Trying to migrate

DustinB

@DustinB What you describe is possible without a pool. No need for that.

This I understand, the issue comes in that everything within XO pushes the end administrator to setup a pool with their hosts (even when they don't have shared storage).

The key is automatically migrating those VMs (which I don't know would work without a pool.)

olivierlambert

everything within XO pushes the end administrator to setup a pool

What?

The key is automatically migrating those VMs

What?

A Former User

@borzel
Sorry for late reply much at work now before vacation Yes thats the situation. For me, creating a pool, would seem to be the obvious thing to do when having more than 1 host Since VM can share resources. So...how can I manage this? My plan was to hook them up with a melanox 10 GB NIC and use that for "internal traffic" such as migrating etc. If this isn't possible in current setup I would be happy if you could mention that why creating a pool without single storage, or when trying to migrate them. This HA function should be able even if there are 2 different local storage.

I might have the change to get my hands on a san but... Then I have even 1 more machine

borzel

@fraggan said in Trying to migrate:

his HA function should be able even if there are 2 different local storage

no, there is no (classical XenServer) HA at all with local storage
Live migration is always possible: with pool, with sepparate hosts, with local storage, with shared storage... everytime!
- XCP-ng Center can do it
- XenOrchestra can do it
- YOU can do it (if your mindset is in the right mood )

Since VM can share resources.

VM's do not share resources in a pool unless you have shared storage AND the next point is fullfilled
VM's do share disk space if they are on the same storage AND have the same base image (via snapshots/templates and thin coping them at creation time) - THIS IS NOT A POOL FUNCTION

So, to recap: I you have no shared storage, creating a pool is wasting your time!
(unless you want to group a LARGE amount of servers - only for administration purposes - not for function)

A Former User

@borzel
Well the problem is: I cant migrate so, without having to change the default storage everytime very inconvinient =). Do I need to remove the pool to make it work then? DToes XO understand that there are 2 different local Default storage? There are some futures/function I like to with pools. But if thats the problem I can live without them. I only want to be able to move them however I like.

borzel

@fraggan said in Trying to migrate:

DToes XO understand that there are 2 different local Default storage?

YES! Of course! As I sad, you don't need a pool.

borzel

@fraggan to proove that, here a screenshot of the storages in XO at work:

A Former User

@borzel
I created the pool for other reasons. But why cant I do like you do? I've tried that like 10 times. But everytime I chose one as default the tag moves away from the other one. Both my hosts local storage cant be default at the same time. Thus I'm not able to migrate between them.

A Former User

@borzel
I am not at home now. But do you have any suggestions? If the pool doesnt interfere I will keep that. But I am keen to solve the problem I need to move them around now and then.
Btw how do I earn reputation? Annoying not to be able to post when I want, have to wait 120 sec
Edit: In my world that shouldn't be any problem to have two default storage on two different hosts.

borzel

@fraggan

I created the pool for other reasons

which?

ONE pool can just have ONE default SR

You have ONE pool, so you can just choose ONE SR to be your default SR. To resolve it, migrate all your VMs to ONE host and remove the other host from that pool, so you have now TWO separate HOSTs.

Now you can set the default SR on each host, like I did at work.

A Former User

@borzel
Perfect the answer I was waiting for

borzel

@fraggan that is the same as we all said earlier in this thread at least, we all thought it was obvious ...

Please share to us: what are the reasons you created a pool?

A Former User

@borzel
I want to be able to manage everything and share resources. Every benefith you get by creating pools. Hmm...I want everything in XO for ez mangement. Hmm now I am a bit confused. I want to manage every host I have trough XO. But I want all to have their own default storage. Isn't det possible? Or is it just me that have missunderstod everything how it works?

Edit: Either Iam to drunk, or...I cant find were I remove the pool? If I dc both hosts from the pool. I want to remove it too. When I connect the hosts to the XO they both goes into the same pool again

borzel

@fraggan said in Trying to migrate:

I want to be able to manage everything

You can connect 100000000 hosts/pools to XO and all is in one place.

share resources.

please explain what you mean with that! We asked you that often in the last days. What do you meam with that? Which ressources?

borzel

@fraggan said in Trying to migrate:

Either Iam to drunk, or...I cant find were I remove the pool?

You have to remove the empty host from your pool, not the pool from XO.

A Former User

@borzel
Okej we take it from the beginning. I remove the hosts from the pool. How do I add them to XO so that I am able to manage them from XO without having them in a pool?

A Former User

@borzel I think I found it,.

borzel

@fraggan it should work with the detach button in XO.

I only did such operations in XCP-ng Center, there the user interface is much clearer about that:

After that just add your second host to XO via settings -> servers as your second connection

A Former User

@borzel
Yea the gui in xcp-ng center i much more "make sense" I just abandon the XO for center. GRRR can't post in 120 sec -.-

borzel

@fraggan I use booth and hope that the new XO v6 is more clear about that