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diff --git "a/\345\256\211\350\243\205\351\203\250\347\275\262 \346\211\213\345\212\250\351\203\250\347\275\262CentOS7.9\347\216\257\345\242\203\344\270\213\347\232\204 OceanBase \345\215\225\345\211\257\346\234\254\351\233\206\347\276\244.md" "b/\345\256\211\350\243\205\351\203\250\347\275\262 \346\211\213\345\212\250\351\203\250\347\275\262CentOS7.9\347\216\257\345\242\203\344\270\213\347\232\204 OceanBase \345\215\225\345\211\257\346\234\254\351\233\206\347\276\244.md"
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--- /dev/null
+++ "b/\345\256\211\350\243\205\351\203\250\347\275\262 \346\211\213\345\212\250\351\203\250\347\275\262CentOS7.9\347\216\257\345\242\203\344\270\213\347\232\204 OceanBase \345\215\225\345\211\257\346\234\254\351\233\206\347\276\244.md"	
@@ -0,0 +1,413 @@
+## 一、前期准备
+### 1.准备：
+#### ⑴硬件条件：
+    4核CPU，32G内存，500G硬盘容量，网卡型号：lo
+#### ⑵软件信息：
+    IP地址：127.0.0.1。软件版本：CentOS Linux release 7.9.2009 (Core)
+#### ⑶准备服务器：
+| 角色 | 机器 | 备注 |
+| --- | --- | --- |
+| observer | 127.0.0.1 | zone1, 监听2881和2883端口 |
+| obproxy | 127.0.0.1 | 监听2883和2884端口 |
+
+#### ⑷ 硬盘信息：
+
+![1-1-4-01.png](media/lxs-picture/1-1-4-01.png)
+
+### 2.安装相关应用工具软件
+
+    yum -y install tree
+
+    yum install epel-release -y
+
+    yum install -y net-tools lrzsz tree htop dstat sysvinit-tools
+
+    yum -y install sysvinit-tools
+
+    yum install -y net-tools
+
+### 3.下载OceanBase 软件：
+
+    从OB官网社区版下载如下五个软件：
+
+①libobclient-2.0.0-2.el7.x86_64.rpm
+
+②obclient-2.0.0-2.el7.x86_64.rpm
+
+③obproxy-3.2.0-1.el7.x86_64.rpm
+
+④oceanbase-ce-3.1.2-10000392021123010.el7.x86_64.rpm
+
+⑤oceanbase-ce-libs-3.1.2-10000392021123010.el7.x86_64.rpm
+
+### 4.服务器内核参数初始化
+
+[root@localhost etc]# vim /etc/sysctl.conf
+
+    net.core.somaxconn = 2048
+
+    net.core.netdev_max_backlog = 10000
+
+    net.core.rmem_default = 16777216
+
+    net.core.wmem_default = 16777216
+
+    net.core.rmem_max = 16777216
+
+    net.core.wmem_max = 16777216
+
+
+    net.ipv4.ip_local_port_range = 3500 65535
+
+    net.ipv4.ip_forward = 0
+
+    net.ipv4.conf.default.rp_filter = 1
+
+    net.ipv4.conf.default.accept_source_route = 0
+
+    net.ipv4.tcp_syncookies = 0
+
+    net.ipv4.tcp_rmem = 4096 87380 16777216
+
+    net.ipv4.tcp_wmem = 4096 65536 16777216
+
+    net.ipv4.tcp_max_syn_backlog = 16384
+
+    net.ipv4.tcp_fin_timeout = 15
+
+    net.ipv4.tcp_max_syn_backlog = 16384
+
+    net.ipv4.tcp_tw_reuse = 1
+
+    net.ipv4.tcp_tw_recycle = 1
+
+    net.ipv4.tcp_slow_start_after_idle = 0
+
