Most documentation on the net is about how to run a cluster-in-a-box under Vmware. Very few seem to care about protecting Vmware guests under real RedHat cluster with a shared storage. This article is just about it. While I would not recommend using Vmware in such a setup, it has been the case, and that…
Unlike VMware Server, Xen’s HyperVisor does not allow an easy collection of performance information. The management machine, called “Domain-0” is actually a privileged virtual machine, and thus – get its own small share of CPUs and RAM. Collecting performance information on it will lead to, well, collecting performance information for a single VM, and not…
Doesn’t work. It will work fine up to the step where you actually try to active one of the VMware virtual machines. And then your kernel will panic. Works fine without Xen kernel (but without Xen, of course). Pity. Was tested on Centos5.1 64bit.
When one wants to achieve fast provisioning of virtual machines, some solutions might come into account. The one I prefer uses Linux LVM snapshot capabilities to duplicate one working machine into few.
This can happen, of course, only if the host running VMware-Server is Linux.
LVM snapshots have one vast disadvantage
I have been struggling with RH Cluster 4 with VMware fencing device. This was also a good experiance with qdiskd, the Disk Quorum directive and utilization. I have several conclusions out of this experience. First, the configuration, as is: <?xml version=”1.0″?> <cluster alias=”alpha_cluster” config_version=”17″ name=”alpha_cluster”> <quorumd interval=”1″ label=”Qdisk1″ min_score=”3″ tko=”10″ votes=”3″> <heuristic interval=”2″ program=”ping vm-server…
VMware allow setting a virtual machine as a private machine. By doing so, it actually adds to “/etc/vmware/vm-list-private” an additional comment, stating who is the owner of the machine. For example: cat /etc/vmware/vm-list-private # This file is automatically generated. # Hand-editing this file is not recommended. config “/vmware/Centos4-01/Centos4-01.vmx|root” config “/vmware/Centos4-02/Centos4-02.vmx|user” While it is very effective…
