Hbase伪分布式搭建

搭建环境

• CentOS Linux release 7.4.1708 (Core)
• Hbase 2.3.4

一、伪分布式搭建

Hbase 自带web页面（重点是端口）： http://192.168.75.138:16010/

0.配置免密登录

免密登录给本机和需要连接服务器都配置免密登录

* 生成私钥和公钥命令（在任意目录执行）
# ssh-keygen

# 出现下面的信息，按三次回车即可
----------------显示-------------------
[root@hbase-139 .ssh]# ssh-keygen
Generating public/private rsa key pair.
Enter file in which to save the key (/root/.ssh/id_rsa): 
Enter passphrase (empty for no passphrase): 
Enter same passphrase again: 
Your identification has been saved in /root/.ssh/id_rsa.
Your public key has been saved in /root/.ssh/id_rsa.pub.
The key fingerprint is:
SHA256:HgHxi2cQ2vdxwN74vPuLMttGsDAK8RVb3KkOavT6XWs root@hbase-139
The key's randomart image is:
+---[RSA 2048]----+
|      +..+o. .   |
|    .o +.oo.o    |
|    .oo.=..+.    |
|    . o+++=o.    |
|     o.+S=.=     |
|      ++..o +    |
|     . ..  ...   |
|      .  .ooEo   |
|       .. o*=oo. |
+----[SHA256]-----+

------------------执行完上面的命令，会在/root/.ssh目录下生成公钥和私钥----------------------

# cd /root/.ssh

* 输入要免密登录的服务器ip
# ssh-copy-id 192.168.75.139

* 输入yes，然后再输入连接服务器的密码
-----------------显示-----------------
[root@hbase-139 .ssh]# ssh-copy-id 192.168.75.139
/usr/bin/ssh-copy-id: INFO: Source of key(s) to be installed: "/root/.ssh/id_rsa.pub"
The authenticity of host '192.168.75.139 (192.168.75.139)' can't be established.
ECDSA key fingerprint is SHA256:bdCj1PkE+gCBkoRq1pqA3IwNK0LqIY+eRyJmt1aooAk.
ECDSA key fingerprint is MD5:c8:4e:68:04:60:bd:50:ef:91:a2:5c:35:79:37:16:f9.
Are you sure you want to continue connecting (yes/no)? yes
/usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed
/usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys
root@192.168.75.139's password: 

Number of key(s) added: 1

Now try logging into the machine, with:   "ssh '192.168.75.139'"
and check to make sure that only the key(s) you wanted were added.

------------------执行完上面的命令，会在连接的服务器/root/.ssh目录下生成authorized_keys文件-------------------------
------------------authorized_keys和公钥的内容一样-----

* 至此，可以直接登录到设置了免密登录的服务器，而不用输入密码

1.安装Hbase

# tar -zxvf hbase-2.3.4-bin.tar.gz

# cd hbase-2.3.4

2.hbase-env.sh

# vi conf/hbase-env.sh

--------------加入下面的配置------------------
export JAVA_HOME=/opt/jdk/jdk1.8.0_112

3.hbase-site.xml

# vi conf/hbase-site.xml

------------------选择1：如果不连接HDFS修改为true即可，其他默认-------------------
<property>
    <name>hbase.cluster.distributed</name>
    <value>true</value>
</property>


------------------选择2：如果连接HDFS-------------------
  <property>
    <name>hbase.cluster.distributed</name>
    <value>true</value>
  </property>
  <!--
  <property>
    <name>hbase.tmp.dir</name>
    <value>./tmp</value>
  </property>
  -->
  <property>
  <name>hbase.rootdir</name>
  <value>hdfs://hadoop-1:9000/hbase</value>
  </property>

如果要连接HDFS请参考Hadoop伪分布式搭建： https://blog.youkuaiyun.com/Wen__Fei/article/details/116269138

4.ip映射

# vi /etc/hosts

192.168.75.138  hbase-1
192.168.75.139  hadoop-1

5.启动

# ./bin/start-hbase.sh

6.检查

如果没有连接HDFS可以忽略下面这个操作

* 如果一切正常，则HBase将在HDFS中创建其目录。（在hadoop根目录使用下面的命令）

# ./bin/hadoop fs -ls /hbase

ps：

经过上面的步骤，一个供测试使用的伪分布式就搭建起来了，可以使用Hbase shell对Hbase进行DDL等操作，也可以使用Java客户端连接Hbase，对Hbase进行操作。bye~