+
+    vm.swappiness = 0
+
+    vm.min_free_kbytes = 2097152
+
+    vm.max_map_count = 655360
+
+    fs.aio-max-nr = 1048576
+
+
+[root@localhost etc]# sysctl -p生效。
+
+### 5.会话设置：
+
+[root@localhost security]# vim limits.conf
+* soft nofile 655360
+* hard nofile 655360
+* soft nproc 655360
+* hard nproc 655360
+* soft core unlimited
+* hard core unlimited
+* soft stack unlimited
+* hard stack unlimited
+
+[root@localhost security]# ulimit -a
+
+    ulimit -a检查，退出重新登录会话生效。
+
+### 6.关闭防火墙和SELinux设置：
+#### ⑴查看防火墙状态
+    systemctl stop firewalld
+#### ⑵关闭 SELinux
+
+修改 SELinux 配置文件中的 SELINUX 选项。
+
+    vim /etc/selinux/config
+
+**# This file controls the state of SELinux on the system.**
+
+**# SELINUX= can take one of these three values:**
+
+**#     enforcing - SELinux security policy is enforced.**
+
+**#     permissive - SELinux prints warnings instead of enforcing.**
+
+**#     disabled - No SELinux policy is loaded.**
+
+    SELINUX=disabled
+
+配置文件修改后需要重启主机后生效，也可以使用下面命令立即生效。
+
+    setenforce 0
+
+## 二、安装
+### 1.用户设置：
+#### ⑴增加用户：
+    useradd admin
+    passwd  admin
+#### ⑵授予admin用户sudo权限：
+    [angel@localhost /]＃cat /etc/sudoers
+    rootALL=(ALL) ALL
+    admin   ALL=(ALL)       ALL
+#### ⑶目录权限：
+    chown -R admin.admin /data /redo
+#### ⑷时钟同步：
+    yum -y install chrony
+### 2.创建工作目录：
+    mkdir -p /home/admin/oceanbase/store/{sstable,etc3,clog,ilog,slog,etc2}
+
+    [admin@XTZJ-20211224SR ~]$ tree ~/oceanbase/
+
+/home/admin/oceanbase/
+
+├── bin  
+├── etc  
+├── etc2  
+├── etc3  
+├── lib  
+├── log  
+├── run  
+└──  store  
+ ├── clog  
+ ├── sort_dir  
+ ├── ilog  
+ ├── slog   
+ └── sstable 
+
+### 3.安装软件：
+    rpm -ivh *.rpm
+
+![2-3-01.png](media/lxs-picture/2-3-01.png)
+
+### 4.查看安装：
+    rpm -ql libobclient-2.0.0-2.el7.x86_64.rpm
+
+    rpm -ql obclient-2.0.0-2.el7.x86_64.rpm
+
+    rpm -ql obproxy-3.2.0-1.el7.x86_64.rpm
+
+    rpm -ql oceanbase-ce-3.1.2-10000392021123010.el7
+
+    rpm -ql oceanbase-ce-libs-3.1.2-10000392021123010.el7.x86_64.rpm
+
+### 5.环境变量设置：
+
+    $ echo 'export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:~/oceanbase/lib' >> ~/.bash_profile
+
+    $ source ~/.bash_profile echo $LD_LIBRARY_PATH
+
+## 三、启动OB进程：
+### 1.启动：
+cd /home/admin/oceanbase && bin/observer -i lo -p 2881 -P 2882 -z zone1 -d /home/admin/oceanbase/store -r '127.0.0.1:2882:2881' -c 20220221 -n obdemo -o "memory_limit=8G,cache_wash_threshold=1G,__min_full_resource_pool_memory=268435456,system_memory=3G,memory_chunk_cache_size=128M,cpu_count=16,net_thread_count=4,datafile_size=50G,stack_size=1536K"
