@Darkbeldin Does it require ChangeBlockTracking?
The wording after clicking Interrupted backup, is "Restart failed backup", not "Continue interrupted Backup". It takes another snapshot also instead of continuing the sending of the existing snapshot.
Is there a particular version of XOA required?

@Darkbeldin I did not see anything about continuing interrupted backups in the docs. is there any update on this?

@joehays

These are examples of PCIe add-on cards that could work for software raid of the boot drive. Booting from M.2 SATA is much more likely to work with old hardware than NVMe. XCP-ng installer may automatically make a software RAID out of them. Most of the other dual M.2 cards are funky in that one is M.2 NVMe and the other M.2 SATA.

• $62.00 dual M.2 SATA only with no need for SATA cables. StarTech.com 2x M.2 SATA SSD Controller Card - PCIe - PCI Express M.2 SATA III Controller - NGFF Card Adapter (PEX2M2), Red
• $43.00 four port NVMe only PCIe card. GLOTRENDS PA41 Quad M.2 NVMe to PCIe 4.0 X16 Adapter Without PCIe Bifurcation Function, Support 22110/2280/2260/2242/2230 Size (PCIe Bifurcation Motherboard is Required)

@rjt Note to self about creating and managing appliances at xe cli.
xe help --all | egrep -i '(appliance)' # find xe appliance related commands.

• appliance-assert-can-be-recovered,
• appliance-create,
• appliance-destroy,
• appliance-list,
• appliance-param-clear,
• appliance-param-get,
• appliance-param-list,
• appliance-param-set,
• appliance-recover,
• appliance-shutdown,
• appliance-start,

@dave-opc
"vm start delay - does it work yet?" says that that "start_delay" is the xe appliance list delay time before starting the next vm in the appliance list. In XenCenter and XCPcenter, these are known as "vApps". In X*Center, Right click on the name of a pool, and choose "Manage vApps". The term "Appliance" is not the best word because the use case case is starting a fleet of VMs, but appliance means singular. Optionally, the order and wait time of starting the VMs in an "Appliance" can be set and that is where "start_delay" comes in.

"XAPI-project Class: VM_appliance start does not document the optional delay between starting each VM in the appliance.

https://xcp-ng.org/forum/post/11881
https://xapi-project.github.io/xen-api/classes/vm_appliance.html#start

I updated and rebooted our hosts more often when I used vApps, so would very much like to see this part of XOA.

@gskger XAPI may not get much above 2Gbps, so it is possible you would not get better performance with 10Gbps. Of course, that is looking at just raw bits-per-second, not factoring in all the other performance features on a real server class nic.

@olivierlambert Amazon must have patched their Xen / XAPI to have much higher speeds?

@planedrop what concurrency configuration settings are you referring to?

• XOA config?

• host network card config?

• SMB concurrency?

@stormi @Gaelfr

I noticed the there are updates to the Windows Templates. Clicking the or "EYE" in XOA, and the Description for "guest-templates-json-data-windows" seemed a tad smidgeon "buggy". Is that due to git revision description and there were no actual changes to Windows Templates?

Changelog
Patch   guest-templates-json-data-windows
Date    January 6, 2023 at 6:00 AM
Author Gael Duperrey <gduperrey@vates.fr> - 1.9.6-1.2
Description   - Add templates for rhel 9, CentOS Stream 8 and 9, Almalinux 9, Rockylinux 9, Oracle linux 9

guest-templates-json	Creates the default guest templates	1.9.6	1.2.xcpng8.2	29.21 KiB	
guest-templates-json-data-linux	Contains the default Linux guest templates	1.9.6	1.2.xcpng8.2	18.68 KiB	
guest-templates-json-data-other	Contains the default other guest templates	1.9.6	1.2.xcpng8.2	11.86 KiB	
guest-templates-json-data-windows	Contains the default Windows guest templates	1.9.6	1.2.xcpng8.2	14.38 KiB

@olivierlambert awesome!

I assume Windows VMs that get their drivers from Windows Update will not have this capability unless we install the simple service:1727.

On github, it says that the the VM service has to respond within 1 minute, but it would take several minutes to backup a database. The blog page says it will wait for answer. Sounds like Vates knows the answer is somewhere in between. We will wait, but only for so long

Specification

XO will waits for the request to be answered before starting the snapshot, but will not wait longer than 1 minute.

If the request fails for any reason, XO will go ahead with snapshot immediately.

Webhooks for snapshots [beta] says "It's now possible to notify a VM via an HTTP request before a snapshot. Xen Orchestra will wait for an answer before starting the actual snapshot."

Does udevadm work in XenServer? I am sure what I am trying to do is not supported, but would still think it would work.

More often than i care to admit, i need to get to the serial console port of various network switches. So i had a Linux box with a USB hub and . With a normal CentOS6 and CentOS7, i had given all kinds of /dev/ttyUSB_aliases to each different RS232 cable.

[xcpng host]# ls /dev/ttyU*
/dev/ttyUSB0
/dev/ttyUSB0_ServerNetworkSwitch0
/dev/ttyUSB1
/dev/ttyUSB1_StorageNetworkSwitch1
/dev/ttyUSB2
/dev/ttyUSB2_StorageNetworkArista40Gb_Only200dollars

Each of the cables has a unique embedded serial number and I use the serial number to name each cable.

