OceanBase | 试用版安装初体验

我不是女神ヾ 2022-11-21 04:05 392阅读 0赞

> 使用部署脚本在 Linux 平台上部署 OceanBase 试用版

OceanBase官网提供了试用版产品包，对于一直想学习OceanBase的同学来说是一大福音，本文将对试用版的安装做一个记录。

试用版本可以通过脚本部署安装，也可使用使用 docker 镜像进行安装，本片介绍前者内容，也就是在 Linux 上使用提供的部署脚本安装。

在服务器的配置上，使用版本没有对数量上的要求，我们可以使用1台测试机进行安装部署，一般的虚机环境就可以搞定。

*  操作系统：CentOS 6 或 CentOS 7
 *  内存：8G
 *  磁盘：20G

# **01 准备工作** #

**资源下载**

在OceanBase的官网即可完成试用版OB的下载（需注册），产品包名为mini-ob-deploy.tar，大小为79.3M。

官网下载地址：

https://www.oceanbase.com/download

![0e1440da2494955506bf345be2faf3b1.png][]

**检查系统**

这里使用CentOS7.6作为部署环境，内存为8G，系统剩余存储空间在60G。

**系统内核**

[root@tank ~]# uname -a
    Linux gs01 3.10.0-957.el7.x86_64 #1 SMP Thu Nov 8 23:39:32 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

**内存空间**

[root@tank ~]# free -g
                  total        used        free      shared  buff/cache   available
    Mem:              7           0           6           0           0           6
    Swap:             7           0           7

**磁盘空间**

[root@tank ~]# df -h
    Filesystem      Size  Used Avail Use% Mounted on
    /dev/sda3        80G   20G   61G  25% /
    devtmpfs        3.8G     0  3.8G   0% /dev
    tmpfs           3.9G     0  3.9G   0% /dev/shm
    tmpfs           3.9G   13M  3.8G   1% /run
    tmpfs           3.9G     0  3.9G   0% /sys/fs/cgroup
    /dev/sda1       497M  167M  330M  34% /boot
    tmpfs           781M  4.0K  781M   1% /run/user/42
    tmpfs           781M   48K  781M   1% /run/user/0

**iptables策略**

[root@tank ~]# iptables -L
    Chain INPUT (policy ACCEPT)
    target     prot opt source               destination         
    
    Chain FORWARD (policy ACCEPT)
    target     prot opt source               destination         
    
    Chain OUTPUT (policy ACCEPT)
    target     prot opt source               destination         
    [root@tank ~]#

**创建用户**

这里参照在线手册的规范，创建admin用户。

[root@tank ~]# useradd admin
    [root@tank ~]# passwd admin

**创建工作路径**

[root@tank ~]# mkdir /ob
    [root@tank ~]# chown admin:admin /ob

# **02 安装** #

首先切换至admin用户，对安装包进行解包。

[root@tank ~]# su - admin
    Last login: Tue Oct 27 21:21:44 CST 2020 on pts/0
    [admin@tank ~]$  ll
    total 81268
    -rw-r--r-- 1 admin admin 83216182 Oct 27 21:21 mini-ob-deploy.tar
    [admin@tank ~]$  tar xvf mini-ob-deploy.tar
    [admin@tank ~]$  ll
    total 81272
    drwxr-xr-x 11 admin admin     4096 Aug 20 11:39 mini-ob-deploy
    -rw-r--r--  1 admin admin 83216182 Oct 27 21:21 mini-ob-deploy.tar
    [admin@tank ~]$  cd mini-ob-deploy
    [admin@tank mini-ob-deploy]$  pwd
    /home/admin/mini-ob-deploy
    [admin@tank mini-ob-deploy]$  ll
    total 3764
    drwxr-xr-x 2 admin admin      27 Aug 20 11:36 b
    drwxr-xr-x 2 admin admin      22 Aug 20 11:38 bin
    -rw-r--r-- 1 admin admin     501 Aug 20 11:36 config.py
    -rw-r--r-- 1 admin admin     305 Aug 20 11:36 deploy.dockerfile
    -rw-r--r-- 1 admin admin     606 Aug 20 11:36 features.md
    drwxr-xr-x 2 admin admin     114 Aug 20 11:36 h
    -rwxr-xr-x 1 admin admin  276599 Aug 20 11:36 hap.py
    -rw-r--r-- 1 admin admin    2835 Aug 20 11:36 init.sql
    -rw-r--r-- 1 admin admin     342 Aug 20 11:36 init_user_oracle.sql
    -rw-r--r-- 1 admin admin     295 Aug 20 11:36 init_user.sql
    drwxr-xr-x 2 admin admin      95 Aug 20 11:36 install
    drwxr-xr-x 2 admin admin      53 Aug 20 11:36 lib
    -rw-r--r-- 1 admin admin     560 Aug 20 11:36 Makefile
    -rwxr-xr-x 1 admin admin 3539416 Aug 20 11:36 mysql
    drwxr-xr-x 2 admin admin     163 Aug 20 11:40 mysql_example
    drwxr-xr-x 2 admin admin     207 Aug 20 11:36 oracle_example
    -rw-r--r-- 1 admin admin     960 Aug 20 11:39 README.md
    drwxr-xr-x 4 admin admin      30 Aug 20 11:36 sysbench

