Heartbeat+Haproxy实现负载均衡高可用

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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。

二、修改heartbeat的资源文件

这里还是贴出两个heartbeat节点的ha.cf配置，如下：

三、启动heartbeat服务

1、首先在mylinux1和mylinux2上先关闭haproxy服务

2、依次启动mylinux1和mylinux2上的heartbeat服务

四、测试haproxy的高可用

1、首先，检查mylinux1的状态

2、其次，检查mylinux2的状态

3、查看监控界面





五、测试故障切换

1、停止mylinux1上的heartbeat服务

2、检查mylinux1和mylinux2的状态

3、查看监控页面





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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