# RPM安装
本文档主要介绍如何用RPM包方式安装GreatSQL数据库，假定本次安装是在CentOS 8.x x86_64环境中安装，并且是以root用户身份执行安装操作。
# 下载安装包
点击此处 (opens new window)下载最新的安装包，至少下载以下几个RPM包文件：
- greatsql-client-8.0.32-25.1.el8.x86_64.rpm
- greatsql-devel-8.0.32-25.1.el8.x86_64.rpm
- greatsql-icu-data-files-8.0.32-25.1.el8.x86_64.rpm
- greatsql-shared-8.0.32-25.1.el8.x86_64.rpm
- greatsql-server-8.0.32-25.1.el8.x86_64.rpm
提示：建议直接下载RPM集中打包文件，例如 greatsql-8.0.32-25.1.el8.x86_64.rpm-bundle.tar.xz，就无需每个文件单独下载了。
# 运行环境配置
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
另外，要先确认YUM源可用，因为安装GreatSQL时还要先安装其他依赖包，通过YUM安装最省事。
如果需要配置YUM源，可以参考这篇文档 (opens new window)。
# 安装依赖包
安装GreatSQL RPM包时，要先安装这些相关依赖包。
$ yum install -y pkg-config perl libaio-devel numactl-devel numactl-libs net-tools openssl openssl-devel jemalloc jemalloc-devel perl-Data-Dumper perl-Digest-MD5 python2 perl-JSON perl-Test-Simple
如果报告个别依赖包安装失败或者找不到就删掉，然后重试。更详细的请参考：安装准备。
# 安装RPM包
执行下面的命令安装PRM包，如果一切顺利的话，相应的过程如下所示：
$ rpm -ivh --nodeps greatsql*rpm
Verifying... ################################# [100%]
Preparing... ################################# [100%]
Updating / installing...
1:greatsql-shared-8.0.32-25.1.el8 ################################# [ 20%]
2:greatsql-client-8.0.32-25.1.el8 ################################# [ 40%]
3:greatsql-icu-data-files-8.0.32-25################################# [ 60%]
4:greatsql-server-8.0.32-25.1.el8 ################################# [ 80%]
5:greatsql-devel-8.0.32-25.1.el8 ################################# [100%]
这就安装成功了。
提示：
- 安装GreatSQL RPM包需要先安装其他依赖包，可执行下面命令完成：
$ yum install -y pkg-config perl libaio-devel numactl-devel numactl-libs net-tools openssl openssl-devel jemalloc jemalloc-devel perl-Data-Dumper perl-Digest-MD5 python2 perl-JSON perl-Test-Simple
如果报告个别依赖包安装失败或者找不到就删掉，然后重试。更详细的请参考：安装准备。
其他部分依赖包，如果通过YUM还是无法安装，则加上 --nodeps --force 强制忽略即可，例如：
$ rpm -ivh greatsql*rpm
error: Failed dependencies:
perl(Lmo) is needed by greatsql-server-8.0.32-25.1.el8.x86_64
perl(Lmo::Meta) is needed by greatsql-server-8.0.32-25.1.el8.x86_64
perl(Lmo::Object) is needed by greatsql-server-8.0.32-25.1.el8.x86_64
perl(Lmo::Types) is needed by greatsql-server-8.0.32-25.1.el8.x86_64
perl(Lmo::Utils) is needed by greatsql-server-8.0.32-25.1.el8.x86_64
perl(Percona::Toolkit) is needed by greatsql-server-8.0.32-25.1.el8.x86_64
perl(Quoter) is needed by greatsql-server-8.0.32-25.1.el8.x86_64
perl(Transformers) is needed by greatsql-server-8.0.32-25.1.el8.x86_64
#上述这些依赖包可以先忽略，不影响GreatSQL正常使用
$ rpm -ivh --nodeps --force greatsql*rpm
Preparing... ################################# [100%]
Updating / installing...
1:greatsql-shared-8.0.32-25.1.el7 ################################# [ 20%]
2:greatsql-client-8.0.32-25.1.el7 ################################# [ 40%]
3:greatsql-icu-data-files-8.0.32-25################################# [ 60%]
4:greatsql-server-8.0.32-25.1.el7 ################################# [ 80%]
5:greatsql-devel-8.0.32-25.1.el7 ################################# [100%]
- 正式安装GreatSQL RPM包时，可能还需要依赖Perl等其他软件包，此处为快速演示，因此加上
--nodeps参数，忽略相应的依赖关系检查。安装完毕后，如果因为依赖关系无法启动，请再行安装相应软件依赖包。
# 启动GreatSQL
启动GreatSQL服务前，先修改systemd文件，调高一些limit上限，避免出现文件数、线程数不够用的告警。
# 在[Server]区间增加下面几行内容
$ vim /lib/systemd/system/mysqld.service
...
