@Andrew So I need to run xcp-ng 8.3 in order to get vTPM.
For those still running xcp ng v8.2.1 in production, would you recommend upgrading production to 8.3beta1? From the xcp-ng post, it seems to be very solid with some outstanding issues?
Also, xenserver is also available. Any thoughts on interoperability of Xenserver and xcp-ng and XO from sources?
I'm sure that by now, we should have Windows 11 vTPM support (& guest tools) on xcp-ng and Xen Ochestra, right? The last thread I found about this topic was from 2021.
I have experienced a catastrophic disaster while I tried to upgrade my rack servers. At first it worked very well by using the migration of VMs to the new server then assigning the new server as the master. Then, I decided that it was time to change the DHCP assigned address to take the place of the static ip , replacing the old server. Then all hell broke loose.
the xsconsole no longer saw the pms, yet the vms were still running!
decided to reboot the server to see if it's xsconsole not reading something and a reboot would solved it.
That's when I realized that all my metadata were gone! the vms were gone. the storage repositories were gone.
Yet, I know that the iSCSI repository, which stores all the vms, was still intact by looking at the mount of free vs. total space as presented in TrueNAS Core.
After many tries, I was able to reattach the iSCSI repository to the new server running, of course, xcp-ng. But there were no VMs presented in presented in a new instance of Xen Orchestra (CE). I thought that if there's a way to restore the meta-data for XO config and XO backup, I would be able to restore everything. The data has been downloaded off TrueNAS and into my MacBook Pro. It seems that these strategies aren't working.
I googled around to find out best practice or solutions to no avail.
I hope that you can help me please! These VMs are business critical. If someone can help me, the business won't be burning come Monday morning.
@chon It's Jun 3, 2023. After three years, I'm going to finally do the migration to a new Dell server hardware. I'll update this thread for those who are interested. thanks.
Hi there,
I am checking to see how loaded my servers are. When go to Dashboard >> Statistics and point to show me the "load", I'm shown mostly yellow with rare patches of green blocks.
When I look at the hosts themselves at Home >> Hosts >> Stats, the graphical CPU visualization, shows the CPUs are all running under 12% usage.
@olivierlambert Thanks. I understand Dom0 and VM0 principles. I didn't know that exited in
xsconsole, resulting terminal being a VM.
@Andrew If I am understanding your reply on dom0 correctly, does this mean that when I into the xcp-ng terminal and type htop and lscpu and they are both reporting 8 cores instead of 24, that's correct?
I have two identical servers. The other server, reports the right number of cores though.
How do I reconcile the difference between the two servers?
The only difference between them is the amount of ECC RAM (24GB vs 64GB) but I doubt that it would make a difference on this topi c.
Hi,
There is a weird issue happening because the number of cores reported between XO, Xcp-ng and lscpu + htop are different.
XO and xcp-ng report that there are 24 logical cores. Great. Also the BIOS sees 2 physical CPUs x 6 physical cores = 24 logical cores.
However, when I run lscpu and htop from the command line, they report that there are only 8 logical cores or 4 physical cores.
Has anyone bumped into this issue before?
are there 24 or 8 cores?
Does anyone have experience with nVidia Tesla P4 with XCP-ng with XO and Plex Media Server running in a VM with transcoding enabled.
@danp Yes, all my VMs are up-to-date.
Yes, I am running XO, the free and open sourced version.
In addition, this happens to all my 11 VMs.
Hi,
I was trying to restore one of four available differential backups. When I picked on and the location to restore, I was encountered with the following cryptic error. I hope someone can help me understand and solve this error.
The error was in the logs under the Message column.
Much appreciated.
Values have same structure but are not reference-equal:
Buffer(16) [Uint8Array] [
11,
238,
222,
110,
103,
86,
77,
110,
169,
135,
15,
157,
26,
10,
151,
26
I should advise that doing a restore straight from the VM was successful. However, when done from the Backup -- Restore --> choose a VM and a differential backup, that fails.
I was able to make NUT work with XCP-NG. I used and followed the instructions in this post.
On issuing the command:
[21:56 xenserver1 ups]# ./xen-shutdown.sh
All VMs shutdown EXCEPT for the Xen Orchestra. I tried remove and reinstall Xen Tools
apt install xe-guest-utilities
I'm on Ubuntu 18.04
Is there something that should be done with Xen Orchestra? Like I said, all other VMs shutdown quickly and properly. I only have Ubuntu 18.04 and one instance of FreePBX. FreePBX shutdown properly too.
Update: it seems that after 5-10 minutes (not sure yet as I haven't timed it), the entire XCP-NG does shutdown but not sure if it was a forced of graceful shutdown on the VM running XO.
@olivierlambert I watched this video by Tom @ Lawrence Systems. Now I understand everything.
I hope this video helps everyone else confused about backup.
Hi,
I have connected my XCP NG host to a UPS. The UPS can run for 6 hours. Usually this is sufficient for me to manually shutdown my VM and gracefully shutdown. Do you know if it's possible to setup the host so it shutdown when it polls the UPS that the power is about to run out?
@olivierlambert I'm sorry for generating a confusion. Per your reply, if these are snapshots, then, why not just use snapshots instead of differential backups? Confused.
At least in snapshots, I can have and keep as many snapshots as I want. In differential backups, it only keeps one and deletes the old one -- even though, per my settings, it seems and it is supposed to keep at least 3 differential backups.
@olivierlambert I think I'm getting it. So, if I have setup NFS as my storage repository, how will I be able to find the first snapshot over there? and how do I use that first snapshot in order to do a restore? Currently, I can only see the nightly differential backups from the UI in XO
Thanks for clarifying the meaning of retention.
In regards to concurrency, by jobs do you mean the number of VM backups running when the backup is running night/daily/weekly if I have several VMs set in the backup job?
Hi, I have a simple question about Delta backup initial seed.
in the documentation it says:
"3. edit the job to target the other remote
4. copy files from the first remote to the other one"
I created a differential backup, I set the concurrency to 3 and full backup interval to 20.
I ran a full backup as per
"1. create a delta backup job to the first remote
2. run the backup (full)"
My questions are,
where can I find the full backup of each of the VMs it created since these VMs aren't listed at each of the VMs "Snapshot" tabs and what does "target the other remote" mean? Does it mean my TrueNAS server or does it mean XCP-NG server that's the host of XO? It is a bit confusing.
I thought that concurrency means the number of previous backups XO keeps around and that full backup intervals are the number of differential backs it would have done before doing a full backup again.
Thanks for your clarification in advance.
@Danp they are stored in a FreeNAS physical server connected to another physical hardware with xcp-ng. The link via iScsi.
Thanks @Tony.
xsconsole is no go. It backups the VM metadata only though.
May you show me where I can find said metadata backup function in XOA please? I'm running the community edition