Proxmox 1.7 ISCSI Problems?

[Mrdude]

Hi so i have been searching around for an answer and i dunno if i am just not asking the right question, or what not.. but i figured ill just start a thread and get everyone input..

So what i have done is setup a proxmox ve 1.7 on a server with a 64gb SSD drive. I bought a Drobo B800I and set it up on proxmox as an ISCSI target ad then set up a LVM group on that.

http://www.drobostore.com/store/drobo/en_US/pd/CategoryID.54837100/productID.224905000

The thing though is that it doesnt seem to do any formatting. and I go to create a VM (KVM) and it can only create a "raw" image format, should that be correct? I would prefer to use vmdk so that they are all enclosed and separate. is there something that i did wrong? any help would be greatly appreciated

Thanks,
Mrdude

 

[udo]

Hi so i have been searching around for an answer and i dunno if i am just not asking the right question, or what not.. but i figured ill just start a thread and get everyone input..

So what i have done is setup a proxmox ve 1.7 on a server with a 64gb SSD drive. I bought a Drobo B800I and set it up on proxmox as an ISCSI target ad then set up a LVM group on that.

http://www.drobostore.com/store/drobo/en_US/pd/CategoryID.54837100/productID.224905000

The thing though is that it doesnt seem to do any formatting. and I go to create a VM (KVM) and it can only create a "raw" image format, should that be correct? I would prefer to use vmdk so that they are all enclosed and separate. is there something that i did wrong? any help would be greatly appreciated

Thanks,
Mrdude

Hi,
on a lvm-storage you can only create raw-disks. In real life this raw disk is an logical volume on the lvm-storage. You can simply copy your vmdk-file (if it's already in raw-format - look with "file disk.vmdk") to the created disk like this

dd if=disk.vmdk of=/dev/drobo/vm-110-disk-1 bs=1024k

Udo

 

[Mrdude]

Thanks udo,

My next question then would be: can i use an ISCSI Target as a directory to hold vmdk images, iso images, or vzdump backups on seperate luns? or can an ISCSI target only be used as a LVM Group?

Thanks,
Mrdude

 

[udo]

Thanks udo,

My next question then would be: can i use an ISCSI Target as a directory to hold vmdk images, iso images, or vzdump backups on seperate luns? or can an ISCSI target only be used as a LVM Group?

Thanks,
Mrdude

Hi,
if you create an filesystem on the iscsi-target you can also use this filesystem for backup/isos... (create an mount-entry in /etc/fstab).
Due to performance it's better to use lvm-storage for raw-disks and not a filesystem between.

Udo

 

[Mrdude]

Thanks again Udo,

One last question due to my "limited" knowledge of commands and such.. (Im getting better but not there yet.)
what would be the way i do that? my proxmox server and ISCSI are on the same local network.
Server: 192.168.48.192
ISCSI: 192.168.48.99
what would i put in /etc/fstab?

Thanks much,
Mrdude

 

[udo]

Thanks again Udo,

One last question due to my "limited" knowledge of commands and such.. (Im getting better but not there yet.)
what would be the way i do that? my proxmox server and ISCSI are on the same local network.
Server: 192.168.48.192
ISCSI: 192.168.48.99
what would i put in /etc/fstab?

Thanks much,
Mrdude

Hi,
that depends...
If you export a single iscsi-target for mounting, you can create a lvm on this (volumegroup and a logical-volume like "iscsistor", after that mkfs.ext4 on the lv). Then you can use "/dev/mapper/drobo-iscsistor" in fstab.
or you use the iscsi-target as normal disk, create a partition, make filesystem and use "blkid" to get the UUID of this filesystem - this can you also put in the fstab.

Both methods has the effort, that all will be fine when the devicenumbering change - like from sdc to sde because of another internal disk.

Udo