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hadoop该怎么部署

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hadoop部署

Hadoop介绍:

广义: 以apache hadoop软件为主的生态圈(hive zookeeper spark hbase)

狭义: 单指apache hadoop软件

相关官网：

hadoop.apache.org

hive.apache.org

spark.apache.org

cdh-hadoop：http://archive.cloudera.com/cdh6/cdh/5/hadoop-2.6.0-cdh6.7.0.tar.gz

hadoop软件及版本:

1.x 企业不用

2.x 主流

3.x 没有企业敢用

a.采坑

b.很多公司都是CDH5.x部署大数据环境 (www.cloudera.com)，即2.6.0-cdh6.7.0 =? apache hadoop2.6.0

很多公司都是CDH5.X部署大数据环境(www.cloudera.com),相当于是把一个生态圈的组件，集中成为一个系统。

作为基础环境，里面装的2.6.0-cdh6.7.0，注意此版本不等于apache hadoop2.6.0，因为

cdh6.7.0中hadoop做了bug升级。

hadoop软件:

hdfs：存储 分布式文件系统

mapreduce:计算。用java计算job1,job2,但企业不用java(开发难度大，代码复杂)

yarn: 资源和作业调度(cpu memory分配)，即：哪个作业分配到哪个节点中调度。

--如果需要按照ssh

Ubuntu Linux:

$ sudo apt-get install ssh

$ sudo apt-get install rsync

----------------------------------------------------------------------------------------------------

安装部分：

环境：CentOS 伪分布安装：即单节点安装

HADOOP版本：hadoop-2.6.0-cdh6.7.0.tar.gz

JDK版本：jdk-8u45-linux-x64.gz

安装原则：不同软件需要指定对应的用户

linux       root用户

MySQL     mysqladmin用户

hadoop  hadoop用户

1.创建hadoop用户和上传hadoop软件

******************************

useradd hadoop

su - hadoop

mkdir app

cd app/

上传hadoop包

结果如下：

[hadoop@hadoop app]$ pwd

/home/hadoop/app

[hadoop@hadoop app]$ ls -l

total 304288

drwxr-xr-x 15 hadoop hadoop      4096 Feb 14 23:37 hadoop-2.6.0-cdh6.7.0

-rw-r--r--  1 root   root   311585484 Feb 14 17:32 hadoop-2.6.0-cdh6.7.0.tar.gz

***********************************

2.部署jdk ,要用CDH版本的JDK

***********************************

创建JDK目录，上传JDK包要用CDH版本的JDK

su - root

mkdir /usr/java             #上传JDK包到此目录

mkdir /usr/share/java   #部署CDH环境时jdbc jar包需要放到此目录，否则报错

cd   /usr/java

tar   -xzvf     jdk-8u45-linux-x64.gz  #解压JDK

drwxr-xr-x 8 uucp  143      4096 Apr 11  2015 jdk1.8.0_45   #注意解压后用户、组是不对的，需要改用户组为root:root

chown -R root:root jdk1.8.0_45

drwxr-xr-x 8 root root      4096 Apr 11  2015 jdk1.8.0_45

结果如下：

[root@hadoop java]# pwd

/usr/java

[root@hadoop java]# ll

total 169216

drwxr-xr-x 8 root root      4096 Apr 11  2015 jdk1.8.0_45

-rw-r--r-- 1 root root 173271626 Jan 26 18:35 jdk-8u45-linux-x64.gz

*****************************************

3.设置java环境变量

su - root

vi /etc/profile

export JAVA_HOME=/usr/java/jdk1.8.0_45

export JRE_HOME=$JAVA_HOME/jre

export CLASSPATH=.:$JAVA_HOME/lib:$JER_HOME/lib:$CLASSPATH

export PATH=$JAVA_HOME/bin:$JER_HOME/bin:$PATH

source /etc/profile

[root@hadoop java]# which java

/usr/java/jdk1.8.0_45/bin/java

**********************

4.解压hadoop

su - hadoop

cd  /home/hadoop/app

[hadoop@hadoop002 app]$ tar -xzvf hadoop-2.6.0-cdh6.7.0.tar.gz

[hadoop@hadoop002 app]$ cd hadoop-2.6.0-cdh6.7.0

[hadoop@hadoop002 hadoop-2.6.0-cdh6.7.0]$ ll

total 76

drwxr-xr-x  2 hadoop hadoop  4096 Mar 24  2016 bin  可执行脚本

drwxr-xr-x  2 hadoop hadoop  4096 Mar 24  2016 bin-mapreduce1

drwxr-xr-x  3 hadoop hadoop  4096 Mar 24  2016 cloudera

drwxr-xr-x  6 hadoop hadoop  4096 Mar 24  2016 etc  配置目录(conf)

