#!/usr/bin/python # -*- coding: utf-8 -*- # (c) 2013, Alexander Bulimov # based on lvol module by Jeroen Hoekx # # 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: Alexander Bulimov module: lvg short_description: Configure LVM volume groups description: - This module creates, removes or resizes volume groups. version_added: "1.1" options: vg: description: - The name of the volume group. required: true pvs: description: - List of comma-separated devices to use as physical devices in this volume group. Required when creating or resizing volume group. required: false pesize: description: - The size of the physical extent in megabytes. Must be a power of 2. default: 4 required: false vgoptions: description: - Additional options to pass to C(vgcreate) when creating the volume group. default: null required: false version_added: "1.5" state: choices: [ "present", "absent" ] default: present description: - Control if the volume group exists. required: false force: choices: [ "yes", "no" ] default: "no" description: - If yes, allows to remove volume group with logical volumes. required: false notes: - module does not modify PE size for already present volume group ''' EXAMPLES = ''' # Create a volume group on top of /dev/sda1 with physical extent size = 32MB. - lvg: vg=vg.services pvs=/dev/sda1 pesize=32 # Create or resize a volume group on top of /dev/sdb1 and /dev/sdc5. # If, for example, we already have VG vg.services on top of /dev/sdb1, # this VG will be extended by /dev/sdc5. Or if vg.services was created on # top of /dev/sda5, we first extend it with /dev/sdb1 and /dev/sdc5, # and then reduce by /dev/sda5. - lvg: vg=vg.services pvs=/dev/sdb1,/dev/sdc5 # Remove a volume group with name vg.services. - lvg: vg=vg.services state=absent ''' def parse_vgs(data): vgs = [] for line in data.splitlines(): parts = line.strip().split(';') vgs.append({ 'name': parts[0], 'pv_count': int(parts[1]), 'lv_count': int(parts[2]), }) return vgs def parse_pvs(data): pvs = [] for line in data.splitlines(): parts = line.strip().split(';') pvs.append({ 'name': parts[0], 'vg_name': parts[1], }) return pvs def main(): module = AnsibleModule( argument_spec = dict( vg=dict(required=True), pvs=dict(type='list'), pesize=dict(type='int', default=4), vgoptions=dict(), state=dict(choices=["absent", "present"], default='present'), force=dict(type='bool', default='no'), ), supports_check_mode=True, ) vg = module.params['vg'] state = module.params['state'] force = module.boolean(module.params['force']) pesize = module.params['pesize'] vgoptions = module.params.get('vgoptions', '').split() if module.params['pvs']: dev_string = ' '.join(module.params['pvs']) dev_list = module.params['pvs'] elif state == 'present': module.fail_json(msg="No physical volumes given.") if state=='present': ### check given devices for test_dev in dev_list: if not os.path.exists(test_dev): module.fail_json(msg="Device %s not found."%test_dev) ### get pv list pvs_cmd = module.get_bin_path('pvs', True) rc,current_pvs,err = module.run_command("%s --noheadings -o pv_name,vg_name --separator ';'" % pvs_cmd) if rc != 0: module.fail_json(msg="Failed executing pvs command.",rc=rc, err=err) ### check pv for devices pvs = parse_pvs(current_pvs) used_pvs = [ pv for pv in pvs if pv['name'] in dev_list and pv['vg_name'] and pv['vg_name'] != vg ] if used_pvs: module.fail_json(msg="Device %s is already in %s volume group."%(used_pvs[0]['name'],used_pvs[0]['vg_name'])) vgs_cmd = module.get_bin_path('vgs', True) rc,current_vgs,err = module.run_command("%s --noheadings -o vg_name,pv_count,lv_count --separator ';'" % vgs_cmd) if rc != 0: module.fail_json(msg="Failed executing vgs command.",rc=rc, err=err) changed = False vgs = parse_vgs(current_vgs) for test_vg in vgs: if test_vg['name'] == vg: this_vg = test_vg break else: this_vg = None if this_vg is None: if state == 'present': ### create VG if module.check_mode: changed = True else: ### create PV pvcreate_cmd = module.get_bin_path('pvcreate', True) for current_dev in dev_list: rc,_,err = module.run_command("%s %s" % (pvcreate_cmd,current_dev)) if rc == 0: changed = True else: module.fail_json(msg="Creating physical volume '%s' failed" % current_dev, rc=rc, err=err) vgcreate_cmd = module.get_bin_path('vgcreate') rc,_,err = module.run_command([vgcreate_cmd] + vgoptions + ['-s', str(pesize), vg, dev_string]) if rc == 0: changed = True else: module.fail_json(msg="Creating volume group '%s' failed"%vg, rc=rc, err=err) else: if state == 'absent': if module.check_mode: module.exit_json(changed=True) else: if this_vg['lv_count'] == 0 or force: ### remove VG vgremove_cmd = module.get_bin_path('vgremove', True) rc,_,err = module.run_command("%s --force %s" % (vgremove_cmd, vg)) if rc == 0: module.exit_json(changed=True) else: module.fail_json(msg="Failed to remove volume group %s"%(vg),rc=rc, err=err) else: module.fail_json(msg="Refuse to remove non-empty volume group %s without force=yes"%(vg)) ### resize VG current_devs = [ pv['name'] for pv in pvs if pv['vg_name'] == vg ] devs_to_remove = list(set(current_devs) - set(dev_list)) devs_to_add = list(set(dev_list) - set(current_devs)) if devs_to_add or devs_to_remove: if module.check_mode: changed = True else: if devs_to_add: devs_to_add_string = ' '.join(devs_to_add) ### create PV pvcreate_cmd = module.get_bin_path('pvcreate', True) for current_dev in devs_to_add: rc,_,err = module.run_command("%s %s" % (pvcreate_cmd, current_dev)) if rc == 0: changed = True else: module.fail_json(msg="Creating physical volume '%s' failed"%current_dev, rc=rc, err=err) ### add PV to our VG vgextend_cmd = module.get_bin_path('vgextend', True) rc,_,err = module.run_command("%s %s %s" % (vgextend_cmd, vg, devs_to_add_string)) if rc == 0: changed = True else: module.fail_json(msg="Unable to extend %s by %s."%(vg, devs_to_add_string),rc=rc,err=err) ### remove some PV from our VG if devs_to_remove: devs_to_remove_string = ' '.join(devs_to_remove) vgreduce_cmd = module.get_bin_path('vgreduce', True) rc,_,err = module.run_command("%s --force %s %s" % (vgreduce_cmd, vg, devs_to_remove_string)) if rc == 0: changed = True else: module.fail_json(msg="Unable to reduce %s by %s."%(vg, devs_to_remove_string),rc=rc,err=err) module.exit_json(changed=changed) # import module snippets from ansible.module_utils.basic import * main()