flume 容错和负载均衡3

本文介绍如何使用flume-ng实现集群负载均衡和故障转移功能,通过配置不同机器的角色,如主机1作为负载均衡器,主机2和主机3作为数据接收节点,实现数据流的高效分配和故障恢复。

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集群采用3台机器:

host1 load-balance设置  host2 机器1  host3 机器2


其中,host1 机器配置:

#Define a memory channel called c1 on a1  
a1.channels = c1
a1.sources = r1
a1.sinks = k1 k2
a1.sinkgroups = g1
a1.sinkgroups.g1.sinks = k1 k2
a1.sinkgroups.g1.processor.type = load_balance
a1.sinkgroups.g1.processor.selector = round_robin
a1.sinkgroups.g1.processor.backoff = true
a1.channels.c1.type = file
a1.channels.c1.checkpointDir = /tmp/flume/loadcheckpoint
a1.channels.c1.dataDirs = /tmp/flume/loaddata
a1.sources.r1.channels = c1
a1.sources.r1.type = avro
a1.sources.r1.bind = 0.0.0.0
a1.sources.r1.port = 41415

a1.sinks.k1.channel = c1
a1.sinks.k1.type = avro
a1.sinks.k1.hostname = host2
a1.sinks.k1.port = 41414

a1.sinks.k2.channel = c1
a1.sinks.k2.type = AVRO
a1.sinks.k2.hostname = host3
a1.sinks.k2.port = 41414


host2 机器配置:

a2.channels = c1  
a2.sources = r1
a2.sinks = k1
a2.channels.c1.type = FILE
a1.channels.c1.checkpointDir = /tmp/flume/checkpoint
a1.channels.c1.dataDirs = /tmp/flume/data
a2.sources.r1.channels = c1
a2.sources.r1.type = AVRO
a2.sources.r1.bind = 0.0.0.0
a2.sources.r1.port = 41414
a2.sinks.k1.channel = c1
a2.sinks.k1.type = file_roll
a2.sinks.k1.sink.directory = /tmp/load/
a2.sinks.k1.sink.rollInterval = 0

 

host3 机器配置:

a2.channels = c1  
a2.sources = r1
a2.sinks = k1
a2.channels.c1.type = FILE
a1.channels.c1.checkpointDir = /tmp/flume/checkpoint
a1.channels.c1.dataDirs = /tmp/flume/data
a2.sources.r1.channels = c1
a2.sources.r1.type = AVRO
a2.sources.r1.bind = 0.0.0.0
a2.sources.r1.port = 41414
a2.sinks.k1.channel = c1
a2.sinks.k1.type = file_roll
a2.sinks.k1.sink.directory = /tmp/load/
a2.sinks.k1.sink.rollInterval = 0


客户端机器暂时使用flume-ng的agent发送,配置如下:

# Define a memory channel called c1 on a1  
a1.channels.c1.type = file
a1.channels.c1.checkpointDir = /tmp/flume/checkpoint
a1.channels.c1.dataDirs = /tmp/flume/data
a1.sources.r1.channels = c1
a1.sources.r1.type = exec
a1.sources.r1.command = cat /tmp/linux.log
a1.sinks.k1.type = avro
a1.sinks.k1.channel = c1
a1.sinks.k1.hostname = host1
a1.sinks.k1.port = 41415
a1.channels = c1
a1.sources = r1
a1.sinks = k1


客户端/tmp/linux.log文件3G左右,发送给host1。

 

启动:

host2:

bin/flume-ng agent -c conf -f conf/load-sink1.conf -n a2

host3:

bin/flume-ng agent -c conf -f conf/load-sink2.conf -n a2

host1:

bin/flume-ng agent -c conf -f conf/load-balance.conf -n a1

客户端:

bin/flume-ng agent -c conf -f conf/client.conf -n a1

 

注意:启动方式最好是从下往上启动。即:先启动host2和host3,然后启动host1,最后启动client。

测试过程中,可以随时将host2或host3停止,过一段时间再启动。

这样,就测试了flume-ng的load-balance和failover功能。

转载于:https://www.cnblogs.com/wjsshide/p/5032781.html

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