#!/usr/bin/python # -*- coding: utf-8 -*- # (c) 2013, Jeroen Hoekx , Alexander Bulimov # # 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 . 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, according to lvcreate(8) --size, by default in megabytes or optionally with one of [bBsSkKmMgGtTpPeE] units; or according to lvcreate(8) --extents as a percentage of [VG|PVS|FREE]; resizing is not supported with percentages. state: choices: [ "present", "absent" ] default: present description: - Control if the logical volume exists. required: false notes: - Filesystems on top of the volume are not resized. ''' EXAMPLES = ''' # Create a logical volume of 512m. - lvol: vg=firefly lv=test size=512 # Create a logical volume of 512g. - lvol: vg=firefly lv=test size=512g # Create a logical volume the size of all remaining space in the volume group - lvol: vg=firefly lv=test size=100%FREE # Extend the logical volume to 1024m. - lvol: vg=firefly lv=test size=1024 # Reduce the logical volume to 512m - lvol: vg=firefly lv=test size=512 # Remove the logical volume. - lvol: vg=firefly lv=test state=absent ''' import re decimal_point = re.compile(r"(\.|,)") def parse_lvs(data): lvs = [] for line in data.splitlines(): parts = line.strip().split(';') lvs.append({ 'name': parts[0], 'size': int(decimal_point.split(parts[1])[0]), }) 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'] size_opt = 'L' size_unit = 'm' if size: # LVCREATE(8) -l --extents option with percentage if '%' in size: size_parts = size.split('%', 1) size_percent = int(size_parts[0]) if size_percent > 100: module.fail_json(msg="Size percentage cannot be larger than 100%") size_whole = size_parts[1] if size_whole == 'ORIGIN': module.fail_json(msg="Snapshot Volumes are not supported") elif size_whole not in ['VG', 'PVS', 'FREE']: module.fail_json(msg="Specify extents as a percentage of VG|PVS|FREE") size_opt = 'l' size_unit = '' # LVCREATE(8) -L --size option unit elif size[-1].isalpha(): if size[-1] in 'bBsSkKmMgGtTpPeE': size_unit = size[-1] if size[0:-1].isdigit(): size = int(size[0:-1]) else: module.fail_json(msg="Bad size specification for unit %s" % size_unit) size_opt = 'L' else: module.fail_json(msg="Size unit should be one of [bBsSkKmMgGtTpPeE]") # when no unit, megabytes by default elif size.isdigit(): size = int(size) else: module.fail_json(msg="Bad size specification") if size_opt == 'l': unit = 'm' else: unit = size_unit rc, current_lvs, err = module.run_command( "lvs --noheadings -o lv_name,size --units %s --separator ';' %s" % (unit, vg)) if rc != 0: if state == 'absent': module.exit_json(changed=False, stdout="Volume group %s does not exist." % vg, stderr=False) else: 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 state == 'present' and not size: if this_lv is None: module.fail_json(msg="No size given.") else: module.exit_json(changed=False, vg=vg, lv=this_lv['name'], size=this_lv['size']) msg = '' 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 -%s %s%s %s" % (lv, size_opt, size, size_unit, 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/%s" % (vg, this_lv['name'])) if rc == 0: module.exit_json(changed=True) else: module.fail_json(msg="Failed to remove logical volume %s" % (lv), rc=rc, err=err) elif size_opt == 'l': module.exit_json(changed=False, msg="Resizing extents with percentage not supported.") else: ### 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 -%s %s%s %s/%s" % (tool, size_opt, size, size_unit, vg, this_lv['name'])) if rc == 0: changed = True elif "matches existing size" in err: module.exit_json(changed=False, vg=vg, lv=this_lv['name'], size=this_lv['size']) else: module.fail_json(msg="Unable to resize %s to %s%s" % (lv, size, size_unit), rc=rc, err=err) module.exit_json(changed=changed, msg=msg) # import module snippets from ansible.module_utils.basic import * main()