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

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2020-03-09 10:11:07 +01:00
#!/usr/bin/python
# -*- coding: utf-8 -*-
# (c) 2016, Adam Števko <adam.stevko@gmail.com>
# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
from __future__ import absolute_import, division, print_function
__metaclass__ = type
DOCUMENTATION = '''
---
module: zpool_facts
short_description: Gather facts about ZFS pools.
description:
- Gather facts from ZFS pool properties.
author: Adam Števko (@xen0l)
options:
name:
description:
- ZFS pool name.
aliases: [ "pool", "zpool" ]
required: false
parsable:
description:
- Specifies if property values should be displayed in machine
friendly format.
type: bool
default: False
required: false
properties:
description:
- Specifies which dataset properties should be queried in comma-separated format.
For more information about dataset properties, check zpool(1M) man page.
aliases: [ "props" ]
default: all
required: false
'''
EXAMPLES = '''
- name: Gather facts about ZFS pool rpool
community.general.zpool_facts: pool=rpool
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- name: Gather space usage about all imported ZFS pools
community.general.zpool_facts: properties='free,size'
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- name: Print gathered information
debug:
msg: 'ZFS pool {{ item.name }} has {{ item.free }} free space out of {{ item.size }}.'
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with_items: '{{ ansible_zfs_pools }}'
'''
RETURN = '''
ansible_facts:
description: Dictionary containing all the detailed information about the ZFS pool facts
returned: always
type: complex
contains:
ansible_zfs_pools:
description: ZFS pool facts
returned: always
type: str
sample:
{
"allocated": "3.46G",
"altroot": "-",
"autoexpand": "off",
"autoreplace": "off",
"bootfs": "rpool/ROOT/openindiana",
"cachefile": "-",
"capacity": "6%",
"comment": "-",
"dedupditto": "0",
"dedupratio": "1.00x",
"delegation": "on",
"expandsize": "-",
"failmode": "wait",
"feature@async_destroy": "enabled",
"feature@bookmarks": "enabled",
"feature@edonr": "enabled",
"feature@embedded_data": "active",
"feature@empty_bpobj": "active",
"feature@enabled_txg": "active",
"feature@extensible_dataset": "enabled",
"feature@filesystem_limits": "enabled",
"feature@hole_birth": "active",
"feature@large_blocks": "enabled",
"feature@lz4_compress": "active",
"feature@multi_vdev_crash_dump": "enabled",
"feature@sha512": "enabled",
"feature@skein": "enabled",
"feature@spacemap_histogram": "active",
"fragmentation": "3%",
"free": "46.3G",
"freeing": "0",
"guid": "15729052870819522408",
"health": "ONLINE",
"leaked": "0",
"listsnapshots": "off",
"name": "rpool",
"readonly": "off",
"size": "49.8G",
"version": "-"
}
name:
description: ZFS pool name
returned: always
type: str
sample: rpool
parsable:
description: if parsable output should be provided in machine friendly format.
returned: if 'parsable' is set to True
type: bool
sample: True
'''
from collections import defaultdict
from ansible.module_utils.six import iteritems
from ansible.module_utils.basic import AnsibleModule
class ZPoolFacts(object):
def __init__(self, module):
self.module = module
self.name = module.params['name']
self.parsable = module.params['parsable']
self.properties = module.params['properties']
self._pools = defaultdict(dict)
self.facts = []
def pool_exists(self):
cmd = [self.module.get_bin_path('zpool')]
cmd.append('list')
cmd.append(self.name)
(rc, out, err) = self.module.run_command(cmd)
if rc == 0:
return True
else:
return False
def get_facts(self):
cmd = [self.module.get_bin_path('zpool')]
cmd.append('get')
cmd.append('-H')
if self.parsable:
cmd.append('-p')
cmd.append('-o')
cmd.append('name,property,value')
cmd.append(self.properties)
if self.name:
cmd.append(self.name)
(rc, out, err) = self.module.run_command(cmd)
if rc == 0:
for line in out.splitlines():
pool, property, value = line.split('\t')
self._pools[pool].update({property: value})
for k, v in iteritems(self._pools):
v.update({'name': k})
self.facts.append(v)
return {'ansible_zfs_pools': self.facts}
else:
self.module.fail_json(msg='Error while trying to get facts about ZFS pool: %s' % self.name,
stderr=err,
rc=rc)
def main():
module = AnsibleModule(
argument_spec=dict(
name=dict(required=False, aliases=['pool', 'zpool'], type='str'),
parsable=dict(required=False, default=False, type='bool'),
properties=dict(required=False, default='all', type='str'),
),
supports_check_mode=True
)
zpool_facts = ZPoolFacts(module)
result = {}
result['changed'] = False
result['name'] = zpool_facts.name
if zpool_facts.parsable:
result['parsable'] = zpool_facts.parsable
if zpool_facts.name is not None:
if zpool_facts.pool_exists():
result['ansible_facts'] = zpool_facts.get_facts()
else:
module.fail_json(msg='ZFS pool %s does not exist!' % zpool_facts.name)
else:
result['ansible_facts'] = zpool_facts.get_facts()
module.exit_json(**result)
if __name__ == '__main__':
main()