接上篇:Hadoop3集群搭建之——虚拟机安装

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    Hadoop3集群搭建之——hive安装

    Hadoop3集群搭建之——hbase安装及简单操作

上篇已经安装好了虚拟机了,现在开始配置环境,安装hadoop

注:hadoop集群最少需要三台机,因为hdfs副本数最少为3,单机不算

  我搭了三台机

 

1、创建hadoop用户,hadoopgroup组  

groupadd -g 102 hadoopgroup  # 创建用户组

useradd -d /opt/hadoop -u 10201  -g 102  hadoop  #创建用户

passwd  hadoop  #给用户设置密码

2、安装ftp工具  

yum -y install vsftpd 
启动ftp:systemctl start vsftpd.service
停止ftp:systemctl stop vsftpd.service
重启ftp:systemctl restart vsftpd.service
[root@venn08 ~]# systemctl start vsftpd.service   # 启动,无提示信息
[root@venn08 ~]# ps -ef|grep vsft  #查看进程已存在,直接使用ftp工具连接
root       1257      1  0 09:41 ?        00:00:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
root       1266   1125  0 09:42 pts/0    00:00:00 grep --color=auto vsft
[root@venn08 ~]# systemctl restart vsftpd.service

注:使用vsftpd 安装后就可以使用系统用户作为ftp用户登录,选项同系统权限,不需要额外配置。

    

2、安装jdk、hadoop

  将下载的jdk、hadoop拷贝到服务器上,解压,修改目录名  

[hadoop@venn05 ~]$ pwd
/opt/hadoop
[hadoop@venn05 ~]$ ll
drwxr-xr-x. 11 hadoop hadoopgroup       172 Apr  3 20:49 hadoop3
-rw-r--r--.  1 hadoop hadoopgroup 307606299 Apr  2 22:30 hadoop-3.0.1.tar.gz
drwxr-xr-x.  8 hadoop hadoopgroup       255 Apr  1  2016 jdk1.8
-rw-r--r--.  1 hadoop hadoopgroup 181367942 May 26  2016 jdk-8u91-linux-x64.tar.gz

修改目录名,是为了方便书写

 

3、配置Java、hadoop环境变量

  在最后添加Java、hadoop环境变量,注意路径不要写错即可

[hadoop@venn05 ~]$ vim .bashrc 
[hadoop@venn05 ~]$ more .bashrc 
# .bashrc

# Source global definitions
if [ -f /etc/bashrc ]; then
    . /etc/bashrc
fi

# Uncomment the following line if you don't like systemctl's auto-paging feature:
# export SYSTEMD_PAGER=

# User specific aliases and functions
#jdk
export JAVA_HOME=/opt/hadoop/jdk1.8
export JRE_HOME=${JAVA_HOME}/jre
export CLASS_PATH=${JAVA_HOME}/lib:${JRE_HOME}/lib
export PATH=${JAVA_HOME}/bin:$PATH


#hadoop
export HADOOP_HOME=/opt/hadoop/hadoop3
export PATH=$HADOOP_HOME/bin:$HADOOP_HOME/sbin:$PATH

 

4、切换root用户,修改各机/etc/hosts

[root@venn05 hadoop]# vim /etc/hosts
[root@venn05 hadoop]# more /etc/hosts
127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.1.5 venn05
192.168.1.6 venn06
192.168.1.7 venn07

  其他几台机操作相同

5、创建ssh密钥  

[hadoop@venn08 ~]$ mkdir .ssh  # 创建.ssh 目录
[hadoop@venn08 ~]$ cd .ssh/
[hadoop@venn08 .ssh]$ ls
[hadoop@venn08 .ssh]$ pwd
/opt/hadoop/.ssh
[hadoop@venn08 .ssh]$ ssh-keygen -t rsa  # 创建ssh秘钥,一路回车下去
Generating public/private rsa key pair.
Enter file in which to save the key (/opt/hadoop/.ssh/id_rsa): 
Enter passphrase (empty for no passphrase): 
Enter same passphrase again: 
Your identification has been saved in /opt/hadoop/.ssh/id_rsa.
Your public key has been saved in /opt/hadoop/.ssh/id_rsa.pub.
The key fingerprint is:
SHA256:rrlJxkA6o4eKwDKWjbx5CgyH+9EzbUiyfFHnJzgTL5w hadoop@venn08
The key's randomart image is:
+---[RSA 2048]----+
|                 |
|                 |
|    . o .        |
| . o o B         |
|o * + E S .      |
|=*+B * = o       |
|OB=.* * .        |
|B+o+ * +         |
|o++   =.         |
+----[SHA256]-----+
[hadoop@venn08 .ssh]$ ll  # 查看
total 8
-rw-------. 1 hadoop hadoopgroup 1679 Apr 24 10:17 id_rsa   # 私钥,本机保存
-rw-r--r--. 1 hadoop hadoopgroup  395 Apr 24 10:17 id_rsa.pub  #公钥,复制到其他机器

每台机都执行以上步骤,创建 ssh 密钥

6、合并每台机器的公钥,放到每台机器上 

Venn05 :
    复制公钥到文件 :  cat id_rsa.pub >>  authorized_keys
    拷贝到 venn 06  :   scp authorized_keys hadoop@venn06:~/.ssh/authorized_keys
    
Venn 06 :
    拷贝venn06的公钥到 authorized_keys : cat id_rsa.pub >>  authorized_keys 
    拷贝到 venn07 :  scp authorized_keys hadoop@venn07:~/.ssh/authorized_keys
    
Venn07 :
    复制公钥到文件 :  cat id_rsa.pub >>  authorized_keys
    拷贝到 venn 05  :   scp authorized_keys hadoop@venn05:~/.ssh/authorized_keys
    拷贝到 venn 06  :   scp authorized_keys hadoop@venn05:~/.ssh/authorized_keys

