一、OceanBase介绍
OceanBase是由蚂蚁集团完全自主研发的金融级分布式关系数据库，始创于2010年。OceanBase具有数据强一致、高可用、高性能、在线扩展、高度兼容SQL标准和主流关系数据库、低成本等特点。
OceanBase 社区版是一款开源分布式 HTAP（Hybrid Transactional/Analytical Processing）数据库管理系统，具有原生分布式架构，支持金融级高可用、透明水平扩展、分布式事务、多租户和语法兼容等企业级特性。OceanBase 内核通过大规模商用场景的考验，已服务众多行业客户，现面向未来持续构建内核技术竞争力。
二、OceanBase安装操作
本实验基于CentOS 7.9系统进行演示操作
[root@oceanbase ~]# cat /etc/redhat-release
CentOS Linux release 7.9.2009 (Core)
安装前期准备
本实验采用单机模式 的部署方式，在同一台机器上安装服务端和客户端进行测试。
需要内存大小8GB 以上；（本实验内存大小 10 GB）
磁盘空间大小65GB以上；（本实验磁盘大小 95 GB）
1、通过 YUM 软件源下载并安装 OBD
执行以下三种命令。
# yum install -y yum-utils
# yum-config-manager --add-repo https://mirrors.aliyun.com/oceanbase/OceanBase.repo
# yum install -y ob-deploy
[root@obd ~]# yum install -y yum-utils
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
Package yum-utils-1.1.31-54.el7_8.noarch already installed and latest version
Nothing to do
[root@obd ~]# yum-config-manager --add-repo https://mirrors.aliyun.com/oceanbase/OceanBase.repo
Loaded plugins: fastestmirror
adding repo from: https://mirrors.aliyun.com/oceanbase/OceanBase.repo
grabbing file https://mirrors.aliyun.com/oceanbase/OceanBase.repo to /etc/yum.repos.d/OceanBase.repo
repo saved to /etc/yum.repos.d/OceanBase.repo
[root@obd ~]# yum install -y ob-deploy
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
Package ob-deploy-1.2.1-9.el7.x86_64 already installed and latest version
Nothing to do
[root@obd ~]#
或者
离线安装 OBD
1. 下载 OBD 离线 RPM 安装包。
2. 运行以下命令安装 OBD。
# yum install -y ob-deploy-1.0.0-1.el7.x86_64.rpm
# source /etc/profile.d/obd.sh
2、下载 OceanBase 数据库配置文件模板
从 Github 上下载对应的配置文件模板。本实验采用的是mini-local-example.yaml 配置文件
Gitee下载链接：
example/mini-local-example.yaml · OceanBase/obdeploy - Gitee.com
oceanbase-ce:
servers:
# Please don't use hostname, only IP can be supported
- 127.0.0.1
global:
# The working directory for OceanBase Database. OceanBase Database is started under this directory. This is a required field.
home_path: /xyb/observer
# The directory for data storage. The default value is $home_path/store.
# data_dir: /data
# The directory for clog, ilog, and slog. The default value is the same as the data_dir value.
# redo_dir: /redo
# Please set devname as the network adaptor's name whose ip is in the setting of severs.
# if set severs as "127.0.0.1", please set devname as "lo"
# if current ip is 192.168.1.10, and the ip's network adaptor's name is "eth0", please use "eth0"
devname: lo
mysql_port: 2881 # External port for OceanBase Database. The default value is 2881. DO NOT change this value after the cluster is started.
rpc_port: 2882 # Internal port for OceanBase Database. The default value is 2882. DO NOT change this value after the cluster is started.
zone: zone1
cluster_id: 1
# please set memory limit to a suitable value which is matching resource.
memory_limit: 8G # The maximum running memory for an observer
system_memory: 4G # The reserved system memory. system_memory is reserved for general tenants. The default value is 30G.
stack_size: 512K
cpu_count: 16
cache_wash_threshold: 1G
__min_full_resource_pool_memory: 268435456
workers_per_cpu_quota: 10
schema_history_expire_time: 1d
# The value of net_thread_count had better be same as cpu's core number.
net_thread_count: 4
sys_bkgd_migration_retry_num: 3
minor_freeze_times: 10
enable_separate_sys_clog: 0
enable_merge_by_turn: FALSE
datafile_disk_percentage: 20 # The percentage of the data_dir space to the total disk space. This value takes effect only when datafile_size is 0. The default value is 90.
syslog_level: INFO # System log level. The default value is INFO.
enable_syslog_wf: false # Print system logs whose levels are higher than WARNING to a separate log file. The default value is true.
enable_syslog_recycle: true # Enable auto system log recycling or not. The default value is false.
max_syslog_file_count: 4 # The maximum number of reserved log files before enabling auto recycling. The default value is 0.
