flume三个案例
flume 安装 及测试 netcat-logs.conf
Flume :
Flume 安装 上传包 解压
到 conf 目录下
flume.env.sh 配置 jdk 即可
vi netcat-logger.conf
定义这个 agent 中各组件的名字
a1.sources = r1
a1.sinks = k1
a1.channels = c1
描述和配置 source 组件：r1
a1.sources.r1.type = netcat
a1.sources.r1.bind = localhost
a1.sources.r1.port = 44444
描述和配置 sink 组件：k1
a1.sinks.k1.type = logger
描述和配置 channel 组件，此处使用是内存缓存的方式
a1.channels.c1.type = memory
a1.channels.c1.capacity = 1000
a1.channels.c1.transactionCapacity = 100
描述和配置 source channel sink 之间的连接关系
a1.sources.r1.channels = c1
a1.sinks.k1.channel = c1
简单测试案例：yum install telnet ;telnet localhost 44444; 输入 hello【前提 下面执行命令 已经执行】
执行命令：bin/flume-ng agent -c conf -f conf/netcat-logger.conf -n a1 -Dflume.root.logger=INFO,console
案例二：需求监控变化的目录内的文件
需求：服务器的某特定目录下，会不断产生新的文件，每当有新文件出现，
就需要把文件采集到 S HDFS 中去
Vi spooldir-hdfs.conf
文件内容：
Name the components on this agent
a1.sources = r1
a1.sinks = k1
a1.channels = c1
Describe/configure the source
##注意：不能往监控目中重复丢同名文件
a1.sources.r1.type = spooldir
a1.sources.r1.spoolDir = /root/logs
a1.sources.r1.fileHeader = true
Describe the sink
a1.sinks.k1.type = hdfs
a1.sinks.k1.hdfs.path = /flume/events/%y-%m-%d/%H%M/
a1.sinks.k1.hdfs.filePrefix = events-
a1.sinks.k1.hdfs.round = true
a1.sinks.k1.hdfs.roundValue = 10
a1.sinks.k1.hdfs.roundUnit = minute
a1.sinks.k1.hdfs.rollInterval = 3
a1.sinks.k1.hdfs.rollSize = 20
a1.sinks.k1.hdfs.rollCount = 5
a1.sinks.k1.hdfs.batchSize = 1
a1.sinks.k1.hdfs.useLocalTimeStamp = true
#生成的文件类型，默认是 Sequencefile，可用 DataStream，则为普通文本
a1.sinks.k1.hdfs.fileType = DataStream
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
Mkdir logs2
Cp a.txt logs2 【前提执行flume命令，cp 后查看结果】
执行命令：
bin/flume-ng agent -c conf -f conf/spooldir-hdfs.conf -n a1 -Dflume.root.logger=INFO,console
案例二结束
案例三 ：需求 ：监控变化的内容文件
需求:比如业务系统使用 j log4j 生成的日志，日志内容不断增加，需要把追
加到日志文件中的数据实时采集到 hdfs【简而言之：一个文件的内容在变化】
Vi tail-hdfs.conf
a1.sources = r1
a1.sinks = k1
a1.channels = c1
Describe/configure the source
a1.sources.r1.type = exec
a1.sources.r1.command = tail -F /root/logs/test.log
a1.sources.r1.channels = c1
Describe the sink
a1.sinks.k1.type = hdfs
a1.sinks.k1.hdfs.path = /flume/tailout/%y-%m-%d/%H%M/
a1.sinks.k1.hdfs.filePrefix = events-
a1.sinks.k1.hdfs.round = true
a1.sinks.k1.hdfs.roundValue = 10
a1.sinks.k1.hdfs.roundUnit = minute
a1.sinks.k1.hdfs.rollInterval = 3
a1.sinks.k1.hdfs.rollSize = 20
a1.sinks.k1.hdfs.rollCount = 5
a1.sinks.k1.hdfs.batchSize = 1
a1.sinks.k1.hdfs.useLocalTimeStamp = true
#生成的文件类型，默认是 Sequencefile，可用 DataStream，则为普通文本
a1.sinks.k1.hdfs.fileType = DataStream
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
执行命令：while true ; do echo date >>test.log ;sleep 1;done 持续向test.log文件中添加date字符串
或者：while true ; do date >>test.log ;sleep 1;done 持续添加系统时间
案例三结束