CentOS7关闭防火墙和selinux
直接上命令
在root用户下
systemctl stop firewalld
systemctl disable firewalld
systemctl status firewalld
临时关闭selinux
setenforce 0
永久关闭selinux
#vi /etc/selinux/config
把SELINUX=enforcing 改成 SELINUX=disabled
重启电脑就可以了
------------------------------------------------------------------------
安装keepalived
#yum install keepalived -y
Keepalived-MySQL-master服务器配置
#vi /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
# 接收邮件地址
notification_email {
[email protected]
[email protected]
[email protected]
}
# 邮件发送地址
notification_email_from [email protected]
# 本地邮件服务器发邮件
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id MYSQL_HA
}
# vrrp_instance 是一组逻辑分组的 VIP,可以写多个
vrrp_instance VI_1 {
state BACKUP
interface ens33 # 实例工作的网络接口
virtual_router_id 57 # VRRP 路由 ID 实例,每个实例是唯一的
priority 100 # 优先级,备服务器设置 90
advert_int 1 # 指定 VRRP 心跳包通告间隔时间,默认 1 秒
nopreempt
# VRRP 验证块
authentication {
auth_type PASS
auth_pass 1111
}
# VIP 定义块
virtual_ipaddress {
192.168.31.57/24
}
}
virtual_server 192.168.31.57 3306 {
delay_loop 6
protocol TCP
real_server 192.168.31.7 3306 {
notify_down "kill -9 $(cat /var/run/keepalived.pid)"
# 四层健康检查
TCP_CHECK {
connect_port 3306 #连接远程服务器的 TCP 端口
connect_timeout 3 # 连接远程服务器超时时间
nb_get_retry 3 # 最大重试次数
delay_before_retry 3 # 连续两个重试之间的延迟时间
}
}
}
Keepalived-MySQL-backup服务器配置
#vi /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
# 接收邮件地址
notification_email {
[email protected]
[email protected]
[email protected]
}
# 邮件发送地址
notification_email_from [email protected]
# 本地邮件服务器发邮件
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id MYSQL_HA
}
# vrrp_instance 是一组逻辑分组的 VIP,可以写多个
vrrp_instance VI_1 {
state BACKUP
interface ens33 # 实例工作的网络接口
virtual_router_id 57 # VRRP 路由 ID 实例,每个实例是唯一的
priority 90 # 优先级,备服务器设置 90
advert_int 1 # 指定 VRRP 心跳包通告间隔时间,默认 1 秒
# VRRP 验证块
authentication {
auth_type PASS
auth_pass 1111
}
# VIP 定义块
virtual_ipaddress {
192.168.31.57/24
}
}
virtual_server 192.168.31.57 3306 {
delay_loop 6
protocol TCP
real_server 192.168.31.8 3306 {
notify_down "kill -9 $(cat /var/run/keepalived.pid)"
# 四层健康检查
TCP_CHECK {
connect_port 3306 #连接远程服务器的 TCP 端口
connect_timeout 3 # 连接远程服务器超时时间
nb_get_retry 3 # 最大重试次数
delay_before_retry 3 # 连续两个重试之间的延迟时间
}
}
}
启动keepalived
#systemctl start keepalived
Mysql-Mster添加远程登录用户权限
mysql> grant all on *.* to 'root'@'192.168.31.%' identified by '123456';
MySQL实战三:mysql+keepalived实现双机热备
猜你喜欢
转载自blog.csdn.net/qq_28710983/article/details/80938193
今日推荐
周排行