Assuming your storage is capable of replication, a bunch of VMs could be happily replicated to an alternate location, where you can start them on will (and on crisis, most likely). This procedure, in theory, is rather simple. I have discovered that it is less so, especially if your system goes into testing once a…
Oracle VM, out of the box, does not allow network bonds. An excellent guide on how to enable bonding which I have partially followed, has convinced me that changing the relevant scripts would be better. That I have done, and reported in this wiki post. To sum things up – configure bonding/VLAN tagging as you…
I have had a stressed time, and had no time to actually write down anything here. This is pity, since I have been doing so many things worth sharing. I will start with a small one now – how to convert a physical machine into Xen-based VM. I assume you know the drill of how…
I have had some work done lately with NetApp SnapMirror. I have snapped-mirrored some volumes and qtrees and I wanted to monitor their use and behavior over the line. As you can expect, site-to-site replication of data is a fragile thing, especially when done on the level of the storage device, which is agnostic to…
Warning: This is not the recommended method if you’re not sure you know what you’re doing. Linux Initial Ram Disk (initrd) is a mechanism to perform disk-independent actions before attempting to mount the ‘/’ disk. These actions usually include loading disk drivers, setting up LVM or software RAID, etc. The reason these actions are performed within initrd…
On RHEL-type of systems, with virt-manager (libvirt), you can make use of virt-manager to easy your life. I, for myself, prefer to work with ‘xm‘ tools, but for the initial install, virt-manager is the quickest and most simple available tool. To install a new Linux VM, all you need to follow this flow Create an…
