Ubuntu Server安装Apache HBase

安装完Hadoop之后急切有种想体验一下Apache HBase的操作，于是就有了这篇文章。

Linux环境

Linux :Ubuntu server 15.04

Welcome to Ubuntu 15.04 (GNU/Linux 3.19.0-15-generic x86_64)

* Documentation:  https://help.ubuntu.com/ Your Ubuntu release is not supported anymore.
For upgrade information, please visit: http://www.ubuntu.com/releaseendoflife 
New release '15.10' available.
Run 'do-release-upgrade' to upgrade to it.

JDK:确保已安装JDK

hduser@ubuntu:/$ java -version
java version "1.7.0_95"
OpenJDK Runtime Environment (IcedTea 2.6.4) (7u95-2.6.4-0ubuntu0.15.04.1)
OpenJDK 64-Bit Server VM (build 24.95-b01, mixed mode)
hduser@ubuntu:/$

下载HBase稳定版本1.2.x

http://ftp.wayne.edu/apache/hbase/

解压HBase文件

Last login: Tue Feb 14 20:22:43 2017 from 192.168.234.1
root@ubuntu:~# cd /usr/local
root@ubuntu:/usr/local# ls
bin  etc  games  hadoop  hbase-1.2.4-bin.tar.gz  include  lib  man  sbin  share  src  tomcat
root@ubuntu:/usr/local# tar zxf hbase-1.2.4-bin.tar.gz
root@ubuntu:/usr/local# ls
bin  etc  games  hadoop  hbase-1.2.4  hbase-1.2.4-bin.tar.gz  include  lib  man  sbin  share  src  tomcat
root@ubuntu:/usr/local#

分配HBase用户分组及操作权限

将文件名由/usr/local/hbase-1.2.4改为/usr/local/hbase，并为/usr/local/hbase分配hadoop分组的hduser用户下：

root@ubuntu:/usr/local# mv hbase-1.2.4 hbase
root@ubuntu:/usr/local# cd /
root@ubuntu:/# chown -R hduser:hadoop /usr/local/hbase
root@ubuntu:/# chmod 777 /usr/local/hbase/bin/*.sh
root@ubuntu:/#

修改HBase相关的配置文件

（1）配置hbase-env.sh，该文件在/usr/local/hbase/conf设置以下值：

#Java install home
export JAVA_HOME=/usr/lib/jvm/java-7-openjdk-amd64
# HBase class path
export HBASE_CLASSPATH=/usr/local/hbase/lib
#By HBase to control Zookeeper start or stop
export HBASE_MANAGES_ZK=true
# pids path -solve exception
export HBASE_PID_DIR=/home/hduser/pids

（2）配置hbase-site.xml，该文件位于/usr/local/hbase-1.2.4/conf

<configuration>

<property>
<name>hbase.master</name>
<value>master:6000</value>
</property>

<property>
<name>hbase.master.maxclockskew</name>
<value>180000</value>
</property>

<property>
<name>hbase.rootdir</name>
<value>hdfs://master:9000/hbase</value>
</property>

<property>
<name>hbase.cluster.distributed</name>
<value>true</value>
</property>

<property>
<name>hbase.zookeeper.quorum</name>
<value>master</value>
</property>

<property>
<name>hbase.zookeeper.property.dataDir</name>
<value>/home/${user.name}/tmp/zookeeper</value>
</property>

<property>
<name>dfs.replication</name>
<value>1</value>
</property>

</configuration>

属性说明：

hbase.master是指定运行HMaster的服务器及端口号；

hbase.master.maxclockskew是用来防止HBase节点之间时间不一致造成regionserver启动失败，默认值是30000；

hbase.rootdir指定HBase的存储目录；

hbase.cluster.distributed设置集群处于分布式模式；hbase.zookeeper.quorum设置Zookeeper节点的主机名，它的值个数必须是奇数；

hbase.zookeeper.property.dataDir设置Zookeeper的目录，默认为/tmp，dfs.replication设置数据备份数，集群节点小于3时需要修改，本次试验是一个节点，所以修改为1。

注：master需要设置/etc/hosts文件：127.0.0.1    master；设置完成后可以试一下是否设置成功



（3）配置regionservers，该文件位于/usr/local/hbase/conf设置所运行HBase的机器，此文件配置和hadoop中的slaves类似，一行指定一台机器，本次试验仅用一台机器，设置master即可,默认是：localhost。

（4）设置HBase环境变量，文件位于/etc/profile

在文件末尾添加：

#HBase Environment
export HBASE_HOME=/usr/local/hbase
export PATH=$PATH:$HBASE_HOME/bin

使修改生效：

source /etc/profile

第三步：运行测试

先启动Hadoop再启动HBase：

HBase Shell操作工具

进入命令窗口和帮助

HBase安装目录后执行bin/hbase shell，进入HBase shell交互模式，通过执行help命令，将输出一系列帮助信息如下：



输入help输出如下：

hbase(main):003:0> help
HBase Shell, version 1.2.4, r67592f3d062743907f8c5ae00dbbe1ae4f69e5af, Tue Oct 25 18:10:20 CDT 2016
Type 'help "COMMAND"', (e.g. 'help "get"' -- the quotes are necessary) for help on a specific command.
Commands are grouped. Type 'help "COMMAND_GROUP"', (e.g. 'help "general"') for help on a command group.

