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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 ~]# 本文转自：https://blog.csdn.net/qq_45392321/article/details/123171408
