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50 lines
1.8 KiB
Plaintext
50 lines
1.8 KiB
Plaintext
.TH "LVM2-ACTIVATION-GENERATOR" "8" "LVM TOOLS #VERSION#" "Red Hat, Inc" "\""
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.SH "NAME"
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lvm2-activation-generator - generator for systemd units to activate LVM volumes on boot
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.SH SYNOPSIS
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.B #SYSTEMD_GENERATOR_DIR#/lvm2-activation-generator
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.sp
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.SH DESCRIPTION
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The lvm2-activation-generator is called by \fBsystemd\fP(1) on boot to
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generate systemd units at runtime to activate LVM Logical Volumes (LVs)
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when global/use_lvmetad=0 is set in \fBlvm.conf\fP(5). These units use
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\fBvgchange -ay\fP to activate LVs.
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If use_lvmetad=1, the lvm2-activation-generator exits immediately without
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generating any systemd units, and LVM fully relies on event-based
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activation to activate LVs. In this case, event-generated \fBpvscan
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--cache -aay\fP commands activate LVs.
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These systemd units are generated by lvm2-activation-generator:
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.sp
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\fIlvm2-activation-early.service\fP
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is run before systemd's special \fBcryptsetup.target\fP to activate
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LVs that are not layered on top of encrypted devices.
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\fIlvm2-activation.service\fP
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is run after systemd's special \fBcryptsetup.target\fP to activate
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LVs that are layered on top of encrypted devices.
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\fIlvm2-activation-net.service\fP
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is run after systemd's special \fBremote-fs-pre.target\fP to activate
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LVs that are layered on attached remote devices.
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Note that all the underlying LVM devices (Physical Volumes) need to be
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present when the service is run. If the there are any devices that appear
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to the system later, LVs using these devices need to be activated directly
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by \fBlvchange\fP(8) or \fBvgchange\fP(8).
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The lvm2-activation-generator implements the \fBGenerators Specification\fP
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as referenced in \fBsystemd\fP(1).
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.sp
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.SH SEE ALSO
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.BR lvm.conf (5)
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.BR vgchange (8)
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.BR lvchange (8)
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.BR pvscan (8)
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.BR udev (7)
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.BR systemd (1)
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.BR systemd.target (5)
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.BR systemd.special (7)
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