CHD-5.3.6集群上Flume的文件监控

收集hive的log
    hive的运行日志：
    /home/hadoop/CDH5.3.6/hive-0.13.1-cdh5.3.6/log/hive.log

* memory

*hdfs
  /user/flume/hive-log

1.需要四个包：

commons-configuration-1.6.jar
hadoop-auth-2.5.0-cdh5.3.6.jar
hadoop-common-2.5.0-cdh5.3.6.jar
hadoop-hdfs-2.5.0-cdh5.3.6.jar

传到/home/hadoop/CDH5.3.6/flume-1.5.0-cdh5.3.6/lib下

2.编写配置文件

vi  flume_logfile_tail.conf

# The configuration file needs to define the sources,
# the channels and the sinks.
# Sources, channels and sinks are defined per agent,
# in this case called 'agent'

###define agent
a2.sources = r2
a2.channels = c2
a2.sinks = k2

### define sources
a2.sources.r2.type = exec
a2.sources.r2.command = tail -f /home/hadoop/CDH5.3.6/hive-0.13.1-cdh5.3.6/log/hive.log
a2.sources.r2.shell = /bin/bash -c

### define channel
a2.channels.c2.type = memory
a2.channels.c2.capacity = 1000
a2.channels.c2.transactionCapacity = 100

### define sink
a2.sinks.k2.type = hdfs
a2.sinks.k2.hdfs.path = hdfs://192.168.1.30:9000/user/flume/hive-log
a2.sinks.k2.hdfs.fileType = DataStream
a2.sinks.k2.hdfs.writeFormat = Text
a2.sinks.k2.hdfs.batchSize = 10

### bind the source and sinks  to the channel
a2.sources.r2.channels = c2
a2.sinks.k2.channel = c2

说明文档：http://flume.apache.org/releases/content/1.9.0/FlumeUserGuide.html#hdfs-sink

创建hdfs目录  hdfs dfs -mkdir /user/flume/hive-log

运行命令：

bin/flume-ng agent \
-c conf \
-n a2 \
-f conf/flume_logfile_tail.conf  \
-Dflume.root.logger=DEBUG,console

在第二个窗口打开hive

[hadoop@master bin]$ hive

Logging initialized using configuration in file:/home/hadoop/CDH5.3.6/hive-0.13.1-cdh5.3.6/conf/hive-log4j.properties
hive (default)> show databases;
OK
database_name
default
Time taken: 0.354 seconds, Fetched: 1 row(s)
hive (default)> show tables;
OK
tab_name
dept
Time taken: 0.037 seconds, Fetched: 1 row(s)
hive (default)> select * from dept;
OK
dept.deptno     dept.dname      dept.loc
10      ACCOUNTING      NEW YORK
20      RESEARCH        DALLAS
30      SALES   CHICAGO
40      OPERATIONS      BOSTON
Time taken: 0.43 seconds, Fetched: 4 row(s)

在hive.log的日志显示：

在flume监控窗口输出如下：

查看HDFS系统上生成的文件：

hdfs dfs -text /user/flume/hive-log/FlumeData.1561349308182

是和hive日志hive.log文件内容一致的。

实现了hive的日志监控到HDFS文件系统上。