From 12b10dabbcaf96af29df8799b0c62b780e4394cc Mon Sep 17 00:00:00 2001
From: Alexander Bulimov <lazywolf0@gmail.com>
Date: Mon, 11 Mar 2013 13:17:36 +0400
Subject: [PATCH] lvg module for managing LVM volume groups
---
lvg | 145 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 145 insertions(+)
create mode 100755 lvg
diff --git a/lvg b/lvg
new file mode 100755
index 00000000000..064462953bd
--- /dev/null
+++ b/lvg
@@ -0,0 +1,145 @@
+#!/usr/bin/python
+# -*- coding: utf-8 -*-
+
+# (c) 2013, Alexander Bulimov <lazywolf0@gmail.com>
+# based on lvol module by Jeroen Hoekx <jeroen.hoekx@dsquare.be>
+#
+# 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 <http://www.gnu.org/licenses/>.
+
+DOCUMENTATION = '''
+---
+author: Alexander Bulimov
+module: lvg
+short_description: Configure LVM volume groups
+description:
+ - This module creates or removes volume groups.
+version_added: "1.1"
+options:
+ vg:
+ description:
+ - The name of the volume group.
+ required: true
+ dev:
+ description:
+ - List of comma-separated devices to use in this volume group.
+ required: true
+ 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
+examples:
+ - description: Create a volume group on top of /dev/sda1.
+ code: lvg vg=vg.services dev=/dev/sda1
+ - description: Create a volume group on top of /dev/sdb1 and /dev/sdc5.
+ code: lvg vg=vg.services dev=/dev/sdb1,/dev/sdc5
+ - description: Remove a volume group with name vg.services.
+ code: lvg vg=vg.services state=absent
+notes:
+ - module does not check device list 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 main():
+ module = AnsibleModule(
+ argument_spec = dict(
+ vg=dict(required=True),
+ dev=dict(),
+ state=dict(choices=["absent", "present"], default='present'),
+ force=dict(choices=["yes", "no"], default='no'),
+ ),
+ supports_check_mode=True,
+ )
+
+ vg = module.params['vg']
+ if module.params['dev']:
+ dev = module.params['dev'].replace(',',' ')
+ dev_list = module.params['dev'].split(',')
+ state = module.params['state']
+ force = module.params['force']
+
+ if state=='present' and not dev:
+ module.fail_json(msg="No dev given.")
+
+ if state=='present':
+ for test_dev in dev_list:
+ if not os.path.exists(test_dev):
+ module.fail_json(msg="No dev %s found."%test_dev)
+
+ 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 creating volume group %s."%vg, 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:
+ rc,_,err = module.run_command("vgcreate %s %s"%(vg, dev))
+ 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 == "yes":
+ ### 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))
+
+ module.exit_json(changed=changed)
+
+# this is magic, see lib/ansible/module_common.py
+#<<INCLUDE_ANSIBLE_MODULE_COMMON>>
+main()