腾讯云轻量应用服务器下使用RPM包方式安装GreatSQL单主环境
腾讯云轻量应用服务器下使用RPM方式安装GreatSQL数据库
今天主要介绍使用RPM包方式在腾讯云轻量应用服务器上安装部署GreatSQL数据库，服务器系统为CentOS 7.6并以root身份进行操作，虚拟机环境中安装步骤也大体相同
运行环境配置
首先需要关闭selinux和防火墙
#关闭selinux
setenforce=0
sed -i '/^SELINUX=/c'SELINUX=disabled /etc/selinux/config
#关闭防火墙
systemctl disable firewalld
systemctl stop firewalld
systemctl disable iptables
systemctl stop iptables
安装前置依赖包
yum install -y pkg-config perl libaio-devel numactl-devel numactl-libs net-tools openssl openssl-devel jemalloc jemalloc-devel
下载GreatSQL提供的RPM包
切换至/usr/local目录下，使用wget下载以下四个包：
- greatsql-client-8.0.25-16.1.el7.x86_64.rpm
- greatsql-devel-8.0.25-16.1.el7.x86_64.rpm
- greatsql-shared-8.0.25-16.1.el7.x86_64.rpm
- greatsql-server-8.0.25-16.1.el7.x86_64.rpm
cd /usr/local
wget https://product.greatdb.com/GreatSQL-8.0.25-16/greatsql-client-8.0.25-16.1.el7.x86_64.rpm
wget https://product.greatdb.com/GreatSQL-8.0.25-16/greatsql-devel-8.0.25-16.1.el7.x86_64.rpm
wget https://product.greatdb.com/GreatSQL-8.0.25-16/greatsql-shared-8.0.25-16.1.el7.x86_64.rpm
wget https://product.greatdb.com/GreatSQL-8.0.25-16/greatsql-server-8.0.25-16.1.el7.x86_64.rpm
安装RPM包
安装之前需要先检查系统自带的MariaDB是否卸载，如未卸载会导致安装错误
#查询是否安装有MariaDB
rpm -qa | grep maria
#卸载MariaDB
yum remove -y mariadb-libs.x86_64
接下来使用以下命令安装GreatSQL
rpm -ivh greatsql*rpm
这样即是安装成功
修改配置信息
vim /lib/systemd/system/mysqld.service
在[Service]区间内增加以下内容，并修改LimitNOFILE=65535
# some limits
# file size
LimitFSIZE=infinity
# cpu time
LimitCPU=infinity
# virtual memory size
LimitAS=infinity
# processes/threads
LimitNPROC=65535
# locked memory
LimitMEMLOCK=infinity
# total threads (user+kernel)
TasksMax=infinity
TasksAccounting=false
保存退出后，执行重载命令
systemctl daemon-reload
执行命令启动GreatSQL服务
systemctl start mysqld
执行命令检查GreatSQL服务是否正常启动，以及进程状态
[root@VM-4-4-centos local]# systemctl status mysqld
● mysqld.service - MySQL Server
Loaded: loaded (/usr/lib/systemd/system/mysqld.service; enabled; vendor preset: disabled)
Active: active (running) since Sat 2022-09-03 14:09:17 CST; 5s ago
Docs: man:mysqld(8)
http://dev.mysql.com/doc/refman/en/using-systemd.html
Process: 5750 ExecStartPre=/usr/bin/mysqld_pre_systemd (code=exited, status=0/SUCCESS)
Main PID: 5856 (mysqld)
Status: "Server is operational"
CGroup: /system.slice/mysqld.service
└─5856 /usr/sbin/mysqld
Sep 03 14:09:08 VM-4-4-centos systemd[1]: Starting MySQL Server...
Sep 03 14:09:17 VM-4-4-centos systemd[1]: Started MySQL Server.
[root@VM-4-4-centos local]# ps -ef | grep mysqld
mysql 5856 1 2 14:09 ? 00:00:02 /usr/sbin/mysqld
[root@VM-4-4-centos local]# ss -lntp | grep mysqld
LISTEN 0 70 [::]:33060 [::]:* users:(("mysqld",pid=5856,fd=22))
LISTEN 0 128 [::]:3306 [::]:* users:(("mysqld",pid=5856,fd=25))
#查看数据库文件
[root@VM-4-4-centos local]# cd /var/lib/mysql
[root@VM-4-4-centos mysql]# ls
auto.cnf client-cert.pem ibdata1 mysql mysqlx.sock.lock server-key.pem
binlog.000001 client-key.pem ib_logfile0 mysql.ibd performance_schema sys
binlog.index #ib_16384_0.dblwr ib_logfile1 mysql.sock private_key.pem undo_001
ca-key.pem #ib_16384_1.dblwr ibtmp1 mysql.sock.lock public_key.pem undo_002
ca.pem ib_buffer_pool #innodb_temp mysqlx.sock server-cert.pem
登录GreatSQL数据库
在使用RPM方式安装GreatSQL数据库并成功启动后，会自动帮我们生成一个root密码，需要我们手动搜索日志来获取
[root@VM-4-4-centos mysql]# grep -i root /var/log/mysqld.log
2022-09-03T06:09:12.005684Z 6 [Note] [MY-010454] [Server] A temporary password is generated for root@localhost: jov6e1a,7_lG
现在我们就可以使用随机生成的密码进行登录
mysql -uroot -pjov6e1a,7_lG
登录后会发现，使用命令会报错！？这是怎么回事
mysql> show databases;
ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement.
原来在首次登录GreatSQL后，要立即修改root密码，否则无法执行其他操作，并且新密码要符合一定安全规则，那么我们可以使用以下命令修改root密码:
mysql> alter user user() identified by 'GreatSQL@2022';
Query OK, 0 rows affected (0.01 sec)
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| sys |
+--------------------+
4 rows in set (0.00 sec)
至此，GreatSQL部署完成，可以愉快的使用了