+
+### 2.查看进程：
+**ps -ef|grep observer**
+
+![3-2-01.png](media/lxs-picture/3-2-01.png)
+
+### 3.查看监听：
+    **netstat –ntlp**
+
+![3-3-01.png](media/lxs-picture/3-3-01.png)
+
+**OB启动成功！**
+### 4.集群：
+    **obclient -h 127.0.0.1 -P 2881 -uroot  -c -A**
+    **set session ob_query_timeout=1000000000; alter system bootstrap ZONE 'zone1' SERVER '127.0.0.1:2882';**
+
+### 5.集群成功后重新登录：
+    **obclient -h 127.0.0.1 -P 2881 -uroot@sys  -c -A**
+
+    **alter user root identified by '123';  #更改用户名和密码。后退出。**
+
+    **show databases;**
+
+![3-5-01.png](media/lxs-picture/3-5-01.png)
+
+**＃多了一个oceanbase数据库，说明初始化成功了。**
+**然后更改密码，退出后带密码登录。**
+
+**登录OB数据库，查看表：**
+
+![3-5-02.png](media/lxs-picture/3-5-02.png)
+
+    **show processlist;**
+
+![3-5-03.png](media/lxs-picture/3-5-03.png)
+
+select gmt_create,gmt_modified,tenant_id,tenant_name,replica_num,zone_list,primary_zone,info,locality,default_tablegroup_id,drop_tenant_time,status from __all_tenant;
+
+
+    **select * from __all_tenant;**
+    **use test;**
+
+**＃建表也可以，但是不要在SYS实例里面导入大量的数据，或者做功能性或性能测试。**
+**如果做测试可以做业务实例。**
+
+    **show tables;**
+
+    **MySQL [oceanbase]> select * from gv$tenant;＃只有一个实例是SYS实例。**
+
+**退出OB：**
+
+![3-5-04.png](media/lxs-picture/3-5-04.png)
+
+## 四、启动 OBPROXY 进程
+### 1.启动：
+cd ~/obproxy-3.2.0 && bin/obproxy -r "127.0.0.1:2881" -p 2883 -o "enable_strict_kernel_release=false,enable_cluster_checkout=false,enable_metadb_used=false" -c obdemo
+
+启动-c 指定的集群名obdemo和OBserver的集群名保持一致才能启动
+
+### 2.检查 OBPROXY监听进程正常
+进程 obproxy 默认会监听2个端口：2883 和 2884 。
+
+    ps -ef|grep obproxy
+
+![4-2-01.png](media/lxs-picture/4-2-01.png)
+
+    netstat -ntlp |grep obproxy
+
+![4-2-02.png](media/lxs-picture/4-2-02.png)
+
+    obclient -h 127.0.0.1 -u root@proxysys -P 2883 -p123
+
+![4-2-03.png](media/lxs-picture/4-2-03.png)
+
+### 3.修改 OBPROXY 管理密码
+    MySQL [(none)]> show proxyconfig like '%sys_password%';
+
+![4-3-01.png](media/lxs-picture/4-3-01.png)
+
+    alter proxyconfig set observer_sys_password = '123'; #修改obproxy and observer通信的密码。
+
+    alter proxyconfig set obproxy_sys_password = '123'; #修改obproxy 管理员的密码。
+
+![4-3-02.png](media/lxs-picture/4-3-02.png)
+
+密文显示如下：
+
+![4-3-03.png](media/lxs-picture/4-3-03.png)
+
+
+退出obproxy,再一次带密码登录
+
+        obclient -h 127.0.0.1 -u root@proxysys -P 2883 -p123
+
+![4-3-04.png](media/lxs-picture/4-3-04.png)
+
+    show processlist;
+
+![4-3-05.png](media/lxs-picture/4-3-05.png)
+
+    show databases;
+
+![4-3-06.png](media/lxs-picture/4-3-06.png)
+
+测试obproxy连OB集群：
+
+![4-3-07.png](media/lxs-picture/4-3-07.png)
