From e3ca2c7aebe1835571db58b131dc983c7f3ca575 Mon Sep 17 00:00:00 2001 From: Pavol Ipoth Date: Fri, 15 Apr 2016 21:14:21 +0200 Subject: [PATCH] Adding new ansible module lvol_cache --- system/lvol_cache.py | 793 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 793 insertions(+) create mode 100644 system/lvol_cache.py diff --git a/system/lvol_cache.py b/system/lvol_cache.py new file mode 100644 index 00000000000..dd3f7ec2d18 --- /dev/null +++ b/system/lvol_cache.py @@ -0,0 +1,793 @@ +#!/usr/bin/python +# -*- coding: utf-8 -*- + +# (c) 2016, Pavol Ipoth +# +# 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: + - "Pavol Ipoth " +module: lvol_cache +short_description: Configure Cache LVM logical volumes +description: + - This module creates, removes or resizes, converts cache logical volumes. +options: + vg: + description: + - The volume group this logical volume is part of. + required: true + lv: + description: + - The name of the logical volume. + required: true + size: + description: + - The size of the logical volume, by + default in megabytes or optionally with one of [bBsSkKmMgGtTpPeE] units; or + as a percentage of [VG|PVS|FREE]; +size is not implemented, as it is by + design not indempodent + Float values must begin with a digit. + state: + choices: [ "present", "absent" ] + default: present + description: + - Control if the logical volume exists. If C(present) the C(size) option + is required. + required: false + force: + choices: [ "yes", "no" ] + default: "no" + description: + - Shrink/extend/remove/conversion operations of volumes requires this switch. Ensures that + that filesystems get never corrupted/destroyed by mistake. + required: false + opts: + description: + - Free-form options to be passed to the lvcreate command + pvs: + description: + - Comma separated list of physical volumes /dev/sda,/dev/sdc + type: + choices: ["cache", "cache-pool", "normal"] + default: normal + description: + - Type of logical volume, cache is cached lvol, cache-pool is cache pool + supplying cached lvol, normal is lvol without any type. To create cache + lvol, cache pool must already exist + mode: + choices: ["writeback", "writethrough"] + default: writethrough + - This value is used when type is cache pool, specifies how data + are written to the lvol + pool: + description: + - This value is used when type is cache, specifies which cache pool will + be caching data for cache lvol. Must be in format vg/lv. Cache pool lvol + and cache lvol must be from same vg (this is restriction of lvm2). +notes: + - Filesystems on top of the volume are not resized. +''' + +EXAMPLES = ''' +# Create a logical volume of 512m. +- lvol: vg=firefly lv=test size=512m + +# Create a logical volume of 512g. +- lvol: vg=firefly lv=test size=512g + +# Create a logical volume the size of all remaining space in the volume group +- lvol: vg=firefly lv=test size=100%FREE + +# Create a logical volume with special options +- lvol: vg=firefly lv=test size=512g opts="-r 16" + +# Extend the logical volume to 1024m. +- lvol: vg=firefly lv=test size=1024m + +# Extend the logical volume to take all remaining space of the PVs +- lvol: vg=firefly lv=test size=100%PVS + +# Resize the logical volume to % of VG +- lvol: vg=firefly lv=test size=80%VG force=yes + +# Reduce the logical volume to 512m +- lvol: vg=firefly lv=test size=512m force=yes + +# Remove the logical volume. +- lvol: vg=firefly lv=test state=absent force=yes + +# Create cache pool logical volume of 512m. +- lvol: vg=firefly lv=testpool size=512m type=cache-pool + +# Create cache lvol testcached with cache pool