Merge pull request #2212 from jhoekx/lvol-module
Add lvol module to manage logical volumes.
This commit is contained in:
Michael DeHaan
commit
5fe4bf262e
1 changed files with 151 additions and 0 deletions
151
lvol
Executable file
151
lvol
Executable file
|
|
@ -0,0 +1,151 @@
|
|||
#!/usr/bin/python
|
||||
# -*- coding: utf-8 -*-
|
||||
|
||||
# (c) 2013, Jeroen Hoekx <jeroen.hoekx@dsquare.be>
|
||||
#
|
||||
# This file is part of Ansible
|
||||
#
|
||||
# Ansible is free software: you can redistribute it and/or modify
|
||||
# it under the terms of the GNU General Public License as published by
|
||||
# the Free Software Foundation, either version 3 of the License, or
|
||||
# (at your option) any later version.
|
||||
#
|
||||
# Ansible is distributed in the hope that it will be useful,
|
||||
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
# GNU General Public License for more details.
|
||||
#
|
||||
# You should have received a copy of the GNU General Public License
|
||||
# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
|
||||
|
||||
DOCUMENTATION = '''
|
||||
---
|
||||
author: Jeroen Hoekx
|
||||
module: lvol
|
||||
short_description: Configure LVM logical volumes
|
||||
description:
|
||||
- This module creates, removes or resizes logical volumes.
|
||||
version_added: "1.1"
|
||||
options:
|
||||
vg:
|
||||
description:
|
||||
- The volume group this logical volume is part of.
|
||||
required: true
|
||||
lv:
|
||||
description:
|
||||
- The name of the logical volume.
|
||||
required: true
|
||||
size:
|
||||
description:
|
||||
- The size of the logical volume in megabytes.
|
||||
state:
|
||||
choices: [ "present", "absent" ]
|
||||
default: present
|
||||
description:
|
||||
- Control if the logical volume exists.
|
||||
required: false
|
||||
examples:
|
||||
- description: Create a logical volume of 512m.
|
||||
code: lvol vg=firefly lv=test size=512
|
||||
- description: Extend the logical volume to 1024m.
|
||||
code: lvol vg=firefly lv=test size=1024
|
||||
- description: Reduce the logical volume to 512m
|
||||
code: lvol vg=firefly lv=test size=512
|
||||
- description: Remove the logical volume.
|
||||
code: lvol vg=firefly lv=test state=absent
|
||||
notes:
|
||||
- Filesystems on top of the volume are not resized.
|
||||
'''
|
||||
|
||||
def parse_lvs(data):
|
||||
lvs = []
|
||||
for line in data.splitlines():
|
||||
parts = line.strip().split(';')
|
||||
lvs.append({
|
||||
'name': parts[0],
|
||||
'size': int(parts[1].split('.')[0]),
|
||||
'path': parts[2],
|
||||
})
|
||||
return lvs
|
||||
|
||||
def main():
|
||||
module = AnsibleModule(
|
||||
argument_spec = dict(
|
||||
vg=dict(required=True),
|
||||
lv=dict(required=True),
|
||||
size=dict(),
|
||||
state=dict(choices=["absent", "present"], default='present'),
|
||||
),
|
||||
supports_check_mode=True,
|
||||
)
|
||||
|
||||
vg = module.params['vg']
|
||||
lv = module.params['lv']
|
||||
size = module.params['size']
|
||||
state = module.params['state']
|
||||
|
||||
if state=='present' and not size:
|
||||
module.fail_json(msg="No size given.")
|
||||
|
||||
if size:
|
||||
size = int(size)
|
||||
|
||||
rc,current_lvs,err = module.run_command("lvs --noheadings -o lv_name,size,lv_path --units m --separator ';' %s"%(vg))
|
||||
|
||||
if rc != 0:
|
||||
module.fail_json(msg="Volume group %s does not exist."%vg, rc=rc, err=err)
|
||||
|
||||
changed = False
|
||||
|
||||
lvs = parse_lvs(current_lvs)
|
||||
|
||||
for test_lv in lvs:
|
||||
if test_lv['name'] == lv:
|
||||
this_lv = test_lv
|
||||
break
|
||||
else:
|
||||
this_lv = None
|
||||
|
||||
if this_lv is None:
|
||||
if state == 'present':
|
||||
### create LV
|
||||
if module.check_mode:
|
||||
changed = True
|
||||
else:
|
||||
rc,_,err = module.run_command("lvcreate -n %s -L %sm %s"%(lv, size, vg))
|
||||
if rc == 0:
|
||||
changed = True
|
||||
else:
|
||||
module.fail_json(msg="Creating logical volume '%s' failed"%(lv), rc=rc, err=err)
|
||||
else:
|
||||
if state == 'absent':
|
||||
### remove LV
|
||||
if module.check_mode:
|
||||
module.exit_json(changed=True)
|
||||
rc,_,err = module.run_command("lvremove --force %s"%(this_lv['path']))
|
||||
if rc == 0:
|
||||
module.exit_json(changed=True)
|
||||
else:
|
||||
module.fail_json(msg="Failed to remove logical volume %s"%(lv),rc=rc, err=err)
|
||||
### resize LV
|
||||
tool = None
|
||||
if size > this_lv['size']:
|
||||
tool = 'lvextend'
|
||||
elif size < this_lv['size']:
|
||||
tool = 'lvreduce --force'
|
||||
|
||||
if tool:
|
||||
if module.check_mode:
|
||||
changed = True
|
||||
else:
|
||||
rc,_,err = module.run_command("%s -L %sm %s"%(tool, size, this_lv['path']))
|
||||
if rc == 0:
|
||||
changed = True
|
||||
else:
|
||||
module.fail_json(msg="Unable to resize %s to %sm."%(lv,size),rc=rc,err=err)
|
||||
|
||||
module.exit_json(changed=changed)
|
||||
|
||||
# this is magic, see lib/ansible/module_common.py
|
||||
#<<INCLUDE_ANSIBLE_MODULE_COMMON>>
|
||||
main()
|
||||
Loading…
Reference in a new issue