drwxr-xr-x  5 hadoop hadoop  4096 Mar 24  2016 examples

drwxr-xr-x  3 hadoop hadoop  4096 Mar 24  2016 examples-mapreduce1

drwxr-xr-x  2 hadoop hadoop  4096 Mar 24  2016 include

drwxr-xr-x  3 hadoop hadoop  4096 Mar 24  2016 lib  jar包目录

drwxr-xr-x  2 hadoop hadoop  4096 Mar 24  2016 libexec

drwxr-xr-x  3 hadoop hadoop  4096 Mar 24  2016 sbin hadoop组件的启动 停止脚本

drwxr-xr-x  4 hadoop hadoop  4096 Mar 24  2016 share

drwxr-xr-x 17 hadoop hadoop  4096 Mar 24  2016 src

[hadoop@hadoop002 hadoop-2.6.0-cdh6.7.0]$

*********************************************************

4.解压并配置hadoop

su - hadoop

cd app

tar -xzvf hadoop-2.6.0-cdh6.7.0.tar.gz


hadoop该怎么部署

cd  /home/hadoop/app/hadoop-2.6.0-cdh6.7.0/etc/hadoop

vi  core-site.xml

 

       fs.defaultFS

       hdfs://localhost:9000

   

vi hdfs-site.xml

       dfs.replication

       1

   

配置hadoop的环境变量，否则会在启动时候报错

vi /home/hadoop/app/hadoop-2.6.0-cdh6.7.0/etc/hadoop/hadoop-env.sh

export HADOOP_CONF_DIR=/home/hadoop/app/hadoop-2.6.0-cdh6.7.0/etc/hadoop

export JAVA_HOME=/usr/java/jdk1.8.0_45

*****************************

*****************************

5.配置ssh localhost无密码信任关系

su - hadoop

ssh-keygen  #一直回车

cd .ssh   #可以看到两个文件


hadoop该怎么部署

cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys  #生成authorized_keys信任文件

ssh localhost date

The authenticity of host 'localhost (127.0.0.1)' can't be established.

RSA key fingerprint is b1:94:33:ec:95:89:bf:06:3b:ef:30:2f:d7:8e:d2:4c.

Are you sure you want to continue connecting (yes/no)? yes

Warning: Permanently added 'localhost' (RSA) to the list of known hosts.

Wed Feb 13 22:41:17 CST 2019

chmod 600 authorized_keys   #非常重要，如果不更改权限，执行ssh localhost date时会让输入密码，但hadoop用户根本无密码，此时就是权限搞的猫腻。

**********************************

6.格式化

[hadoop@hadoop002 hadoop-2.6.0-cdh6.7.0]$ bin/hdfs namenode -format

***************************************

cd /home/hadoop/app/hadoop-2.6.0-cdh6.7.0

bin/hdfs namenode -format  #为何进入bin 再 hdfs namenode -format说找不到hdfs命令

***************************************

7.启动hadoop服务

[hadoop@hadoop002 hadoop-2.6.0-cdh6.7.0]$ sbin/start-dfs.sh

19/02/13 22:47:42 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable

Starting namenodes on [localhost]

localhost: starting namenode, logging to /home/hadoop/app/hadoop-2.6.0-cdh6.7.0/logs/hadoop-hadoop-namenode-hadoop002.out

localhost: starting datanode, logging to /home/hadoop/app/hadoop-2.6.0-cdh6.7.0/logs/hadoop-hadoop-datanode-hadoop002.out

Starting secondary namenodes [0.0.0.0]

The authenticity of host '0.0.0.0 (0.0.0.0)' can't be established.

RSA key fingerprint is b1:94:33:ec:95:89:bf:06:3b:ef:30:2f:d7:8e:d2:4c.

Are you sure you want to continue connecting (yes/no)? yes  #输入yes,,因为ssh 信任关系 是配置的是localhost，而非0.0.0.0

0.0.0.0: Warning: Permanently added '0.0.0.0' (RSA) to the list of known hosts.

0.0.0.0: starting secondarynamenode, logging to /home/hadoop/app/hadoop-2.6.0-cdh6.7.0/logs/hadoop-hadoop-secondarynamenode-hadoop002.out

19/02/13 22:49:47 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable

[hadoop@hadoop002 hadoop-2.6.0-cdh6.7.0]$

[hadoop@hadoop002 hadoop-2.6.0-cdh6.7.0]$ sbin/stop-dfs.sh

[hadoop@hadoop002 hadoop-2.6.0-cdh6.7.0]$ sbin/start-dfs.sh

19/02/13 22:57:23 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable

Starting namenodes on [localhost]

localhost: starting namenode, logging to /home/hadoop/app/hadoop-2.6.0-cdh6.7.0/logs/hadoop-hadoop-namenode-hadoop002.out

localhost: starting datanode, logging to /home/hadoop/app/hadoop-2.6.0-cdh6.7.0/logs/hadoop-hadoop-datanode-hadoop002.out