# root_password: # root user password, can be empty
3、部署 OceanBase 数据库
运行以下命令部署集群
obd cluster deploy <deploy_name> -c <deploy_config_file> -A
[root@obs ~]# obd cluster deploy xybobs -c mini-local-example.yaml
Update OceanBase-community-stable-el7 ok
Update OceanBase-development-kit-el7 ok
Download oceanbase-ce-3.1.2-10000392021123010.el7.x86_64.rpm (46.45 M): 100% [##############] Time: 0:00:08 5.74 MB/s
Package oceanbase-ce-3.1.2 is available.
install oceanbase-ce-3.1.2 for local ok
+-------------------------------------------------------------------------------------------+
| Packages |
+--------------+---------+-----------------------+------------------------------------------+
| Repository | Version | Release | Md5 |
+--------------+---------+-----------------------+------------------------------------------+
| oceanbase-ce | 3.1.2 | 10000392021123010.el7 | 7fafba0fac1e90cbd1b5b7ae5fa129b64dc63aed |
+--------------+---------+-----------------------+------------------------------------------+
Repository integrity check ok
Parameter check ok
Open ssh connection ok
Remote oceanbase-ce-3.1.2-7fafba0fac1e90cbd1b5b7ae5fa129b64dc63aed repository install ok
Remote oceanbase-ce-3.1.2-7fafba0fac1e90cbd1b5b7ae5fa129b64dc63aed repository lib check !!
[WARN] 127.0.0.1 oceanbase-ce-3.1.2-7fafba0fac1e90cbd1b5b7ae5fa129b64dc63aed require: libmariadb.so.3
Try to get lib-repository
Download oceanbase-ce-libs-3.1.2-10000392021123010.el7.x86_64.rpm (155.22 K): 100% [########] Time: 0:00:00 6.76 MB/s
Package oceanbase-ce-libs-3.1.2 is available.
install oceanbase-ce-libs-3.1.2 for local ok
Use oceanbase-ce-libs-3.1.2-94fff0ab31de053051dba66039e3185fa390cad5 for oceanbase-ce-3.1.2-7fafba0fac1e90cbd1b5b7ae5fa129b64dc63aed
Remote oceanbase-ce-libs-3.1.2-94fff0ab31de053051dba66039e3185fa390cad5 repository install ok
Remote oceanbase-ce-3.1.2-7fafba0fac1e90cbd1b5b7ae5fa129b64dc63aed repository lib check ok
Cluster status check ok
Initializes observer work home ok
xybobs deployed
[root@obs ~]#
4、启动 OceanBase 数据库
[root@obs ~]# obd cluster start xybobs
Get local repositories and plugins ok
Open ssh connection ok
Load cluster param plugin ok
Check before start observer ok
[WARN] (127.0.0.1) clog and data use the same disk (/)
Start observer ok
observer program health check ok
Connect to observer ok
Initialize cluster
Cluster bootstrap ok
Wait for observer init ok
+---------------------------------------------+
| observer |
+-----------+---------+------+-------+--------+
| ip | version | port | zone | status |
+-----------+---------+------+-------+--------+
| 127.0.0.1 | 3.1.2 | 2881 | zone1 | active |
+-----------+---------+------+-------+--------+
xybobs running
[root@obs ~]#
5、连接OceanBase数据库
安装OceanBase数据库客户端 OBClient
# yum install -y obclient
[root@obs ~]# yum install -y obclient
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
Resolving Dependencies
--> Running transaction check
---> Package obclient.x86_64 0:2.0.0-2.el7 will be installed
--> Processing Dependency: libobclient >= 2.0.0 for package: obclient-2.0.0-2.el7.x86_64
--> Running transaction check
---> Package libobclient.x86_64 0:2.0.0-2.el7 will be installed
--> Finished Dependency Resolution
Dependencies Resolved
======================================================================================================================================
Package Arch Version Repository Size
======================================================================================================================================
Installing:
obclient x86_64 2.0.0-2.el7 oceanbase.community.stable 40 M
Installing for dependencies:
libobclient x86_64 2.0.0-2.el7 oceanbase.community.stable 643 k
Transaction Summary
======================================================================================================================================
Install 1 Package (+1 Dependent package)
Total download size: 41 M
Installed size: 188 M
Downloading packages:
(1/2): libobclient-2.0.0-2.el7.x86_64.rpm | 643 kB 00:00:00
(2/2): obclient-2.0.0-2.el7.x86_64.rpm | 40 MB 00:00:06
--------------------------------------------------------------------------------------------------------------------------------------
Total 6.6 MB/s | 41 MB 00:00:06
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Installing : libobclient-2.0.0-2.el7.x86_64 1/2
Installing : obclient-2.0.0-2.el7.x86_64 2/2
Verifying : libobclient-2.0.0-2.el7.x86_64 1/2
Verifying : obclient-2.0.0-2.el7.x86_64 2/2
Installed:
obclient.x86_64 0:2.0.0-2.el7
Dependency Installed:
libobclient.x86_64 0:2.0.0-2.el7
Complete!
