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340
plugins/modules/system/aix_lvol.py
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340
plugins/modules/system/aix_lvol.py
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#!/usr/bin/python
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# -*- coding: utf-8 -*-
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# Copyright: (c) 2016, Alain Dejoux <adejoux@djouxtech.net>
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# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
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from __future__ import absolute_import, division, print_function
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__metaclass__ = type
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ANSIBLE_METADATA = {'metadata_version': '1.1',
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'status': ['preview'],
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'supported_by': 'community'}
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DOCUMENTATION = r'''
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---
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author:
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- Alain Dejoux (@adejoux)
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module: aix_lvol
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short_description: Configure AIX LVM logical volumes
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description:
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- This module creates, removes or resizes AIX logical volumes. Inspired by lvol module.
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options:
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vg:
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description:
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- The volume group this logical volume is part of.
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type: str
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required: true
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lv:
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description:
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- The name of the logical volume.
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type: str
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required: true
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lv_type:
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description:
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- The type of the logical volume.
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type: str
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default: jfs2
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size:
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description:
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- The size of the logical volume with one of the [MGT] units.
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type: str
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copies:
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description:
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- The number of copies of the logical volume.
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- Maximum copies are 3.
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type: int
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default: 1
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policy:
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description:
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- Sets the interphysical volume allocation policy.
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- C(maximum) allocates logical partitions across the maximum number of physical volumes.
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- C(minimum) allocates logical partitions across the minimum number of physical volumes.
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type: str
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choices: [ maximum, minimum ]
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default: maximum
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state:
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description:
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- Control if the logical volume exists. If C(present) and the
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volume does not already exist then the C(size) option is required.
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type: str
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choices: [ absent, present ]
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default: present
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opts:
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description:
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- Free-form options to be passed to the mklv command.
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type: str
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pvs:
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description:
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- A list of physical volumes e.g. C(hdisk1,hdisk2).
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type: list
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'''
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EXAMPLES = r'''
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- name: Create a logical volume of 512M
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aix_lvol:
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vg: testvg
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lv: testlv
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size: 512M
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- name: Create a logical volume of 512M with disks hdisk1 and hdisk2
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aix_lvol:
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vg: testvg
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lv: test2lv
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size: 512M
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pvs: [ hdisk1, hdisk2 ]
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- name: Create a logical volume of 512M mirrored
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aix_lvol:
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vg: testvg
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lv: test3lv
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size: 512M
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copies: 2
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- name: Create a logical volume of 1G with a minimum placement policy
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aix_lvol:
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vg: rootvg
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lv: test4lv
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size: 1G
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policy: minimum
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- name: Create a logical volume with special options like mirror pool
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aix_lvol:
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vg: testvg
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lv: testlv
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size: 512M
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opts: -p copy1=poolA -p copy2=poolB
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- name: Extend the logical volume to 1200M
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aix_lvol:
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vg: testvg
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lv: test4lv
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size: 1200M
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- name: Remove the logical volume
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aix_lvol:
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vg: testvg
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lv: testlv
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state: absent
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'''
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RETURN = r'''
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msg:
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type: str
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description: A friendly message describing the task result.
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returned: always
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sample: Logical volume testlv created.
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'''
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import re
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from ansible.module_utils.basic import AnsibleModule
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def convert_size(module, size):
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unit = size[-1].upper()
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units = ['M', 'G', 'T']
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try:
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multiplier = 1024 ** units.index(unit)
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except ValueError:
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module.fail_json(msg="No valid size unit specified.")
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return int(size[:-1]) * multiplier
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def round_ppsize(x, base=16):
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new_size = int(base * round(float(x) / base))
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if new_size < x:
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new_size += base
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return new_size
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def parse_lv(data):
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name = None
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for line in data.splitlines():
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match = re.search(r"LOGICAL VOLUME:\s+(\w+)\s+VOLUME GROUP:\s+(\w+)", line)
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if match is not None:
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name = match.group(1)
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vg = match.group(2)
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continue
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match = re.search(r"LPs:\s+(\d+).*PPs", line)
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if match is not None:
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lps = int(match.group(1))
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continue
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match = re.search(r"PP SIZE:\s+(\d+)", line)
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if match is not None:
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pp_size = int(match.group(1))
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continue
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match = re.search(r"INTER-POLICY:\s+(\w+)", line)
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if match is not None:
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policy = match.group(1)
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continue
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if not name:
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return None
