Mysql+keepalive高可用自动切换

时间 2020-05-25

标签 mysql+keepalive mysql keepalive 可用自动切换栏目 MySQL 繁體版

原文原文链接

Keepalive

Keepalived是HA cluster的一种实现方案，其以vrrp协议(Virtual Router Redundancy Protocol，即虚拟路由冗余协议)为实现基础，在N台具备相同功能的路由器或服务器中选出一个master或多个backup，这些路由器或服务器会共用一个对外提供服务的VIP。在此HA cluster集群中，master主机会发送组播来跟backup主机进行通讯确认双方是否存活。当backup主机在指定的时间内没有收到vrrp组播报文则认为master主机宕机了，此时就会在全部的backup主机中根据vrrp协议来选举出新的master主机来保证服务的高可用性。html

一、域名指向，域名只能指向一个固定IP，若是该IP绑定的机器宕机了，那么这个域名便没法访问了；
二、数据库服务指向，应用是经过一个固定的IP链接到数据库，若是该IP宕机，也没法提供服务；

通常主要解决以上两个问题，即keepalived+lvs+nginx和keepalive+mysql等等

keepalived主要有三个模块，分别是ipvs wrapper、checkers和vrrp stack。node

ipvs wrapper模块为keepalived的核心，负责主进程的启动、维护以及全局配置文件的加载和解析。
checkers负责健康检查，包括常见的各类检查方式。
vrrp stack模块是来实现VRRP协议的。
IPVS wrapper 用来发送设定的规则到内核IPVS代码。
Netlink Reflector 用来设定 vrrp 的vip地址等。

一、安装

keepalived源码包下载地址：http://www.keepalived.org/download.htmlmysql

说明文档：https://www.keepalived.org/LVS-NAT-Keepalived-HOWTO.htmlnginx

安装环境es6

# yum install -y openssl-devel popt-devel  curl gcc  libnl3-devel net-snmp-devel  libnfnetlink-devel

下载安装包，主机备机都要安装算法

wget https://www.keepalived.org/software/keepalived-2.0.0.tar.gz

解压缩、编译、安装，过程当中提示缺什么库就安装什么库，而后再从新编译安装。sql

# tar -zxf keepalived-2.0.0.tar.gz # cd keepalived-2.0.0 # ./configure --prefix=/usr/local/keepalived # make && make install # echo $?
0 # # cp /usr/local/keepalived/sbin/keepalived /usr/sbin/ # cp /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/ # cp ./keepalived/etc/init.d/keepalived /etc/init.d/
# mkdir /etc/keepalived
# cp /usr/local/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/

二、配置

keepalived 只有一个配置文件 keepalived.conf，其中包含了三类配置区域。数据库

全局配置 Global Configuration，包含了 global_defs（全局配置标识）、static_ipaddress（静态地址）、static_routes（静态路由）区域配置项。
VRRP 配置，包含了 vrrp_instance（VRRP 实例）、vrrp_sync_group（VRRP 同步组）、vrrp_script（VRRP 脚本）、virtual_server 区域配置项。服务器
- vrrp_instance 用来定义对外提供服务的 VIP 区域及其相关属性。
- vrrp_rsync_group 用来定义 vrrp_intance 组，使得这个组内成员动做一致。例如两个 vrrp_instance 同属于一个 vrrp_rsync_group，那么其中一个vrrp_instance 发生故障切换时，另外一个 vrrp_instance 也会跟着切换（即便这个 instance 没有发生故障）
vrrp_script 区域app
- 用来作健康检查，当时检查失败时会将 vrrp_instance 的 priority 减小相应的值。
- 首先在 vrrp_script 区域定义脚本名字和脚本执行的间隔和脚本执行的优先级变动。而后在实例 vrrp_instance 里面引用，有点相似脚本里面的函数引用同样：先定义，后引用函数名。

