概述

Flume官网配置文档

使用Flume的关键就是写配置文件
A） 配置Source
B） 配置Channel
C） 配置Sink
D） 把以上三个组件串起来

配置文件解析

a1: agent名称
r1: source的名称
k1: sink的名称
c1: channel的名称

# example.conf: A single-node Flume configuration

# Name the components on this agent
a1.sources = r1
a1.sinks = k1
a1.channels = c1

# Describe/configure the source
a1.sources.r1.type = netcat
a1.sources.r1.bind = localhost
a1.sources.r1.port = 44444

# Describe the sink
a1.sinks.k1.type = logger

# Use a channel which buffers events in memory
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

启动agent

flume-ng agent \
--name a1  \
--conf $FLUME_HOME/conf  \
--conf-file $FLUME_HOME/conf/example.conf \
-Dflume.root.logger=INFO,console

实战一

需求：从指定网络端口采集数据输出到控制台

配置文件

example.conf 在conf文件夹下

# Name the components on this agent
a1.sources = r1
a1.sinks = k1
a1.channels = c1

# Describe/configure the source
a1.sources.r1.type = netcat
a1.sources.r1.bind = hadoop000
a1.sources.r1.port = 44444

# Describe the sink
a1.sinks.k1.type = logger

# Use a channel which buffers events in memory
a1.channels.c1.type = memory

# Bind the source and sink to the channel
a1.sources.r1.channels = c1
a1.sinks.k1.channel = c1

启动agent

flume-ng agent \
--name a1  \
--conf $FLUME_HOME/conf  \
--conf-file $FLUME_HOME/conf/example.conf \
-Dflume.root.logger=INFO,console

测试

telnet hadoop000 44444

hello
hadoop

实战二

需求：监控一个文件实时采集新增的数据到控制台
Agent选型：Source(exec) + Channel(memory) + sink(logger)

配置文件

# 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 /home/hadoop/data/data.log
a1.sources.r1.shell = /bin/sh -c

# Describe the sink
a1.sinks.k1.type = logger

# Use a channel which buffers events in memory
a1.channels.c1.type = memory

# Bind the source and sink to the channel
a1.sources.r1.channels = c1
a1.sinks.k1.channel = c1

启动agent

flume-ng agent \
--name a1  \
--conf $FLUME_HOME/conf  \
--conf-file $FLUME_HOME/conf/exec-memory-logger.conf \
-Dflume.root.logger=INFO,console

实战三

需求：将A服务器上的日志实时采集到B服务器上

结构

Agent选型：

1. Source(exec) + Channel(memory) + sink(avro)
2. Source(avro) + Channel(memory) + sink(logger)

配置文件

配置文件1： exec-memory-avro.conf

exec-memory-avro.sources = exec-source
exec-memory-avro.sinks = avro-sink
exec-memory-avro.channels = memory-channel

exec-memory-avro.sources.exec-source.type = exec
exec-memory-avro.sources.exec-source.command = tail -F /home/hadoop/data/data.log
exec-memory-avro.sources.exec-source.shell = /bin/sh -c

exec-memory-avro.sinks.avro-sink.type = avro
exec-memory-avro.sinks.avro-sink.hostname = hadoop000
exec-memory-avro.sinks.avro-sink.port = 44444

exec-memory-avro.channels.memory-channel.type = memory

exec-memory-avro.sources.exec-source.channels = memory-channel
exec-memory-avro.sinks.avro-sink.channel = memory-channel

配置文件2：avro-memory-logger.conf

avro-memory-logger.sources = avro-source
avro-memory-logger.sinks = logger-sink
avro-memory-logger.channels = memory-channel

avro-memory-logger.sources.avro-source.type = avro
avro-memory-logger.sources.avro-source.bind = hadoop000
avro-memory-logger.sources.avro-source.port = 44444

avro-memory-logger.sinks.logger-sink.type = logger

avro-memory-logger.channels.memory-channel.type = memory

avro-memory-logger.sources.avro-source.channels = memory-channel
avro-memory-logger.sinks.logger-sink.channel = memory-channel

启动Agent

先启动avro-memory-logger

flume-ng agent \
--name avro-memory-logger  \
--conf $FLUME_HOME/conf  \
--conf-file $FLUME_HOME/conf/avro-memory-logger.conf \
-Dflume.root.logger=INFO,console

flume-ng agent \
--name exec-memory-avro  \
--conf $FLUME_HOME/conf  \
--conf-file $FLUME_HOME/conf/exec-memory-avro.conf \
-Dflume.root.logger=INFO,console

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References

1. Flume 官网
2. Spark Streaming实时流处理项目实战