Starting secondary namenodes [0.0.0.0]

0.0.0.0: starting secondarynamenode, logging to /home/hadoop/app/hadoop-2.6.0-cdh6.7.0/logs/hadoop-hadoop-secondarynamenode-hadoop002.out

19/02/13 22:57:38 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable

[hadoop@hadoop002 hadoop-2.6.0-cdh6.7.0]$ jps  #检验是否正常启动，需启动以下四个服务

15059 Jps

14948 SecondaryNameNode 第二名称节点 老二

14783 DataNode  数据节点  小弟

14655 NameNode  名称节点  老大 读写

[hadoop@hadoop002 hadoop-2.6.0-cdh6.7.0]$

open http://ip:50070  #安装成功可以打开hadoop的web管理界面:如图


hadoop该怎么部署

8.配置hadoop命令环境变量

***************************************************************

[hadoop@hadoop002 hadoop-2.6.0-cdh6.7.0]$ cat ~/.bash_profile

# .bash_profile

# Get the aliases and functions

if [ -f ~/.bashrc ]; then

. ~/.bashrc

fi

# User specific environment and startup programs

export HADOOP_PREFIX=/home/hadoop/app/hadoop-2.6.0-cdh6.7.0

export PATH=$HADOOP_PREFIX/bin:$PATH

source ~/.bash_profile

/home/hadoop/app/hadoop-2.6.0-cdh6.7.0

***************************************************************

9.操作hadoop, hdfs dfs操作命令和Linux命令极其相似

[hadoop@hadoop002 hadoop-2.6.0-cdh6.7.0]$ bin/hdfs dfs -ls /

19/02/13 23:08:35 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable

[hadoop@hadoop002 hadoop-2.6.0-cdh6.7.0]$

[hadoop@hadoop002 hadoop-2.6.0-cdh6.7.0]$

[hadoop@hadoop002 hadoop-2.6.0-cdh6.7.0]$ bin/hdfs dfs -ls /

19/02/13 23:11:22 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable

[hadoop@hadoop002 hadoop-2.6.0-cdh6.7.0]$

[hadoop@hadoop002 hadoop-2.6.0-cdh6.7.0]$

[hadoop@hadoop002 hadoop-2.6.0-cdh6.7.0]$

[hadoop@hadoop002 hadoop-2.6.0-cdh6.7.0]$ ls /

bin   dev  home  lib64       media  opt   root  sbin     srv  tmp  var

boot  etc  lib   lost+found  mnt    proc  run   selinux  sys  usr

[hadoop@hadoop002 hadoop-2.6.0-cdh6.7.0]$

[hadoop@hadoop002 hadoop-2.6.0-cdh6.7.0]$

[hadoop@hadoop002 hadoop-2.6.0-cdh6.7.0]$ bin/hdfs dfs -mkdir /ruozedata

19/02/13 23:11:51 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable

[hadoop@hadoop002 hadoop-2.6.0-cdh6.7.0]$

[hadoop@hadoop002 hadoop-2.6.0-cdh6.7.0]$

[hadoop@hadoop002 hadoop-2.6.0-cdh6.7.0]$ bin/hdfs dfs -ls /

19/02/13 23:11:56 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable

Found 1 items

drwxr-xr-x   - hadoop supergroup          0 2019-02-13 23:11 /ruozedata

[hadoop@hadoop002 hadoop-2.6.0-cdh6.7.0]$

[hadoop@hadoop002 hadoop-2.6.0-cdh6.7.0]$

[hadoop@hadoop002 hadoop-2.6.0-cdh6.7.0]$

[hadoop@hadoop002 hadoop-2.6.0-cdh6.7.0]$ ls /

bin   dev  home  lib64       media  opt   root  sbin     srv  tmp  var

boot  etc  lib   lost+found  mnt    proc  run   selinux  sys  usr

[hadoop@hadoop002 hadoop-2.6.0-cdh6.7.0]$

10.查看帮助

[hadoop@hadoop002 hadoop-2.6.0-cdh6.7.0]$  bin/hdfs --help

作业:

1.ssh博客 阅读 摘抄

http://blog.itpub.net/30089851/viewspace-1992210/

http://blog.itpub.net/30089851/viewspace-2127102/

2.部署hdfs伪分布式

3.博客要写到hdfs伪分布式

小提示：

如果 su - zookeeper不能切换

解决方法：

更改：/etc/passwd中zookeeper用户的登录方式由/sbin/nologin==>/bin/bash即可

感谢各位的阅读，以上就是“hadoop该怎么部署”的内容了，经过本文的学习后，相信大家对hadoop该怎么部署这一问题有了更深刻的体会，具体使用情况还需要大家实践验证。这里是创新互联，小编将为大家推送更多相关知识点的文章，欢迎关注！


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