master

[root@nginx ~]# cat /etc/keepalived/keepalived.conf global_defs { notification_email { #故障发生时给谁发邮件通知。 root@localhost root@192.168.10.18 } notification_email_from keepalived@localhost #通知邮件的发出地址。 smtp_server 127.0.0.1 #发现Email的smtp地址 smtp_connect_timeout 30 #超时时间 router_id node1 #运行keepalived的机器标识号，主从机必须不一样 } vrrp_instance VI_1 { state MASTER #能够是 MASTER 或 BACKUP，不过当其余节点 keepalived 启动时
 #会将 Priority（优先级）比较大的节点选举为 MASTER，所以该项其实没有实质用途。 interface eth1 #本机物理网卡，节点固有 IP（非 VIP）的网卡，用来发 VRRP 包。 lvs_sync_daemon_inteface eth1 #绑定 lvs syncd 的网卡。 virtual_router_id 151 #虚拟路由，主从机必需一致。设置 VRID，取值在 0-255 之间，用来区分多个 instance 的 VRRP 组播
 #（同一网段中 virtual_router_id 的值不能重复，不然会出错）。
 #将决定多播的 MAC 地址 priority 100 #用来选举 master，要成为 master，这个选项的值最好高于其余机器 50 个点，
 #该项取值范围是 1-255（在此范围以外会被识别成默认值 100）。 advert_int 5 #发 VRRP 包的时间间隔，即多久进行一次 master 选举（能够认为是健康查检时间间隔，默认为 1 秒）。 authentication { #认证区域，保持master和backup一致 auth_type PASS auth_pass 123456 } virtual_ipaddress { #VIP（虚拟 IP 地址），随着 state 的变化而增长删除，
 #当 state 为 master 的时候就添加，当 state 为 backup 的时候删除，
 #主要由优先级来决定的，和 state 设置的值没有多大关系，能够设置多个 IP 地址。 192.168.100.100 dev eth1 } } virtual_server 192.168.100.100 3306 { #LVS配置，VIP delay_loop 6 #服务轮询的时间间隔 lb_algo wrr #LVS 调度算法 lb_kind DR　　　　　　　　　　　　　　　　　　　　 #LVS 集群算法 persistence_timeout 60 #同一IP的连接50秒内被分配到同一台realserver protocol TCP #用TCP协议检查realserver状态 real_server 192.168.10.18 3306 { #实际服务器的IP和端口 weight 100 notify_down /data/sh/mysql.sh TCP_CHECK { connect_timeout 10 nb_get_retry 3 delay_before_retry 3 connect_port 3306 } } } [root@nginx ~]#

backup

[root@mysql ~]# [root@mysql ~]# cat /etc/keepalived/keepalived.conf global_defs { notification_email { root@localhost root@192.168.10.18 } notification_email_from keepalived@localhost smtp_server 127.0.0.1 smtp_connect_timeout 30 router_id node2 } vrrp_instance VI_1 { state BACKUP interface eth1 lvs_sync_daemon_inteface eth1 virtual_router_id 151 priority 90 advert_int 5 authentication { auth_type PASS auth_pass 123456 } virtual_ipaddress { 192.168.100.100 dev eth1 } } virtual_server 192.168.100.100 3306 { delay_loop 6 lb_algo wrr lb_kind DR persistence_timeout 60 protocol TCP real_server 192.168.10.23 3306 { weight 100 notify_down /data/sh/mysql.sh TCP_CHECK { connect_timeout 10 nb_get_retry 3 delay_before_retry 3 connect_port 3306 } } } [root@mysql ~]#

在两端/data/sh/mysql.sh创建关闭keepalived的脚本

[root@mysql ~]# cat /data/sh/mysql.sh pkill keepalived [root@mysql ~]#

三、启动

master和backup都启动keepalived服务

[root@nginx ~]# service keepalived start Starting keepalived: [ OK ] [root@nginx ~]# [root@nginx ~]# ps -ef | grep keep root 127942      1  0 12:27 ?        00:00:00 keepalived -D root 127944 127942  0 12:27 ?        00:00:00 keepalived -D root 127945 127942  0 12:27 ?        00:00:00 keepalived -D root 130062 130014  0 14:27 pts/0    00:00:00 grep keep [root@nginx ~]# [root@nginx ~]# [root@nginx ~]# netstat -lantup | grep keep [root@nginx ~]#

[root@mysql ~]# /etc/init.d/keepalived restart Stopping keepalived: [ OK ] Starting keepalived: [ OK ] [root@mysql ~]# ps -ef | grep keep root 49218      1  0 12:01 ?        00:00:00 keepalived -D root 49220  49218  0 12:01 ?        00:00:00 keepalived -D root 49221  49218  0 12:01 ?        00:00:00 keepalived -D root 49223  48581  0 12:01 pts/3    00:00:00 grep keep [root@mysql ~]# [root@mysql ~]# netstat -lantup | grep keep tcp 0      1 192.168.10.23:58138         192.168.33.23:3306          SYN_SENT    49220/keepalived [root@mysql ~]#

