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WSL Version：
```
NAME STATE VERSION
* Ubuntu-22.04 Running 2
```
When I restart WSL and libvirtd, libvirtd looks fine.
```
oyal@PS2022NGOBPSKS:/mnt/c/Users/Admin$ sudo systemctl status libvirtd
Failed to dump process list for 'libvirtd.service', ignoring: Input/output error
● libvirtd.service - Virtualization daemon
Loaded: loaded (/lib/systemd/system/libvirtd.service; enabled; vendor preset: enabled)
Active: activating (auto-restart) (Result: exit-code) since Mon 2024-03-04 16:11:47 CST; 58ms ago
TriggeredBy: ● libvirtd-admin.socket
● libvirtd-ro.socket
● libvirtd.socket
Docs: man:libvirtd(8)
https://libvirt.org
Process: 375 ExecStart=/usr/sbin/libvirtd $LIBVIRTD_ARGS (code=exited, status=1/FAILURE)
Main PID: 375 (code=exited, status=1/FAILURE)
Tasks: 21 (limit: 32768)
Memory: 28.2M
CGroup: /system.slice/libvirtd.service
```
When I run `virt-manager`：
Virtual Machine Manager Connection Failure
```
Unable to connect to libvirt qemu:///system.
Verify that the 'libvirtd' daemon is running.
Libvirt URI is: qemu:///system
Traceback (most recent call last):
File "/usr/share/virt-manager/virtManager/connection.py", line 923, in _do_open
self._backend.open(cb, data)
File "/usr/share/virt-manager/virtinst/connection.py", line 153, in open
conn = libvirt.openAuth(self._open_uri,
File "/usr/lib/python3/dist-packages/libvirt.py", line 148, in openAuth
raise libvirtError('virConnectOpenAuth() failed')
libvirt.libvirtError: Failed to connect socket to '/var/run/libvirt/libvirt-sock': Connection refused
```
Execute `sudo systemctl status libvirtd` again:
```
sudo systemctl status libvirtd
Failed to dump process list for 'libvirtd.service', ignoring: Input/output error
× libvirtd.service - Virtualization daemon
Loaded: loaded (/lib/systemd/system/libvirtd.service; enabled; vendor preset: enabled)
Active: failed (Result: exit-code) since Mon 2024-03-04 16:11:47 CST; 38s ago
TriggeredBy: × libvirtd-admin.socket
× libvirtd-ro.socket
× libvirtd.socket
Docs: man:libvirtd(8)
https://libvirt.org
Process: 375 ExecStart=/usr/sbin/libvirtd $LIBVIRTD_ARGS (code=exited, status=1/FAILURE)
Main PID: 375 (code=exited, status=1/FAILURE)
Tasks: 21 (limit: 32768)
Memory: 28.1M
CGroup: /system.slice/libvirtd.service
Mar 04 16:11:47 PS2022NGOBPSKS systemd[1]: libvirtd.service: Scheduled restart job, restart counter is at 5.
Mar 04 16:11:47 PS2022NGOBPSKS systemd[1]: Stopped Virtualization daemon.
Mar 04 16:11:47 PS2022NGOBPSKS systemd[1]: libvirtd.service: Start request repeated too quickly.
Mar 04 16:11:47 PS2022NGOBPSKS systemd[1]: libvirtd.service: Failed with result 'exit-code'.
Mar 04 16:11:47 PS2022NGOBPSKS systemd[1]: Failed to start Virtualization daemon.
```
journalctl -u libvirtd
```
Mar 04 16:11:45 PS2022NGOBPSKS systemd[1]: libvirtd.service: Failed to migrate controller cgroups from /system.slice/libvirtd.service, ignoring: Input/output error
Mar 04 16:11:45 PS2022NGOBPSKS systemd[1]: Starting Virtualization daemon...
Mar 04 16:11:45 PS2022NGOBPSKS libvirtd[371]: libvirt version: 8.0.0, package: 1ubuntu7.8 (Lena Voytek <lena.voytek@canonical.com> Wed, 29 Nov 2023 14:52:52 -0700)
Mar 04 16:11:45 PS2022NGOBPSKS libvirtd[371]: hostname: PS2022NGOBPSKS
Mar 04 16:11:45 PS2022NGOBPSKS libvirtd[371]: Failed to acquire pid file '/run/libvirtd.pid': Resource temporarily unavailable
Mar 04 16:11:45 PS2022NGOBPSKS systemd[1]: libvirtd.service: Main process exited, code=exited, status=1/FAILURE
Mar 04 16:11:45 PS2022NGOBPSKS systemd[1]: libvirtd.service: Failed with result 'exit-code'.
Mar 04 16:11:45 PS2022NGOBPSKS systemd[1]: Failed to start Virtualization daemon.
Mar 04 16:11:46 PS2022NGOBPSKS systemd[1]: libvirtd.service: Scheduled restart job, restart counter is at 1.
Mar 04 16:11:46 PS2022NGOBPSKS systemd[1]: Stopped Virtualization daemon.
Mar 04 16:11:46 PS2022NGOBPSKS systemd[1]: Starting Virtualization daemon...
Mar 04 16:11:46 PS2022NGOBPSKS libvirtd[372]: libvirt version: 8.0.0, package: 1ubuntu7.8 (Lena Voytek <lena.voytek@canonical.com> Wed, 29 Nov 2023 14:52:52 -0700)
Mar 04 16:11:46 PS2022NGOBPSKS libvirtd[372]: hostname: PS2022NGOBPSKS
Mar 04 16:11:46 PS2022NGOBPSKS libvirtd[372]: Failed to acquire pid file '/run/libvirtd.pid': Resource temporarily unavailable
Mar 04 16:11:46 PS2022NGOBPSKS systemd[1]: libvirtd.service: Main process exited, code=exited, status=1/FAILURE
Mar 04 16:11:46 PS2022NGOBPSKS systemd[1]: libvirtd.service: Failed with result 'exit-code'.
