Re: Xen/dom0/FreeBSD + NAS4Free WebGUI.

Hello,

--------------------------------------------------
From: "Roger Pau Monne" <royger_at_FreeBSD.org>
Sent: Monday, December 28, 2015 10:20 PM
To: "Daisuke Aoyama" <aoyama_at_peach.ne.jp>; <freebsd-xen_at_freebsd.org>
Cc: <freebsd-current_at_freebsd.org>
Subject: Re: Xen/dom0/FreeBSD + NAS4Free WebGUI.

> Hello,
>
> El 26/12/15 a les 15.26, Daisuke Aoyama ha escrit:
>> Hi all,
>>
>> I'm creating NAS4Free dom0 edition.
>> This is simple wrapper of Xen/dom0/FreeBSD.
>>
>> You can upgrade by same way of NAS4Free.
>> You can manage HDD, ZFS, iSCSI target, NFS share by same way of NAS4Free.
>> You can manage DomU(VM) via WebGUI.
>>
>> Japanese blog:
>> http://shell.peach.ne.jp/aoyama/archives/3149
>> http://shell.peach.ne.jp/aoyama/archives/3135
>>
>> NAS4Free dom0 topic in English:
>> http://forums.nas4free.org/viewtopic.php?f=17&t=10028
>>
>> Latest download:
>> http://www.peach.ne.jp/archives/nas4free/test/2244-dom0/
>>
>> How to install:
>> 1.Download LiveCD iso image.
>> 2.Burn to CD/DVD-RW blank disc.
>> 3.Boot from it.
>> (if your server don't have an optical drive, please use an external USB
>> optical drive)
>> 4.Install to USB Flash drive (2GB or more) from menu #9.
>> 5.Reboot the server after ejecting CD/DVD media.
>>
>> How to upgrade:
>> 1.Navigate to System|Firmware in global menu from web browser.
>> 2.Click "Enable Firmware Update".
>> 3.Select NAS4Free-dom0-embedded-*.img.xz. (don't decompress the image)
>> 4.Click "Upgrade Firmware".

I forget to write. You should backup the config from System|Backup/Restore before upgrading.

>>
>> Note:
>> At least you need a bridge interface before using.
>> Please create it from Network|Interface Management|Bridge.
>> You can change boot parameters from System|Advanced|loader.conf.
>> If you are interested in the xl.cfg, it is created in
>> /usr/local/etc/xen/vm-<VMNAME>.cfg.
>
> Thanks for doing this, I just gave it a try and it worked out of the
> box, I was able to create and launch a Windows VM in less than 2min,
> quite impressive :).

Thank you for trying.

>
>> Known issues:
>> uuid generation of ports/sysutils/xen-tools is broken. You cannot
>> control by UUID.
>> (quick hack patch is attached this mail)
>
> I've given a look at the patch, but I have to admit I know very little
> about UUID, yet it seems like you should not poke directly at the
> internal uuid_t fields. I've created another patch which I *think*
> should solve the UUID issues, could you test it please? It should apply
> cleanly against Xen 4.5.
>
> https://people.freebsd.org/~royger/uuid.patch

Your patch does not work as expected.
You can test it under normal FreeBSD. First create UUID by uuidgen(1):

# uuidgen
4c90eb5a-adee-11e5-a747-001b2157b424

Insert the UUID to your VM config (see also /usr/local/etc/xen/vm-<VMNAME>.cfg):
uuid = "4c90eb5a-adee-11e5-a747-001b2157b424"

Run the VM:
# xl create name.cfg

Check by xl list:
# xl list -v
# xl list -l

Your patched result is here:
[root_at_nas4free-xen ~]# xl list -v
Name                                        ID   Mem VCPUs      State   Time(s)   UUID 
Reason-Code   Security Label
Domain-0                                     0  4096     4     r-----     202.8 
00000000-0000-0000-0000-000000000000        -                -
nas4free                                     4  2048     2     -b----      51.1 
00000000-0000-0000-0000-000000000000        -                -

>> xnb device performance is terrible.
>> (it eats 100% CPU on intr while transferring via bridged 10GbE)
>
> I haven't seen this, but I'm not surprised (I also don't have a 10GbE
> card at hand right now). There's a lot of fine tuning and bug fixing to
> do regarding the backends. I plan to get with this once the PVH
> implementation is stable.

I feel UUID is very small thing than performance 70% drop down via xnb.

Regards,
-- 
Daisuke Aoyama