COMMAND GROUPS:
Group name: general
Commands: status, table_help, version, whoami

Group name: ddl
Commands: alter, alter_async, alter_status, create, describe, disable, disable_all, drop, drop_all, enable, enable_all, exists, get_table, is_disabled, is_enabled, list, locate_region, show_filters

Group name: namespace
Commands: alter_namespace, create_namespace, describe_namespace, drop_namespace, list_namespace, list_namespace_tables

Group name: dml
Commands: append, count, delete, deleteall, get, get_counter, get_splits, incr, put, scan, truncate, truncate_preserve

Group name: tools
Commands: assign, balance_switch, balancer, balancer_enabled, catalogjanitor_enabled, catalogjanitor_run, catalogjanitor_switch, close_region, compact, compact_rs, flush, major_compact, merge_region, move, normalize, normalizer_enabled, normalizer_switch, split, trace, unassign, wal_roll, zk_dump

Group name: replication
Commands: add_peer, append_peer_tableCFs, disable_peer, disable_table_replication, enable_peer, enable_table_replication, list_peers, list_replicated_tables, remove_peer, remove_peer_tableCFs, set_peer_tableCFs, show_peer_tableCFs

Group name: snapshots
Commands: clone_snapshot, delete_all_snapshot, delete_snapshot, list_snapshots, restore_snapshot, snapshot

Group name: configuration
Commands: update_all_config, update_config

Group name: quotas
Commands: list_quotas, set_quota

Group name: security
Commands: grant, list_security_capabilities, revoke, user_permission

Group name: procedures
Commands: abort_procedure, list_procedures

Group name: visibility labels
Commands: add_labels, clear_auths, get_auths, list_labels, set_auths, set_visibility

SHELL USAGE:
Quote all names in HBase Shell such as table and column names.  Commas delimit
command parameters.  Type <RETURN> after entering a command to run it.
Dictionaries of configuration used in the creation and alteration of tables are
Ruby Hashes. They look like this:

{'key1' => 'value1', 'key2' => 'value2', ...}

and are opened and closed with curley-braces.  Key/values are delimited by the
'=>' character combination.  Usually keys are predefined constants such as
NAME, VERSIONS, COMPRESSION, etc.  Constants do not need to be quoted.  Type
'Object.constants' to see a (messy) list of all constants in the environment.

If you are using binary keys or values and need to enter them in the shell, use
double-quote'd hexadecimal representation. For example:

hbase> get 't1', "key\x03\x3f\xcd"
hbase> get 't1', "key\003\023\011"
hbase> put 't1', "test\xef\xff", 'f1:', "\x01\x33\x40"

The HBase shell is the (J)Ruby IRB with the above HBase-specific commands added.
For more on the HBase Shell, see http://hbase.apache.org/book.html hbase(main):004:0>

HBase Shell 操作示例

hbase shell常用的操作命令有create,describe,disable,drop,list,scan,put,get,delete,deleteall,count,status等，通过help可以看到详细的用法。

1、打开Hbase shell

hduser@ubuntu:/usr/local/hbase$ hbase shell

2、查询表List

hbase(main):001:0> list

3、建表（create）

hbase(main):008:0> create 'scores','grad','course'

4、添加数据（表scores，rowkey为zkb 列族grad,列名为”” 值为5）

hbase(main):013:0> put 'scores','zkd','grade:','5'

5、 给zkb这一行的数据的列族course添加一列<math,97> (put)

hbase(main):016:0> put 'scores','zkd','course:math','97'

6、查询某一条数据(get)，根据rowkey查找

hbase(main):024:0> get 'scores','zkd'

7、查询多条数据(scan)

格式：scan命令可以指定startrow,stoprow来scan多个row，例如：scan 'user_test',{COLUMNS =>'info:username',LIMIT =>10, STARTROW  => 'test',STOPROW=>'test2'}, {}里边的是可选项

hbase(main):003:0> scan 'scores',{COLUMNS=>'course:art',LIMIT=>1,STARTROW=>'a',STOPROW=>'z'}

8、删除记录（只有一个column）

delete 'scores','1','course:art'

9、删除rowkey的所有column

deleteall 'scores','1'

10、删除scores表

hbase(main):004:0> disable 'scores'

hbase(main):005:0> drop 'scores'

注意：操作过程中可能会因为zookeeper报错：ERROR: Can't get master address from ZooKeeper; znode data == null。

错误原因：用户无法写入zookeeper文件，导致znode data为空。

解决方法：

(1)在hbase-site.xml指定一个运行hbase的用户有写入文件权限的目录作为zookeeper数据目录，如

<property>
<name>hbase.zookeeper.property.dataDir</name>
<value>/home/hduser/zookeeper</value>
</property>

（2）hbase-site.xml文件中的

<property>
<name>hbase.rootdir</name>
<value>hdfs://localhost:49002/hbase</value>
</property>

rootdir中的IP设定很重要，需要设定对应的IP与core-site.xml中fs.defaultFS中的路径不相同

<property>
<name>fs.defaultFS</name>
<value>hdfs://localhost:9000</value>
</property>

异常处理

HBase stop异常

stopping hbasecat: /tmp/hbase-mango-master.pid: No such file or directory

默认情况下pid文件保存在/tmp目录下，/tmp目录下的文件很容易丢失（重启后基本就会删除），解决办法：在hbase-env.sh中修改pid文件的存放路径

解决方法：

在hbase-env.sh中修改pid文件的存放路径创建用户的pids目录：

export HBASE_PID_DIR=/home/hduser/pids

命令生成：hbase-mango-master.pid文件

touch hbase-mango-master.pid

虚拟机内存不足

OpenJDK 64-Bit Server VM warning: INFO: os::commit_memory(0x00000000de530000, 10813440, 0) failed; error='Cannot allocate memory' (errno=12)

OpenJDK 64位服务器VM警告：无法分配内存。

关于本文配置文件的下载：HBase配置文件与HBase doc文档