故障转移

使用agent1 监控一个端口，其 sink 组中的 sink 分别对接agent2和 agent3，采用FailoverSinkProcessor，实现故障转移的功能。

配置三个agent文件

agent1.conf

# Name the components on this agent
a1.sources = r1
a1.channels = c1
a1.sinkgroups = g1
a1.sinks = k1 k2

# Describe/configure the source
a1.sources.r1.type = netcat
a1.sources.r1.bind = localhost
a1.sources.r1.port = 44444

a1.sinkgroups.g1.processor.type = failover
a1.sinkgroups.g1.processor.priority.k1 = 10
a1.sinkgroups.g1.processor.priority.k2 = 5
a1.sinkgroups.g1.processor.maxpenalty = 10000

# Describe the sink
a1.sinks.k1.type = avro
a1.sinks.k1.hostname = b02master
a1.sinks.k1.port = 520

a1.sinks.k2.type = avro
a1.sinks.k2.hostname = b02master
a1.sinks.k2.port = 521

# Describe the channel
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.sinkgroups.g1.sinks = k1 k2
a1.sinks.k1.channel = c1
a1.sinks.k2.channel = c1

agent2.conf

# Name the components on this agent
a2.sources = r1
a2.sinks = k1
a2.channels = c1

# Describe/configure the source
a2.sources.r1.type = avro
a2.sources.r1.bind = b02master
a2.sources.r1.port = 520

# Describe the sink
a2.sinks.k1.type = logger

# Describe the channel
a2.channels.c1.type = memory
a2.channels.c1.capacity = 1000
a2.channels.c1.transactionCapacity = 100

# Bind the source and sink to the channel
a2.sources.r1.channels = c1
a2.sinks.k1.channel = c1

agent3.conf

# Name the components on this agent
a3.sources = r1
a3.sinks = k1
a3.channels = c2

# Describe/configure the source
a3.sources.r1.type = avro
a3.sources.r1.bind = b02master
a3.sources.r1.port = 521

# Describe the sink
a3.sinks.k1.type = logger

# Describe the channel
a3.channels.c2.type = memory
a3.channels.c2.capacity = 1000
a3.channels.c2.transactionCapacity = 100

# Bind the source and sink to the channel
a3.sources.r1.channels = c2
a3.sinks.k1.channel = c2

执行语句

bin/flume-ng agent -c conf -f conf/group2/agent1.conf -n a1 -Dflume.root.logger=INFO,console
bin/flume-ng agent -c conf -f conf/group2/agent2.conf -n a2 -Dflume.root.logger=INFO,console
bin/flume-ng agent -c conf -f conf/group2/agent3.conf -n a3 -Dflume.root.logger=INFO,console

1. 然后再新的窗口上运行 ：nc master 1314
2. 在此从窗口上输入数据 应在agent2 上进行存储 显示
3. 当我们停止agent2进程后
4. 再次输入不同的数据 我们会发现 agent3 上会进行存储显示
5. 以此首先故障转移

使用 jps -ml 查看 Flume 进程。然后kill掉agent2。