Flume容错机制

Flume容错机制描述
当集群中有多台Flume机器在工作的时候，就要考虑集群中随时有机器宕机的情况，当有机器宕机，如何保证数据不丢失，下面我来介绍一下Flume的容错机制。就是建立Flume备胎，创建Standby节点，虽然可以解决单节点故障问题，但是集群的资源也会浪费，因为有一个是等待的，占用资源不干活，下面来看看架构图：

Agent1配置文件：

#agent1 name
agent1.channels = c1
agent1.sources = r1
agent1.sinks = k1 k2

#set gruop
agent1.sinkgroups = g1

#set channel
agent1.channels.c1.type = memory
agent1.channels.c1.capacity = 1000
agent1.channels.c1.transactionCapacity = 100

agent1.sources.r1.channels = c1
agent1.sources.r1.type = exec
agent1.sources.r1.command = tail -F /root/logs/nginx.log

# set sink1
agent1.sinks.k1.channel = c1
agent1.sinks.k1.type = avro
agent1.sinks.k1.hostname = node02
agent1.sinks.k1.port = 52020

# set sink2
agent1.sinks.k2.channel = c1
agent1.sinks.k2.type = avro
agent1.sinks.k2.hostname = node03
agent1.sinks.k2.port = 52020

#set sink group
agent1.sinkgroups.g1.sinks = k1 k2

#set failover
agent1.sinkgroups.g1.processor.type = failover
# 设置优先级，数值越大优先级越高
agent1.sinkgroups.g1.processor.priority.k1 = 1
agent1.sinkgroups.g1.processor.priority.k2 = 10
# sink失败的最大回退期
agent1.sinkgroups.g1.processor.maxpenalty = 10000

Agent2和Agnet3配置文件：

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

# Describe/configure the source
a1.sources.r1.type = avro
a1.sources.r1.channels = c1
a1.sources.r1.bind = node02
a1.sources.r1.port = 44444

# Describe the sink
a1.sinks.k1.type = logger

# 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
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最后

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