flume入门级

flume

一、下载

[pxj@pxj /opt]$sudo wget http://archive.cloudera.com/cdh5/cdh/5/flume-ng-1.6.0-cdh5.16.2.tar.gz


[sudo] pxj 的密码：
--2020-02-13 01:21:32--  http://archive.cloudera.com/cdh5/cdh/5/flume-ng-1.6.0-cdh5.16.2.tar.gz
正在解析主机 archive.cloudera.com (archive.cloudera.com)... 151.101.228.167
正在连接 archive.cloudera.com (archive.cloudera.com)|151.101.228.167|:80... 已连接。
已发出 HTTP 请求，正在等待回应... 200 OK
长度：81326682 (78M) [binary/octet-stream]
正在保存至: “flume-ng-1.6.0-cdh5.16.2.tar.gz”
解压

[pxj@pxj /opt]$tar -zxvf flume-ng-1.6.0-cdh5.16.2.tar.gz -C ~/app
修改配置文件

[pxj@pxj /home/pxj/app/apache-flume-1.6.0-cdh5.16.2-bin/conf]$vim flume-env.sh
[pxj@pxj /home/pxj/app/apache-flume-1.6.0-cdh5.16.2-bin/conf]$cp flume-env.sh.template flume-env.sh
export JAVA_HOME=/usr/java/jdk1.8.0_121
配置环境变量

export FLUME_HOME=/home/pxj/app/apache-flume-1.6.0-cdh5.16.2-bin
export PATH=$FLUME_HOME/bin:$PATH

二、flume简介

数据采集
RDBMS：Sqoop
日志 ==> Hadoop/HDFS

hadoop fs -put … …
crontab

ng: 1h 一个文件夹 put 一个小时跑一次
监控

Flume：large amounts of log data
collecting,
aggregating,
moving

ng ==> Flume ==> HDFS

Flume就是一个针对日志数据进行采集和汇总的一个框架
把日志从A地方搬迁到B地方

Agent：是一个Flume
Source
Channel
Sink

Flume
OG 0.9
NG 1.x

Logstash ELK
Flume Hadoop
Kafka MQ

Flume
真正要开发的代码真的不多了
如何基于Flume进行自定义开发
Source
Sink
Intercepter
Flume从使用层面来讲就是写配置文件，其实就是配置我们的Agent

Source、Channel、Sink的配置 ***** 但是不用记，知道去哪里查就行

三、flume的组件

Source 从哪收集
avro 序列化
exec 命令行
spooling 目录
taildir *****
kafka

Channel：数据存哪里
memory
kafka
file

Sink：数据输出到哪里
hdfs Hadoop
logger 控制台
avro
kafka

Agent： Source Channel Sink ==> JVM

四、应用实例

1.netcat

example.conf <== flume配置文件的文件名
44444端口的输入数据通过flume采集，然后在控制台上打印出来
example.conf <== flume配置文件的文件名
44444端口的输入数据通过flume采集，然后在控制台上打印出来
a1 <== agent的名字

# Name the components on this agent
a1.sources = r1  <== source的名字  
a1.sinks = k1    <== sink的名字
a1.channels = c1  <==  channel的名字
# Describe/configure the source   <== 定义source
a1.sources.r1.type = netcat
a1.sources.r1.bind = 0.0.0.0
a1.sources.r1.port = 44444
# Use a channel which buffers events in memory <== 定义channel
a1.channels.c1.type = memory
# Describe the sink  <== 定义sink
a1.sinks.k1.type = logger
# Bind the source and sink to the channel
a1.sources.r1.channels = c1  <== 定义source和channel的连线
a1.sinks.k1.channel = c1     <== 定义sink的channel的连线
        

Agent的三个组件
两根连线定义好的
==> agent配置完毕了
启动命令

flume-ng agent \
--name a1 \
--conf $FLUME_HOME/conf \
--conf-file $FLUME_HOME/script/netcat.conf \
-Dflume.root.logger=INFO,console

[root@pxj /root]#telnet localhost 44444
Trying ::1...
Connected to localhost.
Escape character is '^]'.
xuejie
OK
jinlig
OK
ccj
OK
2020-02-15 01:11:06,569 (SinkRunner-PollingRunner-DefaultSinkProcessor) [INFO - org.apache.flume.sink.LoggerSink.process(LoggerSink.java:95)] Event: { headers:{} body: 78 75 65 6A 69 65 0D                            xuejie. }
2020-02-15 01:11:15,574 (SinkRunner-PollingRunner-DefaultSinkProcessor) [INFO - org.apache.flume.sink.LoggerSink.process(LoggerSink.java:95)] Event: { headers:{} body: 6A 69 6E 6C 69 67 0D                            jinlig. }
2020-02-15 01:11:16,513 (SinkRunner-PollingRunner-DefaultSinkProcessor) [INFO - org.apache.flume.sink.LoggerSink.process(LoggerSink.java:95)] Event: { headers:{} body: 63 63 6A 0D                                     ccj. }

