Proxmox KVM Restores using Templates

[ejc317]

So I used a QCOW template to restore a KVM

1) Create VM
2) Replace the qcow file on the NFS storage
3) Done!

Now, if I store it on iSCSI, how would I restore a KVM image?

Otherwise is there another way to restore? I got the templates off of stacklet

 

[dietmar]

You can use vzdump backup/restore.

 

[ejc317]

You can use vzdump backup/restore.

THanks dietmar can you go into more details? If its just a raw image I can backup? b/c for the other one i didnt "backup" per se just copied an image

 

[dietmar]

THanks dietmar can you go into more details? If its just a raw image I can backup? b/c for the other one i didnt "backup" per se just copied an image

Oh sorry - vzdump/restore only works if you want to 'clone' an existing VM.

 

[ejc317]

Oh sorry - vzdump/restore only works if you want to 'clone' an existing VM.

Yeah I want to put a KVM template into an iSCSI volume i guess kpartx may work?

 

[dietmar]

Yeah I want to put a KVM template into an iSCSI volume i guess kpartx may work?

Create a VM with a iSCSI volume, the use 'qemu-img convert' to copy the data.

 

[ejc317]

Create a VM with a iSCSI volume, the use 'qemu-img convert' to copy the data.

Do we have to mount the volumes first??

 

[ejc317]

Do we have to mount the volumes first??

I got the error "config file already exists"

 

[ejc317]

I'm confused

If i click on a vm under backup only .lzo or whatever files show up

.tar files do show up on the local storage but I can only restore them to a different VM #?

 

[ejc317]

Alternatively, if we just install versions of ALL the O/S that we need - we can just clone it by backing it up and restoring to a new VM number right?

Guess not sure what is easier

 

[dietmar]

Alternatively, if we just install versions of ALL the O/S that we need - we can just clone it by backing it up and restoring to a new VM number right?

Yes, that sounds reasonable.

 

[ejc317]

I tried to replace one of the .tar's with a copy of the qemu.conf and a .raw file and when I tried to restore it it says config already exists ... (is this because when u restore, if the content is different, i can't restore to the same VM? I need to do a new one?)

I'm trying to do

1) Create VM with ID 100
2) back it up to an NFS store
3) replace backupon NFS store with .tar of raw img + the .conf
4) Restore to VM 100

should I just restore to VM101? if so that creates alot of random shell vms

 

[ejc317]

But the restore only writes to an NFS store ... can't restore to iSCSI ... any ideas?

 

[dietmar]

But the restore only writes to an NFS store ... can't restore to iSCSI ... any ideas?

Try to use use raw instead of qcow2

 

[tom]

works here. provide details about your problems with iSCSI.

 

[ejc317]

I mean restore using my method of renaming the file - it says config exists ... i am trying to restore a kvm template to a VM (we got it from stacklet and its in either raw or qcow format)

 

[dietmar]

You tried with 'qemu-img convert'?

 

[ejc317]

You tried with 'qemu-img convert'?

yes - but it didn't go anywhere

you mean use qemu-img convert of our .raw file to qcow?

 

[ejc317]

yes - but it didn't go anywhere

you mean use qemu-img convert of our .raw file to qcow?

Not to be dense but can you give me more instructions on how to convert a .qcowor raw image back into a VM - goal is to create a blank vm with no mounted media and put one of these images in