查看两端的虚拟IP启动状况，系统日志

Master端

[root@nginx ~]# ip addr 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 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: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 00:0c:29:69:6e:c1 brd ff:ff:ff:ff:ff:ff inet 192.168.10.18/24 brd 192.168.10.255 scope global eth1  inet 192.168.100.100/32 scope global eth1 inet6 fe80::20c:29ff:fe69:6ec1/64 scope link valid_lft forever preferred_lft forever [root@nginx ~]#

虚拟IP：192.168.100.100已经成功启动

[root@nginx ~]# tail -fn 10 /var/log/messages6 Sep 20 15:13:22 nginx Keepalived_healthcheckers[419]: TCP connection to [192.168.10.18]:tcp:3306 success. Sep 20 15:13:32 nginx Keepalived_vrrp[420]: (VI_1) Entering MASTER STATE Sep 20 15:13:32 nginx Keepalived_vrrp[420]: (VI_1) setting protocol VIPs. Sep 20 15:13:32 nginx Keepalived_vrrp[420]: Sending gratuitous ARP on eth1 for 192.168.100.100 Sep 20 15:13:32 nginx Keepalived_vrrp[420]: (VI_1) Sending/queueing gratuitous ARPs on eth1 for 192.168.100.100 Sep 20 15:13:32 nginx Keepalived_vrrp[420]: Sending gratuitous ARP on eth1 for 192.168.100.100 Sep 20 15:13:32 nginx Keepalived_vrrp[420]: Sending gratuitous ARP on eth1 for 192.168.100.100 Sep 20 15:13:32 nginx Keepalived_vrrp[420]: Sending gratuitous ARP on eth1 for 192.168.100.100

说明已经成功做为MASTER启动，且发送ARP包传输

backup端

[root@mysql ~]# tail -fn 10 /var/log/messages Sep 20 15:25:37 mysql Keepalived_healthcheckers[52339]: WARNING - default user 'keepalived_script' for script execution does not exist - please create. Sep 20 15:25:37 mysql Keepalived_healthcheckers[52339]: Unknown keyword 'nb_get_retry' Sep 20 15:25:37 mysql Keepalived_healthcheckers[52339]: Please add a #! shebang to script /data/sh/mysql.sh Sep 20 15:25:37 mysql Keepalived_vrrp[52340]: (VI_1) removing protocol VIPs. Sep 20 15:25:37 mysql Keepalived_vrrp[52340]: (VI_1) Entering BACKUP STATE (init) Sep 20 15:25:37 mysql Keepalived_healthcheckers[52339]: SECURITY VIOLATION - check scripts are being executed but script_security not enabled. Sep 20 15:25:37 mysql Keepalived_healthcheckers[52339]: Gained quorum 1+0=1 <= 100 for VS [192.168.100.100]:tcp:3306 Sep 20 15:25:37 mysql Keepalived_healthcheckers[52339]: Activating healthchecker for service [192.168.10.23]:tcp:3306 for VS [192.168.100.100]:tcp:3306 Sep 20 15:25:37 mysql Keepalived_vrrp[52340]: VRRP sockpool: [ifindex(2), proto(112), unicast(0), fd(8,9)] Sep 20 15:25:43 mysql Keepalived_healthcheckers[52339]: TCP connection to [192.168.10.23]:tcp:3306 success.

 (VI_1) Entering BACKUP STATE (init)已做为backup机启用

[root@mysql ~]# ip addr 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 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: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 00:0c:29:ad:ad:54 brd ff:ff:ff:ff:ff:ff inet 192.168.10.23/24 brd 192.168.10.255 scope global eth1 inet6 fe80::20c:29ff:fead:ad54/64 scope link valid_lft forever preferred_lft forever [root@mysql ~]#