多机类推

至此,配置完成,现在各机hadoop用户可以免密登录。

7、修改 hadoop环境配置:hadoop-env.sh

  进入路径: /opt/hadoop/hadoop3/etc/hadoop,打开 hadoop-env.sh 修改:  

export JAVA_HOME=/opt/hadoop/jdk1.8  # 执行jdk

 

8、修改hadoop核心配置文件 : core-site.sh ,添加如下内容  

<configuration>
<!--hdfs临时路径-->
<property>
    <name>hadoop.tmp.dir</name>
    <value>/opt/hadoop/hadoop3/tmp</value>
</property>
<!--hdfs 的默认地址、端口 访问地址-->
<property>
    <name>fs.defaultFS</name>
    <value>hdfs://venn05:8020</value>
</property>
</configuration>

9、修改yarn-site.sh ,添加如下内容 

<configuration>

<!-- Site specific YARN configuration properties -->
<!--集群master,-->
<property>
    <name>yarn.resourcemanager.hostname</name>
    <value>venn05</value>
</property>

<!-- NodeManager上运行的附属服务-->
<property>
    <name>yarn.nodemanager.aux-services</name>
    <value>mapreduce_shuffle</value>
</property>
<!--容器可能会覆盖的环境变量,而不是使用NodeManager的默认值-->
<property>
        <name>yarn.nodemanager.env-whitelist</name>
    <value> JAVA_HOME,HADOOP_COMMON_HOME,HADOOP_HDFS_HOME,HADOOP_CONF_DIR,CLASSPATH_PREPEND_DISTCACHE,HADOOP_YARN_HOME,HADOOP_HOME,PATH,LANG,TZ</value>
</property>
<!-- 关闭内存检测,虚拟机需要,不配会报错-->
<property>
    <name>yarn.nodemanager.vmem-check-enabled</name>
    <value>false</value>
</property>

</configuration>

10、修改mapred-site.xml  ,添加如下内容

<configuration>
<!--local表示本地运行,classic表示经典mapreduce框架,yarn表示新的框架-->
<property>
    <name>mapreduce.framework.name</name>
    <value>yarn</value>
</property>
<!--如果map和reduce任务访问本地库(压缩等),则必须保留原始值
当此值为空时,设置执行环境的命令将取决于操作系统:
Linux:LD_LIBRARY_PATH=$HADOOP_COMMON_HOME/lib/native.
windows:PATH =%PATH%;%HADOOP_COMMON_HOME%\\bin.
-->
<property>
        <name>mapreduce.admin.user.env</name>
        <value>HADOOP_MAPRED_HOME=/opt/hadoop/hadoop3</value>
</property>
<!--
可以设置AM【AppMaster】端的环境变量
如果上面缺少配置,可能会造成mapreduce失败
-->
<property>
        <name>yarn.app.mapreduce.am.env</name>
        <value>HADOOP_MAPRED_HOME=/opt/hadoop/hadoop3</value>
</property>

</configuration>

11、修改hdfs-site.xml ,添加如下内容

<configuration>
<!--hdfs web的地址 -->
<property>
    <name>dfs.namenode.http-address</name>
    <value>venn05:50070</value> 
</property>
<!-- 副本数-->
<property>
        <name>dfs.replication</name>
        <value>3</value>
    </property>
<!-- 是否启用hdfs权限检查 false 关闭 -->
       <property>
        <name>dfs.permissions.enabled</name>
        <value>false</value>
    </property>
<!-- 块大小,默认字节, 可使用 k m g t p e-->
       <property>
        <name>dfs.blocksize</name>
    <!--128m-->
        <value>134217728</value>
    </property>

</configuration>

12、修workers 文件

[hadoop@venn05 hadoop]$ more workers 
venn05  # 第一个为master
venn06
venn07

至此,hadoop master配置完成

13、scp  .bashrc 、jdk 、hadoop到各个节点

  进入hadoop home目录 cd ~


scp -r .bashrc jdk1.8 hadoop3 hadoop@192.168.1.8:/opt/hadoop/

 

至此hadoop集群搭建完成。

 

14、启动hadoop:

  格式化命名空间:    

hdfs namenode –format # 如果不行就用 hadoop namenode -format

启动集群:  

start-all.sh

输出:  

[hadoop@venn05 ~]$ start-all.sh 
WARNING: Attempting to start all Apache Hadoop daemons as hadoop in 10 seconds.
WARNING: This is not a recommended production deployment configuration.
WARNING: Use CTRL-C to abort.
Starting namenodes on [venn05]
Starting datanodes
Starting secondary namenodes [venn05]
Starting resourcemanager
Starting nodemanagers

jps 查看进程:

[hadoop@venn05 ~]$ jps
5904 Jps
5733 NodeManager
4871 NameNode
5431 ResourceManager
5211 SecondaryNameNode
[hadoop@venn05 ~]$

查看其它节点状态:

[hadoop@venn06 hadoop]$ jps
3093 NodeManager
3226 Jps
2973 DataNode

hadoop启动成功

查看yarn web 控制台:  

http://venn05:8088/cluster

查看 hdfs web 控制台:

http://venn05:50070/dfshealth.html#tab-overview

 

 

搞完收工,明天继续写ntp 和搭建过程中遇到的坑

 

接上篇:Hadoop3集群搭建之——虚拟机安装

  下篇:Hadoop3集群搭建之——配置ntp服务

  Hadoop3集群搭建之——hbase安装及简单操作

 

posted on 2018-04-24 21:56  Flink菜鸟  阅读(11834)  评论(0编辑  收藏  举报