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f3c1ce4d35
Add two new fixed activation services for startup: lvm-activate-vgs-main and lvm-activate-vgs-last. The -main service runs early, without service dependencies. The -last service runs later, after other services have started (other services that may set up devices for PVs, like mulitpathd.) The lvm-activate-vgs services both run "vgchange -aay" to activate all VGs that are preset and complete at the time of system startup. When there are many VGs, these two vgchange commands will replace many per-VG vgchange commands. The last service enables event activation by creating the file /run/lvm/event-activation-on. After that, new devices that appear will be processed by event based autoactivation commands. Prior to the existence of the event-activation-on file, event-based commands do nothing. lvm.conf event_activation_options can be used to configure service-based activation only, or event-based activation only, or the approach described above which begins with service based activation and then switches to event-based. service_only: only the -main and -last services will activate VGs. VGs on devices that appear later will not be autoactivated. event_only: the -main and -last services will not activate any VGs, and all VGs will be activated from per-VG event-based activation commands. service_to_event: the -main and -last services will activate VGs that are complete at the time the services run, and VGs that appear later will be activated from per-VG event-based activation commands.
20 lines
544 B
SYSTEMD
20 lines
544 B
SYSTEMD
[Unit]
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Description=Activate LVM Volume Groups
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Documentation=man:vgchange(8)
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After=dm-event.socket dm-event.service
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Before=local-fs-pre.target shutdown.target
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DefaultDependencies=no
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Conflicts=shutdown.target
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# "--eventactivation service" tells vgchange it is being called
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# from an activation service, so it will do nothing if
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# lvm.conf event_activation_options = "event_only".
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[Service]
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Type=oneshot
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ExecStart=@SBINDIR@/lvm vgchange -aay --nohints --vgonline --eventactivation service
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RemainAfterExit=yes
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[Install]
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WantedBy=sysinit.target
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