backup的IP状况

四、测试

当Master的MySQL服务意外挂掉后，会自动启用backup的Mysql继续为系统提供支持。

[root@nginx ~]# service mysqld stop Stopping mysqld: [ OK ] [root@nginx ~]# [root@nginx ~]# [root@nginx ~]# ip addr 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 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: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 00:0c:29:69:6e:c1 brd ff:ff:ff:ff:ff:ff inet 192.168.10.18/24 brd 192.168.10.255 scope global eth1 inet6 fe80::20c:29ff:fe69:6ec1/64 scope link valid_lft forever preferred_lft forever [root@nginx ~]# [root@nginx ~]# [root@nginx ~]# [root@nginx ~]# tail -fn 10 /var/log/messages Sep 20 15:36:44 nginx Keepalived_healthcheckers[419]: Error processing RCPT cmd on SMTP server [127.0.0.1]:25. SMTP status code = 501 Sep 20 15:36:44 nginx Keepalived_healthcheckers[419]: Can not read data from remote SMTP server [127.0.0.1]:25. Sep 20 15:36:44 nginx Keepalived[417]: Stopping Sep 20 15:36:44 nginx kernel: IPVS: __ip_vs_del_service: enter Sep 20 15:36:44 nginx Keepalived_vrrp[420]: (VI_1) sent 0 priority Sep 20 15:36:44 nginx Keepalived_vrrp[420]: (VI_1) removing protocol VIPs. Sep 20 15:36:44 nginx Keepalived_healthcheckers[419]: Shutting down service [192.168.10.18]:tcp:3306 from VS [192.168.100.100]:tcp:3306 Sep 20 15:36:44 nginx Keepalived_healthcheckers[419]: Stopped Sep 20 15:36:45 nginx Keepalived_vrrp[420]: Stopped Sep 20 15:36:45 nginx Keepalived[417]: Stopped Keepalived v2.0.0 (05/27,2018) ^C [root@nginx ~]# ps -ef  | grep keep root 1127 130014  0 15:40 pts/0    00:00:00 grep keep [root@nginx ~]#

Master 测试关闭mysql服务，虚拟IP中止发送ARP包，keepalived服务终止

[root@mysql ~]# ip addr 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 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: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 00:0c:29:ad:ad:54 brd ff:ff:ff:ff:ff:ff inet 192.168.10.23/24 brd 192.168.10.255 scope global eth1 inet 192.168.100.100/32 scope global eth1 inet6 fe80::20c:29ff:fead:ad54/64 scope link valid_lft forever preferred_lft forever [root@mysql ~]# [root@mysql ~]# tail -fn 20 /var/log/messages Sep 20 15:25:37 mysql Keepalived_healthcheckers[52339]: SECURITY VIOLATION - check scripts are being executed but script_security not enabled. Sep 20 15:25:37 mysql Keepalived_healthcheckers[52339]: Gained quorum 1+0=1 <= 100 for VS [192.168.100.100]:tcp:3306 Sep 20 15:25:37 mysql Keepalived_healthcheckers[52339]: Activating healthchecker for service [192.168.10.23]:tcp:3306 for VS [192.168.100.100]:tcp:3306 Sep 20 15:25:37 mysql Keepalived_vrrp[52340]: VRRP sockpool: [ifindex(2), proto(112), unicast(0), fd(8,9)] Sep 20 15:25:43 mysql Keepalived_healthcheckers[52339]: TCP connection to [192.168.10.23]:tcp:3306 success. Sep 20 15:36:44 mysql Keepalived_vrrp[52340]: (VI_1) Backup received priority 0 advertisement Sep 20 15:36:45 mysql Keepalived_vrrp[52340]: (VI_1) Entering MASTER STATE Sep 20 15:36:45 mysql Keepalived_vrrp[52340]: (VI_1) setting protocol VIPs. Sep 20 15:36:45 mysql Keepalived_vrrp[52340]: Sending gratuitous ARP on eth1 for 192.168.100.100 Sep 20 15:36:45 mysql Keepalived_vrrp[52340]: (VI_1) Sending/queueing gratuitous ARPs on eth1 for 192.168.100.100 Sep 20 15:36:45 mysql Keepalived_vrrp[52340]: Sending gratuitous ARP on eth1 for 192.168.100.100 Sep 20 15:36:45 mysql Keepalived_vrrp[52340]: Sending gratuitous ARP on eth1 for 192.168.100.100 Sep 20 15:36:45 mysql Keepalived_vrrp[52340]: Sending gratuitous ARP on eth1 for 192.168.100.100 Sep 20 15:36:45 mysql Keepalived_vrrp[52340]: Sending gratuitous ARP on eth1 for 192.168.100.100 Sep 20 15:36:50 mysql Keepalived_vrrp[52340]: Sending gratuitous ARP on eth1 for 192.168.100.100 Sep 20 15:36:50 mysql Keepalived_vrrp[52340]: (VI_1) Sending/queueing gratuitous ARPs on eth1 for 192.168.100.100 Sep 20 15:36:50 mysql Keepalived_vrrp[52340]: Sending gratuitous ARP on eth1 for 192.168.100.100 Sep 20 15:36:50 mysql Keepalived_vrrp[52340]: Sending gratuitous ARP on eth1 for 192.168.100.100 Sep 20 15:36:50 mysql Keepalived_vrrp[52340]: Sending gratuitous ARP on eth1 for 192.168.100.100 Sep 20 15:36:50 mysql Keepalived_vrrp[52340]: Sending gratuitous ARP on eth1 for 192.168.100.100 ps^C [root@mysql ~]# [root@mysql ~]# ps -ef | grep keepalived root 52337      1  0 15:25 ?        00:00:00 keepalived -D root 52339  52337  0 15:25 ?        00:00:00 keepalived -D root 52340  52337  0 15:25 ?        00:00:00 keepalived -D root 52760  51101  0 15:42 pts/0    00:00:00 grep keepalived [root@mysql ~]#

