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libvirtd: systemd: add special target for system shutdown

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It is already discussed in "[RFC] daemon: remove hardcode dep on libvirt-guests" [1].

Mgmt can use means to save/restore domains on system shutdown/boot other than
libvirt-guests.service. Thus we need to specify appropriate ordering dependency between
libvirtd, domains and save/restore service. This patch takes approach suggested
in RFC and introduces a systemd target, so that ordering can be built next way:

libvirtd -> domain -> virt-guest-shutdown.target -> save-restore.service.

This way domains are decoupled from specific shutdown service via intermediate
target.

[1] https://www.redhat.com/archives/libvir-list/2016-September/msg01353.html
This commit is contained in:
Nikolay Shirokovskiy
2016-10-14 10:13:48 +03:00
committed by Maxim Nestratov
parent 29dc9a52d7
commit 01079727fe
5 changed files with 12 additions and 2 deletions
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2
tools/libvirt-guests.service.in
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@@ -1,9 +1,11 @@
[Unit]
Description=Suspend/Resume Running libvirt Guests
Wants=libvirtd.service
Requires=virt-guest-shutdown.target
After=network.target
After=time-sync.target
After=libvirtd.service
After=virt-guest-shutdown.target
Documentation=man:libvirtd(8)
Documentation=http://libvirt.org