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