Moving a VM to a new host in Xen Orchestra

larsen161

What are the requirements to migrate a VM in Xen Orchestra? At the moment I'm getting the following immediately as I try to initiate the move.

"The action failed for an unknown reason."
0_1456749506339_Screen Shot 2016-02-29 at 12.33.00.png

All on same 6.5 SP1 version, hosts both have same SR linked which is used for ISOs, CPUs are even in the same 5500 series.

I've been able to copy the VM to the new host and managing that way so far.

Danp

I ran into this last week. Chances are you have more than one snapshot, which will yield this result.

larsen161

No snapshots yet for this VM or any of the others I've tried. It's a very new install and just testing out all the functionality to get used to what we may need to do in certain situations prior to needing to do them.

Danp

How are you running XO (ie: crontab or systemctl)? You need to check the output from xo-server to get more details on why the migration is failing.

larsen161

@Danp ah, so a requirement seems to be that is must be running.

Feb 29 17:56:28 servervm-001-xo xo-server[553]: Mon, 29 Feb 2016 17:56:28 GMT xo:api steve@gett.com | vm.migrate(...) [8ms] =!> Error: cannot migrate a non-running VM

But then I get...

Feb 29 18:00:34 servervm-001-xo xo-server[553]: Mon, 29 Feb 2016 18:00:34 GMT xo:api steve@gett.com | vm.migrate(...) [12ms] =!> TypeError: Cannot read property '$ref' of null

Danp

Yeah... that's a current XS limitation that the VM must be running in order to migrate it.

Danp

Haven't seen the 2nd error before. Are you running the latest version of XO?

Danp

Perhaps this thread will help.

larsen161

@Danp recent enough I would hope, not on 4.14 yet. xo-web 4.13.0

larsen161

@Danp said:

Perhaps this thread will help.

could be the culprit. now trying to find out how to set/change the default SR

larsen161

@Danp yup, that was it. now onto troubleshooting the next set of errors. First one was quite obvious, destination host didn't have enough RAM. The other two though I'm not finding a table of what those feature codes translate to.

vm.migrate(...) [601ms] =!> XapiError: HOST_NOT_ENOUGH...36296192)

vm.migrate(...) [738ms] =!> XapiError: VM_LACKS_FEATUR...cdfd0954)

vm.migrate(...) [639ms] =!> XapiError: VM_LACKS_FEATURE_SU...1cdfd0954)

Am I missing some vital info, it seem to be truncating some details there when I run the following to get those results

sudo systemctl status xo-server.service

Danp

To eliminate the truncation, add the line verboseApiLogsOnErrors: true to the file .xo-server.yaml, like this:

sudo sed -i "$ a verboseApiLogsOnErrors: true" /opt/xo-server/.xo-server.yaml

Then restart xo-server.

Danp

From the API docs:

olivier

This means your VM doesn't have tools installed or your guest doesn't support "soft" calls to suspend/shutdown it (but hard reboot/shutdown always work, that's like pulling the power cord).

larsen161

thanks for the tips. i didn't have vm tools installed on some hosts but didn't have a chance to check again today so perhaps tomorrow success after ensuring tools are installed on all hosts. they are all on HP Proliants and just Ubuntu/Win hosts so nothing unusual that I'd expect to not support this I hope.