在config.py文件中确认默认配置，需要注意“home”参数所对应路径的权限。

执行命令之后会启动一个单 server 的 OceanBase 集群，默认 MySQL 端口号为 2881，rpc 端口号为 2882。

[admin@tank mini-ob-deploy]$ cat config.py 
    load('obi,obt-patch,mini-mode,sample-db,sysbench')
    if not indocker():
        home = '/ob'
    obs_cfg.update(mini_mode_cfg)
    obs_cfg.update(system_memory='5G', memory_limit='8G', datafile_size='10G')
    
    # 定义一个单server的ob集群，mysql端口号2881，rpc端口号2882
    ob1 = OBI('127.0.0.1:2882:2881')
    # 定义另一个单server的ob集群，mysql端口号/rpc端口号由uid hash生成
    ob2 = OBI('127.0.0.1')
    # 单个机器上起3个observer
    ob3 = OBI('127.0.0.1@[z1,z2,z3]', dev='lo', is_local=True)
    [admin@tank mini-ob-deploy]$

接下来通过脚本初始化OceanBase实例，时间在1分钟左右。如反复提示连接拒绝，请确认iptables是否被清空。

[admin@tank mini-ob-deploy]$  ./hap.py ob1.reboot
    2020-10-27 21:39:04.419072 call.py:3 CALL: top make_local_etc_dir
    2020-10-27 21:39:04.452645 call.py:3 CALL: top ob1.reboot
    2020-10-27 21:39:04.457306 call.py:3 CALL: top.ob1 local_reboot
    2020-10-27 21:39:04.465673 call.py:3 CALL: top.ob1 force_stop
    2020-10-27 21:39:04.472002 call.py:3 CALL: top.ob1 stop
    2020-10-27 21:39:04.481572 call.py:3 CALL: top.ob1 all_server
    2020-10-27 21:39:04.490331 call.py:3 CALL: top.ob1.obs0 stop
    2020-10-27 21:39:04.506482 magic_ctrl.py:3 retry_loop: retryloop: timeout=10 interval = 0.1
    2020-10-27 21:39:04.516732 magic_ctrl.py:6 retry_loop: #### tryloop try_stop ####
    2020-10-27 21:39:04.531343 call.py:3 CALL: top.ob1.obs0 try_stop
    12445
    2020-10-27 21:39:04.575025 magic_ctrl.py:12 retry_loop: tryloop fail: Fail: shell fail: if pgrep -u admin -f '^/ob/ob1.obs0/bin/'; then  pkill -9 -u admin -f '^/ob/ob1.obs0/bin/' && false; fi input=None ret=1 
    2020-10-27 21:39:04.686865 magic_ctrl.py:6 retry_loop: #### tryloop try_stop ####
    2020-10-27 21:39:04.714658 call.py:3 CALL: top.ob1.obs0 try_stop
    2020-10-27 21:39:04.770073 magic_ctrl.py:9 retry_loop: #### tryloop success ####
    2020-10-27 21:39:04.783420 call.py:3 CALL: top.ob1 sleep
    ***中间过程省略***
    2020-10-27 21:39:41.450288 magic_ctrl.py:9 retry_loop: #### tryloop success ####
    2020-10-27 21:39:41.456057 call.py:3 CALL: top.ob1 exec_init_sql
    2020-10-27 21:39:41.463690 call.py:3 CALL: top.ob1 obs0.sql
    2020-10-27 21:39:55.535108 call.py:3 CALL: top.ob1 add_server
    2020-10-27 21:39:55.545867 call.py:3 CALL: top.ob1 all_obs
    2020-10-27 21:39:55.558274 call.py:3 CALL: top.ob1 exec_init_user_sql1
    2020-10-27 21:39:55.566954 call.py:3 CALL: top.ob1 exec_init_user_sql2
    2020-10-27 21:39:55.576170 call.py:3 CALL: top.ob1 obs0.mysql
    2020-10-27 21:39:55.813021 call.py:3 CALL: top.ob1 start_proxy
    2020-10-27 21:39:55.848355 call.py:3 CALL: top.ob1 all_proxy
    2020-10-27 21:39:55.857583 call.py:3 CALL: top.ob1 check_bootstrap
    2020-10-27 21:39:55.864445 call.py:3 CALL: top.ob1 obs0.check_bootstrap
    [('force_stop', [('obs0.stop', 'succ')]),
     ('sleep', None),
     ('cleanup', [('obs0.rmdir', 0)]),
     ('mk_local_dir', 0),
     ('mkdir', [('obs0.mkdir', 0)]),
     ('local_sync', [('obs0.local_sync', 0)]),
     ('prepare_proxy_cfg', 'skip'),
     ('start_servers', [('obs0.start', 0)]),
     ('bootstrap', 'succ'),
     ('post_bootstrap', None),
     ('wait_service', 'succ'),
     ('exec_init_sql', 0),
     ('add_server', []),
     ('exec_init_user_sql1', 'skip'),
     ('exec_init_user_sql2', 0),
     ('start_proxy', []),
     ('check_bootstrap', 0)]