firefly/testpool, +# cache pool must already exist +- lvol: vg=firefly lv=testcached size=1g type=cache pool=firefly/testpool + +# Extend cache pool to 2g, force must be yes +- lvol: vg=firefly lv=testpool size=2g type=cache-pool force=yes + +# Extend cache lvol to 5g, force must be yes +- lvol: vg=firefly lv=testcached size=5g type=cache pool=firefly/testpool force=yes + +# Convert cache lvol to normal lvol +- lvol: vg=firefly lv=testcached size=5g type=normal force=yes + +# Convert normal lvol to cache pool +- lvol: vg=firefly lv=testcached size=5g type=cache-pool force=yes + +# Convert cache pool lvol to cache lvol, you should notice that firefly/testpool +# still exists +- lvol: vg=firefly lv=testcached size=5g type=cache pool=firefly/testpool force=yes + +# Remove cache pool lvol, this also changes cache lvol to normal +- lvol: vg=firefly lv=testpool size=2g type=cache-pool state=absent force=yes +''' + +import re +# import module snippets +from ansible.module_utils.basic import * + +decimal_point = re.compile(r"(\d+\.?\d+)") + +class Vg(object): + + name = '' + size = None + unit = 'm' + free = None + vg_extent_size = None + module = None + + def __init__(self, module, vg_name, unit): + self.module = module + vg_info = self.get_vg_info(vg_name, unit) + + self.name = vg_info['name'] + self.size = vg_info['size'] + self.unit = unit + self.free = vg_info['free'] + self.vg_extent_size = vg_info['vg_extent_size'] + + def get_vg_info(self, vg_name, unit): + vgs_cmd = self.module.get_bin_path("vgs", required=True) + cmd = "%s --noheadings -o vg_name,size,free,vg_extent_size --units %s --separator ';' %s" % (vgs_cmd, unit, vg_name) + + rc, current_vgs, err = self.module.run_command(cmd) + + if rc != 0: + self.module.fail_json(msg="Volume group %s does not exist." % vg_name, rc=rc, err=err) + + parts = current_vgs.strip().split(';') + + return { + 'name': parts[0], + 'size': float(decimal_point.match(parts[1]).group(1)), + 'free': float(decimal_point.match(parts[2]).group(1)), + 'vg_extent_size': float(decimal_point.match(parts[3]).group(1)) + } + +class Lvol(object): + + name = '' + size = None + unit = 'm' + pool_lv = '' + vg = None + yes_opt = "" + cachemode = "" + module = None + + def __init__(self, module, vg_name, lv_name, unit): + self.vg = Vg(module, vg_name, unit) + self.module = module + + lv_info = self.get_lv_info(vg_name, lv_name, unit) + + self.name = lv_info['name'] + self.pool_lv = lv_info['pool_lv'] + self.size = lv_info['size'] + self.cachemode = lv_info['cachemode'] + self.unit = unit + + self.yes_opt = self.get_yes_opt(module) + + @classmethod + def exists(cls, module, vg_name, lv_name): + exists = False + lvs_cmd = module.get_bin_path("lvs", required=True) + + rc, current_lv, err = module.run_command( + "%s -a %s/%s" % (lvs_cmd, vg_name, lv_name) + ) + + if rc == 0: + exists = True + elif rc == 5 and "Failed to find logical volume" in err: + exists = False + else: + module.fail_json(msg="Unexpected error", rc=rc, err=err) + + return exists + + @classmethod + def is_cache_pool(cls, module, vg_name, lv_name): + is_cache_pool = False + lvs_cmd = module.get_bin_path("lvs", required=True) + + rc, current_lv, err = module.run_command( + "%s -a --noheadings --nosuffix -o lv_layout --separator ';' %s/%s" % (lvs_cmd, vg_name, lv_name) + ) + + if rc != 0: + module.fail_json(msg="Error", rc=rc, err=err) + + parts = current_lv.strip().split(';') + + if 'cache,pool' in parts[0]: + is_cache_pool = True + + return is_cache_pool + + @classmethod + def is_cache_lv(cls, module, vg_name, lv_name): + is_cache_lv = False + lvs_cmd = module.get_bin_path("lvs", required=True) + + rc, current_lv, err = module.run_command( + "%s -a --noheadings --nosuffix -o lv_layout --separator ';' %s/%s" % (lvs_cmd, vg_name, lv_name) + ) + + if rc != 0: + module.fail_json(msg="Error", rc=rc, err=err) + + parts = current_lv.strip().split(';') + + if 'cache' in parts[0] and 'pool' not in parts[0]: + is_cache_lv = True + + return is_cache_lv + + @classmethod + def mkversion(cls, major, minor, patch): + return (1000 * 1000 * int(major)) + (1000 * int(minor)) + int(patch) + + @classmethod + def get_lvm_version(cls, module): + ver_cmd = module.get_bin_path("lvm", required=True) + rc, out, err = module.run_command("%s version" % (ver_cmd)) + + if rc != 0: + return None + + m = re.search("LVM version:\s+(\d+)\.(\d+)\.(\d+).*(\d{4}-\d{2}-\d{2})", out) + + if not m: + return None + + return cls.mkversion(m.group(1), m.group(2), m.group(3)) + + def get_lv_info(self, vg_name, lv_name, unit): + lvs_cmd = self.module.get_bin_path("lvs", required=True) + + rc, current_lvs, err = self.module.run_command( + "%s -a --noheadings --nosuffix -o lv_name,size,pool_lv,cachemode --units %s --separator ';' %s/%s" % (lvs_cmd, unit, vg_name, lv_name) + ) + + if rc != 0: + self.module.fail_json(msg="Volume group or lvol does not exist." % vg_name, rc=rc, err=err) + + parts = current_lvs.strip().split(';') + + return { + 'name': parts[0].replace('[','').replace(']',''), + 'size': float(decimal_point.match(parts[1]).group(1)), + 'pool_lv': parts[2].replace('[','').replace(']',''), + 'cachemode': parts[3] + } + + @classmethod + def get_yes_opt(cls, module): + # Determine if the "--yes" option should be used + version_found = cls.get_lvm_version(module) + + if version_found == None: + module.fail_json(msg="Failed to get LVM version number") + + version_yesopt = cls.mkversion(2, 2, 99) # First LVM with the "--yes" option + + if version_found >= version_yesopt: + yesopt = "--yes" + else: + yesopt = "" + + return yesopt + + @classmethod + def get_size_opt(cls, requested_size): + if '%' in requested_size: + return 'l' + else: + return 'L' + + @classmethod + def calculate_size(cls, vg_free, vg_size, lv_size, size): + if '%' in size: + parts = size.split('%', 1) + size_percent = parts[0] + + size_whole = parts[1] + + if size_whole == 'VG' or size_whole == 'PVS': + size_requested = float(size_percent) * float(vg_size) / 100 + else: # size_whole == 'FREE': + size_requested = float(size_percent) * float(vg_free) / 100 + + if '+' in size: + size_requested += float(lv_size) + else: + size_requested = float(size[0:-1]) + + if '+' in size: + size_requested += float(lv_size) + + return size_requested + + @classmethod + def create_lv(cls, module, requested_size, unit, opts, vg_name, lv_name, pvs): + yes_opt = cls.get_yes_opt(module) + + lvcreate_cmd = module.get_bin_path("lvcreate", required=True) + + cmd = "%s %s -n %s -L %s%s %s %s %s" % (lvcreate_cmd, yes_opt, lv_name, requested_size, unit, opts, vg_name, pvs) + + rc, _, err = module.run_command(cmd) + + if rc != 0: + module.fail_json(msg="Creating logical volume '%s' failed" % lv_name, rc=rc, err=err) + + @classmethod + def delete_lv(cls, module, force, vg_name, lv_name): + if not force: + module.fail_json(msg="Sorry, no removal of logical volume %s without force=yes." % (lv_name)) + + lvremove_cmd = module.get_bin_path("lvremove", required=True) + rc, _, err = module.run_command("%s --force %s/%s" % (lvremove_cmd, vg_name, lv_name)) + + if rc !