I have configured a 2 node (VMs) cluster with SUSE High Availability Extension.
The cluster doesn't use shared disk. So Stonith is not really required. But the cluster keeps on asking for Stonith.
So what basic stonith can i create ??
I'm configuring a cluster 2 nodes with pacemaker/corosync, and I have some question about it (and maybe best practice : i'm far to be specialist)
**OS:** redhat 7.6
I configurated the cluster with those properties
- **stonith-enabled:** true
- **symmetric-cluster:** true (even if is default value i think)
and added in corosync.conf
- **wait_for_all:** 0 (i want a Node be able to start/work even if his twin is KO)
- **two_nodes:** 1
Considering the fencing:
- Using ILO of blade HP (ILO1 for Node1, ILO2 for Node2)
I read that it was sometimes a good practice to prevent a node suicide, so added constraints
- ILO1-fence can't locate in node1
- ILO2-fence can't locate on node2
The problems I have is the following, happening at starting Node2 when Node1 is shutdown :
- pacemaker/corosync can't start ILO2-fence on Node1 (of course cause Node 1 is down), and so don't start the other resources, and so my cluster is all not working >:[
I am wondering if I miss something in my configuration, or if I don't understand well how such a cluster should work.
Because I'd expect Node2 to start, cluster sees Node1 is KO and just start the resources to make Node2 works on its own.
But is true, since ILO2-fence can only be located on Node1 (because of constraint to avoid suicide), then this resource will always fails ... (when trying without those "anti-suicide" constraints, if Node2 has some services failure, then it shutdowns directly after start, which i don't want)
I would apreciate some returns and enlightments :)
Thank you :)
I have a host with Windows 7. I installed VMware Workstation where I have installed two virtual machines. Each virtual machine is a rhel 6.2 node running clustersuite.
Do you know which fence device I can use in order to configure the cluster?
I found out that proxmox doc says a lot abou Fencing. I haven't found anything about it in Ganeti doc. Also I screeched Ganeti Google Group Archive and I found similar question but answer was that Split Brain is not a problem in Ganeti and questioner should read archive.
So I wonder if Ganeti solved in some creative way or just ignored the problem? I'm especially interested in setups with only two nodes.
I'm trying to demo (and learn) a Red Hat Cluster on ESXi 3.5 update2.I've set a shared fencing device with the info for my ESXi server. I try fencing a node from Luci, but it only tells me that fencing failed. Messages log has following agent "fence_vmware" reports: Unable to connec/login to fencing device. I checked and rechecked password and the connection properties.
Any ideas why this is happening. Is it possible to use ESXi as fencing?