ceph-ansible/library/ceph_pool.py

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# Copyright 2020, Red Hat, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from __future__ import absolute_import, division, print_function
__metaclass__ = type
from ansible.module_utils.basic import AnsibleModule
try:
from ansible.module_utils.ca_common import generate_cmd, \
pre_generate_cmd, \
is_containerized, \
exec_command, \
exit_module
except ImportError:
from module_utils.ca_common import generate_cmd, \
pre_generate_cmd, \
is_containerized, \
exec_command, \
exit_module
import datetime
import json
import os
ANSIBLE_METADATA = {
'metadata_version': '1.1',
'status': ['preview'],
'supported_by': 'community'
}
DOCUMENTATION = '''
---
module: ceph_pool
author: Guillaume Abrioux <gabrioux@redhat.com>
short_description: Manage Ceph Pools
version_added: "2.8"
description:
- Manage Ceph pool(s) creation, deletion and updates.
options:
cluster:
description:
- The ceph cluster name.
required: false
default: ceph
name:
description:
- name of the Ceph pool
required: true
state:
description:
If 'present' is used, the module creates a pool if it doesn't exist
or update it if it already exists.
If 'absent' is used, the module will simply delete the pool.
If 'list' is used, the module will return all details about the
existing pools. (json formatted).
required: false
choices: ['present', 'absent', 'list']
default: present
size:
description:
- set the replica size of the pool.
required: false
default: 3
min_size:
description:
- set the min_size parameter of the pool.
required: false
default: default to `osd_pool_default_min_size` (ceph)
pg_num:
description:
- set the pg_num of the pool.
required: false
default: default to `osd_pool_default_pg_num` (ceph)
pgp_num:
description:
- set the pgp_num of the pool.
required: false
default: default to `osd_pool_default_pgp_num` (ceph)
pg_autoscale_mode:
description:
- set the pg autoscaler on the pool.
required: false
default: 'on'
target_size_ratio:
description:
- set the target_size_ratio on the pool
required: false
default: None
pool_type:
description:
- set the pool type, either 'replicated' or 'erasure'
required: false
default: 'replicated'
erasure_profile:
description:
- When pool_type = 'erasure', set the erasure profile of the pool
required: false
default: 'default'
rule_name:
description:
- Set the crush rule name assigned to the pool
required: false
default: 'replicated_rule' when pool_type is 'erasure' else None
expected_num_objects:
description:
- Set the expected_num_objects parameter of the pool.
required: false
default: '0'
application:
description:
- Set the pool application on the pool.
required: false
default: None
'''
EXAMPLES = '''
pools:
- { name: foo, size: 3, application: rbd, pool_type: 'replicated',
pg_autoscale_mode: 'on' }
- hosts: all
become: true
tasks:
- name: create a pool
ceph_pool:
name: "{{ item.name }}"
state: present
size: "{{ item.size }}"
application: "{{ item.application }}"
pool_type: "{{ item.pool_type }}"
pg_autoscale_mode: "{{ item.pg_autoscale_mode }}"
with_items: "{{ pools }}"
'''
RETURN = '''# '''
def check_pool_exist(cluster,
name,
user,
user_key,
output_format='json',
container_image=None):
'''
Check if a given pool exists
'''
args = ['stats', name, '-f', output_format]
cmd = generate_cmd(sub_cmd=['osd', 'pool'],
args=args,
cluster=cluster,
user=user,
user_key=user_key,
container_image=container_image)
return cmd
def generate_get_config_cmd(param,
cluster,
user,
user_key,
container_image=None):
