libvirt users - May 2020 - virsh connect to xen:///system fails: "error: internal error: Unexpected driver type 'Xen' opened" ?

I'm setting up for libvirt remote access on a xend host.

On the host,

	xl info | egrep "release|xen_version"
		release                : 5.6.10-24.gde48f93-default
		xen_version            : 4.13.0_12-lp151.700
	systemctl --version
		systemd 234

I've installed

	rpm -qa libvirt-daemon-xen
		libvirt-daemon-xen-6.2.0-lp151.890.1.x86_64
	libvirtd --version
		libvirtd (libvirt) 6.2.0
	virsh --version
		6.2.0

Per

	https://libvirt.org/daemons.html

I've setup for use of modular daemons with systemd sockets, rather than
monolithic libvirtd

	systemctl list-units | egrep " virt"
	  virtxend.service                    loaded active running   Virtualization
xen daemon
	  virtlockd.socket                    loaded active listening Virtual machine
lock manager socket
	  virtlogd.socket                     loaded active listening Virtual machine
log manager socket
	  virtnetworkd-admin.socket           loaded active listening Libvirt network
admin socket
	  virtnetworkd-ro.socket              loaded active listening Libvirt network
local read-only socket
	  virtnetworkd.socket                 loaded active listening Libvirt network
local socket
	  virtnodedevd-admin.socket           loaded active listening Libvirt nodedev
admin socket
	  virtnodedevd-ro.socket              loaded active listening Libvirt nodedev
local read-only socket
	  virtnodedevd.socket                 loaded active listening Libvirt nodedev
local socket
	  virtnwfilterd-admin.socket          loaded active listening Libvirt nwfilter
admin socket
	  virtnwfilterd-ro.socket             loaded active listening Libvirt nwfilter
local read-only socket
	  virtnwfilterd.socket                loaded active listening Libvirt nwfilter
local socket
	  virtproxyd-admin.socket             loaded active listening Libvirt proxy
admin socket
	  virtproxyd-ro.socket                loaded active listening Libvirt proxy
local read-only socket
	  virtproxyd.socket                   loaded active listening Libvirt proxy
local socket
	  virtsecretd-admin.socket            loaded active listening Libvirt secret
admin socket
	  virtsecretd-ro.socket               loaded active listening Libvirt secret
local read-only socket
	  virtsecretd.socket                  loaded active listening Libvirt secret
local socket
	  virtstoraged-admin.socket           loaded active listening Libvirt storage
admin socket
	  virtstoraged-ro.socket              loaded active listening Libvirt storage
local read-only socket
	  virtstoraged.socket                 loaded active listening Libvirt storage
local socket
	  virtxend-admin.socket               loaded active running   Libvirt libxl
admin socket
	  virtxend-ro.socket                  loaded active running   Libvirt libxl
local read-only socket
	  virtxend.socket                     loaded active running   Libvirt libxl
local socket

	/tree /run/libvirt/
		/run/libvirt/
		??? hostdevmgr
		??? libvirt-admin-sock
		??? libvirt-sock
		??? libvirt-sock-ro
		??? libxl
		??? ??? autostarted
		??? ??? Domain-0.xml
		??? ??? driver.pid
		??? network
		??? ??? autostarted
		??? ??? nwfilter.leases
		??? nodedev
		??? nwfilter
		??? nwfilter-binding
		??? qemu
		??? ??? autostarted
		??? ??? slirp
		??? secrets
		??? storage
		??? ??? autostarted
		??? virtlockd-sock
		??? virtlogd-sock
		??? virtnetworkd-admin-sock
		??? virtnetworkd-sock
		??? virtnetworkd-sock-ro
		??? virtnodedevd-admin-sock
		??? virtnodedevd-sock
		??? virtnodedevd-sock-ro
		??? virtnwfilterd-admin-sock
		??? virtnwfilterd-sock
		??? virtnwfilterd-sock-ro
		??? virtsecretd-admin-sock
		??? virtsecretd-sock
		??? virtsecretd-sock-ro
		??? virtstoraged-admin-sock
		??? virtstoraged-sock
		??? virtstoraged-sock-ro
		??? virtxend-admin-sock
		??? virtxend-sock
		??? virtxend-sock-ro


On the server, TLS certs are in place

	openssl version
		OpenSSL 1.1.1g  21 Apr 2020
	cat /etc/libvirt/libvirt.conf
		ca_file   = "/sec/ssl/CA/CA.CHAIN.crt.pem"
		cert_file = "/sec/ssl/libvirt/client.EC.crt.pem"
		key_file  = "/sec/ssl/libvirt/client.EC.key.pem"
	cat /etc/libvirt/virtproxyd.conf
		ca_file   = "/sec/ssl/CA/CA.CHAIN.crt.pem"
		cert_file = "/sec/ssl/libvirt/server.EC.crt.pem"
		key_file  = "/sec/ssl/libvirt/server.EC.key.pem"

On attempt to first _locally_ connect,

	virsh -c test:///default list sysinfo
		 Id   Name   State
		----------------------
		 1    test   running
	virsh -c test:///default sysinfo
		<sysinfo type='smbios'>
		  <bios>
		    <entry name='vendor'>LENOVO</entry>
		    <entry name='version'>G4ETA1WW (2.61 )</entry>
		    <entry name='date'>05/07/2014</entry>
		    <entry name='release'>2.61</entry>
		  </bios>
		</sysinfo>

but

	virsh -c xen:///system?socket=/var/run/libvirt/libvirt-sock
		error: failed to connect to the hypervisor
		error: internal error: Unexpected driver type 'Xen' opened

What's missing/incorrect in my config, causing the "Unexpected
driver" error, and preventing the connect to local hypervisor?

On Mon, May 04, 2020 at 09:33:47AM -0700, PGNet Dev
wrote:
> I've setup for use of modular daemons with systemd sockets, rather than
monolithic libvirtd
snip
> 	virsh -c xen:///system?socket=/var/run/libvirt/libvirt-sock
> 		error: failed to connect to the hypervisor
> 		error: internal error: Unexpected driver type 'Xen' opened
> 
> What's missing/incorrect in my config, causing the "Unexpected
driver" error, and preventing the connect to local hypervisor?
Looks like you found a bug in the modular deamon code. I've copied you
on a patch that should solve it.

Regards,
Daniel
-- 
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On 5/4/20 9:49 AM, Daniel P. Berrangé wrote:
> Looks like you found a bug in the modular deamon code. I've copied you
> on a patch that should solve it.

thx! will apply, and let distro know as well.



o/