Hadoop3.1.0完全分布式集群部署（hadoop完全分布式环境部署）

Hadoop3.1.0完全分布式集群部署，三台服务器部署结构如下github配置文件源码地址

#部署完成后

root@servera:/opt/hadoop/hadoop-3.1.0# jps

14056 SecondaryNameNode

14633 Jps

13706 NameNode

14317 ResourceManager

root@serverb:~# jps

5288 NodeManager

5162 DataNode

5421 Jps

root@serverc:~# jps

4545 NodeManager

4371 DataNode

4678 Jps

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如上图，一共三台机器作为集群，servera作为master，其他两台作为worker。

2.开始部署-前期准备(三台机器都需要进行如下操作)

2.1.配置hosts文件【三台】

vim /etc/hosts

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10.80.80.110 servera

10.80.80.111 serverb

10.80.80.112 serverc

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2.2.jdk 安装【三台】

下载jdk

wget --no-check-certificate --no-cookies --header "Cookie: oraclelicense=accept-securebackup-cookie" http://download.oracle.com/otn-pub/java/jdk/8u172-b11/a58eab1ec242421181065cdc37240b08/jdk-8u172-linux-x64.tar.gz

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解压

mkdir /opt/java

wget --no-check-certificate --no-cookies --header "Cookie: oraclelicense=accept-securebackup-cookie" http://download.oracle.com/otn-pub/java/jdk/8u172-b11/a58eab1ec242421181065cdc37240b08/jdk-8u172-linux-x64.tar.gz

tar -zxf jdk-8u172-linux-x64.tar.gz

mv jdk1.8.0_172/ /opt/java/

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配置JAVA变量

vim /etc/profile.d/jdk-1.8.sh

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#!/bin/sh

# Author:wangxiaolei 王小雷

# Blog: http://blog.csdn.net/dream_an

# Github: https://github.com/wangxiaoleiai

# web: www.xiaolei.wang

# Date: 2018.05

# Path: /etc/profile.d/

export JAVA_HOME=/opt/java/jdk1.8.0_172

export JRE_HOME=${JAVA_HOME}/jre

export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib

export PATH=${JAVA_HOME}/bin:$PATH

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# 使环境变量生效

source /etc/profile

# 查看 Java

java --version

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2.3.pdsh、ssh安装【三台】

root@servera:~# apt install ssh pdsh

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echo ssh>/etc/pdsh/rcmd_default

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2.4.免密码登录自身【三台】

$ ssh-keygen -t rsa -P '' -f ~/.ssh/id_rsa

$ cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys

$ chmod 0600 ~/.ssh/authorized_keys

ssh localhost(首次需输入yes)

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2.5.servera免密码登录其他机器（master免密码登录worker）【单台，只需在servera上执行】

ssh-copy-id -i ~/.ssh/id_rsa.pub servera

ssh-copy-id -i ~/.ssh/id_rsa.pub serverb

ssh-copy-id -i ~/.ssh/id_rsa.pub serverc

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3.hadoop3+配置文件 github配置文件源码地址

共需要配置/opt/hadoop/hadoop-3.1.0/etc/hadoop/下的六个个文件，分别是

hadoop-env.sh、core-site.xml、hdfs-site.xml、yarn-site.xml、mapred-site.xml、workers

3.1. hadoop-env.sh 添加如下内容

export JAVA_HOME=/opt/java/jdk1.8.0_172/

export HDFS_NAMENODE_USER="root"

export HDFS_DATANODE_USER="root"

export HDFS_SECONDARYNAMENODE_USER="root"

export YARN_RESOURCEMANAGER_USER="root"

export YARN_NODEMANAGER_USER="root"

