Provided by: lvm2_2.02.133-1ubuntu10_amd64 bug

NAME

       lvm2-activation-generator  -  generator  for  systemd units to activate
       LVM2 volumes on boot

SYNOPSIS

       /lib/systemd/system-generators/lvm2-activation-generator

DESCRIPTION

       The lvm2-activation-generator  is  called  by  systemd(1)  on  boot  to
       generate   systemd  units  at  runtime  to  activate  LVM2  volumes  if
       lvmetad(8) is  disabled  (global/use_lvmetad=0  lvm.conf(5)  option  is
       used).  Otherwise,  if  lvmetad(8)  is  enabled,  the  lvm2-activation-
       generator exits immediately without generating any  systemd  units  and
       LVM2  fully  relies  on  event-based  activation  to  activate the LVM2
       volumes instead using the pvscan(8) (pvscan --cache -aay) call that  is
       a part of udev(8) rules.

       These systemd units are generated by lvm2-activation-generator:

       lvm2-activation-early.service  used for activation of LVM2 volumes that
       is ordered before systemd's special cryptsetup.target to  support  LVM2
       volumes which are not layered on top of encrypted devices.

       lvm2-activation.service  used  for  activation  of LVM2 volumes that is
       ordered after  systemd's  special  cryptsetup.target  to  support  LVM2
       volumes which are layered on top of encrypted devices.

       lvm2-activation-net.service used for activation of LVM2 volumes that is
       ordered after systemd's special remote-fs-pre.target  to  support  LVM2
       volumes which are layered on attached remote devices.

       Note  that  all  the  underlying  devices (Physical Volumes) need to be
       present when the service is run. If the there are any devices presented
       in  the  system  anytime later, any LVM2 volumes on top of such devices
       need to be activated  directly  by  lvchange(8)  or  vgchange(8).  This
       limitation does not exist when using lvmetad(8) and accompanying event-
       based activation since such LVM volumes are activated automatically  as
       soon  as  the Volume Group is ready (all the Physical Volumes making up
       the Volume Group are present in the system).

       The lvm2-activation-generator implements the  Generators  Specification
       as referenced in systemd(1).

SEE ALSO

       lvm.conf(5)   vgchange(8)   lvchange(8)  lvmetad(8)  pvscan(8)  udev(7)
       systemd(1) systemd.target(5) systemd.special(7)

Red Hat, Inc          LVM TOOLS 2.02.133(2) (2015-LVM2-ACTIVATION-GENERATOR(8)