2.HDFS

# Name the components on this agent
a1.sources = r1
a1.sinks = k1
a1.channels = c1
# Describe/configure the source
a1.sources.r1.type = exec
a1.sources.r1.command = tail -F /home/pxj/datas/1.log
a1.sources.r1.shell = /bin/bash -c
# 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 = hdfs
a1.sinks.k1.hdfs.path =hdfs://pxj:9000/pxj/test/flume/tail
a1.sinks.k1.hdfs.batchSize=10
a1.sinks.k1.hdfs.fileType=DataStream 
a1.sinks.k1.hdfs.writeFormat=Text
# Bind the source and sink to the channel
a1.sources.r1.channels = c1
a1.sinks.k1.channel = c1
flume-ng agent \
--name a1 \
--conf $FLUME_HOME/conf \
--conf-file $FLUME_HOME/script/hdfs.conf \
-Dflume.root.logger=INFO,console

spooldir

# Name the components on this agent
a1.sources = r1
a1.sinks = k1
a1.channels = c1
# Describe/configure the source
a1.sources.r1.type = spooldir
a1.sources.r1.spoolDir =/home/pxj/datas/
# 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 = hdfs
a1.sinks.k1.hdfs.path =hdfs://pxj:9000/pxj/test/flume/tail/%Y%m%d%H%M
a1.sinks.k1.hdfs.batchSize=10
a1.sinks.k1.hdfs.fileType=DataStream 
a1.sinks.k1.hdfs.writeFormat=Text
a1.sinks.k1.hdfs.useLocalTimeStamp=true
a1.sinks.k1.hdfs.filePrefix=pxj-
# Bind the source and sink to the channel
a1.sources.r1.channels = c1
a1.sinks.k1.channel = c1
flume-ng agent \
--name a1 \
--conf $FLUME_HOME/conf \
--conf-file $FLUME_HOME/script/spooldir.conf \
-Dflume.root.logger=INFO,console
If a file is written to after being placed into the spooling directory, Flume will print an error to its log file and stop processing.
If a file name is reused at a later time, Flume will print an error to its log file and stop processing.

tailDIR --home

# Name the components on this agent
a1.sources = r1
a1.sinks = k1
a1.channels = c1
# Describe/configure the source
a1.sources.r1.type = TAILDIR
a1.sources.r1.positionFile=/home/pxj/datas/taildir_position.json
a1.sources.r1.filegroups = f1 f2
a1.sources.r1.filegroups.f1 = /home/pxj/flume/test1/example.log
a1.sources.r1.headers.f1.headerKey1 = value1
a1.sources.r1.filegroups.f2 = /home/pxj/flume/test2/.*log.*
a1.sources.r1.headers.f2.headerKey1 = value2
a1.sources.r1.headers.f2.headerKey2 = value2-2
# 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
# Bind the source and sink to the channel
a1.sources.r1.channels = c1
a1.sinks.k1.channel = c1
flume-ng agent \
--name a1 \
--conf $FLUME_HOME/conf \
--conf-file $FLUME_HOME/script/taildir.conf \
-Dflume.root.logger=INFO,console

avro

# 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.bind = 0.0.0.0
a1.sources.r1.port = 44444
# 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
# Bind the source and sink to the channel
a1.sources.r1.channels = c1
a1.sinks.k1.channel = c1

代码发送到44444端口

package com.ccj.pxj.flume;
import org.apache.log4j.Logger;
public class LoggerData {
    private static Logger logger = Logger.getLogger(LoggerData.class.getName());
    public static void main(String[] args) throws Exception {
         int i=0;
         while (true){
             Thread.sleep(1000);
             logger.info("pxj:"+i++);
         }
    }
}

log4j配置

log4j.rootCategory=INFO, console, flume
log4j.appender.console=org.apache.log4j.ConsoleAppender
log4j.appender.console.target=System.err
log4j.appender.console.layout=org.apache.log4j.PatternLayout
log4j.appender.console.layout.ConversionPattern=%d{yy/MM/dd HH:mm:ss} %p %c{1}: %m%n

log4j.appender.flume = org.apache.flume.clients.log4jappender.Log4jAppender
log4j.appender.flume.Hostname = pxj
log4j.appender.flume.Port = 44444
log4j.appender.flume.UnsafeMode = true
log4j.appender.flume.layout=org.apache.log4j.PatternLayout

pom

<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0modelVersion>

    <groupId>com.ccj.pxj.flumegroupId>
    <artifactId>flumeartifactId>
    <version>1.0-SNAPSHOTversion>
<dependencies>
    <dependency>
        <groupId>org.apache.flume.flume-ng-clientsgroupId>
        <artifactId>flume-ng-log4jappenderartifactId>
        <version>1.6.0version>
    dependency>
dependencies>

project>

作者：pxj(潘陈)
日期：2020-02-16 凌晨1:08:32
你若安好便是晴天