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from __future__ import print_function
import json
import logging
import os
from textwrap import dedent
from ceph_volume.util import prepare as prepare_utils
from ceph_volume.util import encryption as encryption_utils
from ceph_volume.util import disk
from ceph_volume.util import system
from ceph_volume import decorators, terminal
from ceph_volume.devices.lvm.common import rollback_osd
from .common import create_parser
logger = logging.getLogger(__name__)
def prepare_dmcrypt(key, device, device_type, fsid):
"""
Helper for devices that are encrypted. The operations needed for
block, db, wal, or data/journal devices are all the same
"""
if not device:
return ''
kname = disk.lsblk(device)['KNAME']
mapping = 'ceph-{}-{}-{}-dmcrypt'.format(fsid, kname, device_type)
# format data device
encryption_utils.luks_format(
key,
device
)
encryption_utils.luks_open(
key,
device,
mapping
)
return '/dev/mapper/{}'.format(mapping)
def prepare_bluestore(block, wal, db, secrets, osd_id, fsid, tmpfs):
"""
:param block: The name of the logical volume for the bluestore data
:param wal: a regular/plain disk or logical volume, to be used for block.wal
:param db: a regular/plain disk or logical volume, to be used for block.db
:param secrets: A dict with the secrets needed to create the osd (e.g. cephx)
:param id_: The OSD id
:param fsid: The OSD fsid, also known as the OSD UUID
"""
cephx_secret = secrets.get('cephx_secret', prepare_utils.create_key())
if secrets.get('dmcrypt_key'):
key = secrets['dmcrypt_key']
block = prepare_dmcrypt(key, block, 'block', fsid)
wal = prepare_dmcrypt(key, wal, 'wal', fsid)
db = prepare_dmcrypt(key, db, 'db', fsid)
# create the directory
prepare_utils.create_osd_path(osd_id, tmpfs=tmpfs)
# symlink the block
prepare_utils.link_block(block, osd_id)
# get the latest monmap
prepare_utils.get_monmap(osd_id)
# write the OSD keyring if it doesn't exist already
prepare_utils.write_keyring(osd_id, cephx_secret)
# prepare the osd filesystem
prepare_utils.osd_mkfs_bluestore(
osd_id, fsid,
keyring=cephx_secret,
wal=wal,
db=db
)
class Prepare(object):
help = 'Format a raw device and associate it with a (BlueStore) OSD'
def __init__(self, argv):
self.argv = argv
self.osd_id = None
def safe_prepare(self, args=None):
"""
An intermediate step between `main()` and `prepare()` so that we can
capture the `self.osd_id` in case we need to rollback
:param args: Injected args, usually from `raw create` which compounds
both `prepare` and `create`
"""
if args is not None:
self.args = args
try:
self.prepare()
except Exception:
logger.exception('raw prepare was unable to complete')
logger.info('will rollback OSD ID creation')
rollback_osd(self.args, self.osd_id)
raise
dmcrypt_log = 'dmcrypt' if args.dmcrypt else 'clear'
terminal.success("ceph-volume raw {} prepare successful for: {}".format(dmcrypt_log, self.args.data))
@decorators.needs_root
def prepare(self):
secrets = {'cephx_secret': prepare_utils.create_key()}
encrypted = 1 if self.args.dmcrypt else 0
cephx_lockbox_secret = '' if not encrypted else prepare_utils.create_key()
if encrypted:
secrets['dmcrypt_key'] = os.getenv('CEPH_VOLUME_DMCRYPT_SECRET')
secrets['cephx_lockbox_secret'] = cephx_lockbox_secret # dummy value to make `ceph osd new` not complaining
osd_fsid = system.generate_uuid()
crush_device_class = self.args.crush_device_class
if crush_device_class:
secrets['crush_device_class'] = crush_device_class
tmpfs = not self.args.no_tmpfs
wal = ""
db = ""
if self.args.block_wal:
wal = self.args.block_wal
if self.args.block_db:
db = self.args.block_db
# reuse a given ID if it exists, otherwise create a new ID
self.osd_id = prepare_utils.create_id(
osd_fsid, json.dumps(secrets))
prepare_bluestore(
self.args.data,
wal,
db,
secrets,
self.osd_id,
osd_fsid,
tmpfs,
)
def main(self):
sub_command_help = dedent("""
Prepare an OSD by assigning an ID and FSID, registering them with the
cluster with an ID and FSID, formatting the volume.
Once the OSD is ready, an ad-hoc systemd unit will be enabled so that
it can later get activated and the OSD daemon can get started.
ceph-volume raw prepare --bluestore --data {device}
DB and WAL devices are supported.
ceph-volume raw prepare --bluestore --data {device} --block.db {device} --block.wal {device}
""")
parser = create_parser(
prog='ceph-volume raw prepare',
description=sub_command_help,
)
if not self.argv:
print(sub_command_help)
return
self.args = parser.parse_args(self.argv)
if not self.args.bluestore:
terminal.error('must specify --bluestore (currently the only supported backend)')
raise SystemExit(1)
if self.args.dmcrypt and not os.getenv('CEPH_VOLUME_DMCRYPT_SECRET'):
terminal.error('encryption was requested (--dmcrypt) but environment variable ' \
'CEPH_VOLUME_DMCRYPT_SECRET is not set, you must set ' \
'this variable to provide a dmcrypt secret.')
raise SystemExit(1)
self.safe_prepare(self.args)
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