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235 lines
7.7 KiB
Python
235 lines
7.7 KiB
Python
#!/usr/bin/python
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# -*- coding: utf-8 -*-
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# (c) 2013, Jeroen Hoekx <jeroen.hoekx@dsquare.be>, Alexander Bulimov <lazywolf0@gmail.com>
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#
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# This file is part of Ansible
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#
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# Ansible is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# Ansible is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
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DOCUMENTATION = '''
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---
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author: Jeroen Hoekx
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module: lvol
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short_description: Configure LVM logical volumes
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description:
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- This module creates, removes or resizes logical volumes.
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version_added: "1.1"
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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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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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required: true
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size:
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description:
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- The size of the logical volume, according to lvcreate(8) --size, by
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default in megabytes or optionally with one of [bBsSkKmMgGtTpPeE] units; or
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according to lvcreate(8) --extents as a percentage of [VG|PVS|FREE];
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resizing is not supported with percentages.
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state:
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choices: [ "present", "absent" ]
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default: present
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description:
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- Control if the logical volume exists.
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required: false
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force:
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version_added: "1.5"
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choices: [ "yes", "no" ]
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default: "no"
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description:
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- Shrink or remove operations of volumes requires this switch. Ensures that
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that filesystems get never corrupted/destroyed by mistake.
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required: false
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notes:
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- Filesystems on top of the volume are not resized.
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'''
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EXAMPLES = '''
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# Create a logical volume of 512m.
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- lvol: vg=firefly lv=test size=512
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# Create a logical volume of 512g.
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- lvol: vg=firefly lv=test size=512g
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# Create a logical volume the size of all remaining space in the volume group
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- lvol: vg=firefly lv=test size=100%FREE
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# Extend the logical volume to 1024m.
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- lvol: vg=firefly lv=test size=1024
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# Reduce the logical volume to 512m
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- lvol: vg=firefly lv=test size=512 force=yes
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# Remove the logical volume.
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- lvol: vg=firefly lv=test state=absent force=yes
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'''
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import re
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decimal_point = re.compile(r"(\.|,)")
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def parse_lvs(data):
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lvs = []
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for line in data.splitlines():
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parts = line.strip().split(';')
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lvs.append({
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'name': parts[0],
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'size': int(decimal_point.split(parts[1])[0]),
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})
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return lvs
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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(required=True),
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lv=dict(required=True),
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size=dict(),
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state=dict(choices=["absent", "present"], default='present'),
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force=dict(type='bool', default='no'),
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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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size = module.params['size']
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state = module.params['state']
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force = module.boolean(module.params['force'])
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size_opt = 'L'
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size_unit = 'm'
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if size:
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# LVCREATE(8) -l --extents option with percentage
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if '%' in size:
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size_parts = size.split('%', 1)
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size_percent = int(size_parts[0])
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if size_percent > 100:
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module.fail_json(msg="Size percentage cannot be larger than 100%")
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size_whole = size_parts[1]
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if size_whole == 'ORIGIN':
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module.fail_json(msg="Snapshot Volumes are not supported")
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elif size_whole not in ['VG', 'PVS', 'FREE']:
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module.fail_json(msg="Specify extents as a percentage of VG|PVS|FREE")
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size_opt = 'l'
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size_unit = ''
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# LVCREATE(8) -L --size option unit
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elif size[-1].isalpha():
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if size[-1] in 'bBsSkKmMgGtTpPeE':
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size_unit = size[-1]
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if size[0:-1].isdigit():
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size = int(size[0:-1])
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else:
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module.fail_json(msg="Bad size specification for unit %s" % size_unit)
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size_opt = 'L'
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else:
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module.fail_json(msg="Size unit should be one of [bBsSkKmMgGtTpPeE]")
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# when no unit, megabytes by default
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elif size.isdigit():
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size = int(size)
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else:
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module.fail_json(msg="Bad size specification")
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if size_opt == 'l':
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unit = 'm'
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else:
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unit = size_unit
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rc, current_lvs, err = module.run_command(
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"lvs --noheadings -o lv_name,size --units %s --separator ';' %s" % (unit, vg))
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if rc != 0:
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if state == 'absent':
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module.exit_json(changed=False, stdout="Volume group %s does not exist." % vg, stderr=False)
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else:
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module.fail_json(msg="Volume group %s does not exist." % vg, rc=rc, err=err)
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changed = False
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lvs = parse_lvs(current_lvs)
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for test_lv in lvs:
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if test_lv['name'] == lv:
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this_lv = test_lv
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break
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else:
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this_lv = None
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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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else:
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module.exit_json(changed=False, vg=vg, lv=this_lv['name'], size=this_lv['size'])
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msg = ''
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if this_lv is None:
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if state == 'present':
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### create LV
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if module.check_mode:
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changed = True
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else:
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rc, _, err = module.run_command("lvcreate -n %s -%s %s%s %s" % (lv, size_opt, size, size_unit, vg))
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if rc == 0:
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changed = True
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else:
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module.fail_json(msg="Creating logical volume '%s' failed" % lv, rc=rc, err=err)
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else:
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if state == 'absent':
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### remove LV
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if module.check_mode:
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module.exit_json(changed=True)
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if not force:
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module.fail_json(msg="Sorry, no removal of logical volume %s without force=yes." % (this_lv['name']))
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rc, _, err = module.run_command("lvremove --force %s/%s" % (vg, this_lv['name']))
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if rc == 0:
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module.exit_json(changed=True)
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else:
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module.fail_json(msg="Failed to remove logical volume %s" % (lv), rc=rc, err=err)
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elif size_opt == 'l':
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module.exit_json(changed=False, msg="Resizing extents with percentage not supported.")
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else:
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### resize LV
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tool = None
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if size > this_lv['size']:
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tool = 'lvextend'
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elif size < this_lv['size']:
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if not force:
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module.fail_json(msg="Sorry, no shrinking of %s without force=yes." % (this_lv['name']))
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tool = 'lvreduce --force'
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if tool:
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if module.check_mode:
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changed = True
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else:
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rc, _, err = module.run_command("%s -%s %s%s %s/%s" % (tool, size_opt, size, size_unit, vg, this_lv['name']))
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if rc == 0:
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changed = True
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elif "matches existing size" in err:
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module.exit_json(changed=False, vg=vg, lv=this_lv['name'], size=this_lv['size'])
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else:
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module.fail_json(msg="Unable to resize %s to %s%s" % (lv, size, size_unit), rc=rc, err=err)
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module.exit_json(changed=changed, msg=msg)
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# import module snippets
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from ansible.module_utils.basic import *
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main()
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