Mar 04 16:11:46 PS2022NGOBPSKS systemd[1]: Failed to start Virtualization daemon.
Mar 04 16:11:46 PS2022NGOBPSKS systemd[1]: libvirtd.service: Scheduled restart job, restart counter is at 2.
Mar 04 16:11:46 PS2022NGOBPSKS systemd[1]: Stopped Virtualization daemon.
Mar 04 16:11:46 PS2022NGOBPSKS systemd[1]: Starting Virtualization daemon...
Mar 04 16:11:46 PS2022NGOBPSKS libvirtd[373]: libvirt version: 8.0.0, package: 1ubuntu7.8 (Lena Voytek <lena.voytek@canonical.com> Wed, 29 Nov 2023 14:52:52 -0700)
Mar 04 16:11:46 PS2022NGOBPSKS libvirtd[373]: hostname: PS2022NGOBPSKS
Mar 04 16:11:46 PS2022NGOBPSKS libvirtd[373]: Failed to acquire pid file '/run/libvirtd.pid': Resource temporarily unavailable
Mar 04 16:11:46 PS2022NGOBPSKS systemd[1]: libvirtd.service: Main process exited, code=exited, status=1/FAILURE
Mar 04 16:11:46 PS2022NGOBPSKS systemd[1]: libvirtd.service: Failed with result 'exit-code'.
Mar 04 16:11:46 PS2022NGOBPSKS systemd[1]: Failed to start Virtualization daemon.
Mar 04 16:11:46 PS2022NGOBPSKS systemd[1]: libvirtd.service: Scheduled restart job, restart counter is at 3.
Mar 04 16:11:46 PS2022NGOBPSKS systemd[1]: Stopped Virtualization daemon.
Mar 04 16:11:46 PS2022NGOBPSKS systemd[1]: Starting Virtualization daemon...
Mar 04 16:11:46 PS2022NGOBPSKS libvirtd[374]: libvirt version: 8.0.0, package: 1ubuntu7.8 (Lena Voytek <lena.voytek@canonical.com> Wed, 29 Nov 2023 14:52:52 -0700)
Mar 04 16:11:46 PS2022NGOBPSKS libvirtd[374]: hostname: PS2022NGOBPSKS
Mar 04 16:11:46 PS2022NGOBPSKS libvirtd[374]: Failed to acquire pid file '/run/libvirtd.pid': Resource temporarily unavailable
Mar 04 16:11:46 PS2022NGOBPSKS systemd[1]: libvirtd.service: Main process exited, code=exited, status=1/FAILURE
Mar 04 16:11:46 PS2022NGOBPSKS systemd[1]: libvirtd.service: Failed with result 'exit-code'.
Mar 04 16:11:46 PS2022NGOBPSKS systemd[1]: Failed to start Virtualization daemon.
Mar 04 16:11:47 PS2022NGOBPSKS systemd[1]: libvirtd.service: Scheduled restart job, restart counter is at 4.
Mar 04 16:11:47 PS2022NGOBPSKS systemd[1]: Stopped Virtualization daemon.
Mar 04 16:11:47 PS2022NGOBPSKS systemd[1]: Starting Virtualization daemon...
Mar 04 16:11:47 PS2022NGOBPSKS libvirtd[375]: libvirt version: 8.0.0, package: 1ubuntu7.8 (Lena Voytek <lena.voytek@canonical.com> Wed, 29 Nov 2023 14:52:52 -0700)
Mar 04 16:11:47 PS2022NGOBPSKS libvirtd[375]: hostname: PS2022NGOBPSKS
Mar 04 16:11:47 PS2022NGOBPSKS libvirtd[375]: Failed to acquire pid file '/run/libvirtd.pid': Resource temporarily unavailable
Mar 04 16:11:47 PS2022NGOBPSKS systemd[1]: libvirtd.service: Main process exited, code=exited, status=1/FAILURE
Mar 04 16:11:47 PS2022NGOBPSKS systemd[1]: libvirtd.service: Failed with result 'exit-code'.
Mar 04 16:11:47 PS2022NGOBPSKS systemd[1]: Failed to start Virtualization daemon.
Mar 04 16:11:47 PS2022NGOBPSKS systemd[1]: libvirtd.service: Scheduled restart job, restart counter is at 5.
Mar 04 16:11:47 PS2022NGOBPSKS systemd[1]: Stopped Virtualization daemon.
Mar 04 16:11:47 PS2022NGOBPSKS systemd[1]: libvirtd.service: Start request repeated too quickly.
Mar 04 16:11:47 PS2022NGOBPSKS systemd[1]: libvirtd.service: Failed with result 'exit-code'.
Mar 04 16:11:47 PS2022NGOBPSKS systemd[1]: Failed to start Virtualization daemon.
Mar 04 16:16:36 PS2022NGOBPSKS systemd[1]: Starting Virtualization daemon...
```
The main reason is: `Failed to acquire pid file '/run/libvirtd.pid': Resource temporarily unavailable`
I'm querying the backend and not running any libvirtd.
```
oyal@PS2022NGOBPSKS:/mnt/c/Users/Admin$ ps -aux | grep libvirtd
oyal 507 0.0 0.0 4032 2176 pts/2 S+ 16:20 0:00 grep --color=auto libvirtd
```
Last edited by oyal (2024-03-04 08:33:30)
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