[Yahoo-eng-team] [Bug 1866106] Re: Can't set "pointer_model = None" in nova.conf
** Changed in: oslo.config
Status: New => Won't Fix
** Tags added: config libvirt
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https://bugs.launchpad.net/bugs/1866106
Title:
Can't set "pointer_model = None" in nova.conf
Status in OpenStack Compute (nova):
In Progress
Status in oslo.config:
Won't Fix
Bug description:
Description
===
nova.conf includes option pointer_model. The help text in the config
has 2 "possible values" sections (copied below) specifying either
"None" or "" as correct values. Neither of these is accepted by
Nova. Here are the error messages from nova-compute.log:
2020-03-03 11:05:17.233 228915 ERROR nova ConfigFileValueError: Value
for option pointer_model is not valid: Valid values are [None,
ps2mouse, usbtablet], but found ''
2020-03-03 11:06:24.761 229290 ERROR nova ConfigFileValueError: Value
for option pointer_model is not valid: Valid values are [None,
ps2mouse, usbtablet], but found 'None'
#
# Generic property to specify the pointer type.
#
# Input devices allow interaction with a graphical framebuffer. For
# example to provide a graphic tablet for absolute cursor movement.
#
# If set, the 'hw_pointer_model' image property takes precedence over
# this configuration option.
#
# Possible values:
#
# * None: Uses default behavior provided by drivers (mouse on PS2 for
# libvirt x86)
# * ps2mouse: Uses relative movement. Mouse connected by PS2
# * usbtablet: Uses absolute movement. Tablet connect by USB
#
# Related options:
#
# * usbtablet must be configured with VNC enabled or SPICE enabled and SPICE
# agent disabled. When used with libvirt the instance mode should be
# configured as HVM.
# (string value)
# Possible values:
# -
# ps2mouse -
# usbtablet -
#pointer_model = usbtablet
Steps to reproduce
==
On an openstack hypervisor:
1. Edit nova.conf and change line "#pointer_model = usbtablet" to either
"pointer_model = None" or "pointer_model = "
2. Restart nova-compute service
3. Tail nova-compute.log
Expected result
===
Nova runs without errors and does not load the USB driver.
Actual result
=
Nova throws the error described above.
Environment
===
1. Openstack version is Rocky:
root@us01odc-p01-hv227:~# dpkg -l | grep nova
ii nova-common 2:18.2.1-0ubuntu1~cloud4
all OpenStack Compute - common files
ii nova-compute 2:18.2.1-0ubuntu1~cloud4
all OpenStack Compute - compute node base
ii nova-compute-kvm 2:18.2.1-0ubuntu1~cloud4
all OpenStack Compute - compute node (KVM)
ii nova-compute-libvirt 2:18.2.1-0ubuntu1~cloud4
all OpenStack Compute - compute node libvirt support
ii python-nova 2:18.2.1-0ubuntu1~cloud4
all OpenStack Compute Python 2 libraries
ii python-novaclient 2:11.0.0-0ubuntu1~cloud0
all client library for OpenStack Compute API - Python 2.7
2. Hypervisor: libvirt+KVM
root@us01odc-p01-hv227:~# libvirtd --version
libvirtd (libvirt) 4.0.0
root@us01odc-p01-hv227:~# kvm --version
QEMU emulator version 2.11.1(Debian 1:2.11+dfsg-1ubuntu7.21)
Copyright (c) 2003-2017 Fabrice Bellard and the QEMU Project developers
3. Storage type: local LVM
root@us01odc-p01-hv227:~# lvm version
LVM version: 2.02.176(2) (2017-11-03)
Library version: 1.02.145 (2017-11-03)
Driver version: 4.39.0
Configuration: ./configure --build=x86_64-linux-gnu --prefix=/usr
--includedir=${prefix}/include --mandir=${prefix}/share/man
--infodir=${prefix}/share/info --sysconfdir=/etc --localstatedir=/var
--disable-silent-rules --libdir=${prefix}/lib/x86_64-linux-gnu
--libexecdir=${prefix}/lib/x86_64-linux-gnu --runstatedir=/run
--disable-maintainer-mode --disable-dependency-tracking --exec-prefix=
--bindir=/bin --libdir=/lib/x86_64-linux-gnu --sbindir=/sbin
--with-usrlibdir=/usr/lib/x86_64-linux-gnu --with-optimisation=-O2
--with-cache=internal --with-clvmd=corosync --with-cluster=internal
--with-device-uid=0 --with-device-gid=6 --with-device-mode=0660
--with-default-pid-dir=/run --with-default-run-dir=/run/lvm
--with-default-locking-dir=/run/lock/lvm --with-thin=internal
--with-thin-check=/usr/sbin/thin_check --with-thin-dump=/usr/sbin/thin_dump
--with-thin-repair=/usr/sbin/thin_repair --enable-applib --enable-blkid_wiping
--enable-cmdlib --enable-cmirrord --enable-dmeventd --enable-dbus-service
--enable-lvmetad --enable-lvmlockd-dlm --enable-lvmlockd-sanlock
--enable-lvmpolld --enable-notify-dbus
[Yahoo-eng-team] [Bug 1866106] Re: Can't set "pointer_model = None" in nova.conf
The problem is in oslo.config I think right here:
https://github.com/openstack/oslo.config/blob/20a7cee3e3019d60c4b367bb76922a1db41d1750/oslo_config/types.py#L142
That's coercing the value None to a string 'None' so it fails. According
to Ben Nemec:
(02:13:48 PM) bnemec: The only way for a config opt to have a None value is for
that to be the default and for the opt to be unset.
