Hadoop搭建(完全分布式)

时间:2024-02-15 14:43:44

节点分布:

bigdata-master bigdata-slave1 bigdata-salve2

NameNode

NodeManager

NodeManager

SecondaryNameNode DataNode DataNode
ResourceManager
NodeManager
DataNode

目录

一、jdk安装:

二、hadoop安装


一、jdk安装:

jdk-8u212链接:https://pan.baidu.com/s/1avN5VPdswFlMZQNeXReAHg 
提取码:50w6

1.解压

[root@bigdata-master software]# tar -zxvf jdk-8u212-linux-x64.tar.gz -C /opt/module/

 2.环境变量

vim /etc/profile
添加如下配置
 
```
export JAVA_HOME=/opt/module/jdk1.8.0_212
export PATH=$PATH:$JAVA_HOME/bin
```

:wq保存退出

 使配置生效

source  /etc/profile

 3.查看版本

java -version

4.免密登录(三台都执行)一定要弄的

ssh-keygen -t rsa

其中会让输入密码等操作,直接不输入,按enter键

会在/root/.ssh产生id_rsa和id_rsa.pub文件

cd /root/.ssh
cat id_rsa.pub >>authorized_keys

将其他节点的id_rsa.pub内容添加到本节点的authorized_keys文件中(每个节点需要执行)

 

二、hadoop安装

hadoop-3.1.3链接:https://pan.baidu.com/s/11yFkirCiT6tdo_9i1jWwkw 
提取码:stgv

1.解压

tar -zxvf hadoop-3.1.3.tar.gz -C /opt/module/

 2.配置文件

cd /opt/module/hadoop-3.1.3/etc/hadoop/

(1).  core-site.xml

vim core-site.xml
<configuration>
    <property>
        <name>hadoop.tmp.dir</name>
        <value>file:/opt/module/hadoop-3.1.3/tmp</value>
        <description>Abase for other temporary directories.</description>
    </property>
    <property>
        <name>fs.defaultFS</name>
        <value>hdfs://bigdata-master:9000</value>
    </property>
        <property>
        <name>hadoop.proxyuser.root.hosts</name>
        <description>对root用户不进行限制</description>
        <value>*</value>
    </property>
    <property>
        <name>hadoop.proxyuser.root.groups</name>
        <value>*</value>
        <description>对root群组不限制</description>
    </property>
</configuration>

 保存退出(:wq) 

(2). hdfs-site.xml

vim hdfs-site.xml
<configuration>
    <property>
        <name>dfs.replication</name>
        <value>2</value>
    </property>
    <property>
        <name>dfs.namenode.name.dir</name>
        <value>file:/opt/module/hadoop-3.1.3/tmp/dfs/name</value>
    </property>
    <property>
        <name>dfs.datanode.data.dir</name>
        <value>file:/opt/module/hadoop-3.1.3/tmp/dfs/data</value>
    </property>
</configuration>

  保存退出(:wq) 

 (3). mapred-site.xml

vim mapred-site.xml
<configuration>
    <property>
        <name>mapreduce.framework.name</name>
        <value>yarn</value>
    </property>
    <property>
       <name>yarn.app.mapreduce.am.env</name>
       <value>HADOOP_MAPRED_HOME=${HADOOP_HOME}</value>
     </property>
     <property>
       <name>mapreduce.map.env</name>
       <value>HADOOP_MAPRED_HOME=${HADOOP_HOME}</value>
     </property>
     <property>
       <name>mapreduce.reduce.env</name>
       <value>HADOOP_MAPRED_HOME=${HADOOP_HOME}</value>
     </property>
 
</configuration>

 保存退出(:wq) 

 (4). yarn-site.xml

vim yarn-site.xml
<configuration>
 
<!-- Site specific YARN configuration properties -->
 
<property>
    <name>yarn.nodemanager.aux-services</name>
    <value>mapreduce_shuffle</value>
</property>
<property>
    <name>yarn.resourcemanager.hostname</name>
    <value>bigdata-master</value>
</property>
 
</configuration>

 保存退出(:wq)  

(5).yarn-env,sh

vim yarn-env.sh
export JAVA_HOME=/opt/module/jdk1.8.0_212

(6).workers

vim workers
bigdata-master
bigdata-slave1
bigdata-slave2

 ​​

(7).

修改 /opt/module/hadoop-3.1.3/sbin/start-dfs.sh和 /opt/module/hadoop-3.1.3/sbin/stop-dfs.sh

vim /opt/module/hadoop-3.1.3/sbin/start-dfs.sh
HDFS_DATANODE_USER=root
HADOOP_SECURE_DN_USER=hdfs
HDFS_NAMENODE_USER=root
HDFS_SECONDARYNAMENODE_USER=root

 

/opt/module/hadoop-3.1.3/sbin/stop-dfs.sh
HDFS_DATANODE_USER=root
HADOOP_SECURE_DN_USER=hdfs
HDFS_NAMENODE_USER=root
HDFS_SECONDARYNAMENODE_USER=root

(8).

修改 /opt/module/hadoop-3.1.3/sbin/start-yarn.sh和 /opt/module/hadoop-3.1.3/sbin/stop-yarn.sh

vim /opt/module/hadoop-3.1.3/sbin/start-yarn.sh
YARN_RESOURCEMANAGER_USER=root
HADOOP_SECURE_DN_USER=yarn
YARN_NODEMANAGER_USER=root

vim /opt/module/hadoop-3.1.3/sbin/stop-yarn.sh
YARN_RESOURCEMANAGER_USER=root
HADOOP_SECURE_DN_USER=yarn
YARN_NODEMANAGER_USER=root

3.环境变量

vim  /etc/profile
#HADOOP_HOME
export HADOOP_HOME=/opt/module/hadoop-3.1.3
export HADOOP_MAPRED_HOME=$HADOOP_HOME
export HADOOP_COMMON_HOME=$HADOOP_HOME
export HADOOP_HDFS_HOME=$HADOOP_HOME
export YARN_HOME=$HADOOP_HOME
export PATH=$PATH:$HADOOP_HOME/bin
export PATH=$PATH:$HADOOP_HOME/sbin

使变量生效

source  /etc/profile

4.分发(或者自己手配以上步骤给另外两台)

分发hadoop和jdk 

[root@bigdata-master hadoop]# scp -r /opt/module/ root@bigdata-slave1:/opt/module
[root@bigdata-master hadoop]# scp -r /opt/module/ root@bigdata-slave2:/opt/module

配置另外两台的环境变量 并使变量生效

source /etc/profile

 5.Hdfs格式化(bigdata-master)

不要多次格式化

hdfs namenode -format

 6.启动hadoop

start-all.sh

jps查看进程: