[one-users] OpenNebula with additional storage

Tue Oct 15 07:55:27 PDT 2013

Hi Amier

I don't think you have to use 0 and 1 datastores.
You can create image and system datastores and mount it to GlusterFS.
For example, create a new image datastore, let's say ONE assigns ID 120:
 - create/export volume DS120 from openfiler
 - mount it on one controller and all hosts under /var/lib/one/datastores/120

Create cluster and system datastore (ie. 121) and do the same, you can point it to faster storage – this is where running VMs store disks.

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From: Amier Anis <mymabma at gmail.com<mailto:mymabma at gmail.com>>
Date: Monday, October 14, 2013 4:13
To: "Ruben S. Montero" <rsmontero at opennebula.org<mailto:rsmontero at opennebula.org>>
Cc: "users at lists.opennebula.org<mailto:users at lists.opennebula.org>" <users at lists.opennebula.org<mailto:users at lists.opennebula.org>>
Subject: Re: [one-users] OpenNebula with additional storage

hi,

any idea on this?

part of that, is /var/lib/one/datastores not necessary export from frontend?

On Thu, Sep 19, 2013 at 11:23 AM, Amier Anis <mymabma at gmail.com<mailto:mymabma at gmail.com>> wrote:
Hi Ruben,

Thanks give some explanation. Just to ensure I have same picture and understand your words.

  1.  I'm planned to use GlusterFS or iSCSI (openfiler) for both my datastore 1 and 2.
  2.  Do you mean default and system (0 and 1) can be expand to external storage?
  3.  Is that mean when I use ID 100 for datastore1 (192.168.1.11) then datastore2 (192.168.8.12) must be use ID 101 or must use same ID 100?

Is the structure look like this?
/var/lib/one/datastore/0    <-- default created by OpenNebula | default internal storage or can expand to external storage
/var/lib/one/datastore/1    <-- default created by OpenNebula | default inernal storage or can expand to external storage
/var/lib/one/datastore/101   <---- mount point from datastore 1
/var/lib/one/datastore/102   <---- mount point from datastore 2

Thanks you.

.: Amier Anis :.

On Thu, Sep 19, 2013 at 3:19 AM, Ruben S. Montero <rsmontero at opennebula.org<mailto:rsmontero at opennebula.org>> wrote:
Hi

So I assume that you have 2 different NFS shares (or equivalent):

About Mount Points

They **must** use the same ID as the one assigned by OpenNebula. So if you want datastore with ID 100 be backed by datastore1 (192.168.8.11), then you must mount the volume on

/var/lib/one/datastore/100. Same apply to 0,1 default and system datastores created by OpenNebula by default.

About Datastore Types and Usage

There are two types of Datastores: Images where you usually store base images (e.g. default ID:1) and system where the VMs run from (e.g. system ID:0). And there are three types of images: persistent no copy from image to system datastores (link); no-persistent images are copied (cloned) to the system datastore; and volatile disks, always created in the datastore.

Summary, register an image (oneimage create) will take space from your image DS, deploying a vm (onevm deploy) will take space from your system DS. How much space? It depends on the image (persistent vs non-persistent) and the format raw vs qcow2.

You  also need to consider that checkpoints (suspend/stop a VM) will generate a checkpoint file to be stored also in the system DS

Hope you can now plan better your storage.

Cheers

Ruben

On Wed, Sep 18, 2013 at 4:18 PM, Amier Anis <mymabma at gmail.com<mailto:mymabma at gmail.com>> wrote:
Guys,

any suggestion or advise. really need your help.

On Tue, Sep 17, 2013 at 7:41 PM, Amier Anis <mymabma at gmail.com<mailto:mymabma at gmail.com>> wrote:
Hi,

I would like to know how I should implement the datastore if I have 2 different size of storage but with same datastore types (shared FS). As I know I need to I need to mount the target datastore to very hosts.

However, I little bit confuse on the datastore structure and where to mount the the first datastore1 (192.168.8.11) and 2nd datastore2 (192.168.8.12). Is that correct if i mount the datastore like this at every node?

Method 1

  1.  datastore1 to /var/lib/one/datastore/0
  2.  datastore2 to /var/lib/one/datastore/1

or i need to like this

Method 2

  1.  datastore1 to /var/lib/one/datastore/1
  2.  datastore2 to /var/lib/one/datastore/2

Is the /var/lib/one/datastore/0 is for frontend use? how much space we need if we have 1TB of datastore or VM?
Is there any specfic number that I must use and cannot use to mount the datastore?
How do i set the additional datastore?

Hope you can advise further.

OpenNebula : 4.x
OpenNebula Sunstone : 192.168.8.10
Storage 1 / Datastore 1 : 192.168.8.11
Storage 2 / Datastore 2 : 192.168.8.12

Your kind assistant is highly sought.

Thanks you.

Regards & Best Wishes,

.: Amier Anis :.

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