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ansible/cloud/misc/virt_pool.py
Maciej Delmanowski 375b2234b1 Update author information in virt_pool docs
2015-07-28 00:22:51 +02:00

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#!/usr/bin/python
# -*- coding: utf-8 -*-
# (c) 2015, Maciej Delmanowski <drybjed@gmail.com>
#
# 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 = '''
---
module: virt_pool
author: "Maciej Delmanowski (@drybjed)"
version_added: "2.0"
short_description: Manage libvirt storage pools
description:
- Manage I(libvirt) storage pools.
options:
name:
required: false
aliases: [ "pool" ]
description:
- name of the storage pool being managed. Note that pool must be previously
defined with xml.
state:
required: false
choices: [ "active", "inactive", "present", "absent", "undefined", "deleted" ]
description:
- specify which state you want a storage pool to be in.
If 'active', pool will be started.
If 'present', ensure that pool is present but do not change its
state; if it's missing, you need to specify xml argument.
If 'inactive', pool will be stopped.
If 'undefined' or 'absent', pool will be removed from I(libvirt) configuration.
If 'deleted', pool contents will be deleted and then pool undefined.
command:
required: false
choices: [ "define", "build", "create", "start", "stop", "destroy",
"delete", "undefine", "get_xml", "list_pools", "facts",
"info", "status" ]
description:
- in addition to state management, various non-idempotent commands are available.
See examples.
autostart:
required: false
choices: ["yes", "no"]
description:
- Specify if a given storage pool should be started automatically on system boot.
uri:
required: false
default: "qemu:///system"
description:
- I(libvirt) connection uri.
xml:
required: false
description:
- XML document used with the define command.
mode:
required: false
choices: [ 'new', 'repair', 'resize', 'no_overwrite', 'overwrite', 'normal', 'zeroed' ]
description:
- Pass additional parameters to 'build' or 'delete' commands.
requirements:
- "python >= 2.6"
- "python-libvirt"
- "python-lxml"
'''
EXAMPLES = '''
# Define a new storage pool
- virt_pool: command=define name=vms xml='{{ lookup("template", "pool/dir.xml.j2") }}'
# Build a storage pool if it does not exist
- virt_pool: command=build name=vms
# Start a storage pool
- virt_pool: command=create name=vms
# List available pools
- virt_pool: command=list_pools
# Get XML data of a specified pool
- virt_pool: command=get_xml name=vms
# Stop a storage pool
- virt_pool: command=destroy name=vms
# Delete a storage pool (destroys contents)
- virt_pool: command=delete name=vms
# Undefine a storage pool
- virt_pool: command=undefine name=vms
# Gather facts about storage pools
# Facts will be available as 'ansible_libvirt_pools'
- virt_pool: command=facts
# Gather information about pools managed by 'libvirt' remotely using uri
- virt_pool: command=info uri='{{ item }}'
with_items: libvirt_uris
register: storage_pools
# Ensure that a pool is active (needs to be defined and built first)
- virt_pool: state=active name=vms
# Ensure that a pool is inactive
- virt_pool: state=inactive name=vms
# Ensure that a given pool will be started at boot
- virt_pool: autostart=yes name=vms
# Disable autostart for a given pool
- virt_pool: autostart=no name=vms
'''
VIRT_FAILED = 1
VIRT_SUCCESS = 0
VIRT_UNAVAILABLE=2
import sys
try:
import libvirt
except ImportError:
HAS_VIRT = False
else:
HAS_VIRT = True
try:
from lxml import etree
except ImportError:
HAS_XML = False
else:
HAS_XML = True
ALL_COMMANDS = []
ENTRY_COMMANDS = ['create', 'status', 'start', 'stop', 'build', 'delete',
'undefine', 'destroy', 'get_xml', 'define', 'refresh']
HOST_COMMANDS = [ 'list_pools', 'facts', 'info' ]
