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2dfee9d0a7
When no vg_options are passed to the module, 'vg_options' still exists in the module.params dict with a value of None, so the default empty string in the get method is never used. None cannot be "splitted", which backtraced.
241 lines
8.7 KiB
Python
241 lines
8.7 KiB
Python
#!/usr/bin/python
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# -*- coding: utf-8 -*-
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# (c) 2013, Alexander Bulimov <lazywolf0@gmail.com>
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# based on lvol module by Jeroen Hoekx <jeroen.hoekx@dsquare.be>
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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: Alexander Bulimov
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module: lvg
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short_description: Configure LVM volume groups
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description:
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- This module creates, removes or resizes volume groups.
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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 name of the volume group.
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required: true
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pvs:
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description:
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- List of comma-separated devices to use as physical devices in this volume group. Required when creating or resizing volume group.
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required: false
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pesize:
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description:
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- The size of the physical extent in megabytes. Must be a power of 2.
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default: 4
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required: false
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vg_options:
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description:
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- Additional options to pass to C(vgcreate) when creating the volume group.
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default: null
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required: false
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version_added: "1.6"
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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 volume group exists.
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required: false
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force:
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choices: [ "yes", "no" ]
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default: "no"
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description:
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- If yes, allows to remove volume group with logical volumes.
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required: false
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notes:
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- module does not modify PE size for already present volume group
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'''
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EXAMPLES = '''
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# Create a volume group on top of /dev/sda1 with physical extent size = 32MB.
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- lvg: vg=vg.services pvs=/dev/sda1 pesize=32
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# Create or resize a volume group on top of /dev/sdb1 and /dev/sdc5.
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# If, for example, we already have VG vg.services on top of /dev/sdb1,
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# this VG will be extended by /dev/sdc5. Or if vg.services was created on
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# top of /dev/sda5, we first extend it with /dev/sdb1 and /dev/sdc5,
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# and then reduce by /dev/sda5.
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- lvg: vg=vg.services pvs=/dev/sdb1,/dev/sdc5
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# Remove a volume group with name vg.services.
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- lvg: vg=vg.services state=absent
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'''
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def parse_vgs(data):
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vgs = []
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for line in data.splitlines():
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parts = line.strip().split(';')
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vgs.append({
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'name': parts[0],
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'pv_count': int(parts[1]),
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'lv_count': int(parts[2]),
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})
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return vgs
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def parse_pvs(data):
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pvs = []
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for line in data.splitlines():
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parts = line.strip().split(';')
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pvs.append({
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'name': parts[0],
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'vg_name': parts[1],
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})
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return pvs
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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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pvs=dict(type='list'),
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pesize=dict(type='int', default=4),
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vg_options=dict(default=''),
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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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state = module.params['state']
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force = module.boolean(module.params['force'])
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pesize = module.params['pesize']
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vgoptions = module.params['vg_options'].split()
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if module.params['pvs']:
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dev_string = ' '.join(module.params['pvs'])
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dev_list = module.params['pvs']
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elif state == 'present':
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module.fail_json(msg="No physical volumes given.")
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if state=='present':
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### check given devices
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for test_dev in dev_list:
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if not os.path.exists(test_dev):
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module.fail_json(msg="Device %s not found."%test_dev)
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### get pv list
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pvs_cmd = module.get_bin_path('pvs', True)
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rc,current_pvs,err = module.run_command("%s --noheadings -o pv_name,vg_name --separator ';'" % pvs_cmd)
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if rc != 0:
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module.fail_json(msg="Failed executing pvs command.",rc=rc, err=err)
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### check pv for devices
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pvs = parse_pvs(current_pvs)
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used_pvs = [ pv for pv in pvs if pv['name'] in dev_list and pv['vg_name'] and pv['vg_name'] != vg ]
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if used_pvs:
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module.fail_json(msg="Device %s is already in %s volume group."%(used_pvs[0]['name'],used_pvs[0]['vg_name']))
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vgs_cmd = module.get_bin_path('vgs', True)
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rc,current_vgs,err = module.run_command("%s --noheadings -o vg_name,pv_count,lv_count --separator ';'" % vgs_cmd)
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if rc != 0:
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module.fail_json(msg="Failed executing vgs command.",rc=rc, err=err)
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changed = False
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vgs = parse_vgs(current_vgs)
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for test_vg in vgs:
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if test_vg['name'] == vg:
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this_vg = test_vg
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break
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else:
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this_vg = None
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if this_vg is None:
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if state == 'present':
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### create VG
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if module.check_mode:
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changed = True
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else:
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### create PV
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pvcreate_cmd = module.get_bin_path('pvcreate', True)
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for current_dev in dev_list:
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rc,_,err = module.run_command("%s %s" % (pvcreate_cmd,current_dev))
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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 physical volume '%s' failed" % current_dev, rc=rc, err=err)
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vgcreate_cmd = module.get_bin_path('vgcreate')
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rc,_,err = module.run_command([vgcreate_cmd] + vgoptions + ['-s', str(pesize), vg, dev_string])
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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 volume group '%s' failed"%vg, rc=rc, err=err)
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else:
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if state == 'absent':
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if module.check_mode:
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module.exit_json(changed=True)
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else:
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if this_vg['lv_count'] == 0 or force:
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### remove VG
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vgremove_cmd = module.get_bin_path('vgremove', True)
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rc,_,err = module.run_command("%s --force %s" % (vgremove_cmd, vg))
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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 volume group %s"%(vg),rc=rc, err=err)
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else:
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module.fail_json(msg="Refuse to remove non-empty volume group %s without force=yes"%(vg))
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### resize VG
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current_devs = [ pv['name'] for pv in pvs if pv['vg_name'] == vg ]
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devs_to_remove = list(set(current_devs) - set(dev_list))
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devs_to_add = list(set(dev_list) - set(current_devs))
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if devs_to_add or devs_to_remove:
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if module.check_mode:
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changed = True
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else:
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if devs_to_add:
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devs_to_add_string = ' '.join(devs_to_add)
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### create PV
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pvcreate_cmd = module.get_bin_path('pvcreate', True)
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for current_dev in devs_to_add:
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rc,_,err = module.run_command("%s %s" % (pvcreate_cmd, current_dev))
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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 physical volume '%s' failed"%current_dev, rc=rc, err=err)
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### add PV to our VG
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vgextend_cmd = module.get_bin_path('vgextend', True)
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rc,_,err = module.run_command("%s %s %s" % (vgextend_cmd, vg, devs_to_add_string))
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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="Unable to extend %s by %s."%(vg, devs_to_add_string),rc=rc,err=err)
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### remove some PV from our VG
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if devs_to_remove:
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devs_to_remove_string = ' '.join(devs_to_remove)
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vgreduce_cmd = module.get_bin_path('vgreduce', True)
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rc,_,err = module.run_command("%s --force %s %s" % (vgreduce_cmd, vg, devs_to_remove_string))
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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="Unable to reduce %s by %s."%(vg, devs_to_remove_string),rc=rc,err=err)
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module.exit_json(changed=changed)
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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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