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, runtime=False):
  16     if runtime:
  17         process.run(['systemctl', 'enable', '--runtime', unit])
  18     else:
  19         process.run(['systemctl', 'enable', unit])
  20
  21
  22 def disable(unit):
  23     process.run(['systemctl', 'disable', unit])
  24
  25
  26 def mask(unit):
  27     process.run(['systemctl', 'mask', unit])
  28
  29
  30 def is_active(unit):
  31     out, err, rc = process.call(
  32         ['systemctl', 'is-active', unit],
  33         verbose_on_failure=False
  34     )
  35     return rc == 0
  36
  37
  38 def start_osd(id_):
  39     return start(osd_unit % id_)
  40
  41
  42 def stop_osd(id_):
  43     return stop(osd_unit % id_)
  44
  45
  46 def enable_osd(id_):
  47     return enable(osd_unit % id_, runtime=True)
  48
  49
  50 def disable_osd(id_):
  51     return disable(osd_unit % id_)
  52
  53
  54 def osd_is_active(id_):
  55     return is_active(osd_unit % id_)
  56
  57
  58 def enable_volume(id_, fsid, device_type='lvm'):
  59     return enable(volume_unit % (device_type, id_, fsid))
  60
  61
  62 def mask_ceph_disk():
  63     # systemctl allows using a glob like '*' for masking, but there was a bug
  64     # in that it wouldn't allow this for service templates. This means that
  65     # masking ceph-disk@* will not work, so we must link the service directly.
  66     # /etc/systemd takes precedence regardless of the location of the unit
  67     process.run(
  68         ['ln', '-sf', '/dev/null', '/etc/systemd/system/ceph-disk@.service']
  69     )
  70
  71
  72 #
  73 # templates
  74 #
  75
  76 osd_unit = "ceph-osd@%s"
  77 ceph_disk_unit = "ceph-disk@%s"
  78 volume_unit = "ceph-volume@%s-%s-%s"