(VI_1) Entering MASTER STATE，backup机成为Master，继续为系统提供mysql服务，测试成功。
重启Master主机的mysql服务后，Master主机从新成为master，备机从新成为备机

[root@nginx ~]# [root@nginx ~]# service keepalived restasrt Usage: /etc/init.d/keepalived {start|stop|reload|restart|condrestart|status} [root@nginx ~]# service keepalived restart Stopping keepalived: [FAILED] Starting keepalived: [ OK ] [root@nginx ~]# [root@nginx ~]# [root@nginx ~]# [root@nginx ~]# tail -fn 10 /var/log/messages Sep 20 15:44:35 nginx Keepalived_healthcheckers[1409]: Gained quorum 1+0=1 <= 100 for VS [192.168.100.100]:tcp:3306 Sep 20 15:44:35 nginx Keepalived_vrrp[1410]: Unknown keyword 'lvs_sync_daemon_inteface' Sep 20 15:44:35 nginx Keepalived_vrrp[1410]: Assigned address 192.168.10.18 for interface eth1 Sep 20 15:44:35 nginx Keepalived_healthcheckers[1409]: Activating healthchecker for service [192.168.10.18]:tcp:3306 for VS [192.168.100.100]:tcp:3306 Sep 20 15:44:35 nginx Keepalived_vrrp[1410]: Assigned address fe80::20c:29ff:fe69:6ec1 for interface eth1 Sep 20 15:44:35 nginx Keepalived_vrrp[1410]: Registering gratuitous ARP shared channel Sep 20 15:44:35 nginx Keepalived_vrrp[1410]: (VI_1) removing protocol VIPs. Sep 20 15:44:35 nginx Keepalived_vrrp[1410]: (VI_1) Entering BACKUP STATE (init) Sep 20 15:44:35 nginx Keepalived_vrrp[1410]: VRRP sockpool: [ifindex(2), proto(112), unicast(0), fd(8,9)] Sep 20 15:44:36 nginx Keepalived_vrrp[1410]: (VI_1) received lower priority (90) advert from 192.168.10.23 - discarding Sep 20 15:44:41 nginx Keepalived_vrrp[1410]: (VI_1) received lower priority (90) advert from 192.168.10.23 - discarding Sep 20 15:44:41 nginx Keepalived_healthcheckers[1409]: TCP connection to [192.168.10.18]:tcp:3306 success. Sep 20 15:44:46 nginx Keepalived_vrrp[1410]: (VI_1) received lower priority (90) advert from 192.168.10.23 - discarding Sep 20 15:44:50 nginx Keepalived_vrrp[1410]: (VI_1) Entering MASTER STATE Sep 20 15:44:50 nginx Keepalived_vrrp[1410]: (VI_1) setting protocol VIPs. Sep 20 15:44:50 nginx Keepalived_vrrp[1410]: Sending gratuitous ARP on eth1 for 192.168.100.100 Sep 20 15:44:50 nginx Keepalived_vrrp[1410]: (VI_1) Sending/queueing gratuitous ARPs on eth1 for 192.168.100.100 Sep 20 15:44:50 nginx Keepalived_vrrp[1410]: Sending gratuitous ARP on eth1 for 192.168.100.100 Sep 20 15:44:50 nginx Keepalived_vrrp[1410]: Sending gratuitous ARP on eth1 for 192.168.100.100 Sep 20 15:44:50 nginx Keepalived_vrrp[1410]: Sending gratuitous ARP on eth1 for 192.168.100.100 Sep 20 15:44:50 nginx Keepalived_vrrp[1410]: Sending gratuitous ARP on eth1 for 192.168.100.100 Sep 20 15:44:55 nginx Keepalived_vrrp[1410]: Sending gratuitous ARP on eth1 for 192.168.100.100 Sep 20 15:44:55 nginx Keepalived_vrrp[1410]: (VI_1) Sending/queueing gratuitous ARPs on eth1 for 192.168.100.100 Sep 20 15:44:55 nginx Keepalived_vrrp[1410]: Sending gratuitous ARP on eth1 for 192.168.100.100 Sep 20 15:44:55 nginx Keepalived_vrrp[1410]: Sending gratuitous ARP on eth1 for 192.168.100.100 Sep 20 15:44:55 nginx Keepalived_vrrp[1410]: Sending gratuitous ARP on eth1 for 192.168.100.100 Sep 20 15:44:55 nginx Keepalived_vrrp[1410]: Sending gratuitous ARP on eth1 for 192.168.100.100
^C [root@nginx ~]# ip addr 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 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: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 00:0c:29:69:6e:c1 brd ff:ff:ff:ff:ff:ff inet 192.168.10.18/24 brd 192.168.10.255 scope global eth1 inet 192.168.100.100/32 scope global eth1 inet6 fe80::20c:29ff:fe69:6ec1/64 scope link valid_lft forever preferred_lft forever [root@nginx ~]#

