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Merge pull request #1382 from Jmainguy/lvol_snapshot

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add snapshot feature to lvol
This commit is contained in:
Brian Coca 2016-01-11 19:31:04 -05:00
commit 4d2a20b2f4
1 changed files with 26 additions and 6 deletions
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32
system/lvol.py
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@ -62,6 +62,11 @@ options:
version_added: "2.0"
description:
- Free-form options to be passed to the lvcreate command
snapshot:
version_added: "2.1"
description:
- The name of the snapshot volume
required: false
notes:
- Filesystems on top of the volume are not resized.
'''
@ -87,6 +92,9 @@ EXAMPLES = '''
# Remove the logical volume.
- lvol: vg=firefly lv=test state=absent force=yes
# Create a snapshot volume of the test logical volume.
- lvol: vg=firefly lv=test snapshot=snap1 size=100m
'''
import re
@ -128,6 +136,7 @@ def main():
opts=dict(type='str'),
state=dict(choices=["absent", "present"], default='present'),
force=dict(type='bool', default='no'),
snapshot=dict(type='str', default=None),
),
supports_check_mode=True,
)
@ -150,6 +159,7 @@ def main():
force = module.boolean(module.params['force'])
size_opt = 'L'
size_unit = 'm'
snapshot = module.params['snapshot']
if opts is None:
opts = ""
@ -201,8 +211,12 @@ def main():
lvs = parse_lvs(current_lvs)
if snapshot is None:
check_lv = lv
else:
check_lv = snapshot
for test_lv in lvs:
if test_lv['name'] == lv:
if test_lv['name'] == check_lv:
this_lv = test_lv
break
else:
@ -222,7 +236,10 @@ def main():
changed = True
else:
lvcreate_cmd = module.get_bin_path("lvcreate", required=True)
cmd = "%s %s -n %s -%s %s%s %s %s" % (lvcreate_cmd, yesopt, lv, size_opt, size, size_unit, opts, vg)
if snapshot is not None:
cmd = "%s %s -%s %s%s -s -n %s %s %s/%s" % (lvcreate_cmd, yesopt, size_opt, size, size_unit, snapshot, opts, vg, lv)
else:
cmd = "%s %s -n %s -%s %s%s %s %s" % (lvcreate_cmd, yesopt, lv, size_opt, size, size_unit, opts, vg)
rc, _, err = module.run_command(cmd)
if rc == 0:
changed = True
@ -247,9 +264,9 @@ def main():
else:
### resize LV
tool = None
if size > this_lv['size']:
if int(size) > this_lv['size']:
tool = module.get_bin_path("lvextend", required=True)
elif size < this_lv['size']:
elif int(size) < this_lv['size']:
if not force:
module.fail_json(msg="Sorry, no shrinking of %s without force=yes." % (this_lv['name']))
tool = module.get_bin_path("lvreduce", required=True)
@ -259,8 +276,11 @@ def main():
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:
cmd = "%s -%s %s%s %s/%s" % (tool, size_opt, size, size_unit, vg, this_lv['name'])
rc, out, err = module.run_command(cmd)
if "Reached maximum COW size" in out:
module.fail_json(msg="Unable to resize %s to %s%s" % (lv, size, size_unit), rc=rc, err=err, out=out)
elif 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'])