apache flume hdfs是否可以接受动态路径写入?

时间:2013-02-12 10:17:08

标签: apache hadoop hdfs flume

我是apache flume的新手 我试图看看如何获​​得一个json(作为http源),解析它并根据内容将其存储在hdfs上的动态路径中。
例如:
如果json是:

[{   
  "field1" : "value1",
  "field2" : "value2"
}]

然后hdfs路径将是:
 /一些默认的根路径/值1 /值2 /一些价值名文件
是否有这样的水槽配置使我能够做到这一点?

这是我当前的配置(通过http接受json,并根据时间戳将其存储在路径中):

#flume.conf: http source, hdfs sink

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

# Describe/configure the source
a1.sources.r1.type =  org.apache.flume.source.http.HTTPSource
a1.sources.r1.port = 9000
#a1.sources.r1.handler = org.apache.flume.http.JSONHandler

# Describe the sink
a1.sinks.k1.type = hdfs
a1.sinks.k1.hdfs.path = /user/uri/events/%y-%m-%d/%H%M/%S
a1.sinks.k1.hdfs.filePrefix = events-
a1.sinks.k1.hdfs.round = true
a1.sinks.k1.hdfs.roundValue = 10
a1.sinks.k1.hdfs.roundUnit = minute

# 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

谢谢!

1 个答案:

答案 0 :(得分:8)

解决方案在水槽中documentation for the hdfs sink

以下是修订后的配置:

#flume.conf: http source, hdfs sink

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

# Describe/configure the source
a1.sources.r1.type =  org.apache.flume.source.http.HTTPSource
a1.sources.r1.port = 9000
#a1.sources.r1.handler = org.apache.flume.http.JSONHandler

# Describe the sink
a1.sinks.k1.type = hdfs
a1.sinks.k1.hdfs.path = /user/uri/events/%{field1}
a1.sinks.k1.hdfs.filePrefix = events-
a1.sinks.k1.hdfs.round = true
a1.sinks.k1.hdfs.roundValue = 10
a1.sinks.k1.hdfs.roundUnit = minute

# 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  

和卷曲:

curl -X POST -d '[{  "headers" : {           "timestamp" : "434324343", "host" :"random_host.example.com", "field1" : "val1"            },  "body" : "random_body"  }]' localhost:9000