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htrace-flume
============
htrace-flume provides the span receiver which sends tracing spans to Flume collector.
Tutorial
--------
1) build and deploy
$ cd htrace/htrace-flume
$ mvn compile assembly:single
$ cp target/htrace-flume-*-jar-with-dependencies.jar $HADOOP_HOME/share/hadoop/hdfs/lib/
2) Edit hdfs-site.xml to include the following:
<property>
<name>hadoop.trace.spanreceiver.classes</name>
<value>org.htrace.impl.FlumeSpanReceiver</value>
</property>
<property>
<name>hadoop.htrace.flume.hostname</name>
<value>127.0.0.1</value>
</property>
<property>
<name>hadoop.htrace.flume.port</name>
<value>60000</value>
</property>
3) Setup flume collector
Create flume-conf.properties file. Below is a sample that sets up an hdfs sink.
agent.sources = avro-collection-source
agent.channels = memoryChannel
agent.sinks = loggerSink hdfs-sink
# avro source - should match the configurations in hdfs-site.xml
agent.sources.avro-collection-source.type = avro
agent.sources.avro-collection-source.bind = 127.0.0.1
agent.sources.avro-collection-source.port = 60000
agent.sources.avro-collection-source.channels = memoryChannel
#sample hdfs-sink, change to any sink that flume supports
agent.sinks.hdfs-sink.type = hdfs
agent.sinks.hdfs-sink.hdfs.path = hdfs://127.0.0.1:9000/flume
agent.sinks.hdfs-sink.channel = memoryChannel
agent.sinks.hdfs-sink.hdfs.fileType = DataStream
agent.sinks.hdfs-sink.hdfs.writeFormat = Text
agent.sinks.hdfs-sink.hdfs.rollSize = 0
agent.sinks.hdfs-sink.hdfs.rollCount = 10000
agent.sinks.hdfs-sink.hdfs.batchSize = 100
# memory channel
agent.channels.memoryChannel.capacity = 10000
agent.channels.memoryChannel.transactionCapacity = 1000
Run flume agent using command "flume-ng agent -c ./conf/ -f ./conf/flume-conf.properties -n agent"