Mar 13 2012

LVM on top of DRBD “Failure: (104) Can not open backing device”.

Using Proxmox VE, in 2 members cluster configuration with LVM on top of DRBD, makes possible to have FileSystem Data Redundancy and support OnLine VMs Migration between Host Controllers.

DRBD refers to block devices designed as a building block to form high availability (HA) clusters.
This is done by mirroring a whole block device via an assigned network. DRBD can be understood as “Network-Based RAID1”.
For detailed information please visit Linbit.

After rebooting a controller it is possible to see that DRBD is not properly working and the rebooted node is indicating: “Failure: (104) Can not open backing device.” and DRBD’s DS is “Diskless”.
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May 7 2011

Semi-Quick KVM Virtualization using libvirt

A “Semi-Quick” procedure to have a working KVM environment and a fresh VM Guest working on it.

I call it “Semi” because the entire procedure takes a bit of time, but still less than a life!

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