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community.general/plugins/modules/system/aix_lvol.py
Felix Fontein f84a9bf932
Fix non-matching defaults. (#5452)
2022-11-01 19:25:51 +01:00

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#!/usr/bin/python
# -*- coding: utf-8 -*-
# Copyright (c) 2016, Alain Dejoux <adejoux@djouxtech.net>
# 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
from __future__ import absolute_import, division, print_function
__metaclass__ = type
DOCUMENTATION = r'''
---
author:
- Alain Dejoux (@adejoux)
module: aix_lvol
short_description: Configure AIX LVM logical volumes
description:
- This module creates, removes or resizes AIX logical volumes. Inspired by lvol module.
options:
vg:
description:
- The volume group this logical volume is part of.
type: str
required: true
lv:
description:
- The name of the logical volume.
type: str
required: true
lv_type:
description:
- The type of the logical volume.
type: str
default: jfs2
size:
description:
- The size of the logical volume with one of the [MGT] units.
type: str
copies:
description:
- The number of copies of the logical volume.
- Maximum copies are 3.
type: int
default: 1
policy:
description:
- Sets the interphysical volume allocation policy.
- C(maximum) allocates logical partitions across the maximum number of physical volumes.
- C(minimum) allocates logical partitions across the minimum number of physical volumes.
type: str
choices: [ maximum, minimum ]
default: maximum
state:
description:
- Control if the logical volume exists. If C(present) and the
volume does not already exist then the C(size) option is required.
type: str
choices: [ absent, present ]
default: present
opts:
description:
- Free-form options to be passed to the mklv command.
type: str
default: ''
pvs:
description:
- A list of physical volumes e.g. C(hdisk1,hdisk2).
type: list
elements: str
default: []
'''
EXAMPLES = r'''
- name: Create a logical volume of 512M
community.general.aix_lvol:
vg: testvg
lv: testlv
size: 512M
- name: Create a logical volume of 512M with disks hdisk1 and hdisk2
community.general.aix_lvol:
vg: testvg
lv: test2lv
size: 512M
pvs: [ hdisk1, hdisk2 ]
- name: Create a logical volume of 512M mirrored
community.general.aix_lvol:
vg: testvg
lv: test3lv
size: 512M
copies: 2
- name: Create a logical volume of 1G with a minimum placement policy
community.general.aix_lvol:
vg: rootvg
lv: test4lv
size: 1G
policy: minimum
- name: Create a logical volume with special options like mirror pool
community.general.aix_lvol:
vg: testvg
lv: testlv
size: 512M
opts: -p copy1=poolA -p copy2=poolB
- name: Extend the logical volume to 1200M
community.general.aix_lvol:
vg: testvg
lv: test4lv
size: 1200M
- name: Remove the logical volume
community.general.aix_lvol:
vg: testvg
lv: testlv
state: absent
'''
RETURN = r'''
msg:
type: str
description: A friendly message describing the task result.
returned: always
sample: Logical volume testlv created.
'''
import re
from ansible.module_utils.basic import AnsibleModule
def convert_size(module, size):
unit = size[-1].upper()
units = ['M', 'G', 'T']
try:
multiplier = 1024 ** units.index(unit)
except ValueError:
module.fail_json(msg="No valid size unit specified.")
return int(size[:-1]) * multiplier
def round_ppsize(x, base=16):
new_size = int(base * round(float(x) / base))
if new_size < x:
new_size += base
return new_size
def parse_lv(data):
name = None
for line in data.splitlines():
match = re.search(r"LOGICAL VOLUME:\s+(\w+)\s+VOLUME GROUP:\s+(\w+)", line)
if match is not None:
name = match.group(1)
vg = match.group(2)
continue
match = re.search(r"LPs:\s+(\d+).*PPs", line)
if match is not None:
lps = int(match.group(1))
continue
match = re.search(r"PP SIZE:\s+(\d+)", line)
if match is not None:
pp_size = int(match.group(1))
continue
match = re.search(r"INTER-POLICY:\s+(\w+)", line)
if match is not None:
policy = match.group(1)
continue
if not name:
return None
size = lps * pp_size
return {'name': name, 'vg': vg, 'size': size, 'policy': policy}
def parse_vg(data):
for line in data.splitlines():
match = re.search(r"VOLUME GROUP:\s+(\w+)", line)
if match is not None:
name = match.group(1)
continue
match = re.search(r"TOTAL PP.*\((\d+)", line)
if match is not None:
size = int(match.group(1))
continue
match = re.search(r"PP SIZE:\s+(\d+)", line)
if match is not None:
pp_size = int(match.group(1))
continue
match = re.search(r"FREE PP.*\((\d+)", line)
if match is not None:
free = int(match.group(1))
continue
