Commenti per www.RobertoCespa.com

Commenti su Backup di virtual machines Xen senza interruzione di Robert Wunsch

Robert Wunsch — Sun, 04 Jul 2010 17:25:39 +0000

Hello Roberto, Hello Jan,

I am using Xen 5.6.0 and just starting off virtualising.
i found your script, Roberto, and want to try using it in my desaster recovery.
Jan, could you let me know if you ot that script running on 5.6?
It would be very kind of you to let me know your insights.
Maybe you could send it to Roberto, so he would be able to publish it?

Thanks in advance!
Robert

Commenti su Backup di virtual machines Xen senza interruzione di felice

felice — Tue, 29 Jun 2010 06:48:03 +0000

Io ho un problema, spero si possa risolvere.
Non posso fare snapshot perche il disco locale non ha spazio.
Non posso usare iscsi e simili.
E’ possibile eseguire le snaoshot su un disco usb collegato a xen o a una macchina virtuale su cui c’e’ xencenter?
Utilizzo xen 5.5.0.

Grazie.

Commenti su Backup di virtual machines Xen senza interruzione di admin

admin — Thu, 03 Jun 2010 08:05:28 +0000

Hi Jan, I'm happy you found the script useful. Unfortunaley, I moved to from Xen to KVM mainly for two reasons:

KVM has KSM (Kernel Same Page) feature that permits a very high overlapping: if you have several cloned virtual machines probably the RAM contents mostly the same data and KSM will do data deduplication and you'll be able to run more VMs with same amount of RAM
Citrix Xen Server 5.5.0 had the ugly bug of snapshot coalescing on my storage and I've found my NFS repository filled with snapshot

Now I'm focusing my attention on KVM (mainly using Proxmox VE distro: you can really be up and running in 10 minutes) and I hope to find some spare time to post something about VM migration from Xen to KVM. I'm also starting to use MongoDB, a document database, and I hope to write something about MongoDB + PHP ( + Lithium PHP framework). I'll be glad to publish your script in this post once debugged! Ciao, Roberto

Commenti su Backup di virtual machines Xen senza interruzione di Jan Schulenburg

Jan Schulenburg — Thu, 03 Jun 2010 07:46:21 +0000

Hi Roberto,

I ran your script (slightly adjusted) on XenServer 5.5.0 Update 2 and it ran fine! Many thankz! I updated to XenServer 5.6.0 (grr, lot’s of issues) and now i try to get the backup script running again. It seems i’ve got a few issues:
- @ snapshot, error: ^CFatal error: exception Unix.Unix_error(13, “tcsetattr”, “”)
- i added coalesce-leaf, this isn’t supported anymore.

I could sent you my backup script if needed.

Commenti su Backup di virtual machines Xen senza interruzione di Gianluca C.

Gianluca C. — Thu, 18 Mar 2010 10:32:42 +0000

Ho provato lo script e non mi parte, per farlo funzionare ho dovuto usare perl5.8.8 ( sia sostituendolo sulla prima riga dello script, che per farlo runnare perl5.8.8 backup.pl), usando il comadno perl backup.pl non mi restituiva nessun output..non so perche’ essendo abbastanza ignorante in ambito linux

Commenti su Linux: how to remove a file when the filename begins with a dash di two-bit-fool

two-bit-fool — Thu, 18 Feb 2010 15:40:31 +0000

Here is a more complete explanation: http://two-bit-fool.blogspot.com/2010/02/removing-file-when-filename-starts-with.html

Commenti su Linux: how to remove a file when the filename begins with a dash di two-bit-fool

two-bit-fool — Thu, 18 Feb 2010 15:25:06 +0000

I think you can just put a path on it: rm ./-1.html

Commenti su Backup di virtual machines Xen senza interruzione di Roberto Capua

Roberto Capua — Wed, 23 Sep 2009 23:47:32 +0000

Su questo blog c’è qualche linea guida per fare gli script di backup da windows e la cosa carina è che funziona anche quando cambia il master del pool con winscp…
http://virtualgreen.wordpress.com/2009/09/22/uno-xen-virtual-consolidated-backup-server-artigianale/

Commenti su Backup di virtual machines Xen senza interruzione di Francesco Dipietromaria WebLog

Francesco Dipietromaria WebLog — Wed, 02 Sep 2009 15:31:29 +0000

Backup snapshot based delle macchine virtuali su XenServer 5.5…

Una delle più importanti novità di XenServer 5.5 è la possibilità di effettuare e gestire gli snapshot delle macchine virtuali a prescindere dal tipo di Storage Repository. Questo ha ovviamente un importante impatto sulle procedure di backup.
Un po……

Commenti su Backup di virtual machines Xen senza interruzione di Roberto Cespa

Roberto Cespa — Fri, 21 Aug 2009 08:44:12 +0000

Hi, Steve
Recovering a VM from an .xva file is a simple operation that you can start from XenCenter console; the whole operation is wizard driven and it’s point’n'click.
I have not access to a XenCenter in this very moment (I’m out of office) but, as far as I can remember, is something like “File -> Import VM” from the menu to start the wizard.
Then you have to browse your computer (or a network share) to find the .xva file, select the home server (in case of server pools), select the Storage Repository and click the finish button.
I tested recovery several times and it needed something like 30 to 45 minute each time to bring back the VM to life.
If you don’t want to set up Windows networking again you should manually set the network adater MAC address to the same value of the initial machine.

If you do the recovery by CLI, you should have an option to preserve the MAC (as “Anonymous” says
here: )

Add “preserve=true” when importing to keep the MAC, from the administrator’s guide:

Import a VM from a previously-exported file. If preserve is set to true, the MAC address of the original VM will be preserved.

Ciao,
Roberto