Create copy of VM on Proxmox

1. Ssh into the Proxmox server as root.
2. Run "vzdump" with desired VMID.

$vzdump 101

3. Run "qmrestore" with unused VMID. Your dump file should be located in /var/lib/vz/dump.

$qmrestore /var/lib/vz/dump/vzdump-qemu-101-2011_01_10-11_13_30.tar 102

I tested this with a Ubuntu server 10.10 VM.  From the Proxmox console I deleted the network device and recreated it to be sure it had a unique MAC address (not sure if that was necessary).  I started the new VM, logged in, and changed the hostname and some values for the apache server.

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**UPDATE (02/09/2011)**
I noticed that when running the this command I would see:

INFO: mode failure - unable to dump into snapshot (use option --dumpdir)

After some intrepid googling I discovered this was because the dump was being created on the same lvm group vzdump had to suspend the vm to do the backup.  To avoid this (since I was backing up a live webserver) I mounted a windows share (on a domain) and pointed the dump to there.

1. Mount the windows share to the /mnt/share directory (be sure that directory exists)

$mount -t smbfs //server/share /mnt/share -o username=domainuser

2. Run vzdump with the --dumpdir option

$vzdump --dumpdir /mnt/share/dumps 101

Linux DNS entry

As I was playing with linux servers I noticed that a DNS entry was not being created when I added new servers to the network. After some googling I found the solution. If you are running dhcp3 update your dhclient.conf (mine was under /etc/dhcp3) to include the following line:

send fqdn.server-update on;

Restart networking.