+
+    obclient -h 127.0.0.1 -u root@sys#obdemo -P 2883 -p123 -c -A oceanbase
+
+![4-3-08.png](media/lxs-picture/4-3-08.png)
+
+漏了一步，需要到OB上去建用户。
+
+        obclient -h 127.0.0.1 -u root@sys -P 2881 -p123 -c -A oceanbase
+
+![4-3-09.png](media/lxs-picture/4-3-09.png)
+
+proxyro的用户需要在oceanbase集群里创建，并同时设置密码。
+
+    grant select on oceanbase.* to  proxyro identified by '123';
+
+![4-3-10.png](media/lxs-picture/4-3-10.png)
+
+    obclient -h 127.0.0.1 -u root@sys#obdemo -P 2883 -p123 -c -A oceanbase
+
+![4-3-11.png](media/lxs-picture/4-3-11.png)
+
+obproxy连接到了 ob集群。
+
+    show databases;
+
+![4-3-12.png](media/lxs-picture/4-3-12.png)
+
+    show processlist;
+
+![4-3-13.png](media/lxs-picture/4-3-13.png)
+
+    show full processlist;
+
+![4-3-14.png](media/lxs-picture/4-3-14.png)
+
+这表明obproxy起作用了。
+
+## 五、创建业务租户、数据库和表：
+### 1.创建资源规格和资源池：
+
+    create resource unit lxs_unit1 max_cpu=1, max_memory='1g', max_iops=1000, max_disk_size='10g', max_session_num=10000, min_cpu=1, min_memory='1g', min_iops=1000;
+
+    select * from __all_unit_config;
+
+![5-1-01.png](media/lxs-picture/5-1-01.png)
+
+    create resource pool lxs_pool1 unit='lxs_unit1', unit_num=1, zone_list=('zone1');
+
+    select resource_pool_id, name from __all_resource_pool;
+
+![5-1-02.png](media/lxs-picture/5-1-02.png)
+
+    tenant_id=-1,表示没有关联到用户。
+
+### 2.创建业务租户：
+    create tenant lxs_tenant1 resource_pool_list=('lxs_pool1');
+
+    select * from __all_tenant;
+
+    select gmt_create,gmt_modified,tenant_id,tenant_name,replica_num,zone_list,primary_zone,info,locality,default_tablegroup_id,drop_tenant_time,status from __all_tenant;
+
+![5-2-01.png](media/lxs-picture/5-2-01.png)
+
+查看资源情况：
+
+![5-2-02.png](media/lxs-picture/5-2-02.png)
+
+**重新登录数据库，连接新建业务租户：lxs_tenant1**
+
+    exit
+
+    退出sys，登录lxs_tenant1
+
+![5-2-03.png](media/lxs-picture/5-2-03.png)
+
+    show databases;
+
+![5-2-04.png](media/lxs-picture/5-2-04.png)
+
+### 3.创建数据库
+执行命令：create database lxs_db;
+
+![5-3-01.png](media/lxs-picture/5-3-01.png)
+
+创建数据表：lxs_student03
+
+执行命令：use lxs_db
+
+    create table lxs_student03(id int, name varchar(20));
+
+    insert into lxs_student03(id, name) value(1, 'angel');
+
+    insert into lxs_student03(id, name) value(2, 'alice');
+
+![5-3-02.png](media/lxs-picture/5-3-02.png)
+
+![5-3-03.png](media/lxs-picture/5-3-03.png)
+
+# 总结：遇到的坑。
+1.启动时，CPU数量设置至少需要16个，否则在租户中可能无法打开数据库。
+
+2.根目录设置尽可能大一点，我开始设置50G，无法启动，后来扩容了。
+
+3.查询IP时，要用hostname –i查询，再结合ifconfig确认网卡型号。
+
+4.启动的命令行需要用英文半角标点符号。
+
+5.如果启动过程中有任何问题，立即与老师和同学联系，请求帮助！
+