3.6 多数据源汇总案例
多Source汇总数据到单Flume如图7-4所示。

image.png
1） 案例需求：
hadoop103上的Flume-1监控文件/opt/module/group.log，
hadoop102上的Flume-2监控某一个端口的数据流，
Flume-1与Flume-2将数据发送给hadoop104上的Flume-3，Flume-3将最终数据打印到控制台。
2）需求分析：
image.png
3）实现步骤：
0．准备工作
分发Flume
[atguigu@hadoop102 module] mkdir group3
[atguigu@hadoop103 job] mkdir group3
1．创建flume1-logger-flume.conf
配置Source用于监控hive.log文件，配置Sink输出数据到下一级Flume。
在hadoop103上创建配置文件并打开
[atguigu@hadoop103 group3] vim flume1-logger-flume.conf
添加如下内容

Name the components on this agent

a1.sources = r1
a1.sinks = k1
a1.channels = c1

Describe/configure the source

a1.sources.r1.type = exec
a1.sources.r1.command = tail -F /opt/module/group.log
a1.sources.r1.shell = /bin/bash -c

Describe the sink

a1.sinks.k1.type = avro
a1.sinks.k1.hostname = hadoop104
a1.sinks.k1.port = 4141

Describe the channel

a1.channels.c1.type = memory
a1.channels.c1.capacity = 1000
a1.channels.c1.transactionCapacity = 100

Bind the source and sink to the channel

a1.sources.r1.channels = c1
a1.sinks.k1.channel = c1
2．创建flume2-netcat-flume.conf
配置Source监控端口44444数据流，配置Sink数据到下一级Flume：
在hadoop102上创建配置文件并打开
[atguigu@hadoop102 group3] vim flume2-netcat-flume.conf
添加如下内容

Name the components on this agent

a2.sources = r1
a2.sinks = k1
a2.channels = c1

Describe/configure the source

a2.sources.r1.type = netcat
a2.sources.r1.bind = hadoop102
a2.sources.r1.port = 44444

Describe the sink

a2.sinks.k1.type = avro
a2.sinks.k1.hostname = hadoop104
a2.sinks.k1.port = 4141

Use a channel which buffers events in memory

a2.channels.c1.type = memory
a2.channels.c1.capacity = 1000
a2.channels.c1.transactionCapacity = 100

Bind the source and sink to the channel

a2.sources.r1.channels = c1
a2.sinks.k1.channel = c1
3．创建flume3-flume-logger.conf
配置source用于接收flume1与flume2发送过来的数据流，最终合并后sink到控制台。
在hadoop104上创建配置文件并打开
[atguigu@hadoop104 group3] vim flume3-flume-logger.conf
添加如下内容

Name the components on this agent

a3.sources = r1
a3.sinks = k1
a3.channels = c1

Describe/configure the source

a3.sources.r1.type = avro
a3.sources.r1.bind = hadoop104
a3.sources.r1.port = 4141

Describe the sink

Describe the sink

a3.sinks.k1.type = logger

Describe the channel

a3.channels.c1.type = memory
a3.channels.c1.capacity = 1000
a3.channels.c1.transactionCapacity = 100

Bind the source and sink to the channel

a3.sources.r1.channels = c1
a3.sinks.k1.channel = c1

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