flume从log4j收集日志输出到kafka

1. flume安装

(1)下载：wget http://archive.cloudera.com/cdh5/cdh/5/flume-ng-1.6.0-cdh5.7.1.tar.gz

(2)解压：tar zxvf flume-ng-1.6.0-cdh5.7.1.tar.gz

(3)环境变量：

export FLUME_HOME=/xxx/soft/apache-flume-1.6.0-cdh5.7.1-bin
export PATH=$PATH:$FLUME_HOME/bin

source /etc/profile

vim conf/flume-env.sh

export JAVA_HOME=/letv/soft/java
export HADOOP_HOME=/etc/hadoop

　　

(4)创建avro.conf

vim conf/avro.conf
 
a1.sources=source1
a1.channels=channel1
a1.sinks=sink1
 
a1.sources.source1.type=avro
a1.sources.source1.bind=10.112.28.240
a1.sources.source1.port=4141
a1.sources.source1.channels = channel1
 
a1.channels.channel1.type=memory
a1.channels.channel1.capacity=10000
a1.channels.channel1.transactionCapacity=1000
a1.channels.channel1.keep-alive=30
 
a1.sinks.sink1.type = org.apache.flume.sink.kafka.KafkaSink
a1.sinks.sink1.topic = hdtest.topic.jenkin.com
a1.sinks.sink1.brokerList = 10.11.97.57:9092,10.11.97.58:9092,10.11.97.60:9092
a1.sinks.sink1.requiredAcks = 0
a1.sinks.sink1.sink.batchSize = 20
a1.sinks.sink1.channel = channel1

　　

source1.bind：flume安装的服务器

sink1.brokerList：kafka集群

sink1.topic：发往kafka的topic

　　

(5)运行flume：

flume-ng agent --conf /xxx/soft/apache-flume-1.6.0-cdh5.7.1-bin/conf --conf-file /xxx/soft/apache-flume-1.6.0-cdh5.7.1-bin/conf/avro.conf --name a1 -Dflume.root.logger=INFO,console

　　

2. 编写日志生产程序

（1）工程结构

2. log4j.properties

log4j.rootLogger=INFO,console
 
# for package com.demo.kafka, log would be sent to kafka appender.
log4j.logger.com.demo.flume=info,stdout,file,flume
 
### flume ###
log4j.appender.flume = org.apache.flume.clients.log4jappender.Log4jAppender
log4j.appender.flume.Hostname = 10.112.28.240
log4j.appender.flume.Port = 4141
log4j.appender.flume.UnsafeMode = true
log4j.appender.flume.layout=org.apache.log4j.PatternLayout
log4j.appender.flume.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %p [%c:%L] - %m%n
 
# appender console
log4j.appender.console=org.apache.log4j.ConsoleAppender
log4j.appender.console.target=System.out
log4j.appender.console.layout=org.apache.log4j.PatternLayout
log4j.appender.console.layout.ConversionPattern=%d [%-5p] [%t] - [%l] %m%n
 
### file ###
log4j.appender.file=org.apache.log4j.DailyRollingFileAppender
log4j.appender.file.Threshold=INFO
log4j.appender.file.File=./logs/tracker/tracker.log
log4j.appender.file.Append=true
log4j.appender.file.DatePattern='.'yyyy-MM-dd
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %c{1} [%p] %m%n
 
### stdout ###
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Threshold=INFO
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} %c{1} [%p] %m%n

　　

配置解释：flume服务器运行在10.112.28.240上，并且监听的端口为4141，在log4j中只需要将日志发送到10.112.28.240的4141端口就能成功的发送到flume上。flume会监听并收集该端口上的数据信息，然后将它转化成kafka event，并发送到kafka集群hdtest.topic.jenkin.com topic下。

3. 日志生产者

public class FlumeTest {
    private static final Logger LOGGER = Logger.getLogger(FlumeTest.class);
 
    public static void main(String[] args) throws InterruptedException {
        for (int i = 20; i < 100; i++) {
            LOGGER.info("Info [" + i + "]");
            Thread.sleep(1000);
        }
    }
}

4. kafka日志消费者

public class Consumer {
 
    public static void main(String[] args) {
        System.out.println("begin consumer");
        connectionKafka();
        System.out.println("finish consumer");
    }
 
    @SuppressWarnings("resource")
    public static void connectionKafka() {
 
        Properties props = new Properties();
        props.put("bootstrap.servers", "10.11.97.57:9092,10.11.97.58:9092,10.11.97.60:9092");
        props.put("group.id", "testConsumer");
        props.put("enable.auto.commit", "true");
        props.put("auto.commit.interval.ms", "1000");
        props.put("session.timeout.ms", "30000");
        props.put("key.deserializer", "org.apache.kafka.common.serialization.StringDeserializer");
        props.put("value.deserializer", "org.apache.kafka.common.serialization.StringDeserializer");
        KafkaConsumer<String, String> consumer = new KafkaConsumer<>(props);
        consumer.subscribe(Arrays.asList("hdtest.topic.jenkin.com"));
        while (true) {
            ConsumerRecords<String, String> records = consumer.poll(100);
            try {
                Thread.sleep(2000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            for (ConsumerRecord<String, String> record : records) {
                System.out.printf("===================offset = %d, key = %s, value = %s", record.offset(), record.key(),
                        record.value());
            }
        }
    }
}