I have described in this post how to setup RHCS (Redhat Cluster Suite) for ZFS services, however – this is rather outdated, and would work with RHEL/Centos version 6, but not version 7. RHEL/Centos 7 use Pacemaker as a cluster infrastructure, and it behaves, and configures, entirely differently. This is something I’ve done several times,…
I wanted to write down a guide for RHCS on RHEL/Centos6 and XenServer. If you want to do that, you need to go through two major challenges which you will encounter. I want to save on the search and sum it all up together here. The first difficulty is the shared disk. In order to…
When using Ricci as the engine for ‘cman_tool version -r’ command, you will experience timeouts (and practically – you will be unable to use ricci to update the cluster configuration across the nodes) when the ricci user password contains XML-sensitive characters, like <>&, etc. As they say – FYI 🙂
This is a very nice project I have been working on. The hardware at hand – two servers, with a shared SAS bus containing several SAS disks. Since it’s a shared bus, no RAID solution would cut it, and as I don’t want to waste disks with ASM (“normal” redundancy meaning half the size…), I…
The concept of running a virtual machine, KVM-based, in this case, under RHCS is acceptable and reasonable. The interesting part is that the <vm/> directive replaces the <service/> directive and acts as a high-level directive for VMs. This allows for things which cannot be performed with regular ‘service’, such as live migration. There are probably…
Working with RH Cluster quite a lot, I have decided to create an online store of customer agents/scripts. I have not, so far, invested the effort of making these agents accept settings from the cluster.conf file, but this might happen. Let the library be! Oracle DB script/agent: Although I discovered (a bit late) that RH…