[Service]
# some limits
# file size
LimitFSIZE=infinity
# cpu time
LimitCPU=infinity
# virtual memory size
LimitAS=infinity
# open files
LimitNOFILE=65535
# processes/threads
LimitNPROC=65535
# locked memory
LimitMEMLOCK=infinity
# total threads (user+kernel)
TasksMax=infinity
TasksAccounting=false
...
保存退出，然后再执行命令重载systemd，如果没问题就不会报错：
$ systemctl daemon-reload
执行下面的命令启动GreatSQL服务
$ systemctl start mysqld
检查服务是否已启动，以及进程状态：
$ systemctl status mysqld
● mysqld.service - MySQL Server
Loaded: loaded (/usr/lib/systemd/system/mysqld.service; enabled; vendor preset: disabled)
Active: active (running) since Wed 2022-07-06 10:35:57 CST; 42s ago
Docs: man:mysqld(8)
http://dev.mysql.com/doc/refman/en/using-systemd.html
Process: 43570 ExecStartPre=/usr/bin/mysqld_pre_systemd (code=exited, status=0/SUCCESS)
Main PID: 43653 (mysqld)
Status: "Server is operational"
Tasks: 39 (limit: 149064)
Memory: 446.4M
CGroup: /system.slice/mysqld.service
└─43653 /usr/sbin/mysqld
...
$ ps -ef | grep mysqld
mysql 43653 1 3 10:35 ? 00:00:02 /usr/sbin/mysqld
$ ss -lntp | grep mysqld
LISTEN 0 70 *:33060 *:* users:(("mysqld",pid=43653,fd=23))
LISTEN 0 128 *:3306 *:* users:(("mysqld",pid=43653,fd=26))
# 查看数据库文件
$ ls /var/lib/mysql
auto.cnf ca.pem '#ib_16384_1.dblwr' ib_logfile1 mysql.ibd mysqlx.sock.lock server-cert.pem undo_002
binlog.000001 client-cert.pem ib_buffer_pool ibtmp1 mysql.sock performance_schema server-key.pem
binlog.index client-key.pem ibdata1 '#innodb_temp' mysql.sock.lock private_key.pem sys
ca-key.pem '#ib_16384_0.dblwr' ib_logfile0 mysql mysqlx.sock public_key.pem undo_001
可以看到，GreatSQL服务已经正常启动了。
# 连接登入GreatSQL
RPM方式安装GreatSQL后，会随机生成管理员root的密码，通过搜索日志文件获取：
$ grep -i root /var/log/mysqld.log
2022-07-06T02:35:54.691879Z 6 [Note] [MY-010454] [Server] A temporary password is generated for root@localhost: K<f9Iapd#wwp
可以看到，root账户的密码是："K<f9Iapd#wwp" (不包含双引号)，复制到粘贴板里。
首次登入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：
$ mysql -uroot -p
Enter password: #<--这个地方粘贴上面复制的随机密码
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 8
Server version: 8.0.32-25 GreatSQL, Release 25, Revision db07cc5cb73
Copyright (c) 2021-2023 GreatDB Software Co., Ltd
Copyright (c) 2009-2021 Percona LLC and/or its affiliates
Copyright (c) 2000, 2021, Oracle and/or its affiliates.
...
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
greatsql> \s #<--想执行一个命令，提示要先修改密码
ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement.
greatsql> ALTER USER USER() IDENTIFIED BY 'GreatSQL@202X'; #<--修改密码
Query OK, 0 rows affected (0.02 sec)
greatsql> \s #<--就可以正常执行其他命令了
--------------
mysql Ver 8.0.32-25 for Linux on x86_64 (GreatSQL, Release 25, Revision db07cc5cb73)
Connection id: 11
Current database:
Current user: root@localhost
SSL: Not in use
Current pager: stdout
Using outfile: ''
Using delimiter: ;
Server version: 8.0.32-25 GreatSQL, Release 25, Revision db07cc5cb73
Protocol version: 10
Connection: Localhost via UNIX socket
Server characterset: utf8mb4
Db characterset: utf8mb4
Client characterset: utf8mb4
Conn. characterset: utf8mb4
UNIX socket: /var/lib/mysql/mysql.sock
Binary data as: Hexadecimal
Uptime: 10 min 14 sec
Threads: 2 Questions: 7 Slow queries: 0 Opens: 130 Flush tables: 3 Open tables: 46 Queries per second avg: 0.005
--------------
greatsql> SHOW DATABASES; #<--查看数据库列表
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| sys |
+--------------------+
4 rows in set (0.01 sec)
greatsql>
# 关闭/重启GreatSQL
执行下面的命令关闭GreatSQL数据库。
$ systemctl stop mysqld
执行下面的命令重启GreatSQL数据库。
$ systemctl restart mysqld
至此，RPM包方式安装GreatSQL数据库完成。
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