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本篇內(nèi)容介紹了“Flume的Source怎么實現(xiàn)采集數(shù)據(jù)到通過內(nèi)存輸出到控制臺”的有關(guān)知識,在實際案例的操作過程中,不少人都會遇到這樣的困境,接下來就讓小編帶領(lǐng)大家學(xué)習(xí)一下如何處理這些情況吧!希望大家仔細閱讀,能夠?qū)W有所成!
需求:
Flume的Source從NetCat 和 Exec上采集數(shù)據(jù)到通過內(nèi)存輸出到控制臺
這里memory也可以是file聚合,checkpointDir記錄偏移量
# Use a channel which buffers events in memory agent1.channels.channel1.type = file agent1.channels.channel1.checkpointDir=/var/checkpoint agent1.channels.channel1.dataDirs=/var/tmp agent1.channels.channel1.capacity = 1000 agent1.channels.channel1.transactionCapactiy = 100
這里采取memory配置文件:
a1.sources = r1 r2 a1.sinks = k1 a1.channels = c1 a1.sources.r1.channels = c1 a1.sources.r1.type = netcat a1.sources.r1.bind = 0.0.0.0 a1.sources.r1.port = 44444 a1.sources.r2.channels = c1 a1.sources.r2.type = exec a1.sources.r2.command = tail -F /home/hadoop/data/data.log # 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.sources.r2.channels = c1 a1.sinks.k1.channel = c1
測試結(jié)果:
[hadoop@hadoop001 ~]$ telnet localhost 44444 Trying ::1... Connected to localhost. Escape character is '^]'. ZOURC123456789 OK [hadoop@hadoop001 data]$ echo 123 >> data.log [hadoop@hadoop001 data]$
控制臺輸出結(jié)果:
2018-08-10 20:12:10,426 (SinkRunner-PollingRunner-DefaultSinkProcessor) [INFO - org.apache.flume.sink.LoggerSink.process(LoggerSink.java:94)] Event: { headers:{} body: 31 32 33 123 } 2018-08-10 20:12:32,439 (SinkRunner-PollingRunner-DefaultSinkProcessor) [INFO - org.apache.flume.sink.LoggerSink.process(LoggerSink.java:94)] Event: { headers:{} body: 5A 4F 55 52 43 31 32 33 34 35 36 37 38 39 0D ZOURC123456789. }
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