1 下载OB 4.0的all in one包
下载地址在这里
https://open.oceanbase.com/softwareCenter/community
打开页面点击第一个OceanBase All in One后弹出下载窗口，下载时注意点击对应CPU架构的链接。
2 将下载的包传到服务器上并解压安装
OceanBase 4.0对操作系统及内核的版本都有要求，如果是centos，要求本为7.x，内核3.10.0 版本及以上，检查一下操作系统及内核版本。
[root@my_ob ~]# uname -a Linux my_ob 3.10.0-1160.59.1.el7.x86_64 #1 SMP Wed Feb 23 16:47:03 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux[root@my_ob ~]# cat /etc/redhat-release CentOS Linux release 7.9.2009 (Core)
下载的安装包上传到/root目录下，解压到/usr/local目录下
[root@my_ob ~]# ls -l oceanbase-all-in-one.4.0.0.0-beta-100120221102135736.el7.x86_64.tar.gz-rw-r--r--1 root root 257703079 Dec 2609:15 oceanbase-all-in-one.4.0.0.0-beta-100120221102135736.el7.x86_64.tar.gz [root@my_ob ~]# tar -xzf oceanbase-all-in-one.4.0.0.0-beta-100120221102135736.el7.x86_64.tar.gz -C /usr/local
切换到/usr/local/oceanbase-all-in-one/bin目录下，运行安装脚本
[root@my_ob bin]# ./install.sh name: grafana version: 7.5.17 release:1 arch: x86_64 md5: 1bf1f338d3a3445d8599dc6902e7aeed4de4e0d6 add /usr/local/oceanbase-all-in-one/rpms/grafana-7.5.17-1.el7.x86_64.rpm to local mirror name: obagent version: 1.2.0 release:4.el7 arch: x86_64 md5: 0e8f5ee68c337ea28514c9f3f820ea546227fa7e add /usr/local/oceanbase-all-in-one/rpms/obagent-1.2.0-4.el7.x86_64.rpm to local mirror name: obproxy-ce version: 4.0.0 release:5.el7 arch: x86_64 md5: de53232a951184fad75b15884458d85e31d2f6c3 add /usr/local/oceanbase-all-in-one/rpms/obproxy-ce-4.0.0-5.el7.x86_64.rpm to local mirror name: oceanbase-ce version: 4.0.0.0 release:100000272022110114.el7 arch: x86_64 md5: 42611dc51ca9bb28f36e60e4406ceea4a74914c7 add /usr/local/oceanbase-all-in-one/rpms/oceanbase-ce-4.0.0.0-100000272022110114.el7.x86_64.rpm to local mirror name: oceanbase-ce-libs version: 4.0.0.0 release:100000272022110114.el7 arch: x86_64 md5: 188919f8128394bf9b62e3989220ded05f1d14da add /usr/local/oceanbase-all-in-one/rpms/oceanbase-ce-libs-4.0.0.0-100000272022110114.el7.x86_64.rpm to local mirror name: prometheus version: 2.37.1 release:10000102022110211.el7 arch: x86_64 md5: 58913c7606f05feb01bc1c6410346e5fc31cf263 add /usr/local/oceanbase-all-in-one/rpms/prometheus-2.37.1-10000102022110211.el7.x86_64.rpm to local mirror Disable remote ok ##################################################################### Install Finished ===================================================================== Setup Environment: source ~/.oceanbase-all-in-one/bin/env.sh Quick Start: obd demo More Details: obd -h=====================================================================
可以看到脚本不仅安装了ob，obproxy，也安装了prometheus，grafana。
3 集群部署和启动
可以使用obd demo命令快速部署和启动ob集群，不过使用这个命令部署需要50G的磁盘空间，我这里root文件系统没有这个多剩余空间，选择使用obd提供的配置文件示例来启动一个最小化的集群。
obd的配置文件示例在/usr/local/oceanbase-all-in-one/obd/usr/obd/example目录下，拷贝目录下的mini-local-example.yaml至当前用户的home目录下，简单编辑一下，可以部署和启动集群了。
[root@my_ob ~]# obd cluster deploy lo -c mini-local-example.yaml install oceanbase-ce-4.0.0.0 for local ok +--------------------------------------------------------------------------------------------+ | Packages | +--------------+---------+------------------------+------------------------------------------+ | Repository | Version | Release | Md5 | +--------------+---------+------------------------+------------------------------------------+ | oceanbase-ce | 4.0.0.0 | 100000272022110114.el7 | 42611dc51ca9bb28f36e60e4406ceea4a74914c7 | +--------------+---------+------------------------+------------------------------------------+ Repository integrity check ok Parameter check ok Open ssh connection ok Cluster status check ok Initializes observer work home ok Remote oceanbase-ce-4.0.0.0-100000272022110114.el7-42611dc51ca9bb28f36e60e4406ceea4a74914c7 repository install ok Remote oceanbase-ce-4.0.0.0-100000272022110114.el7-42611dc51ca9bb28f36e60e4406ceea4a74914c7 repository lib check ok lo deployed [root@my_ob ~]# obd cluster start lo Get local repositories ok Search plugins ok Open ssh connection ok Load cluster param plugin ok Check before start observer x [ERROR] (127.0.0.1): when production_mode is True, memory_limit can not be less then16.0G [ERROR] (127.0.0.1) / not enough disk space. (Avail: 11.4G, Need: 20.0G) See https://www.oceanbase.com/product/ob-deployer/error-codes .
集群部署时没有问题，启动时报错了，一个是生产模式下内存不能小于16G，另一个是空间不能小于20G，第一个问题可以将配置文件中的生产模式改为false，第二个问题则需要设置ob工作目录到较大的文件系统上。删除现有部署重新部署后启动集群。
[root@localhost ~]# obd cluster start lo Get local repositories ok Search plugins ok Open ssh connection ok Load cluster param plugin ok Check before start observer ok [WARN] (127.0.0.1) The recommended value of fs.aio-max-nr is 1048576 (Current value: 65536) [WARN] OBD-1007: (127.0.0.1) The recommended number of open files is 655350 (Current value: 65536) [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 ok Wait for observer init ok +---------------------------------------------+ | observer | +-----------+---------+------+-------+--------+ | ip | version | port | zone | status | +-----------+---------+------+-------+--------+ | 127.0.0.1 | 4.0.0.0 | 2881 | zone1 | ACTIVE | +-----------+---------+------+-------+--------+ obclient -h127.0.0.1 -P2881-uroot-Doceanbase lo running
集群启动成功，可以使用obclient登录了
[root@localhost ~]# obclient -h127.0.0.1 -P2881 -uroot -Doceanbase 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 OceanBase. Commands end with ; or \g. Your OceanBase connection id is 3221487617 Server version: OceanBase_CE 4.0.0.0 (r100000272022110114-6af7f9ae79cd0ecbafd4b1b88e2886ccdba0c3be) (Built Nov 1202214:57:18) Copyright (c) 2000, 2018, OB Corporation Ab and others. Type 'help;' or '\h'for help. Type '\c' to clear the current input statement.
检查一下数据库的版本
obclient [oceanbase]>select version();+------------------------------+| version()|+------------------------------+|5.7.25-OceanBase_CE-v4.0.0.0|+------------------------------+1 row inset(0.001 sec)
