查看“Hadoop install”的源代码

=== ENV ===

==== USER ====
groupadd hadoop -g 1001

useradd hdfs -g hadoop -u 1001

==== Java ====
/usr/bin/java -> /usr/java/jdk1.8.0_361/jre/bin/java

==== hadoop ====
ln -s /opt/hadoop-3.3.0 /opt/hadoop

==== profile ====
<nowiki>#</nowiki> Java, 20201010, Adam

export JAVA_HOME=/usr/java/jdk1.8.0_361

export PATH=$PATH:$JAVA_HOME/bin

<nowiki>#</nowiki> hadoop, 20201010, Adam

export HADOOP_HOME=/opt/hadoop

export PATH=$PATH:$HADOOP_HOME/bin

export PATH=$PATH:$HADOOP_HOME/sbin

export HADOOP_CONF_DIR=${HADOOP_HOME}/etc/hadoop

=== Hadoop 配置 ===

==== 配置 Hadoop 环境脚本文件中的 JAVA_HOME 参数 ====
<nowiki>#</nowiki> hadoop是守护线程 读取不到 /etc/profile 里面配置的JAVA_HOME路径

<nowiki>#</nowiki> /opt/hadoop/etc/hadoop/

<nowiki>#</nowiki> hadoop-env.sh, mapred-env.sh, yarn-env.sh

cp hadoop-env.sh hadoop-env.sh.20210409

cp mapred-env.sh mapred-env.sh.20210409

cp yarn-env.sh   yarn-env.sh.20210409

echo '

<nowiki>#</nowiki> hdfs, 20210409, Adam

export JAVA_HOME=/usr/java/jdk1.8.0_361' >> 
====Setup====

=====core-site.xml (Common组件)=====
 <configuration>
   <property>
     <!-- 配置hdfs地址 -->
     <name>fs.defaultFS</name>
     <value>hdfs://g2-hdfs-01:9000</value>
   </property>
   <property>
     <name>io.file.buffer.size</name>
     <value>131072</value>
   </property>
   <property>
          <!-- 保存临时文件目录 -->
     <name>hadoop.tmp.dir</name>
     <value>/u01/hdfs/tmp</value>
   </property>
 </configuration>
=====hdfs-site.xml (HDFS组件)=====
 <configuration>
   <property>
     <!-- 主节点地址 -->
     <name>dfs.namenode.http-address</name>
     <value>g2-hdfs-01:9870</value>
   </property>
   <property>
          <!-- 第二节点地址 -->
     <name>dfs.namenode.secondary.http-address</name>
     <value>g2-hdfs-02:9870</value>
   </property>
   <property>
     <name>dfs.namenode.name.dir</name>
     <value>file:/u01/hdfs/dfs/nn</value>
   </property>
   <property>
     <name>dfs.datanode.data.dir</name>
     <value>file:/u01/hdfs/dfs/dn</value>
   </property>
   <property> 
     <name>dfs.webhdfs.enabled</name> 
     <value>true</value> 
   </property>
   <property>
          <!-- 配置false后，无需权限即可生成dfs上的文件 -->
     <name>dfs.permissions</name>
     <value>false</value>
   </property>
 </configuration>
 
 -- del
   <property>
          <!-- 备份数为默认值3 -->
     <name>dfs.replication</name>
     <value>3</value>
   </property>
   <property>
     <name>dfs.blocksize</name>
     <value>268435456</value>
   </property>
   <property>
     <name>dfs.namenode.handler.count</name>
     <value>100</value>
   </property>
=====mapred-site.xml=====
 <configuration>
   <property>
     <name>mapreduce.framework.name</name>
     <value>yarn</value> 
   </property>
 </configuration>
 
 -- del
   <property>
      <name>mapreduce.jobhistory.address</name>
      <value>g2-hdfs-01:10020</value>
   </property>
   <property>
      <name>mapreduce.jobhistory.webapp.address</name>
      <value>g2-hdfs-01:19888</value>
   </property>
   <property>
      <name>mapreduce.application.classpath</name>
      <value>$HADOOP_MAPRED_HOME/share/hadoop/mapreduce/*:$HADOOP_MAPRED_HOME/share/ hadoop/mapreduce/lib/*</value>
   </property>
=====yarn-site.xml=====
 <configuration>
   <property>
     <name>yarn.resourcemanager.hostname</name>
     <value>g2-hdfs-01</value>
   </property>
   <property>
     <name>yarn.nodemanager.aux-services</name>  
     <value>mapreduce_shuffle</value>
   </property>
   <property>
     <name>yarn.resourcemanager.webapp.address</name>
     <value>g2-hdfs-01:8088</value>
   </property>
   <property>
     <name>yarn.scheduler.maximum-allocation-mb</name>
     <value>32768</value>
   </property>
   <property>
     <name>yarn.nodemanager.vmem-check-enabled</name>
     <value>false</value>
   </property>
   <property>
     <name>yarn.nodemanager.env-whitelist</name>
     <value>JAVA_HOME,HADOOP_COMMON_HOME,HADOOP_HDFS_HOME,HADOOP_CONF_DIR,CLASSPATH_PREPE ND_DISTCACHE,HADOOP_YARN_HOME,HADOOP_MAPRED_HOME</value>
   </property>
 </configuration>

   <property>
     <name>yarn.resourcemanager.webapp.address</name>
     <value>hadoop01/192.168.44.5:8088</value>
     <description>配置外网只需要替换外网ip为真实ip，否则默认为 localhost:8088</description>
   </property>
 
 yarn.resourcemanager.hostname
 指定yarn的ResourceManager管理界面的地址，不配的话，Active Node始终为0
 yarn.scheduler.maximum-allocation-mb
 每个节点可用内存,单位MB,默认8182MB
 yarn.nodemanager.aux-services
 reducer获取数据的方式
 yarn.nodemanager.vmem-check-enabled
 false = 忽略虚拟内存的检查



<nowiki>#</nowiki> workers

g2-hdfs-01

g2-hdfs-02

..

=== INIT===
 # chown
 chown -R hdfs:hadoop /opt/hadoop*
 # nn
 /opt/hadoop/bin/hdfs namenode -format
===Start===
 ## Start : root(发现需要用 hdfs 停服务，root不可停）
 /opt/hadoop/sbin/start-dfs.sh
 /opt/hadoop/sbin/start-yarn.sh
 
 /opt/hadoop/sbin/stop-dfs.sh
 /opt/hadoop/sbin/stop-yarn.sh
 
 http://mc:9870   # hdfs
 http://mc:8088   # yarn
 
 ## 单节点启停
 # /opt/hadoop/bin
 hdfs --daemon start datanode
 hdfs --daemon start namenode
 
 yarn --daemon start nodemanager
 yarn --daemon stop resourcemanager 
[[分类:Develop]]
[[分类:Hadoop]]