Flume案例-聚合

1）案例需求：

Flume-1 监控文件/usr/local/flume/datas/group.log
Flume-2 监控某一个端口的数据流，Flume-1 与 Flume-2 将数据发送给 Flume-3， Flume-3 将最终数据打印到控制台。

2）需求分析：

3）实现步骤：

1.准备工作

创建/usr/local/flume/datas/group.log:

nbu@ecs:/usr/local/flume$ cd datas
nbu@ecs:/usr/local/flume/datas$ touch group.log

创建配置文件:

nbu@ecs:~$ cd /usr/local/flume/job
nbu@ecs:/usr/local/flume/job$ mkdir group3
nbu@ecs:/usr/local/flume/job$ cd group3

2.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 hadoop102 上编辑配置文件:

/usr/local/flume/job/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 /usr/local/flume/datas/group.log
a1.sources.r1.shell = /bin/bash -c
# Describe the sink
a1.sinks.k1.type = avro
a1.sinks.k1.hostname = localhost
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

3.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 hadoop103 上编辑配置文件:

/usr/local/flume/job/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 = localhost
a2.sources.r1.port = 44444
# Describe the sink
a2.sinks.k1.type = avro
a2.sinks.k1.hostname = localhost
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

4.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 上编辑配置文件:

usr/local/flume/job/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 = localhost
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

5.执行配置文件

分别开启对应配置文件： flume3-flume-logger.conf， flume2-netcat-flume.conf， flume1-logger-flume.conf。

nbu@ecs:/usr/local/flume$ bin/flume-ng agent --conf conf/ --name a1 --conf-file job/group3/flume1-logger-flume.conf
nbu@ecs:/usr/local/flume$ bin/flume-ng agent --conf conf/ --name a2 --conf-file job/group3/flume2-netcat-flume.conf
nbu@ecs:/usr/local/flume$ bin/flume-ng agent --conf conf/ --name a3 --conf-file job/group3/flume3-flume-logger.conf -Dflume.root.logger=INFO,console

6.向/usr/local/flume/datas 目录下的 group.log 追加内容:

nbu@ecs:~$ cd /usr/local/flume/datas
nbu@ecs:/usr/local/flume/datas$ echo 'hello' > group.log

检查flume3中的结果

7.向 44444 端口发送数据

nbu@ecs:/usr/local/flume/datas$ nc localhost 44444

检查flume3中的结果