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ceph-ansible/library/ceph_fs.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
import datetime
import json
import os
ANSIBLE_METADATA = {
'metadata_version': '1.1',
'status': ['preview'],
'supported_by': 'community'
}
DOCUMENTATION = '''
---
module: ceph_fs
short_description: Manage Ceph File System
version_added: "2.8"
description:
- Manage Ceph File System(s) creation, deletion and updates.
options:
cluster:
description:
- The ceph cluster name.
required: false
default: ceph
name:
description:
- name of the Ceph File System.
required: true
state:
description:
If 'present' is used, the module creates a filesystem if it
doesn't exist or update it if it already exists.
If 'absent' is used, the module will simply delete the filesystem.
If 'info' is used, the module will return all details about the
existing filesystem (json formatted).
required: false
choices: ['present', 'absent', 'info']
default: present
data:
description:
- name of the data pool.
required: false
metadata:
description:
- name of the metadata pool.
required: false
max_mds:
description:
- name of the max_mds attribute.
required: false
author:
- Dimitri Savineau <dsavinea@redhat.com>
'''
EXAMPLES = '''
- name: create a Ceph File System
ceph_fs:
name: foo
data: bar_data
metadata: bar_metadata
max_mds: 2
- name: get a Ceph File System information
ceph_fs:
name: foo
state: info
- name: delete a Ceph File System
ceph_fs:
name: foo
state: absent
'''
RETURN = '''# '''
def container_exec(binary, container_image):
'''
Build the docker CLI to run a command inside a container
'''
container_binary = os.getenv('CEPH_CONTAINER_BINARY')
command_exec = [container_binary,
'run',
'--rm',
'--net=host',
'-v', '/etc/ceph:/etc/ceph:z',
'-v', '/var/lib/ceph/:/var/lib/ceph/:z',
'-v', '/var/log/ceph/:/var/log/ceph/:z',
'--entrypoint=' + binary, container_image]
return command_exec
def is_containerized():
'''
Check if we are running on a containerized cluster
'''
if 'CEPH_CONTAINER_IMAGE' in os.environ:
container_image = os.getenv('CEPH_CONTAINER_IMAGE')
else:
container_image = None
return container_image
def pre_generate_ceph_cmd(container_image=None):
'''
Generate ceph prefix comaand
'''
if container_image:
cmd = container_exec('ceph', container_image)
else:
cmd = ['ceph']
return cmd
def generate_ceph_cmd(cluster, args, container_image=None):
'''
Generate 'ceph' command line to execute
'''
cmd = pre_generate_ceph_cmd(container_image=container_image)
base_cmd = [
'--cluster',
cluster,
'fs'
]
cmd.extend(base_cmd + args)
return cmd
def exec_commands(module, cmd):
'''
Execute command(s)
'''
rc, out, err = module.run_command(cmd)
return rc, cmd, out, err
def create_fs(module, container_image=None):
'''
Create a new fs
'''
cluster = module.params.get('cluster')
name = module.params.get('name')
data = module.params.get('data')
metadata = module.params.get('metadata')
args = ['new', name, metadata, data]
cmd = generate_ceph_cmd(cluster=cluster, args=args, container_image=container_image)
return cmd
def get_fs(module, container_image=None):
'''
Get existing fs
'''
cluster = module.params.get('cluster')
name = module.params.get('name')
args = ['get', name, '--format=json']
cmd = generate_ceph_cmd(cluster=cluster, args=args, container_image=container_image)
return cmd
def remove_fs(module, container_image=None):
'''
Remove a fs
'''
cluster = module.params.get('cluster')
name = module.params.get('name')
args = ['rm', name, '--yes-i-really-mean-it']
cmd = generate_ceph_cmd(cluster=cluster, args=args, container_image=container_image)
return cmd
def fail_fs(module, container_image=None):
'''
Fail a fs
'''
cluster = module.params.get('cluster')
name = module.params.get('name')
args = ['fail', name]
cmd = generate_ceph_cmd(cluster=cluster, args=args, container_image=container_image)
return cmd
def set_fs(module, container_image=None):
'''
Set parameter to a fs
'''
cluster = module.params.get('cluster')
name = module.params.get('name')
max_mds = module.params.get('max_mds')
args = ['set', name, 'max_mds', str(max_mds)]
cmd = generate_ceph_cmd(cluster=cluster, args=args, container_image=container_image)
return cmd
def exit_module(module, out, rc, cmd, err, startd, changed=False):
endd = datetime.datetime.now()
delta = endd - startd
result = dict(
cmd=cmd,
start=str(startd),
end=str(endd),
delta=str(delta),
rc=rc,
stdout=out.rstrip("\r\n"),
stderr=err.rstrip("\r\n"),
changed=changed,
)
module.exit_json(**result)
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, choices=['present', 'absent', 'info'], default='present'),
data=dict(type='str', required=False),
metadata=dict(type='str', required=False),
max_mds=dict(type='int', required=False),
)
module = AnsibleModule(
argument_spec=module_args,
supports_check_mode=True,
required_if=[['state', 'present', ['data', 'metadata']]],
)
# Gather module parameters in variables
name = module.params.get('name')
state = module.params.get('state')
max_mds = module.params.get('max_mds')
if module.check_mode:
module.exit_json(
changed=False,
stdout='',
stderr='',
rc=0,
start='',
end='',
delta='',
)
startd = datetime.datetime.now()
changed = False
# will return either the image name or None
container_image = is_containerized()
if state == "present":
rc, cmd, out, err = exec_commands(module, get_fs(module, container_image=container_image))
if rc == 0:
fs = json.loads(out)
if max_mds and fs["mdsmap"]["max_mds"] != max_mds:
rc, cmd, out, err = exec_commands(module, set_fs(module, container_image=container_image))
if rc == 0:
changed = True
else:
rc, cmd, out, err = exec_commands(module, create_fs(module, container_image=container_image))
if max_mds and max_mds > 1:
exec_commands(module, set_fs(module, container_image=container_image))
if rc == 0:
changed = True
elif state == "absent":
rc, cmd, out, err = exec_commands(module, get_fs(module, container_image=container_image))
if rc == 0:
exec_commands(module, fail_fs(module, container_image=container_image))
rc, cmd, out, err = exec_commands(module, remove_fs(module, container_image=container_image))
if rc == 0:
changed = True
else:
rc = 0
out = "Ceph File System {} doesn't exist".format(name)
elif state == "info":
rc, cmd, out, err = exec_commands(module, get_fs(module, container_image=container_image))
exit_module(module=module, out=out, rc=rc, cmd=cmd, err=err, startd=startd, changed=changed)
def main():
run_module()
if __name__ == '__main__':
main()
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