如果输出内容和上述内容一致，那么到这里已经初试化完成了。

如果 2881/2882 端口被占用, 可以修改 config.py 中如下这一行。

ob1 = OBI('127.0.0.1:2882:2881')

初始化 OceanBase 实例成功之后，会自动创建两个租户，sys 租户和一个普通的 mysql 租户。

# 03 验证 #

按照如下方式来通过 MySQL 客户端连接 OceanBase 数据库。

[admin@tank mini-ob-deploy]$  ./hap.py ob1.obmysql
    2020-10-27 21:53:44.664389 call.py:3 CALL: top make_local_etc_dir
    2020-10-27 21:53:44.689985 call.py:3 CALL: top ob1.obmysql
    2020-10-27 21:53:44.694479 call.py:3 CALL: top.ob1 sql
    2020-10-27 21:53:44.698630 call.py:3 CALL: top.ob1 obs0.sql
    Reading table information for completion of table and column names
    You can turn off this feature to get a quicker startup with -A
    
    Welcome to the MariaDB monitor.  Commands end with ; or \g.
    Your MySQL connection id is 3221491363
    Server version: 5.7.25 OceanBase 2.2.50 (r1-1c6441e8fb858c80da395f934f67ed305425864e) (Built Mar  6 2020 18:41:01)
    
    Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.
    
    Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
    
    OceanBase(root@oceanbase)>

**创建、查看数据库**

**查询当前数据库版本**

OceanBase(root@tank)>select version();
    +-----------+
    | version() |
    +-----------+
    | 2.2.50    |
    +-----------+
    1 row in set (0.01 sec)

**后台进程**

[admin@tank ~]$ ps -ef|grep admin
    root      11411  10683  0 15:17 pts/0    00:00:00 su - admin
    admin     11412  11411  0 15:17 pts/0    00:00:00 -bash
    root      12058  11493  0 15:26 pts/0    00:00:00 su - admin
    admin     12059  12058  0 15:26 pts/0    00:00:00 -bash
    admin     13272      1 99 15:35 ?        04:17:32 /ob/ob1.obs0/bin/observer -P 2882 -p 2881 -z test -n ob1.admin -c 1 -d /ob/ob1.obs0/store -l INFO -i lo -r 127.0.0.1:2882:2881 -o memory_limit=8G,cache_wash_threshold=1G,row_purge_thread_count=1,net_thread_count=1,enable_syslog_recycle=True,enable_merge_by_turn=FALSE,cpu_count=16,location_refresh_thread_count=2,max_syslog_file_count=3,major_freeze_duty_time=Disable,__easy_memory_limit=1G,schema_history_expire_time=1d,merge_thread_count=1,writing_throttling_trigger_percentage=70,_max_trx_size=2M,workers_per_cpu_quota=2,enable_separate_sys_clog=0,datafile_disk_percentage=50,__min_full_resource_pool_memory=536870912,system_memory=5G,memory_chunk_cache_size=128M,trace_log_slow_query_watermark=10s,writing_throttling_maximum_duration=1m,switchover_process_thread_count=1,datafile_size=10G,minor_freeze_times=500,stack_size=1536K,disk_io_thread_coun=1
    admin     14357  12059  0 15:50 pts/0    00:00:00 python2 ./hap.py ob1.obmysql
    admin     14364  14357  0 15:50 pts/0    00:00:00 ./mysql --prompt OceanBase(\u@\d)> -h 127.0.0.1 -P 2881 -uroot -Doceanbase -c

**结语**

试用版安装已完成，对于单机的试用版来说安装比较简单，创建用户、解压、初始化即完成了安装，可以说是分分钟搞定。

通过简单的验证可以发现和黑屏客户端基本和MySQL是一致的，熟悉MySQL的同学可直接上手操作，以上是试用版的安装记录，后续讲深入学习OceanBase在技术架构上的内容。

**参考资料**

https://www.oceanbase.com/docs/oceanbase-trial/V2.2.50/gvudvy

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2RhaXllamF2YQ_size_16_color_FFFFFF_t_70][]

[0e1440da2494955506bf345be2faf3b1.png]: /images/20221120/e236330a3f2d4824b0e417b2d9c7110e.png
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