=0 : + module.fail_json(msg="Failed to remove logical volume %s/%s" % (vg_name, lv_name), rc=rc, err=err) + + def resize_common(self, tool, requested_size, pvs): + cmd = "%s -L %s%s %s/%s %s" % (tool, requested_size, self.unit, self.vg.name, self.name, pvs) + + rc, out, err = self.module.run_command(cmd) + + if rc != 0: + if "Reached maximum COW size" in out: + self.module.fail_json(msg="Unable to resize %s to %s%s" % (self.name, requested_size, self.unit), rc=rc, err=err, out=out) + elif "matches existing size" in err: + self.module.exit_json(changed=False, vg=self.vg.name, lv=self.name, size=self.size) + else: + self.module.fail_json(msg="Unable to resize %s to %s%s" % (self.name, requested_size, self.unit), rc=rc, err=err) + + def shrink_lv(self, force, requested_size, pvs): + if requested_size == 0: + self.module.fail_json(msg="Sorry, no shrinking of %s to 0 permitted." % (self.name)) + elif not force: + self.module.fail_json(msg="Sorry, no shrinking of %s without force=yes" % (self.name)) + else: + tool = self.module.get_bin_path("lvreduce", required=True) + tool = '%s %s' % (tool, '--force') + + self.resize_common(tool, requested_size, pvs) + + def extend_lv(self, requested_size, pvs): + if (self.vg.free > 0) and self.vg.free >= (requested_size - self.size): + tool = self.module.get_bin_path("lvextend", required=True) + else: + self.module.fail_json( + msg="Logical Volume %s could not be extended. Not enough free space left (%s%s required / %s%s available)" + % (self.name, (requested_size - self.size), self.unit, self.vg.free, self.unit) + ) + + self.resize_common(tool, requested_size, pvs) + + def resize_lv(self, force, requested_size, pvs): + if self.size < requested_size: + self.extend_lv(requested_size, pvs) + elif self.size > requested_size + self.vg.vg_extent_size: # more than an extent too large + self.shrink_lv(force, requested_size, pvs) + + self.__init__(self.module, self.vg.name, self.name, self.unit) + + def convert_to_cache(self, pool): + lvconvert_cmd = self.module.get_bin_path("lvconvert", required=True) + + rc, out, err = self.module.run_command( + "%s --type cache --cachepool %s %s/%s" % (lvconvert_cmd, pool, self.vg.name, self.name) + ) + + if rc != 0: + self.module.fail_json(msg="Converting logical volume to cache LV '%s' failed" % self.name, rc=rc, err=err) + + return CacheLvol(self.module, self.vg.name, self.name, self.unit) + + def convert_to_cache_pool(self, force, mode): + lvconvert_cmd = self.module.get_bin_path("lvconvert", required=True) + yes_opt = self.get_yes_opt(self.module) + + if not force: + self.module.fail_json(msg="Sorry, no conversion of %s to cache-pool without force=yes." % (self.name)) + + rc, out, err = self.module.run_command( + "%s %s --type cache-pool --cachemode %s %s/%s" % (lvconvert_cmd, yes_opt, mode, self.vg.name, self.name) + ) + + if rc != 0: + self.module.fail_json(msg="Converting logical volume to cache pool '%s' failed" % self.name, rc=rc, err=err) + + return CachePoolLvol(self.module, self.vg.name, self.name, self.unit) + +class CachePoolLvol(Lvol): + + @classmethod + def create_lv(cls, module, requested_size, unit, opts, vg_name, lv_name, pvs, mode): + opts += " --type cache-pool --cachemode %s" % (mode) + super(CachePoolLvol, cls).create_lv(module, requested_size, unit, opts, vg_name, lv_name, pvs) + + def get_cache_lvol_name(self): + cache_lvol_info = None + lvs_cmd = self.module.get_bin_path("lvs", required=True) + + rc, current_lvs, err = self.module.run_command( + "%s -a --noheadings --nosuffix -o lv_name,size,pool_lv --units %s --separator ';' %s" % (lvs_cmd, self.unit, self.vg.name)) + + if rc != 0: + if state == 'absent': + self.module.exit_json(changed=False, stdout="Volume group %s does not