BRRABill's Field Report With XenServer

Danp

@scottalanmiller said:

@BRRABill said:

But only if they share storage, correct?

If it is using Xen's migrate system, yes.

XO will migrate a VM between local storage on two XS.

olivier

Figure 1: me actually lurking in this thread

BRRABill

@olivier

So, what is the official answer from up there?

Can XO migrate a VM fro one standalone XS to another XS?
Can you migrate the VM that XO is running on? (That gave me a "no can do" error.)

BRRABill

The VM that I exported seems to have created a vApp.

What is that?

olivier

@BRRABill

Yup
Yup

But you need to define a default SR on any pool you got. Eg: xe pool-param-set uuid=<pool-uuid> default-SR=<sr-uuid> (with the SR UUID of the local storage if you don't have a shared storage).

You can also do it with XenCenter or XO (see https://xen-orchestra.com/blog/set-the-xenserver-default-sr/ )

A live migration won't interrupt the VM, so even with XO on it: doesn't matter.

BRRABill

@olivier said:

But you need to define a default SR on any pool you got. Eg: xe pool-param-set uuid=<pool-uuid> default-SR=<sr-uuid> (with the SR UUID of the local storage if you don't have a shared storage).

You can also do it with XenCenter or XO (see https://xen-orchestra.com/blog/set-the-xenserver-default-sr/ )

But to clarify ... you DON'T need a pool? or do you?

Danp

@BRRABill said:

But to clarify ... you DON'T need a pool? or do you?

@Danp said:

I can answer that for you. Yes, you can migrate between hosts in separate pools (technically, a lone XS is in it's own pool).

olivier

Yes, as @Danp said, there is always a pool: a "single" host is by default in a pool with no name label.

XenCenter choose to hide this, not us.

BRRABill

@Danp @olivier

Thanks @Danp ... I think the thing that was throwing us here (who thought it was not possible outside a pool) was that a standalone is actually a pool

BRRABill

Converted my first physical server to a production XS this morning.

So far, so good.

BRRABill

Question:

On the new production server, it is not reporting the space taken by my new VM.

This is what is says:

Total: 871.8 GiB
Currently used: 5.2 GiB
Available: 866.5 GiB

But for example the new VM I migrated over has at least 100GB.

Why would it not be reporting this?

BRRABill

Danp

Thin provisioning?

BRRABill

@Danp said:

Thin provisioning?

But there is 100GB of data actually on the drive.

Dashrender

you have to refresh. Refresh doesn't happen automatically.

BRRABill

@Dashrender said:

you have to refresh. Refresh doesn't happen automatically.

Ah.

What is this? 1973?

Dashrender

@BRRABill said:

@Dashrender said:

you have to refresh. Refresh doesn't happen automatically.

Ah.

What is this? 1973?

I kinda asked/thought the same thing. Having to manually fresh, or relaunch the application just seems odd.

BRRABill

@Dashrender said:

I kinda asked/thought the same thing. Having to manually fresh, or relaunch the application just seems ~~odd~~ OLD.

FTFY

Dashrender

Did refreshing it solve the problem?

BRRABill

Yep.

Rescan is actually the word they use.

What does that do exactly, I wonder?