openstack/charm-cinder-ceph
Code Issues Proposed changes

Request Ceph application name `rbd` for pools we create.

Browse Source 
Use cases for the Ceph pool application name tagging is emerging
and thus far the protocol appears to be ``rbd`` or ``rgw``.  Others
might emerge too.

We make use of this to provide "it just works" behaviour to the
ongoing ``rbd-mirror`` feature work in the Ceph charms.

Sync charm-helpers.

Change-Id: Id8e59abdf5aaf578e9f11a223a79209fa971f51c
This commit is contained in:
Frode Nordahl 2019-02-19 19:22:05 +01:00
parent 42de983c5a
commit 00b069df3f
3 changed files with 59 additions and 45 deletions
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87
charmhelpers/contrib/storage/linux/ceph.py
View File

@ -59,6 +59,7 @@ from charmhelpers.core.host import (
service_stop,
service_running,
umount,
cmp_pkgrevno,
)
from charmhelpers.fetch import (
apt_install,
@ -178,7 +179,6 @@ class Pool(object):
"""
# read-only is easy, writeback is much harder
mode = get_cache_mode(self.service, cache_pool)
version = ceph_version()
if mode == 'readonly':
check_call(['ceph', '--id', self.service, 'osd', 'tier', 'cache-mode', cache_pool, 'none'])
check_call(['ceph', '--id', self.service, 'osd', 'tier', 'remove', self.name, cache_pool])
@ -186,7 +186,7 @@ class Pool(object):
elif mode == 'writeback':
pool_forward_cmd = ['ceph', '--id', self.service, 'osd', 'tier',
'cache-mode', cache_pool, 'forward']
if version >= '10.1':
if cmp_pkgrevno('ceph', '10.1') >= 0:
# Jewel added a mandatory flag
pool_forward_cmd.append('--yes-i-really-mean-it')
@ -196,7 +196,8 @@ class Pool(object):
check_call(['ceph', '--id', self.service, 'osd', 'tier', 'remove-overlay', self.name])
check_call(['ceph', '--id', self.service, 'osd', 'tier', 'remove', self.name, cache_pool])
def get_pgs(self, pool_size, percent_data=DEFAULT_POOL_WEIGHT):
def get_pgs(self, pool_size, percent_data=DEFAULT_POOL_WEIGHT,
device_class=None):
"""Return the number of placement groups to use when creating the pool.
Returns the number of placement groups which should be specified when
@ -229,6 +230,9 @@ class Pool(object):
increased. NOTE: the default is primarily to handle the scenario
where related charms requiring pools has not been upgraded to
include an update to indicate their relative usage of the pools.
:param device_class: str. class of storage to use for basis of pgs
calculation; ceph supports nvme, ssd and hdd by default based
on presence of devices of each type in the deployment.
:return: int. The number of pgs to use.
"""
@ -243,17 +247,20 @@ class Pool(object):
# If the expected-osd-count is specified, then use the max between
# the expected-osd-count and the actual osd_count
osd_list = get_osds(self.service)
osd_list = get_osds(self.service, device_class)
expected = config('expected-osd-count') or 0
if osd_list:
osd_count = max(expected, len(osd_list))
if device_class:
osd_count = len(osd_list)
else:
osd_count = max(expected, len(osd_list))
# Log a message to provide some insight if the calculations claim
# to be off because someone is setting the expected count and
# there are more OSDs in reality. Try to make a proper guess
# based upon the cluster itself.
if expected and osd_count != expected:
if not device_class and expected and osd_count != expected:
log("Found more OSDs than provided expected count. "
"Using the actual count instead", INFO)
elif expected:
@ -626,7 +633,8 @@ def remove_erasure_profile(service, profile_name):
def create_erasure_profile(service, profile_name, erasure_plugin_name='jerasure',
failure_domain='host',
data_chunks=2, coding_chunks=1,
locality=None, durability_estimator=None):
locality=None, durability_estimator=None,
device_class=None):
"""
Create a new erasure code profile if one does not already exist for it. Updates
the profile if it exists. Please see http://docs.ceph.com/docs/master/rados/operations/erasure-code-profile/
@ -640,10 +648,9 @@ def create_erasure_profile(service, profile_name, erasure_plugin_name='jerasure'
:param coding_chunks: int
:param locality: int
:param durability_estimator: int
:param device_class: six.string_types
:return: None. Can raise CalledProcessError
"""
version = ceph_version()
# Ensure this failure_domain is allowed by Ceph
validator(failure_domain, six.string_types,
['chassis', 'datacenter', 'host', 'osd', 'pdu', 'pod', 'rack', 'region', 'room', 'root', 'row'])
@ -654,12 +661,20 @@ def create_erasure_profile(service, profile_name, erasure_plugin_name='jerasure'
if locality is not None and durability_estimator is not None:
raise ValueError("create_erasure_profile should be called with k, m and one of l or c but not both.")
luminous_or_later = cmp_pkgrevno('ceph', '12.0.0') >= 0
# failure_domain changed in luminous
if version and version >= '12.0.0':
if luminous_or_later:
cmd.append('crush-failure-domain=' + failure_domain)
else:
cmd.append('ruleset-failure-domain=' + failure_domain)
# device class new in luminous
if luminous_or_later and device_class:
cmd.append('crush-device-class={}'.format(device_class))
else:
log('Skipping device class configuration (ceph < 12.0.0)',
level=DEBUG)
# Add plugin specific information
if locality is not None:
# For local erasure codes
@ -744,20 +759,26 @@ def pool_exists(service, name):
return name in out.split()
def get_osds(service):
def get_osds(service, device_class=None):
"""Return a list of all Ceph Object Storage Daemons currently in the
cluster.
cluster (optionally filtered by storage device class).
:param device_class: Class of storage device for OSD's
:type device_class: str
"""
version = ceph_version()
if version and version >= '0.56':
luminous_or_later = cmp_pkgrevno('ceph', '12.0.0') >= 0
if luminous_or_later and device_class:
out = check_output(['ceph', '--id', service,
'osd', 'crush', 'class',
'ls-osd', device_class,
'--format=json'])
else:
out = check_output(['ceph', '--id', service,
'osd', 'ls',
'--format=json'])
if six.PY3:
out = out.decode('UTF-8')
return json.loads(out)
return None
if six.PY3:
out = out.decode('UTF-8')
return json.loads(out)
def install():
@ -811,7 +832,7 @@ def set_app_name_for_pool(client, pool, name):
:raises: CalledProcessError if ceph call fails
"""
if ceph_version() >= '12.0.0':
if cmp_pkgrevno('ceph', '12.0.0') >= 0:
cmd = ['ceph', '--id', client, 'osd', 'pool',
'application', 'enable', pool, name]
check_call(cmd)
@ -1091,22 +1112,6 @@ def ensure_ceph_keyring(service, user=None, group=None,
return True
def ceph_version():
"""Retrieve the local version of ceph."""
if os.path.exists('/usr/bin/ceph'):
cmd = ['ceph', '-v']
output = check_output(cmd)
if six.PY3:
output = output.decode('UTF-8')
output = output.split()
if len(output) > 3:
return output[2]
else:
return None
else:
return None
class CephBrokerRq(object):
"""Ceph broker request.
@ -1147,7 +1152,8 @@ class CephBrokerRq(object):
'object-prefix-permissions': object_prefix_permissions})
def add_op_create_pool(self, name, replica_count=3, pg_num=None,
weight=None, group=None, namespace=None):
weight=None, group=None, namespace=None,
app_name=None):
"""Adds an operation to create a pool.
@param pg_num setting: optional setting. If not provided, this value
@ -1155,6 +1161,11 @@ class CephBrokerRq(object):
cluster at the time of creation. Note that, if provided, this value
will be capped at the current available maximum.
@param weight: the percentage of data the pool makes up
:param app_name: (Optional) Tag pool with application name. Note that
there is certain protocols emerging upstream with
regard to meaningful application names to use.
Examples are ``rbd`` and ``rgw``.
:type app_name: str
"""
if pg_num and weight:
raise ValueError('pg_num and weight are mutually exclusive')
@ -1162,7 +1173,7 @@ class CephBrokerRq(object):
self.ops.append({'op': 'create-pool', 'name': name,
'replicas': replica_count, 'pg_num': pg_num,
'weight': weight, 'group': group,
'group-namespace': namespace})
'group-namespace': namespace, 'app-name': app_name})
def set_ops(self, ops):
"""Set request ops to provided value.