_cmd = pre_generate_cmd('ceph', container_image=container_image)
args = [
'-n',
user,
'-k',
user_key,
'--cluster',
cluster,
'config',
'get',
'mon.*',
param
]
cmd = _cmd + args
return cmd
def get_application_pool(cluster,
name,
user,
user_key,
output_format='json',
container_image=None):
'''
Get application type enabled on a given pool
'''
args = ['application', 'get', name, '-f', output_format]
cmd = generate_cmd(sub_cmd=['osd', 'pool'],
args=args,
cluster=cluster,
user=user,
user_key=user_key,
container_image=container_image)
return cmd
def enable_application_pool(cluster,
name,
application,
user,
user_key,
container_image=None):
'''
Enable application on a given pool
'''
args = ['application', 'enable', name, application]
cmd = generate_cmd(sub_cmd=['osd', 'pool'],
args=args,
cluster=cluster,
user=user,
user_key=user_key,
container_image=container_image)
return cmd
def init_rbd_pool(cluster,
name,
user,
user_key,
container_image=None):
'''
Initialize a rbd pool
'''
args = [name]
cmd = generate_cmd(cmd='rbd',
sub_cmd=['pool', 'init'],
args=args,
cluster=cluster,
user=user,
user_key=user_key,
container_image=container_image)
return cmd
def disable_application_pool(cluster,
name,
application,
user,
user_key,
container_image=None):
'''
Disable application on a given pool
'''
args = ['application', 'disable', name,
application, '--yes-i-really-mean-it']
cmd = generate_cmd(sub_cmd=['osd', 'pool'],
args=args,
cluster=cluster,
user=user,
user_key=user_key,
container_image=container_image)
return cmd
def get_pool_details(module,
cluster,
name,
user,
user_key,
output_format='json',
container_image=None):
'''
Get details about a given pool
'''
args = ['ls', 'detail', '-f', output_format]
cmd = generate_cmd(sub_cmd=['osd', 'pool'],
args=args,
cluster=cluster,
user=user,
user_key=user_key,
container_image=container_image)
rc, cmd, out, err = exec_command(module, cmd)
if rc == 0:
out = [p for p in json.loads(out.strip()) if p['pool_name'] == name][0]
_rc, _cmd, application_pool, _err = exec_command(module,
get_application_pool(cluster, # noqa: E501
name, # noqa: E501
user, # noqa: E501
user_key, # noqa: E501
container_image=container_image)) # noqa: E501
# This is a trick because "target_size_ratio" isn't present at the same
# level in the dict
# ie:
# {
# 'pg_num': 8,
# 'pgp_num': 8,
# 'pg_autoscale_mode': 'on',
# 'options': {
# 'target_size_ratio': 0.1
# }
# }
# If 'target_size_ratio' is present in 'options', we set it, this way we
# end up with a dict containing all needed keys at the same level.
if 'target_size_ratio' in out['options'].keys():
out['target_size_ratio'] = out['options']['target_size_ratio']
else:
out['target_size_ratio'] = None
application = list(json.loads(application_pool.strip()).keys())
if len(application) == 0:
out['application'] = ''
else:
out['application'] = application[0]
return rc, cmd, out, err
def compare_pool_config(user_pool_config, running_pool_details):
'''
Compare user input config pool details with current running pool details
'''
delta = {}
filter_keys = ['pg_num', 'pg_placement_num', 'size',
'pg_autoscale_mode', 'target_size_ratio']
for key in filter_keys:
if (str(running_pool_details[key]) != user_pool_config[key]['value'] and # noqa: E501
user_pool_config[key]['value']):
delta[key] = user_pool_config[key]
if (running_pool_details['application'] !=
user_pool_config['application']['value'] and
user_pool_config['application']['value']):
delta['application'] = {}
delta['application']['new_application'] = user_pool_config['application']['value'] # noqa: E501
