virt-install でのエラー : Internal Error: process exited while connecting to monitor

virt-install または virt-managerVM を作成しようとすると、表題のエラーが出ました。

環境は以下。

  • CentOS7

調べていると、以下のページが見つかりました。

"/etc/libvirt/qemu.conf" に

# The user for QEMU processes run by the system instance. It can be
# specified as a user name or as a user id. The qemu driver will try to
# parse this value first as a name and then, if the name doesn't exist,
# as a user id.
#
# Since a sequence of digits is a valid user name, a leading plus sign
# can be used to ensure that a user id will not be interpreted as a user
# name.
#
# Some examples of valid values are:
#
#       user = "qemu"   # A user named "qemu"
#       user = "+0"     # Super user (uid=0)
#       user = "100"    # A user named "100" or a user with uid=100
#
# user = "root"

# The group for QEMU processes run by the system instance. It can be
# specified in a similar way to user.
# group = "root"

こんな部分があるので、"user = ..." と "group = ..." の行のコメントアウトを外すと無事に VM 作成出来ました。