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size = lps * pp_size
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return {'name': name, 'vg': vg, 'size': size, 'policy': policy}
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def parse_vg(data):
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for line in data.splitlines():
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match = re.search(r"VOLUME GROUP:\s+(\w+)", line)
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if match is not None:
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name = match.group(1)
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continue
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match = re.search(r"TOTAL PP.*\((\d+)", line)
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if match is not None:
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size = int(match.group(1))
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continue
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match = re.search(r"PP SIZE:\s+(\d+)", line)
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if match is not None:
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pp_size = int(match.group(1))
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continue
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match = re.search(r"FREE PP.*\((\d+)", line)
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if match is not None:
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free = int(match.group(1))
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continue
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return {'name': name, 'size': size, 'free': free, 'pp_size': pp_size}
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def main():
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module = AnsibleModule(
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argument_spec=dict(
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vg=dict(type='str', required=True),
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lv=dict(type='str', required=True),
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lv_type=dict(type='str', default='jfs2'),
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size=dict(type='str'),
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opts=dict(type='str', default=''),
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copies=dict(type='int', default=1),
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state=dict(type='str', default='present', choices=['absent', 'present']),
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policy=dict(type='str', default='maximum', choices=['maximum', 'minimum']),
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pvs=dict(type='list', default=list())
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),
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supports_check_mode=True,
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)
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vg = module.params['vg']
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lv = module.params['lv']
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lv_type = module.params['lv_type']
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size = module.params['size']
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opts = module.params['opts']
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copies = module.params['copies']
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policy = module.params['policy']
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state = module.params['state']
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pvs = module.params['pvs']
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pv_list = ' '.join(pvs)
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if policy == 'maximum':
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lv_policy = 'x'
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else:
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lv_policy = 'm'
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# Add echo command when running in check-mode
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if module.check_mode:
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test_opt = 'echo '
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else:
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test_opt = ''
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# check if system commands are available
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lsvg_cmd = module.get_bin_path("lsvg", required=True)
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lslv_cmd = module.get_bin_path("lslv", required=True)
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# Get information on volume group requested
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rc, vg_info, err = module.run_command("%s %s" % (lsvg_cmd, vg))
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if rc != 0:
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if state == 'absent':
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module.exit_json(changed=False, msg="Volume group %s does not exist." % vg)
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else:
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module.fail_json(msg="Volume group %s does not exist." % vg, rc=rc, out=vg_info, err=err)
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this_vg = parse_vg(vg_info)
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if size is not None:
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# Calculate pp size and round it up based on pp size.
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lv_size = round_ppsize(convert_size(module, size), base=this_vg['pp_size'])
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# Get information on logical volume requested
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rc, lv_info, err = module.run_command(
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"%s %s" % (lslv_cmd, lv))
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if rc != 0:
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if state == 'absent':
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module.exit_json(changed=False, msg="Logical Volume %s does not exist." % lv)
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changed = False
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this_lv = parse_lv(lv_info)
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if state == 'present' and not size:
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if this_lv is None:
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module.fail_json(msg="No size given.")
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if this_lv is None:
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if state == 'present':
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if lv_size > this_vg['free']:
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module.fail_json(msg="Not enough free space in volume group %s: %s MB free." % (this_vg['name'], this_vg['free']))
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# create LV
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mklv_cmd = module.get_bin_path("mklv", required=True)
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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)
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rc, out, err = module.run_command(cmd)
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if rc == 0:
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module.exit_json(changed=True, msg="Logical volume %s created." % lv)
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else:
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module.fail_json(msg="Creating logical volume %s failed." % lv, rc=rc, out=out, err=err)
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else:
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if state == 'absent':
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# remove LV
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rmlv_cmd = module.get_bin_path("rmlv", required=True)
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rc, out, err = module.run_command("%s %s -f %s" % (test_opt, rmlv_cmd, this_lv['name']))
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if rc == 0:
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module.exit_json(changed=True, msg="Logical volume %s deleted." % lv)
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else:
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module.fail_json(msg="Failed to remove logical volume %s." % lv, rc=rc, out=out, err=err)
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else:
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if this_lv['policy'] != policy:
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# change lv allocation policy
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chlv_cmd = module.get_bin_path("chlv", required=True)
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rc, out, err = module.run_command("%s %s -e %s %s" % (test_opt, chlv_cmd, lv_policy, this_lv['name']))
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if rc == 0:
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module.exit_json(changed=True, msg="Logical volume %s policy changed: %s." % (lv, policy))
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else:
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module.fail_json(msg="Failed to change logical volume %s policy." % lv, rc=rc, out=out, err=err)
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if vg != this_lv['vg']:
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module.fail_json(msg="Logical volume %s already exist in volume group %s" % (lv, this_lv['vg']))
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# from here the last remaining action is to resize it, if no size parameter is passed we do nothing.
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if not size:
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module.exit_json(changed=False, msg="Logical volume %s already exist." % (lv))
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# resize LV based on absolute values
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if int(lv_size) > this_lv['size']:
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extendlv_cmd = module.get_bin_path("extendlv", required=True)
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cmd = "%s %s %s %sM" % (test_opt, extendlv_cmd, lv, lv_size - this_lv['size'])
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rc, out, err = module.run_command(cmd)
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if rc == 0:
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module.exit_json(changed=True, msg="Logical volume %s size extended to %sMB." % (lv, lv_size))
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else:
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module.fail_json(msg="Unable to resize %s to %sMB." % (lv, lv_size), rc=rc, out=out, err=err)
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elif lv_size < this_lv['size']:
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module.fail_json(msg="No shrinking of Logical Volume %s permitted. Current size: %s MB" % (lv, this_lv['size']))
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else:
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module.exit_json(changed=False, msg="Logical volume %s size is already %sMB." % (lv, lv_size))
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if __name__ == '__main__':
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main()
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