INFO SparkContext: Job finished: take at DStream.scala:608, took 0.033844743 s 
    61 ------------------------------------------- 
    62 Time: 1413198600000 ms 
    63 ------------------------------------------- 
    64 Received 0 rows of flume events.

    二、结论

    • flume-ng与spark的结合成功，可根据需要灵活编写相关的类来实现实时处理FlumeNG传输的数据。
    • spark streaming和多种数据源结合，达到实时计算处理的能力。

    三、参考资料

    1. Spark Streaming和Flume-NG对接实验
    2. Spark和Flume-ng整合
    3. Flume sink 配置手册
    4. http://www.cnblogs.com/byrhuangqiang/p/4022940.html?utm_source=tuicool&utm_medium=referral

    转载请注明：江海志の博客 » Ubuntu下使用Spark Streaming处理来自FlumeNG的流数据基本方法

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