标签:成功 event 负载 随机 command tar host export max
负载均衡是用于解决一台机器(一个进程)无法解决所有请求而产生的一种算法。
Load balancing Sink Processor 能够实现 load balance 功能,如下图Agent1 是一个路由节点,负责将 Channel 暂存的 Event 均衡到对应的多个 Sink组件上,而每个 Sink 组件分别连接到一个独立的 Agent 上
轮询 (round_robin) 随机(random) 权重
Agent1
cd /export/servers/flume/conf
vi exec-avro.conf
#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 = node-2 agent1.sinks.k1.port = 52020 # set sink2 agent1.sinks.k2.channel = c1 agent1.sinks.k2.type = avro agent1.sinks.k2.hostname = node-3 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 #如果开启,则将失败的 sink 放入黑名单 agent1.sinkgroups.g1.processor.selector = round_robin #轮询 agent1.sinkgroups.g1.processor.selector.maxTimeOut=10000 #在黑名单放置的超时时间,超时结束时,若仍然无法接收,则超时时间呈指数增长
Agent2
cd /export/servers/flume/conf
vi avro-logger.conf
# 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 = node-2 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
剩下的Agent除了主机ip地址不同其他配置相同
Agent2-AgentN启动命令
涉及flume多级启动的时候 建议优先启动远离数据源的
bin/flume-ng agent -c conf -f conf/avro-logger.conf -n a1 -Dflume.root.logger=INFO,console
Agent1启动命令
bin/flume-ng agent -c conf -f conf/exec-avro.conf -n agent1 -Dflume.root.logger=INFO,console
编写脚本到/root/logs/123.log进行测试
while true;do date >> /root/logs/123.log;sleep 0.5;done
Failover Sink Processor 能够实现 failover 功能,具体流程类似 load-balance,但是内部处理机制与 load balance 完全不同。
Failover Sink Processor 维护一个优先级 Sink 组件列表,只要有一个 Sink组件可用,Event 就被传递到下一个组件。故障转移机制的作用是将失败的 Sink降级到一个池,在这些池中它们被分配一个冷却时间,随着故障的连续,在重试之前冷却时间增加。一旦 Sink 成功发送一个事件,它将恢复到活动池。 Sink 具有与之相关的优先级,数量越大,优先级越高。
例如,具有优先级为 100 的 sink 在优先级为 80 的 Sink 之前被激活。如果在发送事件时汇聚失败,则接下来将尝试下一个具有最高优先级的 Sink 发送事件。如果没有指定优先级,则根据在配置中指定 Sink 的顺序来确定优先级。
用于解决容错的方案最常见的就是HA(高可用)
同一时间 只能有一个去干活
该配置和负载均衡除了exec-avro.conf不同,其他相同
修改Agent1的exec-avro.conf
#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/456.log # set sink1 agent1.sinks.k1.channel = c1 agent1.sinks.k1.type = avro agent1.sinks.k1.hostname = node-2 agent1.sinks.k1.port = 52020 # set sink2 agent1.sinks.k2.channel = c1 agent1.sinks.k2.type = avro agent1.sinks.k2.hostname = node-3 agent1.sinks.k2.port = 52020 #set sink group agent1.sinkgroups.g1.sinks = k1 k2 #set failover agent1.sinkgroups.g1.processor.type = failover agent1.sinkgroups.g1.processor.priority.k1 = 10 agent1.sinkgroups.g1.processor.priority.k2 = 1 agent1.sinkgroups.g1.processor.maxpenalty = 10000
Agent2-AgentN启动命令
涉及flume多级启动的时候 建议优先启动远离数据源的
bin/flume-ng agent -c conf -f conf/avro-logger.conf -n a1 -Dflume.root.logger=INFO,console
Agent1启动命令
bin/flume-ng agent -c conf -f conf/exec-avro.conf -n agent1 -Dflume.root.logger=INFO,console
编写脚本到/root/logs/456.log进行测试
while true;do date >> /root/logs/456.log;sleep 0.5;done
标签:成功 event 负载 随机 command tar host export max
原文地址:https://www.cnblogs.com/jifengblog/p/9277950.html