[xcpng host]# udevadm info /sys/bus/usb/devices/2-4.3
[xcpng host]# udevadm info /dev/ttyUSB0 | egrep  '(SERIAL)'
E: ID_SERIAL=FTDI_FT232R_USB_UART_AM00I2M5
E: ID_SERIAL_SHORT=AM00I2M5

Adding the following to /etc/udev/rules.d/57-usb.rules does not give me the symbolic links.

ENV{ID_SERIAL_SHORT}=="AM00I2M5", SYMLINK+="ttyUSB_AM00I2M5", SYMLINK+="ttyUSBARISTA1", SYMLINK+="ttyUSB_ARISTA1_Storage10GbX48"
ENV{ID_SERIAL_SHORT}=="AK08S3EG", SYMLINK+="ttyUSB_AK08S3EG", SYMLINK+="ttyUSBARISTA2", SYMLINK+="ttyUSB_ARISTA2_ServerSwitch_TopOfRack"
ENV{ID_SERIAL_SHORT}=="AK08S4NU", SYMLINK+="ttyUSB_AK08S4NU", SYMLINK+="ttyUSBARISTA3", SYMLINK+="ttyUSB_ARISTA3_Storage40GbX32"

udevadm trigger or unplugging the USB hub to force it udev to reevaluate does not result in my sanity shortcuts:

[xcpng host]# find /dev -iname 'ttyU*'
/dev/ttyUSB2
/dev/ttyUSB1
/dev/ttyUSB0

@encryptblockr hope to try the same with their even smaller "CORE" images. There is not an .OVA download but .xz downloads that when expanded have .img .

https://cdimage.ubuntu.com/ubuntu-core/22/stable/current/ubuntu-core-22-amd64.img.xz

and

https://cdimage.ubuntu.com/ubuntu-core/22/stable/current/ubuntu-core-22-amd64+intel-iot.img.xz

cloud-init seems to require experimentation and these small images boot quickly for me.

Are you then following Fohdeesha's instructions?

@encryptblockr Did the new 2022-11-24 images work better?
Did you remember to install cloud-initramfs-growroot ?

packages:

• xe-guest-utilities
• cloud-initramfs-growroot
• cloud-initramfs-rescuevol

Please, Please, Please make this document itself with bash variables when it comes to the various UUIDs:

[XCP-ngHostX]# SRuuid=$(xe sr-list name-label="Local storage" --minimal)
[XCP-ngHostX]# RunXdebTemplateName="My RunX Template based on Deb10"
[XCP-ngHostX]# RUNXdebTEMPLATEuuid=$(xe vm-install template="Debian Buster 10" new-name-label="${RunXdebTemplateName}" sr-uuid=${SRuuid} --minimal)
[XCP-ngHostX]# echo ${RUNXdebTEMPLATEuuid}
[XCP-ngHostX]# xe vm-param-set uuid=${RUNXdebTEMPLATEuuid} HVM-boot-policy=""
[XCP-ngHostX]# xe vm-param-set uuid=${RUNXdebTEMPLATEuuid} PV-args=""
[XCP-ngHostX]# xe vm-param-set uuid=${RUNXdebTEMPLATEuuid} VCPUs-max=2
[XCP-ngHostX]# xe vm-param-set uuid=${RUNXdebTEMPLATEuuid} VCPUs-at-startup=2
[XCP-ngHostX]# xe vm-disk-remove device=0 uuid=${RUNXdebTEMPLATEuuid}
[XCP-ngHostX]# xe template-param-set is-a-template=true uuid=${RUNXdebTEMPLATEuuid}
[XCP-ngHostX]# xe template-list name-label="${RunXdebTemplateName}"
[XCP-ngHostX]# xe template-list uuid=${RUNXdebTEMPLATEuuid}

@tony ssh is not always an option especially for premade ISOs from vendors. DellOpenManage VM for instance was vmware only and ssh was not enabled.

@tsettle Glad to hear this. I had tried getting GNS3 working for a long time but gave up and ran it under ProxMox. Is it still working? Do you mind sharing the guide you used? I have always thought it cool to havae a Xen Orchestra recipe / ansible build.

• Win2019 msconfig.exe seems to be in "safe-mode part way" because msconfig.exe will not let me choose a normal startup. It reverts back to "Selective Startup".
• "Normal Startup" radio box will not stick. Click "Normal Startup" radio box and then "OK" button to exit msconfig.exe. Relaunch msconfig.exe and notice it reverted back to "Selective Startup".
• The Win2019 VMs seem to run ok, but some hard to resolve problem with an application I trying to resolve.
• Anybody else see this issue?
• Have no idea if this has anything to do with XCP-ng or not.
• Windows update drivers.

Guest UEFI Secure Boot looks like a great guide. Everyone needs to read the "Boothole and fallouts" section.

@stormi Installation of MS KB4535680 is failing for us as well as many others. To be clear, we have not downloaded the latest patches mentioned in XOA. Will simply installing the latest ca-certificates (dated Sept 14, 2021) and updated grub-efi (dated June 29, 2021) along with the other updates such as xcp-ng-release-config 8.2.0-8 fix this or do we have to manually make changes mentioned above as well?

I expect having Windows reboot into UEFI and configuring the UEFI to attempt secure boot will be necessary no matter what. Meeting with a software vendor later today and they may ask why MS KB4535680 is not installed.

@olivierlambert
So 39% on the Citrix host shows as 0% in XO,
but 51% on the Citrix host shows as 100% in XO.
Got it. Hopefully, we can put that nonsense behind us soon.