From 7c7682149940465acb3d9c5023262af97886055c Mon Sep 17 00:00:00 2001
From: Balazs Gibizer <balazs.gibizer@est.tech>
Date: Fri, 11 Jun 2021 18:10:12 +0200
Subject: [PATCH] Add debug log for device detach libvirt error

We see a new way of virDomainDetachDeviceFlags() to fail in bug 1931716.
This patch logs the libvirt error code and error message.

Change-Id: I7ec4ea68a933d1cb415c4adee97a508cf9611468
Related-Bug: #1931716
---
 nova/virt/libvirt/driver.py | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/nova/virt/libvirt/driver.py b/nova/virt/libvirt/driver.py
index 391231c52775..33fd64bee90d 100644
--- a/nova/virt/libvirt/driver.py
+++ b/nova/virt/libvirt/driver.py
@@ -2499,6 +2499,11 @@ class LibvirtDriver(driver.ComputeDriver):
         except libvirt.libvirtError as ex:
             code = ex.get_error_code()
             msg = ex.get_error_message()
+            LOG.debug(
+                "Libvirt returned error while detaching device %s from "
+                "instance %s. Libvirt error code: %d, error message: %s.",
+                device_name, instance_uuid, code, msg
+            )
             if code == libvirt.VIR_ERR_DEVICE_MISSING:
                 LOG.debug(
                     'Libvirt failed to detach device %s from instance %s '