Flume負載均衡串聯

負載均衡是用于解決一台機器（一個程序）無法解決所有請求而産生的一種算法。

• 同一個請求隻能交給一個進行處理，避免資料重複。
• 如何配置設定請求就涉及到了負載均衡算法：輪詢（round_robin）、随機（random）、權重
• flume串聯跨網絡傳輸資料
  • avro sink （avro是一種協定）

  • avro source

    使用上述兩個元件指定綁定的端口ip就可以滿足資料跨網絡的傳遞，通常用于flume串聯架構中。

• flume串聯啟動時，通常從遠離資料端開始啟動。

配置檔案如下：

agent1：

#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/123.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 = load_balance
agent1.sinkgroups.g1.processor.backoff = true
agent1.sinkgroups.g1.processor.selector = round_robin
agent1.sinkgroups.g1.processor.selector.maxTimeOut=10000
           

對于agent2

# 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   #綁定本機的ip
a1.sources.r1.port = 52020

# 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
           

對于agent3

# 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 = node03  #綁定本機的ip
a1.sources.r1.port = 52020

# 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
           

這裡假設agent4為壞了，現在隻有三台。

啟動：

node03、node02執行：

bin/flume-ng agent -c conf -f conf/avro-logger.conf -n a1 -Dflume.root.logger=INFO,console
           

node01執行

bin/flume-ng agent -c conf -f conf/exec-avro.conf -n agent1 -Dflume.root.logger=INFO,console
           

在第一台node01上使用shell指令模拟：