return {'name': name, 'size': size, 'free': free, 'pp_size': pp_size}
def main():
module = AnsibleModule(
argument_spec=dict(
vg=dict(type='str', required=True),
lv=dict(type='str', required=True),
lv_type=dict(type='str', default='jfs2'),
size=dict(type='str'),
opts=dict(type='str', default=''),
copies=dict(type='int', default=1),
state=dict(type='str', default='present', choices=['absent', 'present']),
policy=dict(type='str', default='maximum', choices=['maximum', 'minimum']),
pvs=dict(type='list', elements='str', default=list())
),
supports_check_mode=True,
)
vg = module.params['vg']
lv = module.params['lv']
lv_type = module.params['lv_type']
size = module.params['size']
opts = module.params['opts']
copies = module.params['copies']
policy = module.params['policy']
state = module.params['state']
pvs = module.params['pvs']
pv_list = ' '.join(pvs)
if policy == 'maximum':
lv_policy = 'x'
else:
lv_policy = 'm'
# Add echo command when running in check-mode
if module.check_mode:
test_opt = 'echo '
else:
test_opt = ''
# check if system commands are available
lsvg_cmd = module.get_bin_path("lsvg", required=True)
lslv_cmd = module.get_bin_path("lslv", required=True)
# Get information on volume group requested
rc, vg_info, err = module.run_command("%s %s" % (lsvg_cmd, vg))
if rc != 0:
if state == 'absent':
module.exit_json(changed=False, msg="Volume group %s does not exist." % vg)
else:
module.fail_json(msg="Volume group %s does not exist." % vg, rc=rc, out=vg_info, err=err)
this_vg = parse_vg(vg_info)
if size is not None:
# Calculate pp size and round it up based on pp size.
lv_size = round_ppsize(convert_size(module, size), base=this_vg['pp_size'])
# Get information on logical volume requested
rc, lv_info, err = module.run_command(
"%s %s" % (lslv_cmd, lv))
if rc != 0:
if state == 'absent':
module.exit_json(changed=False, msg="Logical Volume %s does not exist." % lv)
changed = False
this_lv = parse_lv(lv_info)
if state == 'present' and not size:
if this_lv is None:
module.fail_json(msg="No size given.")
if this_lv is None:
if state == 'present':
if lv_size > this_vg['free']:
module.fail_json(msg="Not enough free space in volume group %s: %s MB free." % (this_vg['name'], this_vg['free']))
# create LV
mklv_cmd = module.get_bin_path("mklv", required=True)
cmd = "%s %s -t %s -y %s -c %s -e %s %s %s %sM %s" % (test_opt, mklv_cmd, lv_type, lv, copies, lv_policy, opts, vg, lv_size, pv_list)
rc, out, err = module.run_command(cmd)
if rc == 0:
module.exit_json(changed=True, msg="Logical volume %s created." % lv)
else:
module.fail_json(msg="Creating logical volume %s failed." % lv, rc=rc, out=out, err=err)
else:
if state == 'absent':
# remove LV
rmlv_cmd = module.get_bin_path("rmlv", required=True)
rc, out, err = module.run_command("%s %s -f %s" % (test_opt, rmlv_cmd, this_lv['name']))
if rc == 0:
module.exit_json(changed=True, msg="Logical volume %s deleted." % lv)
else:
module.fail_json(msg="Failed to remove logical volume %s." % lv, rc=rc, out=out, err=err)
else:
if this_lv['policy'] != policy:
# change lv allocation policy
chlv_cmd = module.get_bin_path("chlv", required=True)
rc, out, err = module.run_command("%s %s -e %s %s" % (test_opt, chlv_cmd, lv_policy, this_lv['name']))
if rc == 0:
module.exit_json(changed=True, msg="Logical volume %s policy changed: %s." % (lv, policy))
else:
module.fail_json(msg="Failed to change logical volume %s policy." % lv, rc=rc, out=out, err=err)
if vg != this_lv['vg']:
module.fail_json(msg="Logical volume %s already exist in volume group %s" % (lv, this_lv['vg']))
# from here the last remaining action is to resize it, if no size parameter is passed we do nothing.
if not size:
module.exit_json(changed=False, msg="Logical volume %s already exist." % (lv))
# resize LV based on absolute values
if int(lv_size) > this_lv['size']:
extendlv_cmd = module.get_bin_path("extendlv", required=True)
cmd = "%s %s %s %sM" % (test_opt, extendlv_cmd, lv, lv_size - this_lv['size'])
rc, out, err = module.run_command(cmd)
if rc == 0:
module.exit_json(changed=True, msg="Logical volume %s size extended to %sMB." % (lv, lv_size))
else:
module.fail_json(msg="Unable to resize %s to %sMB." % (lv, lv_size), rc=rc, out=out, err=err)
elif lv_size < this_lv['size']:
module.fail_json(msg="No shrinking of Logical Volume %s permitted. Current size: %s MB" % (lv, this_lv['size']))
else:
module.exit_json(changed=False, msg="Logical volume %s size is already %sMB." % (lv, lv_size))
if __name__ == '__main__':
main()
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