ALL_COMMANDS.extend(ENTRY_COMMANDS)
ALL_COMMANDS.extend(HOST_COMMANDS)
ENTRY_STATE_ACTIVE_MAP = {
0 : "inactive",
1 : "active"
}
ENTRY_STATE_AUTOSTART_MAP = {
0 : "no",
1 : "yes"
}
ENTRY_STATE_PERSISTENT_MAP = {
0 : "no",
1 : "yes"
}
ENTRY_STATE_INFO_MAP = {
0 : "inactive",
1 : "building",
2 : "running",
3 : "degraded",
4 : "inaccessible"
}
ENTRY_BUILD_FLAGS_MAP = {
"new" : 0,
"repair" : 1,
"resize" : 2,
"no_overwrite" : 4,
"overwrite" : 8
}
ENTRY_DELETE_FLAGS_MAP = {
"normal" : 0,
"zeroed" : 1
}
ALL_MODES = []
ALL_MODES.extend(ENTRY_BUILD_FLAGS_MAP.keys())
ALL_MODES.extend(ENTRY_DELETE_FLAGS_MAP.keys())
class EntryNotFound(Exception):
pass
class LibvirtConnection(object):
def __init__(self, uri, module):
self.module = module
conn = libvirt.open(uri)
if not conn:
raise Exception("hypervisor connection failure")
self.conn = conn
def find_entry(self, entryid):
# entryid = -1 returns a list of everything
results = []
# Get active entries
for name in self.conn.listStoragePools():
entry = self.conn.storagePoolLookupByName(name)
results.append(entry)
# Get inactive entries
for name in self.conn.listDefinedStoragePools():
entry = self.conn.storagePoolLookupByName(name)
results.append(entry)
if entryid == -1:
return results
for entry in results:
if entry.name() == entryid:
return entry
raise EntryNotFound("storage pool %s not found" % entryid)
def create(self, entryid):
if not self.module.check_mode:
return self.find_entry(entryid).create()
else:
try:
state = self.find_entry(entryid).isActive()
except:
return self.module.exit_json(changed=True)
if not state:
return self.module.exit_json(changed=True)
def destroy(self, entryid):
if not self.module.check_mode:
return self.find_entry(entryid).destroy()
else:
if self.find_entry(entryid).isActive():
return self.module.exit_json(changed=True)
def undefine(self, entryid):
if not self.module.check_mode:
return self.find_entry(entryid).undefine()
else:
if not self.find_entry(entryid):
return self.module.exit_json(changed=True)
def get_status2(self, entry):
state = entry.isActive()
return ENTRY_STATE_ACTIVE_MAP.get(state,"unknown")
def get_status(self, entryid):
if not self.module.check_mode:
state = self.find_entry(entryid).isActive()
return ENTRY_STATE_ACTIVE_MAP.get(state,"unknown")
else:
try:
state = self.find_entry(entryid).isActive()
return ENTRY_STATE_ACTIVE_MAP.get(state,"unknown")
except:
return ENTRY_STATE_ACTIVE_MAP.get("inactive","unknown")
def get_uuid(self, entryid):
return self.find_entry(entryid).UUIDString()
def get_xml(self, entryid):
return self.find_entry(entryid).XMLDesc(0)
def get_info(self, entryid):
return self.find_entry(entryid).info()
def get_volume_count(self, entryid):
return self.find_entry(entryid).numOfVolumes()
def get_volume_names(self, entryid):
return self.find_entry(entryid).listVolumes()
def get_devices(self, entryid):
xml = etree.fromstring(self.find_entry(entryid).XMLDesc(0))
if xml.xpath('/pool/source/device'):
result = []
for device in xml.xpath('/pool/source/device'):
result.append(device.get('path'))
try:
return result
except:
raise ValueError('No devices specified')
def get_format(self, entryid):
xml = etree.fromstring(self.find_entry(entryid).XMLDesc(0))
try:
result = xml.xpath('/pool/source/format')[0].get('type')
except:
raise ValueError('Format not specified')
return result
def get_host(self, entryid):
xml = etree.fromstring(self.find_entry(entryid).XMLDesc(0))
try:
result = xml.xpath('/pool/source/host')[0].get('name')
except:
raise ValueError('Host not specified')
return result
def get_source_path(self, entryid):
xml = etree.fromstring(self.find_entry(entryid).XMLDesc(0))
try:
result = xml.xpath('/pool/source/dir')[0].get('path')
except:
