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activate.py
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activate.py
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from __future__ import print_function
import argparse
import logging
import os
from textwrap import dedent
from ceph_volume import process, conf, decorators, terminal
from ceph_volume.util import system, disk
from ceph_volume.util import prepare as prepare_utils
from ceph_volume.util import encryption as encryption_utils
from ceph_volume.systemd import systemctl
from ceph_volume.api import lvm as api
logger = logging.getLogger(__name__)
def activate_filestore(lvs):
# find the osd
osd_lv = lvs.get(lv_tags={'ceph.type': 'data'})
if not osd_lv:
raise RuntimeError('Unable to find a data LV for filestore activation')
is_encrypted = osd_lv.tags.get('ceph.encrypted', '0') == '1'
osd_id = osd_lv.tags['ceph.osd_id']
conf.cluster = osd_lv.tags['ceph.cluster_name']
# it may have a volume with a journal
osd_journal_lv = lvs.get(lv_tags={'ceph.type': 'journal'})
# TODO: add sensible error reporting if this is ever the case
# blow up with a KeyError if this doesn't exist
osd_fsid = osd_lv.tags['ceph.osd_fsid']
if not osd_journal_lv:
# must be a disk partition, by quering blkid by the uuid we are ensuring that the
# device path is always correct
journal_uuid = osd_lv.tags['ceph.journal_uuid']
osd_journal = disk.get_device_from_partuuid(journal_uuid)
else:
journal_uuid = osd_journal_lv.lv_uuid
osd_journal = osd_lv.tags['ceph.journal_device']
if not osd_journal:
raise RuntimeError('unable to detect an lv or device journal for OSD %s' % osd_id)
# this is done here, so that previous checks that ensure path availability
# and correctness can still be enforced, and report if any issues are found
if is_encrypted:
lockbox_secret = osd_lv.tags['ceph.cephx_lockbox_secret']
# this keyring writing is idempotent
encryption_utils.write_lockbox_keyring(osd_id, osd_fsid, lockbox_secret)
dmcrypt_secret = encryption_utils.get_dmcrypt_key(osd_id, osd_fsid)
encryption_utils.luks_open(dmcrypt_secret, osd_lv.lv_path, osd_lv.lv_uuid)
encryption_utils.luks_open(dmcrypt_secret, osd_journal, journal_uuid)
osd_journal = '/dev/mapper/%s' % journal_uuid
source = '/dev/mapper/%s' % osd_lv.lv_uuid
else:
source = osd_lv.lv_path
# mount the osd
destination = '/var/lib/ceph/osd/%s-%s' % (conf.cluster, osd_id)
if not system.device_is_mounted(source, destination=destination):
process.run(['mount', '-v', source, destination])
# always re-do the symlink regardless if it exists, so that the journal
# device path that may have changed can be mapped correctly every time
destination = '/var/lib/ceph/osd/%s-%s/journal' % (conf.cluster, osd_id)
process.run(['ln', '-snf', osd_journal, destination])
# make sure that the journal has proper permissions
system.chown(osd_journal)
# enable the ceph-volume unit for this OSD
systemctl.enable_volume(osd_id, osd_fsid, 'lvm')
# start the OSD
systemctl.start_osd(osd_id)
terminal.success("ceph-volume lvm activate successful for osd ID: %s" % osd_id)
def get_osd_device_path(osd_lv, lvs, device_type, dmcrypt_secret=None):
"""
``device_type`` can be one of ``db``, ``wal`` or ``block`` so that
we can query ``lvs`` (a ``Volumes`` object) and fallback to querying the uuid
if that is not present.
Return a path if possible, failing to do that a ``None``, since some of these devices
are optional
"""
osd_lv = lvs.get(lv_tags={'ceph.type': 'block'})
is_encrypted = osd_lv.tags.get('ceph.encrypted', '0') == '1'
logger.debug('Found block device (%s) with encryption: %s', osd_lv.name, is_encrypted)
uuid_tag = 'ceph.%s_uuid' % device_type
device_uuid = osd_lv.tags.get(uuid_tag)
if not device_uuid:
return None
device_lv = lvs.get(lv_uuid=device_uuid)
if device_lv:
if is_encrypted:
encryption_utils.luks_open(dmcrypt_secret, device_lv.lv_path, device_uuid)
return '/dev/mapper/%s' % device_uuid
return device_lv.lv_path
else:
# this could be a regular device, so query it with blkid
physical_device = disk.get_device_from_partuuid(device_uuid)
if physical_device and is_encrypted:
encryption_utils.luks_open(dmcrypt_secret, physical_device, device_uuid)
return '/dev/mapper/%s' % device_uuid
return physical_device or None
return None
def activate_bluestore(lvs):
# find the osd
osd_lv = lvs.get(lv_tags={'ceph.type': 'block'})
is_encrypted = osd_lv.tags.get('ceph.encrypted', '0') == '1'
dmcrypt_secret = None
osd_id = osd_lv.tags['ceph.osd_id']
conf.cluster = osd_lv.tags['ceph.cluster_name']
osd_fsid = osd_lv.tags['ceph.osd_fsid']
# mount on tmpfs the osd directory
osd_path = '/var/lib/ceph/osd/%s-%s' % (conf.cluster, osd_id)
if not system.path_is_mounted(osd_path):
# mkdir -p and mount as tmpfs
prepare_utils.create_osd_path(osd_id, tmpfs=True)
# XXX This needs to be removed once ceph-bluestore-tool can deal with
# symlinks that exist in the osd dir
for link_name in ['block', 'block.db', 'block.wal']:
link_path = os.path.join(osd_path, link_name)
if os.path.exists(link_path):
os.unlink(os.path.join(osd_path, link_name))
# encryption is handled here, before priming the OSD dir
if is_encrypted:
osd_lv_path = '/dev/mapper/%s' % osd_lv.lv_uuid
lockbox_secret = osd_lv.tags['ceph.cephx_lockbox_secret']
encryption_utils.write_lockbox_keyring(osd_id, osd_fsid, lockbox_secret)
dmcrypt_secret = encryption_utils.get_dmcrypt_key(osd_id, osd_fsid)
encryption_utils.luks_open(dmcrypt_secret, osd_lv.lv_path, osd_lv.lv_uuid)
else:
osd_lv_path = osd_lv.lv_path
db_device_path = get_osd_device_path(osd_lv, lvs, 'db', dmcrypt_secret=dmcrypt_secret)
wal_device_path = get_osd_device_path(osd_lv, lvs, 'wal', dmcrypt_secret=dmcrypt_secret)
