• 教你一步搭建Flume分布式日志系统


      在前篇几十条业务线日志系统如何收集处理?中已经介绍了Flume的众多应用场景,那此篇中先介绍如何搭建单机版日志系统。

    环境

      CentOS7.0

          Java1.8

    下载

      官网下载 http://flume.apache.org/download.html

      当前最新版  apache-flume-1.7.0-bin.tar.gz

      下载后上传到CentOS中的/usr/local/ 文件夹中,并解压到当前文件中重命名为flume170    /usr/local/flume170

    tar -zxvf apache-flume-1.7.0-bin.tar.gz

    安装配置

      修改 flume-env.sh 配置文件,主要是添加JAVA_HOME变量设置

    JAVA_HOME=/usr/lib/jvm/java8

      设置Flume的全局变量 

      打开profile

    vi /etc/profile

      添加

    export FLUME=/usr/local/flume170
    export PATH=$PATH:$FLUME/bin

      然后使环境变量生效

    source /etc/profile

    验证是否安装成功

    flume-ng version

    测试小实例

     参考网上Spool类型的示例

        Spool监测配置的目录下新增的文件,并将文件中的数据读取出来。需要注意两点: 
        1) 拷贝到spool目录下的文件不可以再打开编辑。 
        2) spool目录下不可包含相应的子目录 
        创建agent配置文件

    复制代码
    # vi /usr/local/flume170/conf/spool.conf
    a1.sources = r1
    a1.channels = c1
    a1.sinks = k1
    
    # Describe/configure the source
    a1.sources.r1.type = spooldir
    a1.sources.r1.channels = c1
    a1.sources.r1.spoolDir =/usr/local/flume170/logs
    a1.sources.r1.fileHeader = true
    
    # Use a channel which buffers events in memory
    a1.channels.c1.type = memory
    a1.channels.c1.capacity = 1000
    a1.channels.c1.transactionCapacity = 100
    
    # Describe the sink
    a1.sinks.k1.type = logger
    a1.sinks.k1.channel = c1
    复制代码

      spoolDir:设置监控的文件夹,当有文件进入时会读取文件的内容再通过sink发送,发送完成后会在文件名后加上.complete

      启动flume agent a1

    /usr/local/flume170/bin/flume-ng agent -c . -f /usr/local/flume170/conf/spool.conf -n a1 -Dflume.root.logger=INFO,console

      追加一个文件到/usr/local/flume170/logs目录

    # echo "spool test1" > /usr/local/flume170/logs/spool_text.log

      在控制台,可以看到以下相关信息:

    14/08/10 11:37:13 INFO source.SpoolDirectorySource: Spooling Directory Source runner has shutdown.
    14/08/10 11:37:13 INFO source.SpoolDirectorySource: Spooling Directory Source runner has shutdown.
    14/08/10 11:37:14 INFO avro.ReliableSpoolingFileEventReader: Preparing to move file /usr/local/flume170/logs/spool_text.log to/usr/local/flume170/logs/spool_text.log.COMPLETED 14/08/10 11:37:14 INFO source.SpoolDirectorySource: Spooling Directory Source runner has shutdown. 14/08/10 11:37:14 INFO source.SpoolDirectorySource: Spooling Directory Source runner has shutdown. 14/08/10 11:37:14 INFO sink.LoggerSink: Event: { headers:{file=/usr/local/flume170/logs/spool_text.log} body: 73 70 6F 6F 6C 20 74 65 73 74 31 spool test1 } 14/08/10 11:37:15 INFO source.SpoolDirectorySource: Spooling Directory Source runner has shutdown. 14/08/10 11:37:15 INFO source.SpoolDirectorySource: Spooling Directory Source runner has shutdown. 14/08/10 11:37:16 INFO source.SpoolDirectorySource: Spooling Directory Source runner has shutdown. 14/08/10 11:37:16 INFO source.SpoolDirectorySource: Spooling Directory Source runner has shutdown. 14/08/10 11:37:17 INFO source.SpoolDirectorySource: Spooling Directory Source runner has shutdown.

       出现上面的内容就表明已经可以运行了,整个安装过程很简单,主要是配置。

       至于分布式的需要设置source和sink。

     

      如上图,将每个业务中的Flume产生的日志再用一个Flume来接收汇总,然后将汇总后的日志统一发送给KafKa作统一处理,最后保存到HDFS或HBase中。上图中,每个业务中的Flume可以做负载和主备,由此可以看出有很强的扩展性。

    作者:欢醉
    公众号【一个码农的日常】
    出处:http://zhangs1986.cnblogs.com/
    码云:https://gitee.com/huanzui
    本文版权归作者和博客园共有,欢迎转载,但未经作者同意必须保留此段声明,且在文章页面明显位置给出原文连接,否则保留追究法律责任的权利。

     
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  • 原文地址:https://www.cnblogs.com/javalinux/p/14930616.html
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