ceph/src/ceph-volume/ceph_volume/systemd/systemctl.py

   1 """
   2 Utilities to control systemd units
   3 """
   4 from ceph_volume import process
   5
   6
   7 def start(unit):
   8     process.run(['systemctl', 'start', unit])
   9
  10
  11 def stop(unit):
  12     process.run(['systemctl', 'stop', unit])
  13
  14
  15 def enable(unit):
  16     process.run(['systemctl', 'enable', unit])
  17
  18
  19 def disable(unit):
  20     process.run(['systemctl', 'disable', unit])
  21
  22
  23 def mask(unit):
  24     process.run(['systemctl', 'mask', unit])
  25
  26
  27 def start_osd(id_):
  28     return start(osd_unit % id_)
  29
  30
  31 def stop_osd(id_):
  32     return stop(osd_unit % id_)
  33
  34
  35 def enable_osd(id_):
  36     return enable(osd_unit % id_)
  37
  38
  39 def disable_osd(id_):
  40     return disable(osd_unit % id_)
  41
  42
  43 def enable_volume(id_, fsid, device_type='lvm'):
  44     return enable(volume_unit % (device_type, id_, fsid))
  45
  46
  47 def mask_ceph_disk():
  48     # systemctl allows using a glob like '*' for masking, but there was a bug
  49     # in that it wouldn't allow this for service templates. This means that
  50     # masking ceph-disk@* will not work, so we must link the service directly.
  51     # /etc/systemd takes precendence regardless of the location of the unit
  52     process.run(
  53         ['ln', '-sf', '/dev/null', '/etc/systemd/system/ceph-disk@.service']
  54     )
  55
  56
  57 #
  58 # templates
  59 #
  60
  61 osd_unit = "ceph-osd@%s"
  62 ceph_disk_unit = "ceph-disk@%s"
  63 volume_unit = "ceph-volume@%s-%s-%s"