Keepalived+mysql高可用
DB1： 192.168.10.13:3358
DB2： 192.168.10.14：3358
VIP： 192.168.10.100：3358
注意： /etc/my.cnf中，bind_address注销掉，或者改为0.0.0.0
（mysql已安装完毕，并配置了主-主关系）
安装环境：
yum install -y keepalived
yum install -y ipvsadm
10.13上配置keepalived /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
[email protected]
[email protected]
[email protected] #加上自己邮箱地址
}
notification_email_from [email protected] #发件人
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 51
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.10.100
}
}
virtual_server 192.168.10.100 3358 {
delay_loop 6
lb_algo rr
lb_kind DR
nat_mask 255.255.255.0
persistence_timeout 50
protocol TCP
real_server 192.168.10.13 3358 {
weight 1
notify_down /root/shutdown.sh #当3358端口检测失败的时候执行脚本
TCP_CHECK {
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
connect_port 3358
}
}
}10.14上配置keepalived /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
[email protected]
[email protected]
[email protected]
}
notification_email_from [email protected]
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 51
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.10.100
}
}
virtual_server 192.168.10.100 3358 {
delay_loop 6
lb_algo rr
lb_kind DR
nat_mask 255.255.255.0
persistence_timeout 50
protocol TCP
real_server 192.168.10.14 3358 {
weight 1
notify_down /root/shutdown.sh
TCP_CHECK {
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
connect_port 3358
}
}
}注意： 2台只是real_server不一样，其他的都一样；
2台的/root/下防止shutdown.sh脚本，用于在3358端口无法访问的时候停掉keepalived，并授予可执行权限
[[email protected] ~]#cat shutdown.sh
#!/bin/bash
pkill keepalived
[[email protected] ~]#ll shutdown.sh
-rwxr-xr-x 1 root root 29 Aug 9 09:43 shutdown.sh新建用户用于测试连接用，因为是主主架构，任意一台DB执行下面即可：
mysql> create user wang@'%' identified by '123456';
Query OK, 0 rows affected (0.01 sec)
mysql> grant all privileges on *.* to wang@'%';
Query OK, 0 rows affected (0.01 sec)
mysql>
mysql> flush privileges;
Query OK, 0 rows affected (0.05 sec)
mysql> show grants for wang@'%';
+-------------------------------------------+
| Grants for wang@% |
+-------------------------------------------+
| GRANT ALL PRIVILEGES ON *.* TO 'wang'@'%' |
+-------------------------------------------+
1 row in set (0.00 sec)
确认主主：
mysql> select @@hostname;
+---------------+
| @@hostname |
+---------------+
| 192.168.10.13 |
+---------------+
1 row in set (0.00 sec)
mysql> show slave status \G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.10.14
Master_User: wang
Master_Port: 3358
Connect_Retry: 10
Master_Log_File: mysql-bin.000012
Read_Master_Log_Pos: 154
Relay_Log_File: 192-relay-bin.000002
Relay_Log_Pos: 320
Relay_Master_Log_File: mysql-bin.000012
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
Replicate_Do_DB:
.........................mysql> select @@hostname;
+---------------+
| @@hostname |
+---------------+
| 192.168.10.14 |
+---------------+
1 row in set (0.00 sec)
mysql> show slave status \G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.10.13
Master_User: wang
Master_Port: 3358
Connect_Retry: 10
Master_Log_File: mysql-bin.000013
Read_Master_Log_Pos: 1051
Relay_Log_File: 192-relay-bin.000005
Relay_Log_Pos: 1264
Relay_Master_Log_File: mysql-bin.000013
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
............................启动2台DB的keepalived
[[email protected] ~]#service keepalived start
Starting keepalived: [ OK ]查看2台DB的lvs信息：
[[email protected] ~]#ipvsadm -L -n
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 192.168.10.100:3358 rr persistent 50
-> 192.168.10.13:3358 Local 1 1 0[[email protected] ~]#ipvsadm -L -n
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 192.168.10.100:3358 rr persistent 50
-> 192.168.10.14:3358 Local 1 1 0验证：
在Client上连接VIP 192.168.10.100
[[email protected] ~]#mysql -h 192.168.10.100 -uwang -p123456
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 32
Server version: 5.7.19-log MySQL Community Server (GPL)
Copyright (c) 2000, 2017, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> select @@hostname;
+---------------+
| @@hostname |
+---------------+
| 192.168.10.14 |
+---------------+
1 row in set (0.00 sec)
mysql>通过VIP 192.168.10.100地址，成功连接到了192.168.10.14；
加入现在192.168.10.14发生了故障，我们手动把192.168.10.14的mysql服务停止；然后再次启动一个mysql连接
[[email protected] ~]#
[[email protected] ~]#service mysql stop
Shutting down MySQL............ SUCCESS!
[[email protected] ~]#[[email protected] ~]#mysql -h 192.168.10.100 -uwang -p123456
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 66
Server version: 5.7.19-log MySQL Community Server (GPL)
Copyright (c) 2000, 2017, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> select @@hostname;
+---------------+
| @@hostname |
+---------------+
| 192.168.10.13 |
+---------------+
1 row in set (0.01 sec)
mysql>看到现在连在了10.13上；
加入10.14故障修复了，启动mysql服务和keepalived 服务
[[email protected] ~]#service mysql start
Starting MySQL.. SUCCESS!
[[email protected] ~]#service keepalived start
Starting keepalived: [ OK ]
[[email protected] ~]#然后我们再吧192.168.10.13模拟故障，手动停止，可以看到又连到了14上
[[email protected] ~]#service mysql stop
Shutting down MySQL............ SUCCESS!
[[email protected] ~]#[[email protected] ~]#mysql -h 192.168.10.100 -uwang -p123456
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 45
Server version: 5.7.19-log MySQL Community Server (GPL)
Copyright (c) 2000, 2017, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> select @@hostname;
+---------------+
| @@hostname |
+---------------+
| 192.168.10.14 |
+---------------+
1 row in set (0.00 sec)
outlook也收到了对应的告警邮件
