实践练习一：OceanBase Docker 体验

1.拉取和运行OceanBase CE 容器

docker pull obpilot/oceanbase-ce:latest 

docker run -itd -m 10G --name oceanbase-ce  obpilot/oceanbase-ce:latest

2.启动集群

obd cluster start test

遇到以下两个报错
[ERROR] (127.0.0.1) open files number must not be less than 20000 (Current value: 1024)
[ERROR] (127.0.0.1) not enough memory. (Free: 6.7G, Need: 8.0G)
一个是用户最大打开文件数不够，一个是可用内存不足8G，解决后成功启动。

3.创建租户

MySQL [cctest]> alter resource unit sys_unit_config min_cpu=5;
Query OK, 0 rows affected (0.006 sec)

MySQL [cctest]>  CREATE resource unit S4C1G max_cpu=4, min_cpu=4, max_memory='1G', min_memory='1G', max_iops=10000, min_iops=1000, max_session_num=1000000, max_disk_size='1024G';
Query OK, 0 rows affected (0.016 sec)
MySQL [cctest]> CREATE resource pool my_pool unit = 'S4C1G', unit_num = 1;
Query OK, 0 rows affected (0.023 sec)
MySQL [cctest]> create tenant obmysql resource_pool_list=('my_pool'), primary_zone='RANDOM',comment 'mysql tenant/instance', charset='utf8' set ob_tcp_invited_nodes='%', ob_compatibility_mode='mysql';
Query OK, 0 rows affected (1.121 sec)

4.创建数据库表

Welcome to the OceanBase.  Commands end with ; or \g.
Your MySQL connection id is 3221487724
Server version: 5.7.25 OceanBase 3.1.2 (r10000392021123010-d4ace121deae5b81d8f0b40afbc4c02705b7fc1d) (Built Dec 30 2021 02:47:29)

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)]> show databases;
+--------------------+
| Database           |
+--------------------+
| oceanbase          |
| information_schema |
| mysql              |
| test               |
+--------------------+
4 rows in set (0.002 sec)

MySQL [(none)]> create database cctest;
Query OK, 1 row affected (0.023 sec)

MySQL [(none)]>  CREATE TABLE cctest (id int,cc varchar(20));
ERROR 1046 (3D000): No database selected
MySQL [(none)]> use cctest
Database changed
MySQL [cctest]>  CREATE TABLE cctest (id int,cc varchar(20));
Query OK, 0 rows affected (0.045 sec)

MySQL [cctest]>  insert into cctest(id,cc) values(1,"test");
Query OK, 1 row affected (0.012 sec)