Heartbeat+Haproxy实现负载均衡高可用

时间:2022-05-20 23:16:28
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环境说明:

主机名 角色 IP地址
mylinux1.contoso.com heartbeat+haproxy

eth0:192.168.100.121

eth1:172.16.100.121

mylinux2.contoso.com heartbeat+haproxy

eth0:192.168.100.122

eth1:172.16.100.122

mylinux3.contoso.com web server 1 eth0:192.168.100.181
mylinux4.contoso.com web server 2 eth0:192.168.100.182

一、环境准备

在mylinux1和mylinux2上安装heartbeat,可以手动安装,当然也可以使用前面发布的一篇heartbeat脚本的博文,里面有heartbeat快速安装脚本。

然后在mylinux2上安装haproxy,并将mylinux1上的haproxy配置文件和启停脚本都拷贝到mylinux2上。

要保证mylinux1和mylinux2的heartbeat+haproxy环境一致。

123456789101112 [root@mylinux1 ~]# scp /etc/init.d/haproxy mylinux2:/etc/init.d/root@mylinux2's password: Permission denied, please try again.root@mylinux2's password: haproxy                                       100% 1567     1.5KB/s   00:00    [root@mylinux1 ~]# scp /usr/local/haproxy/conf/haproxy.cfg mylinux2:/usr/local/haproxy/conf/haproxy.cfgroot@mylinux2's password: haproxy.cfg                                   100% 1194     1.2KB/s   00:00   [root@mylinux2 haproxy]# ll /etc/init.d/haproxy -rwxr-xr-x 1 root root 1567 Oct  1 02:11 /etc/init.d/haproxy[root@mylinux2 haproxy]# ll /usr/local/haproxy/conf/haproxy.cfg -rw-r--r-- 1 root root 1194 Oct  1 02:13 /usr/local/haproxy/conf/haproxy.cfg

二、修改heartbeat的资源文件

1234 [root@mylinux1 ~]# tail -1 /etc/ha.d/haresources mylinux1.contoso.com IPaddr::192.168.100.120/24/eth0 haproxy[root@mylinux2 haproxy]# tail -1 /etc/ha.d/haresources mylinux1.contoso.com IPaddr::192.168.100.120/24/eth0 haproxy

这里还是贴出两个heartbeat节点的ha.cf配置,如下:

12345678910111213141516171819202122232425262728 [root@mylinux1 ~]# egrep -v "#|^$" /etc/ha.d/ha.cfdebugfile /var/log/ha-debuglogfile/var/log/ha-loglogfacilitylocal1keepalive 2deadtime 30warntime 10initdead 120udpport694mcast eth1 225.0.0.1 694 1 0auto_failback onnodemylinux1.contoso.comnodemylinux2.contoso.comrespawn hacluster /usr/lib64/heartbeat/ipfail[root@mylinux2 haproxy]# egrep -v "#|^$" /etc/ha.d/ha.cf debugfile /var/log/ha-debuglogfile/var/log/ha-loglogfacilitylocal1keepalive 2deadtime 30warntime 10initdead 120udpport694mcast eth1 225.0.0.1 694 1 0auto_failback onnode    mylinux1.contoso.comnode    mylinux2.contoso.comrespawn hacluster /usr/lib64/heartbeat/ipfail

三、启动heartbeat服务

1、首先在mylinux1和mylinux2上先关闭haproxy服务

1234 [root@mylinux1 ~]# service haproxy stopStop haproxy successful.[root@mylinux2 haproxy]# service haproxy stopHaproxy is not running. Stop haproxy failed!

2、依次启动mylinux1和mylinux2上的heartbeat服务

123456 [root@mylinux1 ~]# /etc/init.d/heartbeat startStarting High-Availability services: INFO:  Resource is stoppedDone.[root@mylinux2 haproxy]# /etc/init.d/heartbeat startStarting High-Availability services: INFO:  Resource is stoppedDone.

四、测试haproxy的高可用

1、首先,检查mylinux1的状态

1234 [root@mylinux1 ~]# ip a|grep 192.168.100.120    inet 192.168.100.120/24 brd 192.168.100.255 scope global secondary eth0[root@mylinux1 ~]# service haproxy statusHaproxy (pid  3600) is running...

2、其次,检查mylinux2的状态

123 [root@mylinux2 haproxy]# ip a |grep 192.168.100.120[root@mylinux2 haproxy]# service haproxy statusHaproxy is stopped.

3、查看监控界面

Heartbeat+Haproxy实现负载均衡高可用

五、测试故障切换

1、停止mylinux1上的heartbeat服务

12 [root@mylinux1 ~]# /etc/init.d/heartbeat stopStopping High-Availability services: Done.

