GreatSQL历史文章，

《GreatSQL单机环境安装》

《国产数据库之-GreatSQL》

我们单机版安装用的是mysql.server start启动的数据库，但从标准化管理的角度，使用systemd更加合适，我们参考《技术分享 | 将GreatSQL添加到系统systemd服务》，进行下配置。

systemd是Linux系统启动和服务器守护进程管理器，负责在系统启动或运行时，激活系统资源，服务器进程和其他进程，systemd被设计用来改进原来sysvinit中的多个缺点。

1. 服务程序脚本

CentOS 7的systemd服务程序脚本存放在/usr/lib/systemd/目录下，并区分system和user，每一个服务程序脚本以.service结尾，例如/usr/lib/systemd/system/sshd.service。

为了配置GreatSQL到systemd，我们需要一些辅助的脚本，GreatSQL标准二进制包中没提供这些，可以从下面这个链接中下载，Ansible安装包提供了这几个文件，如果是rpm包安装，会自动配好systemd。

https://gitee.com/GreatSQL/GreatSQL-Ansible/tree/master/mysql-support-files

greatsql.service是GreatSQL的服务程序脚本，需要放到/usr/lib/systemd/system，内容如下，

[Unit]
Description=GreatSQL Server
Documentation=man:mysqld(8)
Documentation=http://dev.mysql.com/doc/refman/en/using-systemd.html
After=network.target
After=syslog.target
[Install]
WantedBy=multi-user.target
[Service]
User=mysql
Group=mysql
Type=notify
TimeoutSec=0
PermissionsStartOnly=true
ExecStartPre=/opt/mysql/GreatSQL/bin/mysqld_pre_systemd
ExecStart=/opt/mysql/GreatSQL/bin/mysqld $MYSQLD_OPTS
EnvironmentFile=-/etc/sysconfig/mysql
LimitNOFILE = 10000
Restart=on-failure
RestartPreventExitStatus=1
Environment=MYSQLD_PARENT_PID=1
PrivateTmp=false

2. 其他配置文件

(1) 需要将数据库的my.cnf配置文件复制到/etc路径下。

(2) 需要将如上下载到的sysconfig/mysql配置文件复制到/etc/sysconfig，内容如下，这是为了能让GreatSQL启动时加载jemalloc，获得更好的内存管理性能，

cat mysql
LD_PRELOAD=/usr/lib64/libjemalloc.so.1

3. 启动GreatSQL服务

将GreatSQL服务正式加载到systemd列表中，这就会自动将GreatSQL这个新服务加载进来了，

[root@bisal~]# systemctl daemon-reload

启动服务，

[root@bisal~]# systemctl start greatsql
或者
[root@bisal~]# systemctl start greatsql.service

mysql.error.log记录如下，

[mysql@bisal logs]$ tail -f mysql.error.log
2022-04-05T09:00:32.363066+08:00 0 [Warning] [MY-010097] [Server] Insecure configuration for --secure-file-priv: Current value does not restrict location of generated files. Consider setting it to a valid, non-empty path.
2022-04-05T09:00:32.363131+08:00 0 [System] [MY-010116] [Server] /opt/mysql/GreatSQL/bin/mysqld (mysqld 8.0.25-15) starting as process 24903
2022-04-05T09:00:32.482816+08:00 1 [System] [MY-013576] [InnoDB] InnoDB initialization has started.
2022-04-05T09:00:32.907440+08:00 1 [System] [MY-013577] [InnoDB] InnoDB initialization has ended.
2022-04-05T09:00:33.291026+08:00 0 [System] [MY-011323] [Server] X Plugin ready for connections. Bind-address: '::' port: 33060, socket: /tmp/mysqlx.sock
2022-04-05T09:00:33.500896+08:00 0 [Warning] [MY-010068] [Server] CA certificate ca.pem is self signed.
2022-04-05T09:00:33.501261+08:00 0 [System] [MY-013602] [Server] Channel mysql_main configured to support TLS. Encrypted connections are now supported for this channel.
2022-04-05T09:00:33.602927+08:00 0 [System] [MY-010931] [Server] /opt/mysql/GreatSQL/bin/mysqld: ready for connections. Version: '8.0.25-15'  socket: '/opt/mysql/data/tmp/mysql.3306.sock'  port: 3306  GreatSQL, Release 15, Revision c7feae175e0.

可以使用systemctl status greatsql，查看服务状态，

[root@bisal bin]# systemctl status greatsql
● greatsql.service - GreatSQL ServerLoaded: loaded (/usr/lib/systemd/system/greatsql.service; enabled; vendor preset: disabled)Active: active (running) since Thu 2022-04-05 09:00:33 CST; 2min 2s agoDocs: man:mysqld(8)http://dev.mysql.com/doc/refman/en/using-systemd.htmlProcess: 24879 ExecStartPre=/opt/mysql/GreatSQL/bin/mysqld_pre_systemd (code=exited, status=0/SUCCESS)Main PID: 24903 (mysqld)Status: "Server is operational"CGroup: /system.slice/greatsql.service└─24903 /opt/mysql/GreatSQL/bin/mysqldApr 05 09:00:31 bisal systemd[1]: Starting GreatSQL Server...
Apr 05 09:00:33 bisal systemd[1]: Started GreatSQL Server.

停止服务，

[root@bisal bin]# systemctl stop greatsql

mysql.error.log记录如下，

2022-04-05T09:00:00.647734+08:00 0 [System] [MY-013172] [Server] Received SHUTDOWN from user <via user signal>. Shutting down mysqld (Version: 8.0.25-15).
2022-04-05T09:00:03.513475+08:00 0 [System] [MY-010910] [Server] /opt/mysql/GreatSQL/bin/mysqld: Shutdown complete (mysqld 8.0.25-15)  GreatSQL, Release 15, Revision c7feae175e0.

启用开机启动，

[root@bisal bin]# systemctl enable greatsql
Created symlink from /etc/systemd/system/multi-user.target.wants/greatsql.service to /usr/lib/systemd/system/greatsql.service.

常用指令，

重载系统服务：systemctl daemon-reload

启用开机启动：systemctl enable greatsql

禁用开机启动：systemctl disable greatsql

启动服务：systemctl start greatsql

停止服务：systemctl stop greatsql

重启服务：systemctl restart greatsql

查看服务状态：systemctl status greatsql

近期更新的文章：

《GreatSQL单机环境安装》

《推荐一款小游戏》

《还得唠叨两句中国男足》

《国产数据库之-GreatSQL》

《无外网的情况下，DBeaver下载数据库驱动的方案》

文章分类和索引：

《公众号900篇文章分类和索引》