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community.general/plugins/modules/storage/zfs/zfs.py

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2020-03-09 10:11:07 +01:00
#!/usr/bin/python
# -*- coding: utf-8 -*-
# Copyright (c) 2013, Johan Wiren <johan.wiren.se@gmail.com>
# Copyright (c) 2017, Ansible Project
# GNU General Public License v3.0+ (see LICENSES/GPL-3.0-or-later.txt or https://www.gnu.org/licenses/gpl-3.0.txt)
# SPDX-License-Identifier: GPL-3.0-or-later
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from __future__ import absolute_import, division, print_function
__metaclass__ = type
DOCUMENTATION = '''
---
module: zfs
short_description: Manage zfs
description:
- Manages ZFS file systems, volumes, clones and snapshots
options:
name:
description:
- File system, snapshot or volume name e.g. C(rpool/myfs).
required: true
type: str
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state:
description:
- Whether to create (C(present)), or remove (C(absent)) a
file system, snapshot or volume. All parents/children
will be created/destroyed as needed to reach the desired state.
choices: [ absent, present ]
required: true
type: str
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origin:
description:
- Snapshot from which to create a clone.
type: str
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extra_zfs_properties:
description:
- A dictionary of zfs properties to be set.
- See the zfs(8) man page for more information.
type: dict
notes:
- C(check_mode) is supported, but in certain situations it may report a task
as changed that will not be reported as changed when C(check_mode) is disabled.
For example, this might occur when the zpool C(altroot) option is set or when
a size is written using human-readable notation, such as C(1M) or C(1024K),
instead of as an unqualified byte count, such as C(1048576).
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author:
- Johan Wiren (@johanwiren)
'''
EXAMPLES = '''
- name: Create a new file system called myfs in pool rpool with the setuid property turned off
community.general.zfs:
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name: rpool/myfs
state: present
extra_zfs_properties:
setuid: off
- name: Create a new volume called myvol in pool rpool.
community.general.zfs:
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name: rpool/myvol
state: present
extra_zfs_properties:
volsize: 10M
- name: Create a snapshot of rpool/myfs file system.
community.general.zfs:
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name: rpool/myfs@mysnapshot
state: present
- name: Create a new file system called myfs2 with snapdir enabled
community.general.zfs:
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name: rpool/myfs2
state: present
extra_zfs_properties:
snapdir: enabled
- name: Create a new file system by cloning a snapshot
community.general.zfs:
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name: rpool/cloned_fs
state: present
origin: rpool/myfs@mysnapshot
- name: Destroy a filesystem
community.general.zfs:
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name: rpool/myfs
state: absent
'''
import os
from ansible.module_utils.basic import AnsibleModule
class Zfs(object):
def __init__(self, module, name, properties):
self.module = module
self.name = name
self.properties = properties
self.changed = False
self.zfs_cmd = module.get_bin_path('zfs', True)
self.zpool_cmd = module.get_bin_path('zpool', True)
self.pool = name.split('/')[0].split('@')[0]
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self.is_solaris = os.uname()[0] == 'SunOS'
self.is_openzfs = self.check_openzfs()
self.enhanced_sharing = self.check_enhanced_sharing()
def check_openzfs(self):
cmd = [self.zpool_cmd]
cmd.extend(['get', 'version'])
cmd.append(self.pool)
(rc, out, err) = self.module.run_command(cmd, check_rc=True)
version = out.splitlines()[-1].split()[2]
if version == '-':
return True
if int(version) == 5000:
return True
return False
def check_enhanced_sharing(self):
if self.is_solaris and not self.is_openzfs:
cmd = [self.zpool_cmd]
cmd.extend(['get', 'version'])
cmd.append(self.pool)
(rc, out, err) = self.module.run_command(cmd, check_rc=True)
version = out.splitlines()[-1].split()[2]
if int(version) >= 34:
return True
return False
def exists(self):
cmd = [self.zfs_cmd, 'list', '-t', 'all', self.name]
rc, dummy, dummy = self.module.run_command(cmd)
return rc == 0
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def create(self):
if self.module.check_mode:
self.changed = True
return
properties = self.properties
origin = self.module.params.get('origin')
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cmd = [self.zfs_cmd]
if "@" in self.name:
action = 'snapshot'
