[Pkg-libvirt-maintainers] Bug#833866: please consider adding an option to suspend/resume all domains

[Marc Haber]

Package: libvirt-daemon
Version: 2.1.0-1
Severity: wishlist
File: /usr/lib/libvirt/libvirt-guests.sh

Hi,

the script /usr/lib/libvirt/libvirt-guests.sh is used to shut down or
suspend domains when the host goes down. This works like a charm.

However, currently, KVM has the issue that the host going to _sleep_
sometimes affects the running domains: It sometimes happens that the
domains become unresponsive CPU-hogs. I think that it might help to
suspend the KVM domains before the host sleeps. systemd provides a
mechanism to do that by means of /lib/systemd/system-sleep/.

/usr/lib/libvirt/libvirt-guests.sh contains most of the code needed to
suspend all running domains, but it doesn't expose those mechanisms to
the public.

Please consider adding a "suspend" and a "resume" option to
/usr/lib/libvirt/libvirt-guests.sh that applies the respective
operation to all domains even if the selected shutdown operation is
"shutdown".

I am willing to provide a patch if you indicate that you would accept
it.

Thanks for your consideration.

Greetings
Marc

-- System Information:
Debian Release: stretch/sid
  APT prefers unstable
  APT policy: (500, 'unstable')
Architecture: amd64 (x86_64)

Kernel: Linux 4.7.0-zgws1 (SMP w/6 CPU cores)
Locale: LANG=en_DK.utf8, LC_CTYPE=en_DK.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages libvirt-daemon depends on:
ii  libapparmor1        2.10.95-4
ii  libaudit1           1:2.6.5-1
ii  libavahi-client3    0.6.32-1
ii  libavahi-common3    0.6.32-1
ii  libblkid1           2.28-6
ii  libc6               2.23-4
ii  libcap-ng0          0.7.7-3
ii  libdbus-1-3         1.10.8-1
ii  libdevmapper1.02.1  2:1.02.130-1
ii  libfuse2            2.9.7-1
ii  libgnutls30         3.5.2-2
ii  libnetcf1           1:0.2.8-1
ii  libnl-3-200         3.2.27-1
ii  libnl-route-3-200   3.2.27-1
ii  libnuma1            2.0.11-1
ii  libparted2          3.2-15
ii  libpcap0.8          1.7.4-2
ii  libpciaccess0       0.13.4-1
ii  librados2           0.80.11-1
ii  librbd1             0.80.11-1
ii  libsasl2-2          2.1.26.dfsg1-15
ii  libselinux1         2.5-3
ii  libssh2-1           1.7.0-1
ii  libudev1            231-1
ii  libvirt0            2.1.0-1
ii  libxen-4.6          4.6.0-1+nmu2
ii  libxenstore3.0      4.6.0-1+nmu2
ii  libxml2             2.9.4+dfsg1-1+b1
ii  libyajl2            2.1.0-2

Versions of packages libvirt-daemon recommends:
ii  libxml2-utils   2.9.4+dfsg1-1+b1
ii  netcat-openbsd  1.105-7
ii  qemu-kvm        1:2.6+dfsg-3

Versions of packages libvirt-daemon suggests:
ii  libvirt-daemon-system  2.1.0-1

-- no debconf information