I have a nice 4 way box with 5GB of RAM running CentOS 4.2/OpenVZ. I like it a lot, but I've come across a stumbling block: Backups.
I want to make snapshots and dump them over the network to a disk cache before being dumped to tape.
I generally do this with lvm snapshots, the dump command, and ssh, but when I try to create the lvm snapshot, I get an error.
# lvcreate -s -l 20 snap_root /dev/vg_sys/root
snapshot: Required device-mapper target(s) not detected in your kernel
lvcreate: Create a logical volume
...
# modprobe dm_snapshot
FATAL: Module dm_snapshot not found.
Are lvm snapshots unavailable on the openvz kernels?
--Andy