elif origin:
action = 'clone'
else:
action = 'create'
cmd.append(action)
if action in ['create', 'clone']:
cmd += ['-p']
if properties:
for prop, value in properties.items():
if prop == 'volsize':
cmd += ['-V', value]
elif prop == 'volblocksize':
cmd += ['-b', value]
else:
cmd += ['-o', '%s=%s' % (prop, value)]
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if origin and action == 'clone':
cmd.append(origin)
cmd.append(self.name)
self.module.run_command(cmd, check_rc=True)
self.changed = True
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def destroy(self):
if self.module.check_mode:
self.changed = True
return
cmd = [self.zfs_cmd, 'destroy', '-R', self.name]
self.module.run_command(cmd, check_rc=True)
self.changed = True
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def set_property(self, prop, value):
if self.module.check_mode:
self.changed = True
return
cmd = [self.zfs_cmd, 'set', prop + '=' + str(value), self.name]
self.module.run_command(cmd, check_rc=True)
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def set_properties_if_changed(self):
diff = {'before': {'extra_zfs_properties': {}}, 'after': {'extra_zfs_properties': {}}}
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current_properties = self.get_current_properties()
for prop, value in self.properties.items():
current_value = current_properties.get(prop, None)
if current_value != value:
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self.set_property(prop, value)
diff['before']['extra_zfs_properties'][prop] = current_value
diff['after']['extra_zfs_properties'][prop] = value
if self.module.check_mode:
return diff
updated_properties = self.get_current_properties()
for prop in self.properties:
value = updated_properties.get(prop, None)
if value is None:
self.module.fail_json(msg="zfsprop was not present after being successfully set: %s" % prop)
if current_properties.get(prop, None) != value:
self.changed = True
if prop in diff['after']['extra_zfs_properties']:
diff['after']['extra_zfs_properties'][prop] = value
return diff
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def get_current_properties(self):
cmd = [self.zfs_cmd, 'get', '-H', '-p', '-o', "property,value,source"]
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if self.enhanced_sharing:
cmd += ['-e']
cmd += ['all', self.name]
rc, out, err = self.module.run_command(cmd)
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properties = dict()
for line in out.splitlines():
prop, value, source = line.split('\t')
# include source '-' so that creation-only properties are not removed
# to avoids errors when the dataset already exists and the property is not changed
# this scenario is most likely when the same playbook is run more than once
if source in ('local', 'received', '-'):
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properties[prop] = value
# Add alias for enhanced sharing properties
if self.enhanced_sharing:
properties['sharenfs'] = properties.get('share.nfs', None)
properties['sharesmb'] = properties.get('share.smb', None)
return properties
def main():
module = AnsibleModule(
argument_spec=dict(
name=dict(type='str', required=True),
state=dict(type='str', required=True, choices=['absent', 'present']),
origin=dict(type='str'),
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extra_zfs_properties=dict(type='dict', default={}),
),
supports_check_mode=True,
)
state = module.params.get('state')
name = module.params.get('name')
if module.params.get('origin') and '@' in name:
module.fail_json(msg='cannot specify origin when operating on a snapshot')
# Reverse the boolification of zfs properties
for prop, value in module.params['extra_zfs_properties'].items():
if isinstance(value, bool):
if value is True:
module.params['extra_zfs_properties'][prop] = 'on'
else:
module.params['extra_zfs_properties'][prop] = 'off'
else:
module.params['extra_zfs_properties'][prop] = value
result = dict(
name=name,
state=state,
)
zfs = Zfs(module, name, module.params['extra_zfs_properties'])
if state == 'present':
if zfs.exists():
result['diff'] = zfs.set_properties_if_changed()
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else:
zfs.create()
result['diff'] = {'before': {'state': 'absent'}, 'after': {'state': state}}
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elif state == 'absent':
if zfs.exists():
zfs.destroy()
result['diff'] = {'before': {'state': 'present'}, 'after': {'state': state}}
else:
result['diff'] = {}
result['diff']['before_header'] = name
result['diff']['after_header'] = name
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result.update(zfs.properties)
result['changed'] = zfs.changed
module.exit_json(**result)
if __name__ == '__main__':
main()