diff --git a/lvg b/lvg new file mode 100755 index 00000000000..08cc66865c9 --- /dev/null +++ b/lvg @@ -0,0 +1,215 @@ +#!/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: true + pesize: + description: + - The size of the physical extent in megabytes. + default: 4 + required: false + 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 or reduce volume group with logical volumes. + required: false +examples: + - description: Create a volume group on top of /dev/sda1 with physical extent size = 32MB. + code: lvg vg=vg.services pvs=/dev/sda1 pesize=32 + - description: Create a volume group on top of /dev/sdb1 and /dev/sdc5. + code: lvg vg=vg.services pvs=/dev/sdb1,/dev/sdc5 + - description: Remove a volume group with name vg.services. + code: lvg vg=vg.services state=absent +notes: + - module does not modify PE size for already present volume group +''' + +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), + 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'] + + 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 + rc,current_pvs,err = module.run_command("pvs --noheadings -o pv_name,vg_name --separator ';'") + 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'])) + + rc,current_vgs,err = module.run_command("vgs --noheadings -o vg_name,pv_count,lv_count --separator ';'") + + 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 + for current_dev in dev_list: + rc,_,err = module.run_command("pvcreate %s"%current_dev) + if rc == 0: + changed = True + else: + module.fail_json(msg="Creating physical volume '%s' failed"%current_dev, rc=rc, err=err) + rc,_,err = module.run_command("vgcreate -s %s %s %s"%(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 + rc,_,err = module.run_command("vgremove --force %s"%(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 + for current_dev in devs_to_add: + rc,_,err = module.run_command("pvcreate %s"%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 + rc,_,err = module.run_command("vgextend %s %s"%(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) + rc,_,err = module.run_command("vgreduce --force %s %s"%(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) + +# this is magic, see lib/ansible/module_common.py +#<> +main()