Heartbeat CRM模式
heartbeat默认模式是没法监控资源的，也就是说其中某个资源要是crash掉了，也不会发生任何动作，它只有当它认为对方机器dead后才会发生动作。也就是机器crashed，网络断掉了之类。这显然没法达到我们的目标。
为了达到我们的目标就要采用crm(cluster resource management)模式了。
首先，先按默认模式配置heartbeat。
默认模式配置成功后，再按下面的步骤操作：
标签类目:heartbeat
Setting Up A High-Availability Load Balancer (With Failover and Session Support) With HAProxy/Heartbeat On Debian Etch
This article explains how to set up a two-node load balancer in an active/passive configuration with HAProxy and heartbeat on Debian Etch. The load balancer sits between the user and two (or more) backend Apache web servers that hold the same content. Not only does the load balancer distribute the requests to the two backend Apache servers, it also checks the health of the backend servers. If one of them is down, all requests will automatically be redirected to the remaining backend server. In addition to that, the two load balancer nodes monitor each other using heartbeat, and if the master fails, the slave becomes the master, which means the users will not notice any disruption of the service. HAProxy is session-aware, which means you can use it with any web application that makes use of sessions (such as forums, shopping carts, etc.). 继续阅读 »