[root@mysql ~]# [root@mysql ~]# tail -fn 20 /var/log/messages Sep 20 15:25:37 mysql Keepalived_vrrp[52340]: VRRP sockpool: [ifindex(2), proto(112), unicast(0), fd(8,9)] Sep 20 15:25:43 mysql Keepalived_healthcheckers[52339]: TCP connection to [192.168.10.23]:tcp:3306 success. Sep 20 15:36:44 mysql Keepalived_vrrp[52340]: (VI_1) Backup received priority 0 advertisement Sep 20 15:36:45 mysql Keepalived_vrrp[52340]: (VI_1) Entering MASTER STATE Sep 20 15:36:45 mysql Keepalived_vrrp[52340]: (VI_1) setting protocol VIPs. Sep 20 15:36:45 mysql Keepalived_vrrp[52340]: Sending gratuitous ARP on eth1 for 192.168.100.100 Sep 20 15:36:45 mysql Keepalived_vrrp[52340]: (VI_1) Sending/queueing gratuitous ARPs on eth1 for 192.168.100.100 Sep 20 15:36:45 mysql Keepalived_vrrp[52340]: Sending gratuitous ARP on eth1 for 192.168.100.100 Sep 20 15:36:45 mysql Keepalived_vrrp[52340]: Sending gratuitous ARP on eth1 for 192.168.100.100 Sep 20 15:36:45 mysql Keepalived_vrrp[52340]: Sending gratuitous ARP on eth1 for 192.168.100.100 Sep 20 15:36:45 mysql Keepalived_vrrp[52340]: Sending gratuitous ARP on eth1 for 192.168.100.100 Sep 20 15:36:50 mysql Keepalived_vrrp[52340]: Sending gratuitous ARP on eth1 for 192.168.100.100 Sep 20 15:36:50 mysql Keepalived_vrrp[52340]: (VI_1) Sending/queueing gratuitous ARPs on eth1 for 192.168.100.100 Sep 20 15:36:50 mysql Keepalived_vrrp[52340]: Sending gratuitous ARP on eth1 for 192.168.100.100 Sep 20 15:36:50 mysql Keepalived_vrrp[52340]: Sending gratuitous ARP on eth1 for 192.168.100.100 Sep 20 15:36:50 mysql Keepalived_vrrp[52340]: Sending gratuitous ARP on eth1 for 192.168.100.100 Sep 20 15:36:50 mysql Keepalived_vrrp[52340]: Sending gratuitous ARP on eth1 for 192.168.100.100 Sep 20 15:44:50 mysql Keepalived_vrrp[52340]: (VI_1) Master received advert from 192.168.10.18 with higher priority 100, ours 90 Sep 20 15:44:50 mysql Keepalived_vrrp[52340]: (VI_1) Entering BACKUP STATE Sep 20 15:44:50 mysql Keepalived_vrrp[52340]: (VI_1) removing protocol VIPs. ^C [root@mysql ~]# ip addr 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 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: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 00:0c:29:ad:ad:54 brd ff:ff:ff:ff:ff:ff inet 192.168.10.23/24 brd 192.168.10.255 scope global eth1 inet6 fe80::20c:29ff:fead:ad54/64 scope link valid_lft forever preferred_lft forever [root@mysql ~]#