# to be improved (for update_pools()...)
delta['application']['value'] = delta['application']['new_application']
delta['application']['old_application'] = running_pool_details['application'] # noqa: E501
return delta
def list_pools(cluster,
user,
user_key,
details,
output_format='json',
container_image=None):
'''
List existing pools
'''
args = ['ls']
if details:
args.append('detail')
args.extend(['-f', output_format])
cmd = generate_cmd(sub_cmd=['osd', 'pool'],
args=args,
cluster=cluster,
user=user,
user_key=user_key,
container_image=container_image)
return cmd
def create_pool(cluster,
user,
user_key,
user_pool_config,
container_image=None):
'''
Create a new pool
'''
args = ['create', user_pool_config['pool_name']['value'],
user_pool_config['type']['value']]
if user_pool_config['pg_autoscale_mode']['value'] == 'off':
args.extend(['--pg_num',
user_pool_config['pg_num']['value'],
'--pgp_num',
user_pool_config['pgp_num']['value'] or
user_pool_config['pg_num']['value']])
elif user_pool_config['target_size_ratio']['value']:
args.extend(['--target_size_ratio',
user_pool_config['target_size_ratio']['value']])
if user_pool_config['type']['value'] == 'replicated':
args.extend([user_pool_config['crush_rule']['value'],
'--expected_num_objects',
user_pool_config['expected_num_objects']['value'],
'--autoscale-mode',
user_pool_config['pg_autoscale_mode']['value']])
if (user_pool_config['size']['value'] and
user_pool_config['type']['value'] == "replicated"):
args.extend(['--size', user_pool_config['size']['value']])
elif user_pool_config['type']['value'] == 'erasure':
args.extend([user_pool_config['erasure_profile']['value']])
if user_pool_config['crush_rule']['value']:
args.extend([user_pool_config['crush_rule']['value']])
args.extend(['--expected_num_objects',
user_pool_config['expected_num_objects']['value'],
'--autoscale-mode',
user_pool_config['pg_autoscale_mode']['value']])
cmd = generate_cmd(sub_cmd=['osd', 'pool'],
args=args,
cluster=cluster,
user=user,
user_key=user_key,
container_image=container_image)
return cmd
def remove_pool(cluster, name, user, user_key, container_image=None):
'''
Remove a pool
'''
args = ['rm', name, name, '--yes-i-really-really-mean-it']
cmd = generate_cmd(sub_cmd=['osd', 'pool'],
args=args,
cluster=cluster,
user=user,
user_key=user_key,
container_image=container_image)
return cmd
def update_pool(module, cluster, name,
user, user_key, delta, container_image=None):
'''
Update an existing pool
'''
report = ""
for key in delta.keys():
if key != 'application':
args = ['set',
name,
delta[key]['cli_set_opt'],
delta[key]['value']]
cmd = generate_cmd(sub_cmd=['osd', 'pool'],
args=args,
cluster=cluster,
user=user,
user_key=user_key,
container_image=container_image)
rc, cmd, out, err = exec_command(module, cmd)
if rc != 0:
return rc, cmd, out, err
else:
rc, cmd, out, err = exec_command(module, disable_application_pool(cluster, name, delta['application']['old_application'], user, user_key, container_image=container_image)) # noqa: E501
if rc != 0:
return rc, cmd, out, err
rc, cmd, out, err = exec_command(module, enable_application_pool(cluster, name, delta['application']['new_application'], user, user_key, container_image=container_image)) # noqa: E501
if rc != 0:
return rc, cmd, out, err
report = report + "\n" + "{} has been updated: {} is now {}".format(name, key, delta[key]['value']) # noqa: E501
out = report
return rc, cmd, out, err
def run_module():
module_args = dict(
cluster=dict(type='str', required=False, default='ceph'),
name=dict(type='str', required=True),
state=dict(type='str', required=False, default='present',
choices=['present', 'absent', 'list']),
details=dict(type='bool', required=False, default=False),
size=dict(type='str', required=False),
min_size=dict(type='str', required=False),
pg_num=dict(type='str', required=False),
pgp_num=dict(type='str', required=False),
pg_autoscale_mode=dict(type='str', required=False, default='on'),
target_size_ratio=dict(type='str', required=False, default=None),
pool_type=dict(type='str', required=False, default='replicated',
choices=['replicated', 'erasure', '1', '3']),
erasure_profile=dict(type='str', required=False, default='default'),
rule_name=dict(type='str', required=False, default=None),
expected_num_objects=dict(type='str', required=False, default="0"),
application=dict(type='str', required=False, default=None),
)
module = AnsibleModule(
argument_spec=module_args,
supports_check_mode=True
)
# Gather module parameters in variables
cluster = module.params.get('cluster')