8
hooks/cinder_hooks.py
View File

@ -111,18 +111,18 @@ def get_ceph_request():
pool_name = config('rbd-pool-name') or service
rq.add_op_create_pool(name=pool_name, replica_count=replicas,
weight=weight,
group="volumes")
group='volumes', app_name='rbd')
if config('restrict-ceph-pools'):
rq.add_op_request_access_to_group(
name="volumes",
name='volumes',
object_prefix_permissions={'class-read': ['rbd_children']},
permission='rwx')
rq.add_op_request_access_to_group(
name="images",
name='images',
object_prefix_permissions={'class-read': ['rbd_children']},
permission='rwx')
rq.add_op_request_access_to_group(
name="vms",
name='vms',
object_prefix_permissions={'class-read': ['rbd_children']},
permission='rwx')
return rq

9
unit_tests/test_cinder_hooks.py
View File

@ -129,13 +129,15 @@ class TestCinderHooks(CharmTestCase):
self.test_config.set('ceph-pool-weight', 20)
hooks.get_ceph_request()
mock_create_pool.assert_called_with(name='cinder', replica_count=4,
weight=20, group='volumes')
weight=20, group='volumes',
app_name='rbd')
mock_request_access.assert_not_called()
self.test_config.set('restrict-ceph-pools', True)
hooks.get_ceph_request()
mock_create_pool.assert_called_with(name='cinder', replica_count=4,
weight=20, group='volumes')
weight=20, group='volumes',
app_name='rbd')
mock_request_access.assert_has_calls([
call(
name='volumes',
@ -165,7 +167,8 @@ class TestCinderHooks(CharmTestCase):
mock_create_pool.assert_called_with(name='cinder-test',
replica_count=4,
weight=20,
group='volumes')
group='volumes',
app_name='rbd')
@patch('charmhelpers.core.hookenv.config')
def test_ceph_changed_no_keys(self, mock_config):