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3.2. core-site.xml

<configuration>

<!-- 指定hdfs的nameservice为ns1 -->

<property>

<name>fs.defaultFS</name>

<value>hdfs://ruizhia:9000</value>

</property>

<property>

<name>io.file.buffer.size</name>

<value>131072</value>

</property>

</configuration>

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3.3. hdfs-site.xml

<configuration>

<!-- Configurations for NameNode: -->

<property>

<name>dfs.namenode.name.dir</name>

<value>/var/lib/hadoop/hdfs/name/</value>

</property>

<property>

<name>dfs.blocksize</name>

<value>268435456</value>

</property>

<property>

<name>dfs.namenode.handler.count </name>

<value>100</value>

</property>

<!-- Configurations for DataNode: -->

<property>

<name>dfs.datanode.data.dir</name>

<value>/var/lib/hadoop/hdfs/data/</value>

</property>

<property>

<name>dfs.replication</name>

<value>1</value>

</property>

</configuration>

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3.4. yarn-site.xml

<configuration>

<!-- Site specific YARN configuration properties -->

<!-- Configurations for ResourceManager and NodeManager: -->

<!-- Configurations for ResourceManager: -->

<property>

<name>yarn.resourcemanager.hostname</name>

<value>servera</value>

</property>

<!-- 配置外网只需要替换外网ip为真实ip，否则默认为 localhost:8088 -->

<!-- <property>

<name>yarn.resourcemanager.webapp.address</name>

<value>外网ip:8088</value>

</property> -->

<!-- Configurations for NodeManager: -->

<property>

<name>yarn.nodemanager.aux-services</name>

<value>mapreduce_shuffle</value>

</property>

<!-- Configurations for History Server (Needs to be moved elsewhere): -->

</configuration>

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3.5. mapred-site.xml

<configuration>

<!-- Configurations for MapReduce Applications: -->

<property>

<name>mapreduce.framework.name</name>

<value>yarn</value>

</property>

</configuration>

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3.6. workers

serverb

serverc

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4. 复制Hadoop文件到其他集群、配置Hadoop环境变量、格式化hdfs、开启集群、查看、关闭、重置集群

4.1. 将步骤3配置好的hadoop文件复制到其他同样位置的机器上

/opt/hadoop/hadoop-3.1.0

4.2 配置Hadoop环境变量【三台机器都操作】

vim /etc/profile.d/hadoop-3.1.0.sh

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#!/bin/sh

# Author:wangxiaolei 王小雷

# Blog: http://blog.csdn.net/dream_an

# Github: https://github.com/wangxiaoleiai

# Date: 201805

# web: www.xiaolei.wang

# Path: /etc/profile.d/

export HADOOP_HOME="/opt/hadoop/hadoop-3.1.0"

export PATH="$HADOOP_HOME/bin:$PATH"

export HADOOP_CONF_DIR=$HADOOP_HOME/etc/hadoop

export YARN_CONF_DIR=$HADOOP_HOME/etc/hadoop

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source /etc/profile

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4.3. 格式化HDFS [只有首次部署才可使用]【谨慎操作，只在servera上操作】

/opt/hadoop/hadoop-3.1.0/bin/hdfs namenode -format myClusterName

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4.4. 开启 【只在servera上操作】

/opt/hadoop/hadoop-3.1.0/sbin/start-dfs.sh

/opt/hadoop/hadoop-3.1.0/sbin/start-yarn.sh

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4.5. 查看 【三台】

jps

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4.6. web端localhost:8088查看【localhost只定servera的localhost，也可以换成外网ip，在详见步骤3.4. yarn-site.xml 】

4.7. 关闭 【只在servera上操作】

/opt/hadoop/hadoop-3.1.0/sbin/stop-dfs.sh

/opt/hadoop/hadoop-3.1.0/sbin/stop-yarn.sh

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4.8. 重置hadoop环境 [移除hadoop hdfs log文件] 【谨慎操作，只在servera上操作】

rm -rf /opt/hadoop/hadoop-3.1.0/logs/*

rm -rf /var/lib/hadoop/

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5.遇到的坑 pdsh@servera: servera: connect: Connection refused

root@servera:/opt/hadoop/hadoop-3.1.0# sbin/start-dfs.sh

Starting namenodes on [servera]

pdsh@servera: servera: connect: Connection refused

Starting datanodes

pdsh@servera: serverc: connect: Connection refused

pdsh@servera: serverb: connect: Connection refused

Starting secondary namenodes [servera]

pdsh@servera: servera: connect: Connection refused

解决方法步骤2.3中

echo ssh>/etc/pdsh/rcmd_default

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6.Hadoop集群部署相关文档参考

Hadoop Cluster Setup

超详细从零记录Hadoop2.7.3完全分布式集群部署过程

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作者：王小雷-多面手

来源：CSDN

原文：https://blog.csdn.net/dream_an/article/details/80258283

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