raise ValueError('Source path not specified')
return result
def get_path(self, entryid):
xml = etree.fromstring(self.find_entry(entryid).XMLDesc(0))
return xml.xpath('/pool/target/path')[0].text
def get_type(self, entryid):
xml = etree.fromstring(self.find_entry(entryid).XMLDesc(0))
return xml.get('type')
def build(self, entryid, flags):
if not self.module.check_mode:
return self.find_entry(entryid).build(flags)
else:
try:
state = self.find_entry(entryid)
except:
return self.module.exit_json(changed=True)
if not state:
return self.module.exit_json(changed=True)
def delete(self, entryid, flags):
if not self.module.check_mode:
return self.find_entry(entryid).delete(flags)
else:
try:
state = self.find_entry(entryid)
except:
return self.module.exit_json(changed=True)
if state:
return self.module.exit_json(changed=True)
def get_autostart(self, entryid):
state = self.find_entry(entryid).autostart()
return ENTRY_STATE_AUTOSTART_MAP.get(state,"unknown")
def get_autostart2(self, entryid):
if not self.module.check_mode:
return self.find_entry(entryid).autostart()
else:
try:
return self.find_entry(entryid).autostart()
except:
return self.module.exit_json(changed=True)
def set_autostart(self, entryid, val):
if not self.module.check_mode:
return self.find_entry(entryid).setAutostart(val)
else:
try:
state = self.find_entry(entryid).autostart()
except:
return self.module.exit_json(changed=True)
if bool(state) != val:
return self.module.exit_json(changed=True)
def refresh(self, entryid):
return self.find_entry(entryid).refresh()
def get_persistent(self, entryid):
state = self.find_entry(entryid).isPersistent()
return ENTRY_STATE_PERSISTENT_MAP.get(state,"unknown")
def define_from_xml(self, entryid, xml):
if not self.module.check_mode:
return self.conn.storagePoolDefineXML(xml)
else:
try:
state = self.find_entry(entryid)
except:
return self.module.exit_json(changed=True)
class VirtStoragePool(object):
def __init__(self, uri, module):
self.module = module
self.uri = uri
self.conn = LibvirtConnection(self.uri, self.module)
def get_pool(self, entryid):
return self.conn.find_entry(entryid)
def list_pools(self, state=None):
results = []
for entry in self.conn.find_entry(-1):
if state:
if state == self.conn.get_status2(entry):
results.append(entry.name())
else:
results.append(entry.name())
return results
def state(self):
results = []
for entry in self.list_pools():
state_blurb = self.conn.get_status(entry)
results.append("%s %s" % (entry,state_blurb))
return results
def autostart(self, entryid):
return self.conn.set_autostart(entryid, True)
def get_autostart(self, entryid):
return self.conn.get_autostart2(entryid)
def set_autostart(self, entryid, state):
return self.conn.set_autostart(entryid, state)
def create(self, entryid):
return self.conn.create(entryid)
def start(self, entryid):
return self.conn.create(entryid)
def stop(self, entryid):
return self.conn.destroy(entryid)
def destroy(self, entryid):
return self.conn.destroy(entryid)
def undefine(self, entryid):
return self.conn.undefine(entryid)
def status(self, entryid):
return self.conn.get_status(entryid)
def get_xml(self, entryid):
return self.conn.get_xml(entryid)
def define(self, entryid, xml):
return self.conn.define_from_xml(entryid, xml)
def build(self, entryid, flags):
return self.conn.build(entryid, ENTRY_BUILD_FLAGS_MAP.get(flags,0))
def delete(self, entryid, flags):
return self.conn.delete(entryid, ENTRY_DELETE_FLAGS_MAP.get(flags,0))
def refresh(self, entryid):
return self.conn.refresh(entryid)
def info(self):
return self.facts(facts_mode='info')
def facts(self, facts_mode='facts'):
results = dict()
for entry in self.list_pools():
results[entry] = dict()
if self.conn.find_entry(entry):
data = self.conn.get_info(entry)
