Flume架構(gòu)及使用例子
Flume架構(gòu)及核心組件
（1）Source 收集 負責從什么地方采集數(shù)據(jù)
（2）Channel 記錄
（3）Sink 輸出官方文檔
http://flume.apache.org/FlumeUserGuide.html
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http://flume.apache.org/FlumeUserGuide.html#starting-an-agent
Flume使用思路
使用flume的關(guān)鍵就是寫配置文件
（1）配置Source
（2）配置Channerl
（3）配置Sink
（4）把以上三個組件串起來
樣例
樣例1：從指定網(wǎng)絡(luò)端口采集數(shù)據(jù)輸出到控制臺
代碼實現(xiàn)：
# 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啟動agent
http://flume.apache.org/FlumeUserGuide.html#starting-an-agent
$ bin/flume-ng agent -n $agent_name -c conf -f conf/flume-conf.properties.template -Dflume.root.logger=INFO,console-n 和-name同樣含義，為agent名稱
-c 和-conf同樣含義，為指定一個配置文件
-Dflume.root.logger=INFO,console 在控制臺輸出執(zhí)行信息
使用telnet進行測試
telnet localhost 44444輸出結(jié)果分析
Event：{headers:{} body: 68 65 6c 6c 6f 0d hello}Event是Flume數(shù)據(jù)傳輸?shù)幕締卧?/p>
Event = 可選的header + byte array
樣例2:監(jiān)控一個文件實時采集新增的數(shù)據(jù)輸出到控制臺
Agent選型
exec source + memory channel + logger sink
Exec Source文檔地址
http://flume.apache.org/FlumeUserGuide.html#exec-source
代碼實現(xiàn)
# 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 /var/log/test.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
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樣例3:將A端服務(wù)器日志實時采集到B端服務(wù)器
技術(shù)選型
exec source + memory channel + avro sink
avro source + memory channel + logger sink代碼實現(xiàn)
A端服務(wù)器
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-channelB端服務(wù)器
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本文標題：Flume架構(gòu)及使用例子
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