@Aeoran AFAIK, the XAPI database gets wiped whenever you add or remove the host from a pool. You may be able to restore metadata to the old master once it is no longer belongs to the pool, but I can't guarantee that this will work or not produce other issues.

If you don't have backups of the VMs, then you should be able to copy the VHD files to another location by accessing the directory /run/sr-mount/<SR UUID>/ on the old master.

@olivierlambert - it has been resolved.

Solved by 583c728

Ping @julien-f in case it was missed

@paulorrockgit

This is clever!

@Danp Thanks for the tip bud!
I will search that topic and experiment some more.

Its almost certainly goes through XOA. When I was moving from Esxi to XCP-NG I abandoned the process, then beefed up my XOA memory and CPU cores and it sped up marginally. That was a while ago, some of the VM's I had to use Clonezilla on (too large and kept failing). From what Ive read the migration tool has improved dramatically since then.

If you have hardware that supports this you can try to do an openvpn Server as a TAP adapter. it will be closer to a Layer 2 MPLS connection than an IPSEC tunnel. I have no idea if XCP-NG or XO/XOA use any type of Multicast traffic to communicate. Thats the only thing I can think of unless you have IPSEC firewall policies blocking some type of traffic that XO needs. I presume you can ping/ssh into the remote host? Are these hosts using shared storage over the MPLS/IPSEC?

Edit:
I just found this as well.
https://xcp-ng.org/forum/topic/6609/unable-to-join-a-host-to-a-pool

Seems to be also that the XCP-NG hosts will attempt to talk to each other over local URL's in some cases but I can't find a post about that. Bridging the two networks the same way the MPLS was would likely get you back to the way it was.

I found the problem.
I am using OPNsense and forgot to disable TX checksum offloading. Very interesting that this checksum offloading caused catastrophic network disruptions on a Realtek nic, but no noticeable performance hit on Intel nics. This was an old host that featured a Realtek card. All my recent hosts that I use have only Intel nics. That is why I forgot about the whole offloading thing.

Thanks for the tips.

Best wishes to the whole community!

Hi @Danp,
Sorry, it was my mistake.

@olivierlambert Gotcha, totally agree, super low on the list of things to do.

I do wonder if maybe a note should be added somewhere saying you'll have to manually rename the files after importing? Maybe hear near the note about ISO importing?

84aee289-b7e6-4bcc-a1b8-1edfbe5ba107-image.png

To add custom ACLs and Groups, you would do this from Settings > Groups and Settings > ACLs

d8339fae-5a66-4caf-9e78-9ad779437c9b-image.png

Settings > Groups allows you to create and name a group (which contains users).
Settings > ACLs is where you set permissions, and then apply those permissions to a group (or individual user.

@Tristis-Oris That is what it definitely did in the past (can't say for sure as to when). I suspect this has to do with Internet Explorer being killed off (due to compatibility issues) and Edge taking its place.

Actually I was just able to confirm this. @danp happened to reach out and suggested I try this registry edit, which in fact did fix the issue, https://gist.github.com/jeremyrsellars/364ea48ea067505037ef

Of course, having to make edits to each or multiple workstations kind of sucks.

Thanks for your replies. Since the advent of mirror backups I realised there was an opportunity to backup to several different USB disks where each disk is a different remote allowing rotation of the disks. The primary backup goes to additional internal storage which is then mirrored to the USB disks. Only one snapshot per vm is needed regardless of how many USB disks are in use. To do this I need to script the mounting process for these disks and send notification emails when a disk is mounted, unmounted (safe to unplug) or when no disk could be found.
This is my use case.
Thanks

The process of adding new icons is supposed to be easier in XO6. You may want to open an issue on Github requesting the addition of this icon.

@OskarNTT Put the snapshot's UUID into the filter at the top right. This should show you all activity involving this snapshot, including when it was created. The vm.snapshot record contains the UUID of the target VM. In the latest releases of XO, you can click the UUID to be taken to the associated object.

@Tomcatter Great! 🙂

xe pool-list will give you the UUID of the master host. xe host-list will give you the host name. You can use a combination of xe commands to get the name of the master host --

xe host-param-get param-name=name-label uuid=`xe pool-list | grep master | awk '{print $4}'`

Once you bring back up the old server, XO is smart enough to detect that it is no longer the master and will determine the correct host within the pool.

Great!!

@DustinB

If I type it in the filter box on the Home page, it is not found.

If I type it in the filter box on the Templates page, it is found and Shows

Oracle Linux 7

if I list all the templates with xe template-list, it is not in the list