06_Flume_interceptor_时间戳+Host

1、目标场景

 

2、flume agent配置文件

# 01 define agent name, source/sink/channel name
a1.sources = r1
a1.sinks = k1
a1.channels = c1

# 02 source,http,jsonhandler
a1.sources.r1.type = http
a1.sources.r1.bind = master
a1.sources.r1.port = 6666
a1.sources.r1.handler = org.apache.flume.source.http.JSONHandler

# 03 timestamp and host interceptors work before source
a1.sources.r1.interceptors = i1 i2       # 两个interceptor串联,依次作用于event
a1.sources.r1.interceptors.i1.type = timestamp 
a1.sources.r1.interceptors.i1.preserveExisting = false  
 
a1.sources.r1.interceptors.i2.type = host  
# flume event的头部将添加 “hostname”:实际主机名
a1.sources.r1.interceptors.i2.hostHeader = hostname  # 指定key,value将填充为flume agent所在节点的主机名
a1.sources.r1.interceptors.i2.useIP = false          # IP和主机名,二选一即可

# 04 hdfs sink
a1.sinks.k1.type = hdfs  
a1.sinks.k1.hdfs.path = hdfs://master:9000/flume/%Y-%m-%d/   # hdfs sink将根据event header中的时间戳进行替换
# 和hostHeader的值保持一致,hdfs sink将提取event中key为hostnmae的值,基于该值创建文件名前缀
a1.sinks.k1.hdfs.filePrefix = %{hostname}   # hdfs sink将根据event header中的hostnmae对应的value进行替换
a1.sinks.k1.hdfs.fileType = DataStream
a1.sinks.k1.hdfs.writeFormat = Text
a1.sinks.k1.hdfs.rollInterval = 0
a1.sinks.k1.hdfs.rollCount = 10
a1.sinks.k1.hdfs.rollSize = 1024000


# channel,memory
a1.channels.c1.type = memory
a1.channels.c1.capacity = 1000
a1.channels.c1.transactionCapacity = 100

# bind source,sink to channel 
a1.sinks.k1.channel = c1
a1.sources.r1.channels = c1

 

 

3、验证timestamp+host interceptor

验证思路:

1)先将interceptor作用后的event,通过logger sink打印到console,验证header是否正常添加
2)修改sink为hdfs, 观察目录和文件的名称是否能够按照预期创建(时间戳-目录,hostname-文件前缀)

 

验证过程:

1)发送header为空的http请求,logger sink打印event到终端,观察event header中是否被添加了timestamp以及hostname

2)ogger打印到console的event,header发生了变化

3)修改sink为hdfs, 观察HDFS的目录名(时间戳)和文件前缀(hostnme)

*目录名被正常替换(基于event header中的时间戳)

*文件前缀被正常替换(基于event header中的hostname:实际主机名)

* 文件内容被写入为event的body

 

posted @ 2017-12-03 12:37  shayzhang  阅读(1239)  评论(0编辑  收藏  举报