On 18/06/14 12:32 PM, Alessandro Baggi wrote: > Ok, fencing is a requirement for a cluster for hardware failure. > I've another question about this arg, but for software failure. > Supposing to have a cluster of httpd installation on 6 virtualized > hosts, each one on a different server. Suppose also that a guest (named > host6) has a problem and can't start apache. With this scenario, the > ipmi, ups are unnecessary. How to work fencing in this way? How to make > fencing node? > > Thanks in advance. > > Alessandro. I'm not sure I understand properly... You mean that you have 6 VMs which are nodes in a cluster, or 6 nodes, each hosting a VM you want to make HA? If the VMs are themselves nodes, then you could use fence_virt as the primary fence method, which would power off/on the VM itself by talking to the hypervisor on the host. If that fails (say because the host itself fails), the use IPMI or PDU based fencing as a backup, in which case the host itself would be powered off/on (thus ensuring the VM on the host is down as well). If the hardware servers themselves are the nodes, then the VMs are not a factor in the equation. Services, including VMs, will recover on another host after the fence has succeeded. -- Digimer Papers and Projects: https://alteeve.ca/w/ What if the cure for cancer is trapped in the mind of a person without access to education?