# 数据库服务器部署
数据库服务器部署在192.168.0.69和192.168.0.70上，每台主机需安装如下软件包
```
Mariadb
Ipvsadm
Keepalived
```
## 安装mariadb-server
双机均需要
用root登录
安装和配置数据库
* 安装
```
apt update
apt install mariadb-server
mysql_secure_installaction
```
设置数据库的root用户的密码为Root123

* 停服务
```
systemctl stop mariadb
```

* 将mysql数据库的数据目录复制到/d目录下
```
cp -a /var/lib/mysql /d
```
* 修改或添加 vi /etc/my.cnf, 内容如下
```
[client]
port        = 3306
socket      = /tmp/maria.sock
[mysqld]
port        = 3306
socket      = /tmp/maria.sock
skip-external-locking
key_buffer_size = 256M
max_allowed_packet = 1M
table_open_cache = 256
sort_buffer_size = 1M
read_buffer_size = 1M
read_rnd_buffer_size = 4M
myisam_sort_buffer_size = 64M
thread_cache_size = 8
query_cache_size= 16M
thread_concurrency = 4
datadir=/d/mysql
server-id=2
log-bin=mysql-bin
binlog_format=ROW
log-slave-updates
[mysqldump]
quick
max_allowed_packet = 16M
[mysql]
no-auto-rehash
[myisamchk]
key_buffer_size = 128M
sort_buffer_size = 128M
read_buffer = 2M
write_buffer = 2M
[mysqlhotcopy]
interactive-timeout
```
server-id在两台机器上分别设置为1或2

* 重启mariadb
```
systemctl start mariadb
```

## 安装ipvsadm
```
apt install ipvsadm
```

## 安装keepalived
* 安装
```
apt install keepalived
```
* 配置
在/etc/keepalived目录下，添加或修改keepalived.conf
```
! Configuration File for keepalived
global_defs {
   notification_email {
     root@localhost
     ymq@localhost
   }
   notification_email_from ymq@localhost
   smtp_server 127.0.0.1
   smtp_connect_timeout 30
   router_id LVS_DEVEL
}
vrrp_instance VI_1 {
    state MASTER
    interface eth0
    virtual_router_id 90
    priority 100
    advert_int 1
    nopreempt
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        192.168.0.68
    }
}
virtual_server 192.168.1.68 3306 {
    delay_loop 6
    lb_algo wrr
    lb_kind dr
    nat_mask 255.255.255.0
    persistence_timeout 50
    protocol TCP
    real_server 192.168.1.70 3306 {
        weight 1
    notify_down /etc/keepalived/mari.sh #当maridb停止时，执行的脚本
    TCP_CHECK {
            connect_timeout 3
            nb_get_retry 3
            delay_before_retry 3
        }
    }
}
```