obproxy的安装、配置和使用

接上一篇文章OceanBase 1.4 集群手动安装步骤，继续开始OceanBase 1.4集群的学习。

一步一步学习OceanBase系列 本篇是第二篇 安装和配置obproxy，使用obproxy连接ob集群

五、安装和配置obproxy

OceanBase是分布式数据库，应用的数据可能分布在任一节点上并且不固定，所以应用不可能知道数据在哪个节点或者记录所有节点IP。
这时就需要一个反向代理OBProxy在OceanBase集群前面提供SQL路由功能。应用通过OBProxy访问OceanBase集群，OBProxy就是数据库的代表。


5.1.创建OBProxy专用用户

OBProxy需要跟OceanBase集群保持通信，所以需要在sys租户里提前创建好账户。
登录sys租户创建obproxy的内部用户(请复制下面SQL不要改动)。

$ mysql -h127.1 -uroot@sys -P2881 -p -A
Enter password: 
Welcome to the MariaDB monitor.  Commands end with ; or \g.
Your MySQL connection id is 2147549195
Server version: 5.6.25 OceanBase 1.4.60 (r1571952-758a58e85846f9efb907b1c14057204cb6353846) (Built Mar  9 2018 14:32:07)

Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

MySQL [(none)]> CREATE USER proxyro IDENTIFIED BY password '*e9c2bcdc178a99b7b08dd25db58ded2ee5bff050' ;
Query OK, 0 rows affected (0.01 sec)

MySQL [(none)]> GRANT SELECT ON *.* to proxyro;
Query OK, 0 rows affected (0.01 sec)

MySQL [(none)]> show grants for proxyro;
+----------------------------------+
| Grants for proxyro               |
+----------------------------------+
| GRANT SELECT ON *.* TO 'proxyro' |
+----------------------------------+
1 row in set (0.00 sec)

MySQL [(none)]> 


5.2.安装OBProxy的软件

root用户安装RPM包，默认obproxy安装目录在/opt/taobao/install 下。

# rpm -ivh obproxy-1.3.3-1506155.el7.x86_64.rpm
# chown -R admin:admin /opt/taobao
# tree /opt
/opt
└── taobao
    └── install
        └── obproxy
            ├── bin
            │   ├── obproxy
            │   ├── obproxyd.sh
            │   ├── obp_xflush.py
            │   └── unzip.py
            ├── etc
            ├── log -> /home/admin/logs/obproxy/log
            ├── minidump -> /home/admin/logs/obproxy/minidump
            └── tools
                ├── dump_syms
                ├── minidump.sh
                ├── minidump_stackwalk
                └── obproxy.sym

6 directories, 10 files
#



5.3.admin用户，启动OBProxy

OBProxy启动跟OBServer启动类似

注意：
其中 -r指定的是rootservice list地址，格式稍微不同，不需要RPC Port信息，只需要observer inner_port。-p指定OBProxy的监听端口。 -c指定ob集群名称

# su - admin
$ cd /opt/taobao/install/obproxy 
$ bin/obproxy -r "192.168.0.151:2881;192.168.0.43:2881;192.168.0.41:2881" -p 2883 -o "enable_strict_kernel_release=false,enable_cluster_checkout=false" -c obdemo
listen port: 2883
optstr: enable_strict_kernel_release=false,enable_cluster_checkout=false
cluster_name: obdemo
$
$ ps -ef|grep obproxy
admin    22122     1  2 11:51 ?        00:00:00 bin/obproxy -r 192.168.0.151:2881;192.168.0.43:2881;192.168.0.41:2881 -p 2883 -o enable_strict_kernel_release=false,enable_cluster_checkout=false -c obdemo
admin    22134  9410  0 11:52 pts/0    00:00:00 grep --color=auto obproxy
$


5.4.配置obproxy参数
$ mysql -h192.168.0.151 -uroot@sys#obdemo -P2883 -p -c -A oceanbase
Enter password:
下面是obproxy的一些参数配置用于减少运行日志量，根据实际情况修改。

show proxyconfig like '%compress%';

alter proxyconfig set enable_metadb_used=False;
alter proxyconfig set enable_proxy_scramble=True;
alter proxyconfig set proxy_mem_limited=2G;
alter proxyconfig set log_dir_size_threshold=10G;
alter proxyconfig set slow_proxy_process_time_threshold='1000ms';
alter proxyconfig set xflush_log_level=ERROR;
alter proxyconfig set syslog_level=WARN;
alter proxyconfig set enable_compression_protocol=false;



5.5.使用OBProxy连接ob集群

通过OBProxy连接OceanBase集群的命令有两种格式，区别在于用户名的格式。如：[用户名]@[租户名]#[集群名] 或 [集群名]:[租户名]:[用户名]。
mysql -h192.168.0.151 -uroot@sys#obdemo -P2883 -padmin123 -c -A oceanbase
或
mysql -h192.168.0.151 -uobdemo:sys:root -P2883 -padmin123 -c -A oceanbase

示例：
$ mysql -h192.168.0.151 -uroot@sys#obdemo -P2883 -padmin123 -c -A oceanbase
Welcome to the MariaDB monitor.  Commands end with ; or \g.
Your MySQL connection id is 1048578
Server version: 5.6.25 OceanBase 1.4.60 (r1571952-758a58e85846f9efb907b1c14057204cb6353846) (Built Mar  9 2018 14:32:07)

Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

MySQL [oceanbase]> select version();
+-----------+
| version() |
+-----------+
| 1.4.60    |
+-----------+
1 row in set (0.00 sec)

MySQL [oceanbase]> show databases;
+--------------------+
| Database           |
+--------------------+
| oceanbase          |
| information_schema |
| mysql              |
| test               |
+--------------------+
4 rows in set (0.00 sec)

MySQL [oceanbase]> exit
Bye
$
$ mysql -h192.168.0.151 -uobdemo:sys:root -P2883 -padmin123 -c -A oceanbase
Welcome to the MariaDB monitor.  Commands end with ; or \g.
Your MySQL connection id is 1048579
Server version: 5.6.25 OceanBase 1.4.60 (r1571952-758a58e85846f9efb907b1c14057204cb6353846) (Built Mar  9 2018 14:32:07)

Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

MySQL [oceanbase]> select version();
+-----------+
| version() |
+-----------+
| 1.4.60    |
+-----------+
1 row in set (0.00 sec)

MySQL [oceanbase]> show databases;
+--------------------+
| Database           |
+--------------------+
| oceanbase          |
| information_schema |
| mysql              |
| test               |
+--------------------+
4 rows in set (0.00 sec)

MySQL [oceanbase]> exit
Bye
$ 


本次obproxy的安装配置使用，到此结束。

一步一步学习OceanBase系列

下一篇准备体验ob集群的租户使用。。

下次实操继续更新~~~~~

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