# libvirt returns maxMem, memory, and cpuTime as long()'s, which
# xmlrpclib tries to convert to regular int's during serialization.
# This throws exceptions, so convert them to strings here and
# assume the other end of the xmlrpc connection can figure things
# out or doesn't care.
results[entry] = {
"status" : ENTRY_STATE_INFO_MAP.get(data[0],"unknown"),
"size_total" : str(data[1]),
"size_used" : str(data[2]),
"size_available" : str(data[3]),
}
results[entry]["autostart"] = self.conn.get_autostart(entry)
results[entry]["persistent"] = self.conn.get_persistent(entry)
results[entry]["state"] = self.conn.get_status(entry)
results[entry]["path"] = self.conn.get_path(entry)
results[entry]["type"] = self.conn.get_type(entry)
results[entry]["uuid"] = self.conn.get_uuid(entry)
if self.conn.find_entry(entry).isActive():
results[entry]["volume_count"] = self.conn.get_volume_count(entry)
results[entry]["volumes"] = list()
for volume in self.conn.get_volume_names(entry):
results[entry]["volumes"].append(volume)
else:
results[entry]["volume_count"] = -1
try:
results[entry]["host"] = self.conn.get_host(entry)
except ValueError as e:
pass
try:
results[entry]["source_path"] = self.conn.get_source_path(entry)
except ValueError as e:
pass
try:
results[entry]["format"] = self.conn.get_format(entry)
except ValueError as e:
pass
try:
devices = self.conn.get_devices(entry)
results[entry]["devices"] = devices
except ValueError as e:
pass
else:
results[entry]["state"] = self.conn.get_status(entry)
facts = dict()
if facts_mode == 'facts':
facts["ansible_facts"] = dict()
facts["ansible_facts"]["ansible_libvirt_pools"] = results
elif facts_mode == 'info':
facts['pools'] = results
return facts
def core(module):
state = module.params.get('state', None)
name = module.params.get('name', None)
command = module.params.get('command', None)
uri = module.params.get('uri', None)
xml = module.params.get('xml', None)
autostart = module.params.get('autostart', None)
mode = module.params.get('mode', None)
v = VirtStoragePool(uri, module)
res = {}
if state and command == 'list_pools':
res = v.list_pools(state=state)
if type(res) != dict:
res = { command: res }
return VIRT_SUCCESS, res
if state:
if not name:
module.fail_json(msg = "state change requires a specified name")
res['changed'] = False
if state in [ 'active' ]:
if v.status(name) is not 'active':
res['changed'] = True
res['msg'] = v.start(name)
elif state in [ 'present' ]:
try:
v.get_pool(name)
except EntryNotFound:
if not xml:
module.fail_json(msg = "storage pool '" + name + "' not present, but xml not specified")
v.define(name, xml)
res = {'changed': True, 'created': name}
elif state in [ 'inactive' ]:
entries = v.list_pools()
if name in entries:
if v.status(name) is not 'inactive':
res['changed'] = True
res['msg'] = v.destroy(name)
elif state in [ 'undefined', 'absent' ]:
entries = v.list_pools()
if name in entries:
if v.status(name) is not 'inactive':
v.destroy(name)
res['changed'] = True
res['msg'] = v.undefine(name)
elif state in [ 'deleted' ]:
entries = v.list_pools()
if name in entries:
if v.status(name) is not 'inactive':
v.destroy(name)
v.delete(name, mode)
res['changed'] = True
res['msg'] = v.undefine(name)
else:
module.fail_json(msg="unexpected state")
return VIRT_SUCCESS, res
if command:
if command in ENTRY_COMMANDS:
if not name:
module.fail_json(msg = "%s requires 1 argument: name" % command)
if command == 'define':
if not xml:
module.fail_json(msg = "define requires xml argument")
try:
v.get_pool(name)
except EntryNotFound:
v.define(name, xml)
res = {'changed': True, 'created': name}
return VIRT_SUCCESS, res
elif command == 'build':
res = v.build(name, mode)
if type(res) != dict:
res = { 'changed': True, command: res }
return VIRT_SUCCESS, res
elif command == 'delete':
res = v.delete(name, mode)
if type(res) != dict:
res = { 'changed': True, command: res }
return VIRT_SUCCESS, res
res = getattr(v, command)(name)
if type(res) != dict:
res = { command: res }
return VIRT_SUCCESS, res
elif hasattr(v, command):
res = getattr(v, command)()
if type(res) != dict:
res = { command: res }
return VIRT_SUCCESS, res
else:
module.fail_json(msg="Command %s not recognized" % basecmd)
if autostart:
if not name:
module.fail_json(msg = "state change requires a specified name")
res['changed'] = False
if autostart == 'yes':
if not v.get_autostart(name):
res['changed'] = True
res['msg'] = v.set_autostart(name, True)
elif autostart == 'no':
if v.get_autostart(name):
res['changed'] = True
res['msg'] = v.set_autostart(name, False)
return VIRT_SUCCESS, res
module.fail_json(msg="expected state or command parameter to be specified")
def main():
module = AnsibleModule (
argument_spec = dict(
name = dict(aliases=['pool']),
state = dict(choices=['active', 'inactive', 'present', 'absent', 'undefined', 'deleted']),
command = dict(choices=ALL_COMMANDS),
uri = dict(default='qemu:///system'),
xml = dict(),
autostart = dict(choices=['yes', 'no']),
mode = dict(choices=ALL_MODES),
),
supports_check_mode = True
)
if not HAS_VIRT:
module.fail_json(
msg='The `libvirt` module is not importable. Check the requirements.'
)
if not HAS_XML:
module.fail_json(
msg='The `lxml` module is not importable. Check the requirements.'
)
rc = VIRT_SUCCESS
try:
rc, result = core(module)
except Exception, e:
module.fail_json(msg=str(e))
if rc != 0: # something went wrong emit the msg
module.fail_json(rc=rc, msg=result)
else:
module.exit_json(**result)
# import module snippets
from ansible.module_utils.basic import *
main()
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