exist." % self.vg.name, stderr=False) + else: + self.module.fail_json(msg="Volume group %s does not exist." % self.vg.name, rc=rc, err=err) + + for line in current_lvs.splitlines(): + parts = line.strip().split(';') + pool = parts[2].replace('[','').replace(']','') + + if pool == self.name: + cache_lvol_info = parts[0].replace('[','').replace(']','') + + return cache_lvol_info + + def resize_lv(self, force, requested_size, pvs): + parent_cache_lvol_name = self.get_cache_lvol_name() + + self.delete_lv(self.module, force, self.vg.name, self.name) + self.create_lv(self.module, requested_size, self.unit, '', self.vg.name, self.name, pvs, self.cachemode) + + if parent_cache_lvol_name is not None: + parent_cache_lvol = Lvol(self.module, self.vg.name, parent_cache_lvol_name, self.unit) + parent_cache_lvol.convert_to_cache("%s/%s" % (self.vg.name, self.name)) + + self.__init__(self.module, self.vg.name, self.name, self.unit) + + def convert_to_cache(self, force, opts, pvs, pool): + self.delete_lv(self.module, force, self.vg.name, self.name) + CacheLvol.create_lv(self.module, self.size, self.unit, opts, self.vg.name, self.name, pvs, pool) + + return CacheLvol(self.module, self.vg.name, self.name, self.unit) + + def convert_to_normal(self, force, opts, pvs): + self.delete_lv(self.module, force, self.vg.name, self.name) + Lvol.create_lv(self.module, self.size, self.unit, opts, self.vg.name, self.name, pvs) + + return Lvol(self.module, self.vg.name, self.name, self.unit) + + def change_mode(self, force, opts, pvs, mode): + cache_lvol_name = self.get_cache_lvol_name() + + self.delete_lv(self.module, force, self.vg.name, self.name) + self.create_lv(self.module, self.size, self.unit, opts, self.vg.name, self.name, pvs, mode) + + if cache_lvol_name is not None: + lvol = Lvol(self.module, self.vg.name, cache_lvol_name, self.unit) + lvol.convert_to_cache("%s/%s" % (self.vg.name, self.name)) + + self.__init__(self.module, self.vg.name, self.name, self.unit) + +class CacheLvol(Lvol): + + @classmethod + def create_lv(cls, module, requested_size, unit, opts, vg_name, lv_name, pvs, pool): + opts += " --type cache --cachepool %s" % (pool) + super(CacheLvol, cls).create_lv(module, requested_size, unit, opts, vg_name, lv_name, pvs) + + def shrink_cache_lv(self, force, requested_size, pvs): + self.split_cache_lv() + self.shrink_lv(force, requested_size, pvs) + self.attach_cache_lv() + + def extend_cache_lv(self, requested_size, pvs): + self.split_cache_lv() + self.extend_lv(requested_size, pvs) + self.attach_cache_lv() + + def convert_to_normal(self): + lvconvert_cmd = self.module.get_bin_path("lvconvert", required=True) + lvsplit_cmd = "%s --splitcache %s/%s" % (lvconvert_cmd, self.vg.name, self.name) + + rc, _, err = self.module.run_command(lvsplit_cmd) + + if rc != 0: + self.module.fail_json(msg="Spliting cache from logical volume '%s' failed" % self.name, rc=rc, err=err) + + return Lvol(self.module, self.vg.name, self.name, self.unit) + + def split_cache_lv(self): + lvconvert_cmd = self.module.get_bin_path("lvconvert", required=True) + lvsplit_cmd = "%s --splitcache %s/%s" % (lvconvert_cmd, self.vg.name, self.name) + + rc, _, err = self.module.run_command(lvsplit_cmd) + + if rc != 0: + self.module.fail_json(msg="Spliting cache from logical volume '%s' failed" % self.name, rc=rc, err=err) + + def attach_cache_lv(self): + lvconvert_cmd = self.module.get_bin_path("lvconvert", required=True) + lvattach_cmd = "%s --type cache --cachepool %s %s/%s" % (lvconvert_cmd, self.pool_lv, self.vg.name, self.name) + + rc, _, err = self.module.run_command(lvattach_cmd) + + if rc != 0: + self.module.fail_json(msg="Attaching cache %s to logical volume %s failed" % (self.pool_lv, self.name), rc=rc, err=err) + + def resize_lv(self, force, requested_size, pvs): + if self.size < requested_size: + self.extend_cache_lv(requested_size, pvs) + elif self.size > requested_size + self.vg.vg_extent_size: # more than an extent too large + self.shrink_cache_lv(force, requested_size, pvs) + + def convert_to_cache_pool(self, force, mode): + lvol = self.convert_to_normal() + cachePoolLvol = lvol.convert_to_cache_pool(force, mode) + + return cachePoolLvol + + def change_pool(self, pool): + lvol = self.convert_to_normal() + lvol.convert_to_cache(pool) + + self.__init__(self.module, self.vg.name, self.name, self.unit) + +def validate_size(module, size): + if '%' in size: + size_parts = size.split('%', 1) + size_percent = int(size_parts[0]) + + if size_percent > 100: + module.fail_json(msg="Size percentage cannot be larger than 100%") + + size_whole = size_parts[1] + + if size_whole == 'ORIGIN': + module.fail_json(msg="Snapshot Volumes are not supported") + elif size_whole not in ['VG', 'PVS', 'FREE']: + module.fail_json(msg="Specify extents as a percentage of VG|PVS|FREE") + + if not '%' in size: + if size[-1].lower() in 'bskmgtpe': + size = size[0:-1] + else: + module.fail_json(msg="Invalid units for size: %s" % size) + + try: + float(size) + if not size[0].isdigit(): raise ValueError() + except ValueError: + module.fail_json(msg="Bad size specification of '%s'" % size) + +def main(): + module = AnsibleModule( + argument_spec=dict( + vg=dict(required=True), + lv=dict(required=True), + size=dict(type='str'), + opts=dict(type='str'), + state=dict(choices=["absent", "present"], default='present'), + force=dict(type='bool', default='no'), + pvs=dict(type='str'), + type=dict(choices=["cache", "cache-pool", "normal"], default="normal"), + mode=dict(choices=["writeback", "writethrough"], default='writethrough'), + pool=dict(type='str') + ), + supports_check_mode=True, + ) + + vg = module.params['vg'] + lv = module.params['lv'] + size = module.params['size'] + opts = module.params['opts'] + state = module.params['state'] + force = module.boolean(module.params['force']) + pvs = module.params['pvs'] + type = module.params['type'] + mode = module.params['mode'] + pool = module.params['pool'] + + if size: validate_size(module, size) + + if pvs is None: + pvs = "" + else: + pvs = pvs.replace(",", " ") + + if opts is None: + opts = "" + + # when no unit, megabytes by default + if '%' in size: + unit = 'm' + else: + unit = size[-1].lower() + + changed = False + msg = '' + + if type == 'cache' and not pool: + module.fail_json(msg="You must specify also pool when type is cache") + + if state == 'present' and not size: + if not Lvol.exists(module, vg, lv): + module.fail_json(msg="No size given.") + else: + module.exit_json(changed=False, vg=vg, lv=lv, size=vg) + + vg_obj = Vg(module, vg, unit) + + if not Lvol.exists(module, vg, lv): + if state == 'present': + if module.check_mode: + changed = True + else: + requested_size = Lvol.calculate_size(vg_obj.free, vg_obj.size, 0, size) + + if type != "normal": + if type == 'cache': + CacheLvol.create_lv(module, requested_size, unit, opts, vg, lv, pvs, pool) + elif type == 'cache-pool': + CachePoolLvol.create_lv(module, requested_size, unit, opts, vg, lv, pvs, mode) + else: + Lvol.create_lv(module, requested_size, unit, opts, vg, lv, pvs) + + changed = True + msg="Volume %s/%s created" % (vg, lv) + else: + if state == 'absent': + if module.check_mode: + module.exit_json(changed=True) + else: + if