# Once symlinks are removed, the osd dir can be 'primed again.
process.run([
'ceph-bluestore-tool', '--cluster=%s' % conf.cluster,
'prime-osd-dir', '--dev', osd_lv_path,
'--path', osd_path])
# always re-do the symlink regardless if it exists, so that the block,
# block.wal, and block.db devices that may have changed can be mapped
# correctly every time
process.run(['ln', '-snf', osd_lv_path, os.path.join(osd_path, 'block')])
system.chown(os.path.join(osd_path, 'block'))
system.chown(osd_path)
if db_device_path:
destination = os.path.join(osd_path, 'block.db')
process.run(['ln', '-snf', db_device_path, destination])
system.chown(db_device_path)
if wal_device_path:
destination = os.path.join(osd_path, 'block.wal')
process.run(['ln', '-snf', wal_device_path, destination])
system.chown(wal_device_path)
# enable the ceph-volume unit for this OSD
systemctl.enable_volume(osd_id, osd_fsid, 'lvm')
# start the OSD
systemctl.start_osd(osd_id)
terminal.success("ceph-volume lvm activate successful for osd ID: %s" % osd_id)
class Activate(object):
help = 'Discover and mount the LVM device associated with an OSD ID and start the Ceph OSD'
def __init__(self, argv):
self.argv = argv
@decorators.needs_root
def activate(self, args):
lvs = api.Volumes()
# filter them down for the OSD ID and FSID we need to activate
if args.osd_id and args.osd_fsid:
lvs.filter(lv_tags={'ceph.osd_id': args.osd_id, 'ceph.osd_fsid': args.osd_fsid})
elif args.osd_fsid and not args.osd_id:
lvs.filter(lv_tags={'ceph.osd_fsid': args.osd_fsid})
if not lvs:
raise RuntimeError('could not find osd.%s with fsid %s' % (args.osd_id, args.osd_fsid))
# This argument is only available when passed in directly or via
# systemd, not when ``create`` is being used
if getattr(args, 'auto_detect_objectstore', False):
logger.info('auto detecting objectstore')
# may get multiple lvs, so can't do lvs.get() calls here
for lv in lvs:
has_journal = lv.tags.get('ceph.journal_uuid')
if has_journal:
logger.info('found a journal associated with the OSD, assuming filestore')
return activate_filestore(lvs)
logger.info('unable to find a journal associated with the OSD, assuming bluestore')
return activate_bluestore(lvs)
if args.bluestore:
activate_bluestore(lvs)
elif args.filestore:
activate_filestore(lvs)
def main(self):
sub_command_help = dedent("""
Activate OSDs by discovering them with LVM and mounting them in their
appropriate destination:
ceph-volume lvm activate {ID} {FSID}
The lvs associated with the OSD need to have been prepared previously,
so that all needed tags and metadata exist.
""")
parser = argparse.ArgumentParser(
prog='ceph-volume lvm activate',
formatter_class=argparse.RawDescriptionHelpFormatter,
description=sub_command_help,
)
parser.add_argument(
'osd_id',
metavar='ID',
nargs='?',
help='The ID of the OSD, usually an integer, like 0'
)
parser.add_argument(
'osd_fsid',
metavar='FSID',
nargs='?',
help='The FSID of the OSD, similar to a SHA1'
)
parser.add_argument(
'--auto-detect-objectstore',
action='store_true',
help='Autodetect the objectstore by inspecting the OSD',
)
parser.add_argument(
'--bluestore',
action='store_true',
help='bluestore objectstore (default)',
)
parser.add_argument(
'--filestore',
action='store_true',
help='filestore objectstore',
)
if len(self.argv) == 0:
print(sub_command_help)
return
args = parser.parse_args(self.argv)
# Default to bluestore here since defaulting it in add_argument may
# cause both to be True
if not args.bluestore and not args.filestore:
args.bluestore = True
self.activate(args)