flume环境配置-传输Hadoop日志（namenode或datanode日志）

解压文件

修改文件名

 配置环境变量

执行flume-ng version 

将flume-env.sh.template改名为flume-env.sh， 并修改其配置

启动Flume传输Hadoop日志

启动flume 

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解压文件

tar -zxvf apache-flume-1.9.0-bin.tar.gz -C /opt

修改文件名

mv apache-flume-1.9.0-bin flume

 配置环境变量

vim /etc/profile

        需要保证hadoop与hive的环境变量存在切无误

export HADOOP_HOME=/opt/module/hadoop-3.3.1
export PATH=$PATH:$HADOOP_HOME/bin:$HADOOP_HOME/sbin

export HIVE_HOME=/opt/module/hive-3.1.2
export PATH=$PATH:$HIVE_HOME/bin

export FLUME_HOME=/opt/flume
export PATH=$FLUME_HOME/bin:$PATH

source /etc/profile

执行flume-ng version 

将 lib 文件夹下的 guava-11.0.2.jar 删除以兼容 Hadoop 3.1.3 

rm /opt/flume/lib/guava-11.0.2.jar

将flume-env.sh.template改名为flume-env.sh， 并修改其配置

         flume-1.9.0/conf目录下

cp flume-env.sh.template flume-env.sh
vi flume/conf/flume-env.sh 

export JAVA_HOME=/opt/jdk1.8

        flume必须持有hadoop相关的包才能将数据输出到hdfs， 将如下包上传到flume/lib下 

启动Flume传输Hadoop日志

       flume必须持有hadoop相关的包才能将数据输出到hdfs， 将如下包上传到flume/lib下 

cp $HADOOP_HOME/share/hadoop/common/hadoop-common-3.1.3.jar  /opt/flume/lib
cp $HADOOP_HOME/share/hadoop/common/lib/hadoop-auth-3.1.3.jar /opt/flume/lib
cp $HADOOP_HOME/share/hadoop/common/lib/commons-configuration2-2.1.1.jar /opt/flume/lib

        将hadoop的hdfs-site.xml和core-site.xml 放到flume/conf下

cp $HADOOP_HOME/etc/hadoop/core-site.xml //opt/flume/conf
cp $HADOOP_HOME/etc/hadoop/hdfs-site.xml //opt/flume/conf

        flume-1.9.0/conf目录下

 rm /opt/flume-1.9.0/lib/guava-11.0.2.jar

        配置文件监控NameNode 日志文件

        flume/conf目录下

cp flume-conf.properties.template flume-conf.properties

        在 Hadoop 的默认配置下，NameNode 的日志文件位于 $HADOOP_HOME/logs/hadoop-hdfs-namenode-[hostname].log。

其中，$HADOOP_HOME 为 Hadoop 的安装目录，[hostname] 为运行 NameNode 的主机名。如果启用了安全模式，还会有一个专门的安全模式日志文件，路径为 $HADOOP_HOME/logs/hadoop-hdfs-namenode-[hostname]-safemode.log。

vim flume-conf.properties

a1.sources = r1
a1.sinks = k1
a1.channels = c1

a1.sources.r1.type = exec
a1.sources.r1.command = tail -F /opt/hadoop-3.1.3/logs/hadoop-root-namenode-master.log

a1.sources.r1.basenameHeader=true
a1.sources.r1.basenameHeaderKey=fileName

a1.channels.c1.type = memory

a1.sinks.k1.type = hdfs
a1.sinks.k1.hdfs.path = hdfs://master:8020/tmp/flume/%Y%m%d/%H

a1.sinks.k1.hdfs.filePrefix = %{fileName}
a1.sinks.k1.hdfs.fileType=DataStream

a1.sinks.k1.hdfs.useLocalTimeStamp = true

a1.sources.r1.channels = c1
a1.sinks.k1.channel = c1

启动flume 

flume-ng agent --conf conf/ --conf-file /opt/flume/conf/flume-conf.properties --name a1  -Dflume.root.logger=DEBUG,console

        在hdfs上查看内容

hdfs dfs -ls /tmp/flume

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