基于keepalived雙主熱備:

一.環境:

OS:CentOS 6.5 X64

DB Version:Percona Mysql 5.7.15-9-log

路徑:/app/mysql57

數據文件路徑:/data/mysql57/data

DB1:192.168.213.4

DB2:192.168.213.5

二.安裝keepalived包(兩臺主機都需操作)

1.下載keepalived包

cd /usr/local/tools

wget http://www.keepalived.org/software/keepalived-1.2.23.tar.gz

2.安裝所需包

yum -y install openssl-devel

3.安裝keepalived

mkdir -pv /app/keepalived

cd /usr/local/tools

tar xf keepalived-1.2.23.tar.gz

cd keepalived-1.2.23

./configure --prefix=/app/keepalived/

make

make install

4.配置keepalived

cp /app/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf

cp /app/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/keepalived

cp /app/keepalived/etc/sysconfig/keepalived /etc/sysconfig/

cp /app/keepalived/sbin/keepalived /usr/sbin/

db01 keepalived配置

cat /etc/keepalived/keepalived.conf

! Configuration File for keepalived

global_defs {

router_id HA_MYSQL

}

vrrp_script chk_mysql {

script "/etc/init.d/mysql57 status"

}

vrrp_instance VI_1 {

state MASTER

interface eth0 ? ?!虛擬IP對應接口,也就是業務接口對應的網卡編號

virtual_router_id 51

priority 105 ? ?!權重

advert_int 1

nopreempt ? ?!自己上線后不搶占當前 master 的位置，即使其權重比自己低

virtual_ipaddress {

192.168.213.100 ? ?!VIP

}

track_script {

chk_mysql ? ?!啟用頭部定義的檢查MySQL狀態的腳本

}

}

virtual_server 192.168.213.100 3306 {

delay_loop 3

lb_algo rr

lb_kind NAT

persistence_timeout 60

protocol TCP ? ?sorry_server 192.168.213.5 3306 ? ?! real_server 掛掉后臨時使用 sorry_server 頂上

real_server 192.168.213.4 3306 {

weight 1

TCP_CHECK {

connect_port ? ?3306

connect_timeout 3

}

}

}

db02 keepalived配置

[root@ORADB-213-5 ~]# cat /etc/keepalived/keepalived.conf

! Configuration File for keepalived

global_defs {

router_id HA_MYSQL

}

vrrp_script chk_mysql {

script "/etc/init.d/mysql57 status"

}

vrrp_instance VI_1 {

state BACKUP

interface eth0 ? ?!虛擬IP對應接口,也就是業務接口對應的網卡編號

virtual_router_id 51

priority 100 ? ?!權重

advert_int 1

nopreempt ? ?!自己上線后不搶占當前 master 的位置，即使其權重比自己低

virtual_ipaddress {

192.168.213.100 ? ?!VIP

}

track_script {

chk_mysql ? ?!啟用頭部定義的檢查MySQL狀態的腳本

}

}

virtual_server 192.168.213.100 3306 {

delay_loop 3

lb_algo rr

lb_kind NAT

persistence_timeout 60

protocol TCP ? ?sorry_server 192.168.213.4 3306 ? ?! real_server 掛掉后臨時使用 sorry_server 頂上

real_server 192.168.213.5 3306 {

weight 1

TCP_CHECK {

connect_port ? ?3306

connect_timeout 3

}

}

}

5.兩臺DB啟動keepalived

/etc/init.d/keepalived start

查看VIP

[root@ORA11G-213-4 keepalived-1.2.23]# ip addr

1: lo: mtu 16436 qdisc noqueue state UNKNOWN

link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

inet 127.0.0.1/8 scope host lo

inet6 ::1/128 scope host

valid_lft forever preferred_lft forever

2: eth0: mtu 1500 qdisc pfifo_fast state UP qlen 1000

link/ether 00:0c:29:c7:d5:27 brd ff:ff:ff:ff:ff:ff

inet 192.168.213.4/24 brd 192.168.213.255 scope global eth0

inet 192.168.213.100/32 scope global eth0

inet6 fe80::20c:29ff:fec7:d527/64 scope link

valid_lft forever preferred_lft forever

測試

[root@ORA11G-213-4 keepalived-1.2.23]# mysql -unetdata -pnetdata -h 192.168.213.100

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 2881

Server version: 5.7.15-9-log Source distribution

Copyright (c) 2000, 2016, 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.

netdata@192.168.213.100 23:41: ?[(none)]> system ifconfig

eth0 ? ? ?Link encap:Ethernet ?HWaddr 00:0C:29:C7:D5:27

inet addr:192.168.213.4 ?Bcast:192.168.213.255 ?Mask:255.255.255.0

inet6 addr: fe80::20c:29ff:fec7:d527/64 Scope:Link

UP BROADCAST RUNNING MULTICAST ?MTU:1500 ?Metric:1

RX packets:156643 errors:0 dropped:0 overruns:0 frame:0

TX packets:191173 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:1000

RX bytes:39459924 (37.6 MiB) ?TX bytes:31911844 (30.4 MiB)

lo ? ? ? ?Link encap:Local Loopback

inet addr:127.0.0.1 ?Mask:255.0.0.0

inet6 addr: ::1/128 Scope:Host

UP LOOPBACK RUNNING ?MTU:16436 ?Metric:1

RX packets:17378 errors:0 dropped:0 overruns:0 frame:0

TX packets:17378 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:0

RX bytes:1002566 (979.0 KiB) ?TX bytes:1002566 (979.0 KiB)

停止掉db01

[root@ORA11G-213-4 keepalived-1.2.23]# /etc/init.d/mysql57 stop

Shutting down MySQL (Percona Server)............. SUCCESS!

查看db02

[root@ORADB-213-5 ~]# ip addr

1: lo: mtu 16436 qdisc noqueue state UNKNOWN

link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

inet 127.0.0.1/8 scope host lo

inet6 ::1/128 scope host

valid_lft forever preferred_lft forever

2: eth0: mtu 1500 qdisc pfifo_fast state UP qlen 1000

link/ether 00:0c:29:63:54:39 brd ff:ff:ff:ff:ff:ff

inet 192.168.213.5/24 brd 192.168.213.255 scope global eth0

inet 192.168.213.100/32 scope global eth0

inet6 fe80::20c:29ff:fe63:5439/64 scope link

valid_lft forever preferred_lft forever

VIP已經飄移過來

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