name = module.params.get('name')
state = module.params.get('state')
details = module.params.get('details')
size = module.params.get('size')
min_size = module.params.get('min_size')
pg_num = module.params.get('pg_num')
pgp_num = module.params.get('pgp_num')
pg_autoscale_mode = module.params.get('pg_autoscale_mode')
target_size_ratio = module.params.get('target_size_ratio')
application = module.params.get('application')
if (module.params.get('pg_autoscale_mode').lower() in
['true', 'on', 'yes']):
pg_autoscale_mode = 'on'
elif (module.params.get('pg_autoscale_mode').lower() in
['false', 'off', 'no']):
pg_autoscale_mode = 'off'
else:
pg_autoscale_mode = 'warn'
if module.params.get('pool_type') == '1':
pool_type = 'replicated'
elif module.params.get('pool_type') == '3':
pool_type = 'erasure'
else:
pool_type = module.params.get('pool_type')
if not module.params.get('rule_name'):
rule_name = 'replicated_rule' if pool_type == 'replicated' else None
else:
rule_name = module.params.get('rule_name')
erasure_profile = module.params.get('erasure_profile')
expected_num_objects = module.params.get('expected_num_objects')
user_pool_config = {
'pool_name': {'value': name},
'pg_num': {'value': pg_num, 'cli_set_opt': 'pg_num'},
'pgp_num': {'value': pgp_num, 'cli_set_opt': 'pgp_num'},
'pg_autoscale_mode': {'value': pg_autoscale_mode,
'cli_set_opt': 'pg_autoscale_mode'},
'target_size_ratio': {'value': target_size_ratio,
'cli_set_opt': 'target_size_ratio'},
'application': {'value': application},
'type': {'value': pool_type},
'erasure_profile': {'value': erasure_profile},
'crush_rule': {'value': rule_name, 'cli_set_opt': 'crush_rule'},
'expected_num_objects': {'value': expected_num_objects},
'size': {'value': size, 'cli_set_opt': 'size'},
'min_size': {'value': min_size}
}
startd = datetime.datetime.now()
changed = False
# will return either the image name or None
container_image = is_containerized()
user = "client.admin"
keyring_filename = cluster + '.' + user + '.keyring'
user_key = os.path.join("/etc/ceph/", keyring_filename)
if state == "present":
rc, cmd, out, err = exec_command(module,
check_pool_exist(cluster,
name,
user,
user_key,
container_image=container_image)) # noqa: E501
changed = rc != 0
if not changed:
running_pool_details = get_pool_details(module,
cluster,
name,
user,
user_key,
container_image=container_image) # noqa: E501
user_pool_config['pg_placement_num'] = {'value': str(running_pool_details[2]['pg_placement_num']), 'cli_set_opt': 'pgp_num'} # noqa: E501
delta = compare_pool_config(user_pool_config,
running_pool_details[2])
if len(delta) > 0:
keys = list(delta.keys())
details = running_pool_details[2]
if details['erasure_code_profile'] and 'size' in keys:
del delta['size']
if details['pg_autoscale_mode'] == 'on':
delta.pop('pg_num', None)
delta.pop('pgp_num', None)
changed = len(delta) > 0
if changed and not module.check_mode:
rc, cmd, out, err = update_pool(module,
cluster,
name,
user,
user_key,
delta,
container_image=container_image) # noqa: E501
elif not module.check_mode:
rc, cmd, out, err = exec_command(module,
create_pool(cluster,
user,
user_key,
user_pool_config=user_pool_config, # noqa: E501
container_image=container_image)) # noqa: E501
if user_pool_config['application']['value']:
rc, _, _, _ = exec_command(module,
enable_application_pool(cluster,
name,
user_pool_config['application']['value'], # noqa: E501
user,
user_key,
container_image=container_image)) # noqa: E501
if rc == 0 and user_pool_config['application']['value'] == 'rbd': # noqa: E501
rc, cmd, out, err = exec_command(module,
init_rbd_pool(cluster,
user_pool_config['pool_name']['value'], # noqa: E501
user,
user_key,
container_image=container_image)) # noqa: E501
if user_pool_config['min_size']['value']:
# not implemented yet
pass
elif state == "list":
rc, cmd, out, err = exec_command(module,
list_pools(cluster,
name, user,
user_key,
details,
container_image=container_image)) # noqa: E501
if rc != 0:
out = "Couldn't list pool(s) present on the cluster"
elif state == "absent":
rc, cmd, out, err = exec_command(module,
check_pool_exist(cluster,
name, user,
user_key,
container_image=container_image)) # noqa: E501
changed = rc == 0
if changed and not module.check_mode:
rc, cmd, out, err = exec_command(module,
remove_pool(cluster,
name,
user,
user_key,
container_image=container_image)) # noqa: E501
exit_module(module=module, out=out, rc=rc, cmd=cmd, err=err, startd=startd,
changed=changed)
def main():
run_module()
if __name__ == '__main__':
main()