[root@obs ~]#
使用Root用户登录 OceanBase 数据库
[root@obs ~]# obclient -h192.168.200.88 -P2881 -uroot
Welcome to the OceanBase. Commands end with ; or \g.
Your MySQL connection id is 3221487658
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 |
| SYS |
| LBACSYS |
| ORAAUDITOR |
| test |
+--------------------+
7 rows in set (0.007 sec)
MySQL [(none)]> exit
Bye
切换使用obs用户登录 OceanBase 数据库
[root@obs ~]# su obs
[obs@obs root]$ obclient -h192.168.200.88 -P2881 -uroot
Welcome to the OceanBase. Commands end with ; or \g.
Your MySQL connection id is 3221487837
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.
# 查看数据库
MySQL [(none)]> show databases;
+--------------------+
| Database |
+--------------------+
| oceanbase |
| information_schema |
| mysql |
| SYS |
| LBACSYS |
| ORAAUDITOR |
| test |
+--------------------+
7 rows in set (0.002 sec)
MySQL [(none)]>
6、OceanBase 数据库 常用命令
# obs帮助命令
[root@obs ~]# obd -h
Usage: obd <command> [options]
Available commands:
cluster Deploy and manage a cluster.
mirror Manage a component repository for OBD.
repo Manage local repository for OBD.
test Run test for a running deployment.
update Update OBD.
Options:
--version show program's version number and exit
-h, --help Show help and exit.
-v, --verbose Activate verbose output.
# 查看obd管理的集群列表
[root@obs ~]# obd cluster list
+------------------------------------------------------+
| Cluster List |
+--------+---------------------------+-----------------+
| Name | Configuration Path | Status (Cached) |
+--------+---------------------------+-----------------+
| xybobs | /root/.obd/cluster/xybobs | running |
+--------+---------------------------+-----------------+
# 查看集群状态
[root@obs ~]# obd cluster display xybobs
Get local repositories and plugins ok
Open ssh connection ok
Cluster status check ok
Connect to observer ok
Wait for observer init ok
+---------------------------------------------+
| observer |
+-----------+---------+------+-------+--------+
| ip | version | port | zone | status |
+-----------+---------+------+-------+--------+
| 127.0.0.1 | 3.1.2 | 2881 | zone1 | active |
+-----------+---------+------+-------+--------+
三、安装过程中的报错信息
磁盘空间不足，至少所需65G磁盘空间大小。
[root@obs ~]# vim mini-local-example.yaml
[root@obs ~]# obd cluster autodeploy xyb -c mini-local-example.yaml
Update OceanBase-community-stable-el7 ok
Update OceanBase-development-kit-el7 ok
Download oceanbase-ce-3.1.2-10000392021123010.el7.x86_64.rpm (46.45 M): 100% [####] Time: 0:00:06 7.88 MB/s
Package oceanbase-ce-3.1.2 is available.
install oceanbase-ce-3.1.2 for local ok
Cluster param config check ok
Open ssh connection ok
Generate observer configuration x
[ERROR] (127.0.0.1) / not enough disk space. (Avail: 14.9G, Need: 64.1G). Use `redo_dir` to set other disk for clog
网卡名称错误❌，本机安装使用的IP是127.0.0.1，对应的网络名称是lo。销毁集群后重新部署。
[root@obs ~]# obd cluster start xybobs
Get local repositories and plugins ok
Open ssh connection ok
Load cluster param plugin ok
Check before start observer x
[WARN] (127.0.0.1) clog and data use the same disk (/)
[ERROR] 127.0.0.1 ens32 fail to ping 127.0.0.1. Please check configuration `devname`
[root@obs ~]#
提示所需的系统内存不足，需要提升内存大小。（推荐内存大小在16GB以上）
[root@obs ~]# obd cluster start xybobs
Get local repositories and plugins ok
Open ssh connection ok
Load cluster param plugin ok
Check before start observer x
[ERROR] (127.0.0.1) not enough memory. (Free: 7.3G, Need: 8.0G)
[WARN] (127.0.0.1) clog and data use the same disk (/)
[root@obs ~]#
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