2、检查mylinux1和mylinux2的状态

1234567 [root@mylinux1 ~]# ip a |grep 192.168.100.120[root@mylinux1 ~]# service haproxy statusHaproxy is stopped.[root@mylinux2 haproxy]# ip a |grep 192.168.100.120    inet 192.168.100.120/24 brd 192.168.100.255 scope global secondary eth0[root@mylinux2 haproxy]# service haproxy statusHaproxy (pid  3997) is running...

3、查看监控页面

Heartbeat+Haproxy实现负载均衡高可用

4、查看mylinux2上的heartbeat日志

[root@mylinux2 ~]# >/var/log/ha-log 

[root@mylinux2 ~]# tail -f /var/log/ha-log 

Oct 01 02:44:31 mylinux2.contoso.com heartbeat: [3534]: info: Received shutdown notice from 'mylinux1.contoso.com'.

Oct 01 02:44:31 mylinux2.contoso.com heartbeat: [3534]: info: Resources being acquired from mylinux1.contoso.com.

Oct 01 02:44:31 mylinux2.contoso.com heartbeat: [3655]: info: acquire local HA resources (standby).

Oct 01 02:44:31 mylinux2.contoso.com heartbeat: [3656]: info: No local resources [/usr/share/heartbeat/ResourceManager listkeys mylinux2.contoso.com] to acquire.

Oct 01 02:44:31 mylinux2.contoso.com heartbeat: [3655]: info: local HA resource acquisition completed (standby).

Oct 01 02:44:31 mylinux2.contoso.com heartbeat: [3534]: info: Standby resource acquisition done [all].

harc(default)[3681]:2016/10/01_02:44:31 info: Running /etc/ha.d//rc.d/status status

mach_down(default)[3698]:2016/10/01_02:44:31 info: Taking over resource group IPaddr::192.168.100.120/24/eth0

ResourceManager(default)[3725]:2016/10/01_02:44:31 info: Acquiring resource group: mylinux1.contoso.com IPaddr::192.168.100.120/24/eth0 haproxy

/usr/lib/ocf/resource.d//heartbeat/IPaddr(IPaddr_192.168.100.120)[3753]:       2016/10/01_02:44:31 INFO:  Resource is stopped

ResourceManager(default)[3725]:2016/10/01_02:44:31 info: Running /etc/ha.d/resource.d/IPaddr 192.168.100.120/24/eth0 start

IPaddr(IPaddr_192.168.100.120)[3878]:2016/10/01_02:44:32 INFO: Adding inet address 192.168.100.120/24 with broadcast address 192.168.100.255 to device eth0

IPaddr(IPaddr_192.168.100.120)[3878]:2016/10/01_02:44:32 INFO: Bringing device eth0 up

IPaddr(IPaddr_192.168.100.120)[3878]:2016/10/01_02:44:32 INFO: /usr/libexec/heartbeat/send_arp -i 200 -r 5 -p /var/run/resource-agents/send_arp-192.168.100.120 eth0 192.168.100.120 auto not_used not_used

/usr/lib/ocf/resource.d//heartbeat/IPaddr(IPaddr_192.168.100.120)[3852]:       2016/10/01_02:44:32 INFO:  Success

ResourceManager(default)[3725]:2016/10/01_02:44:32 info: Running /etc/init.d/haproxy  start

mach_down(default)[3698]:2016/10/01_02:44:32 info: /usr/share/heartbeat/mach_down: nice_failback: foreign resources acquired

mach_down(default)[3698]:2016/10/01_02:44:32 info: mach_down takeover complete for node mylinux1.contoso.com.

Oct 01 02:44:32 mylinux2.contoso.com heartbeat: [3534]: info: mach_down takeover complete.

Oct 01 02:45:02 mylinux2.contoso.com heartbeat: [3534]: WARN: node mylinux1.contoso.com: is dead

Oct 01 02:45:02 mylinux2.contoso.com heartbeat: [3534]: info: Dead node mylinux1.contoso.com gave up resources.

Oct 01 02:45:02 mylinux2.contoso.com heartbeat: [3534]: info: Link mylinux1.contoso.com:eth1 dead.

Oct 01 02:45:02 mylinux2.contoso.com ipfail: [3543]: info: Status update: Node mylinux1.contoso.com now has status dead

Oct 01 02:45:03 mylinux2.contoso.com ipfail: [3543]: info: NS: We are dead. :<

Oct 01 02:45:03 mylinux2.contoso.com ipfail: [3543]: info: Link Status update: Link mylinux1.contoso.com/eth1 now has status dead

Oct 01 02:45:04 mylinux2.contoso.com ipfail: [3543]: info: We are dead. :<

Oct 01 02:45:04 mylinux2.contoso.com ipfail: [3543]: info: Asking other side for ping node count.


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