(02:14:14 PM) bnemec: So completely absent from the file, not something like
"opt="
But that seems like a bug because I would think that code could be
smarter about not coercing the value if the value is None, None is a
valid choice and a default is set (so you need to override the default).
** Also affects: oslo.config
Importance: Undecided
Status: New
--
You received this bug notification because you are a member of Yahoo!
Engineering Team, which is subscribed to OpenStack Compute (nova).
https://bugs.launchpad.net/bugs/1866106
Title:
Can't set "pointer_model = None" in nova.conf
Status in OpenStack Compute (nova):
Confirmed
Status in oslo.config:
New
Bug description:
Description
===
nova.conf includes option pointer_model. The help text in the config
has 2 "possible values" sections (copied below) specifying either
"None" or "" as correct values. Neither of these is accepted by
Nova. Here are the error messages from nova-compute.log:
2020-03-03 11:05:17.233 228915 ERROR nova ConfigFileValueError: Value
for option pointer_model is not valid: Valid values are [None,
ps2mouse, usbtablet], but found ''
2020-03-03 11:06:24.761 229290 ERROR nova ConfigFileValueError: Value
for option pointer_model is not valid: Valid values are [None,
ps2mouse, usbtablet], but found 'None'
#
# Generic property to specify the pointer type.
#
# Input devices allow interaction with a graphical framebuffer. For
# example to provide a graphic tablet for absolute cursor movement.
#
# If set, the 'hw_pointer_model' image property takes precedence over
# this configuration option.
#
# Possible values:
#
# * None: Uses default behavior provided by drivers (mouse on PS2 for
# libvirt x86)
# * ps2mouse: Uses relative movement. Mouse connected by PS2
# * usbtablet: Uses absolute movement. Tablet connect by USB
#
# Related options:
#
# * usbtablet must be configured with VNC enabled or SPICE enabled and SPICE
# agent disabled. When used with libvirt the instance mode should be
# configured as HVM.
# (string value)
# Possible values:
# -
# ps2mouse -
# usbtablet -
#pointer_model = usbtablet
Steps to reproduce
==
On an openstack hypervisor:
1. Edit nova.conf and change line "#pointer_model = usbtablet" to either
"pointer_model = None" or "pointer_model = "
2. Restart nova-compute service
3. Tail nova-compute.log
Expected result
===
Nova runs without errors and does not load the USB driver.
Actual result
=
Nova throws the error described above.
Environment
===
1. Openstack version is Rocky:
root@us01odc-p01-hv227:~# dpkg -l | grep nova
ii nova-common 2:18.2.1-0ubuntu1~cloud4
all OpenStack Compute - common files
ii nova-compute 2:18.2.1-0ubuntu1~cloud4
all OpenStack Compute - compute node base
ii nova-compute-kvm 2:18.2.1-0ubuntu1~cloud4
all OpenStack Compute - compute node (KVM)
ii nova-compute-libvirt 2:18.2.1-0ubuntu1~cloud4
all OpenStack Compute - compute node libvirt support
ii python-nova 2:18.2.1-0ubuntu1~cloud4
all OpenStack Compute Python 2 libraries
ii python-novaclient 2:11.0.0-0ubuntu1~cloud0
all client library for OpenStack Compute API - Python 2.7
2. Hypervisor: libvirt+KVM
root@us01odc-p01-hv227:~# libvirtd --version
libvirtd (libvirt) 4.0.0
root@us01odc-p01-hv227:~# kvm --version
QEMU emulator version 2.11.1(Debian 1:2.11+dfsg-1ubuntu7.21)
Copyright (c) 2003-2017 Fabrice Bellard and the QEMU Project developers
3. Storage type: local LVM
root@us01odc-p01-hv227:~# lvm version
LVM version: 2.02.176(2) (2017-11-03)
Library version: 1.02.145 (2017-11-03)
Driver version: 4.39.0
Configuration: ./configure --build=x86_64-linux-gnu --prefix=/usr
--includedir=${prefix}/include --mandir=${prefix}/share/man
--infodir=${prefix}/share/info --sysconfdir=/etc --localstatedir=/var
--disable-silent-rules --libdir=${prefix}/lib/x86_64-linux-gnu
--libexecdir=${prefix}/lib/x86_64-linux-gnu --runstatedir=/run
--disable-maintainer-mode --disable-dependency-tracking --exec-prefix=
--bindir=/bin --libdir=/lib/x86_64-linux-gnu --sbindir=/sbin