Lvol.is_cache_lv(module, vg, lv): + cacheLvol = CacheLvol(module, vg, lv, unit) + lvol = cacheLvol.convert_to_normal() + + changed = True + msg = "Volume %s converted to normal LV to %s." % (lv, size) + + Lvol.delete_lv(module, force, vg, lv) + + changed = True + msg += "Volume %s/%s deleted." % (vg, lv) + else: + if module.check_mode: + changed = True + else: + if type != "normal": + if type == 'cache': + if not Lvol.is_cache_lv(module, vg, lv): + if Lvol.is_cache_pool(module, vg, lv): + cachePoolLvol = CachePoolLvol(module, vg, lv, unit) + cacheLvol = cachePoolLvol.convert_to_cache(force, opts, pvs, pool) + else: + lvol = Lvol(module, vg, lv, unit) + cacheLvol = lvol.convert_to_cache(pool) + + changed = True + msg = "Volume %s converted to cache LV to %s." % (lv, size) + else: + cacheLvol = CacheLvol(module, vg, lv, unit) + + requested_size = cacheLvol.calculate_size(vg_obj.free, vg_obj.size, cacheLvol.size, size) + lvol_size_min = cacheLvol.size - vg_obj.vg_extent_size + lvol_size_max = cacheLvol.size + vg_obj.vg_extent_size + + current_pool = "%s/%s" % (cacheLvol.vg.name, cacheLvol.pool_lv) + + if pool != current_pool: + cacheLvol.change_pool(pool) + + changed = True + msg += "Changed pool of %s to %s." % (lv, pool) + + if not (lvol_size_min <= requested_size <= lvol_size_max): + cacheLvol.resize_lv(force, requested_size, pvs) + + changed = True + msg += "Volume %s resized to %s." % (lv, size) + + elif type == 'cache-pool': + if not Lvol.is_cache_pool(module, vg, lv): + if Lvol.is_cache_lv(module, vg, lv): + cacheLvol = CacheLvol(module, vg, lv, unit) + cachePoolLvol = cacheLvol.convert_to_cache_pool(force, mode) + else: + lvol = Lvol(module, vg, lv, unit) + cachePoolLvol = lvol.convert_to_cache_pool(force, mode) + + changed = True + msg = "Volume %s converted to cache pool to %s." % (lv, size) + else: + cachePoolLvol = CachePoolLvol(module, vg, lv, unit) + + requested_size = cachePoolLvol.calculate_size(vg_obj.free, vg_obj.size, cachePoolLvol.size, size) + lvol_size_min = cachePoolLvol.size - vg_obj.vg_extent_size + lvol_size_max = cachePoolLvol.size + vg_obj.vg_extent_size + + if mode != cachePoolLvol.cachemode: + cachePoolLvol.change_mode(force, opts, pvs, mode) + + changed = True + msg += "Changed pool mode of %s to %s." % (lv, mode) + + if not (lvol_size_min <= requested_size <= lvol_size_max): + cachePoolLvol.resize_lv(force, requested_size, pvs) + + changed = True + msg += "Volume %s resized to %s." % (lv, size) + else: + if Lvol.is_cache_lv(module, vg, lv): + cacheLvol = CacheLvol(module, vg, lv, unit) + lvol = cacheLvol.convert_to_normal() + + changed = True + msg = "Volume %s converted to normal LV to %s." % (lv, size) + elif Lvol.is_cache_pool(module, vg, lv): + cachePoolLvol = CachePoolLvol(module, vg, lv, unit) + cache_lvol_name = cachePoolLvol.get_cache_lvol_name() + + if cache_lvol_name is not None: + cacheLvol = CacheLvol(module, vg, cache_lvol_name, unit) + lvol = cacheLvol.convert_to_normal() + else: + lvol = cachePoolLvol.convert_to_normal(force, opts, pvs) + + changed = True + msg += "Volume %s converted to normal LV to %s." % (lv, size) + else: + lvol = Lvol(module, vg, lv, unit) + + requested_size = lvol.calculate_size(vg_obj.free, vg_obj.size, lvol.size, size) + lvol_size_min = lvol.size - vg_obj.vg_extent_size + lvol_size_max = lvol.size + vg_obj.vg_extent_size + + if not (lvol_size_min <= requested_size <= lvol_size_max): + lvol.resize_lv(force, requested_size, pvs) + + changed = True + msg += "Volume %s resized to %s." % (lv, size) + + module.exit_json(changed=changed, msg=msg) + +if __name__ == '__main__': + main()