#!/usr/bin/python
# Copyright 2013 Google Inc.
#
# 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: gce
version_added: "1.4"
short_description: create or terminate GCE instances
description:
- Creates or terminates Google Compute Engine (GCE) instances. See
U(https://cloud.google.com/products/compute-engine) for an overview.
Full install/configuration instructions for the gce* modules can
be found in the comments of ansible/test/gce_tests.py.
options:
image:
description:
- image string to use for the instance
required: false
default: "debian-7"
aliases: []
instance_names:
description:
- a comma-separated list of instance names to create or destroy
required: false
default: null
aliases: []
machine_type:
description:
- machine type to use for the instance, use 'n1-standard-1' by default
required: false
default: "n1-standard-1"
aliases: []
metadata:
description:
- a hash/dictionary of custom data for the instance; '{"key":"value",...}'
required: false
default: null
aliases: []
name:
description:
- identifier when working with a single instance
required: false
aliases: []
network:
description:
- name of the network, 'default' will be used if not specified
required: false
default: "default"
aliases: []
persistent_boot_disk:
description:
- if set, create the instance with a persistent boot disk
required: false
default: "false"
aliases: []
state:
description:
- desired state of the resource
required: false
default: "present"
choices: ["active", "present", "absent", "deleted"]
aliases: []
tags:
description:
- a comma-separated list of tags to associate with the instance
required: false
default: null
aliases: []
zone:
description:
- the GCE zone to use
required: true
default: "us-central1-a"
choices: ["us-central1-a", "us-central1-b", "us-central2-a", "europe-west1-a", "europe-west1-b"]
aliases: []
requirements: [ "libcloud" ]
author: Eric Johnson <erjohnso@google.com>
'''
EXAMPLES = '''
# Basic provisioning example. Create a single Debian 7 instance in the
# us-central1-a Zone of n1-standard-1 machine type.
- local_action:
module: gce
name: test-instance
zone: us-central1-a
machine_type: n1-standard-1
image: debian-7
# Example using defaults and with metadata to create a single 'foo' instance
- local_action:
module: gce
name: foo
metadata: '{"db":"postgres", "group":"qa", "id":500}'
# Launch instances from a control node, runs some tasks on the new instances,
# and then terminate them
- name: Create a sandbox instance
hosts: localhost
vars:
names: foo,bar
machine_type: n1-standard-1
image: debian-6
zone: us-central1-a
tasks:
- name: Launch instances
local_action: gce instance_names={{names}} machine_type={{machine_type}}
image={{image}} zone={{zone}}
register: gce
- name: Wait for SSH to come up
local_action: wait_for host={{item.public_ip}} port=22 delay=10
timeout=60 state=started
with_items: {{gce.instance_data}}
- name: Configure instance(s)
hosts: launched
sudo: True
roles:
- my_awesome_role
- my_awesome_tasks
- name: Terminate instances
hosts: localhost
connection: local
tasks:
- name: Terminate instances that were previously launched
local_action:
module: gce
state: 'absent'
instance_names: {{gce.instance_names}}
'''
import sys
USER_AGENT_PRODUCT="Ansible-gce"
USER_AGENT_VERSION="v1beta15"
try:
from libcloud.compute.types import Provider
from libcloud.compute.providers import get_driver
from libcloud.common.google import GoogleBaseError, QuotaExceededError, \
ResourceExistsError, ResourceInUseError, ResourceNotFoundError
_ = Provider.GCE
except ImportError:
print("failed=True " + \
"msg='libcloud with GCE support (0.13.3+) required for this module'")
sys.exit(1)
try:
from ast import literal_eval
except ImportError:
print("failed=True " + \
"msg='GCE module requires python's 'ast' module, python v2.6+'")
sys.exit(1)
# Load in the libcloud secrets file
try:
import secrets
except ImportError:
secrets = None
ARGS = getattr(secrets, 'GCE_PARAMS', ())
KWARGS = getattr(secrets, 'GCE_KEYWORD_PARAMS', {})
if not ARGS or not 'project' in KWARGS:
print("failed=True " + \
"msg='Missing GCE connection parametres in libcloud secrets file.'")
sys.exit(1)
def unexpected_error_msg(error):
"""Create an error string based on passed in error."""
msg='Unexpected response: HTTP return_code['
msg+='%s], API error code[%s] and message: %s' % (
error.http_code, error.code, str(error.value))
return msg
def get_instance_info(inst):
"""Retrieves instance information from an instance object and returns it
as a dictionary.
"""
metadata = {}
if 'metadata' in inst.extra and 'items' in inst.extra['metadata']:
for md in inst.extra['metadata']['items']:
metadata[md['key']] = md['value']
try:
netname = inst.extra['networkInterfaces'][0]['network'].split('/')[-1]
except:
netname = None
return({
'image': not inst.image is None and inst.image.split('/')[-1] or None,
'machine_type': inst.size,
'metadata': metadata,
'name': inst.name,
'network': netname,
'private_ip': inst.private_ips[0],
'public_ip': inst.public_ips[0],
'status': ('status' in inst.extra) and inst.extra['status'] or None,
'tags': ('tags' in inst.extra) and inst.extra['tags'] or [],
'zone': ('zone' in inst.extra) and inst.extra['zone'].name or None,
})
def create_instances(module, gce, instance_names):
"""Creates new instances. Attributes other than instance_names are picked
up from 'module'
module : AnsibleModule object
gce: authenticated GCE libcloud driver
instance_names: python list of instance names to create
Returns:
A list of dictionaries with instance information
about the instances that were launched.
"""
image = module.params.get('image')
machine_type = module.params.get('machine_type')
metadata = module.params.get('metadata')
network = module.params.get('network')
persistent_boot_disk = module.params.get('persistent_boot_disk')
state = module.params.get('state')
tags = module.params.get('tags')
zone = module.params.get('zone')
new_instances = []
changed = False
lc_image = gce.ex_get_image(image)
lc_network = gce.ex_get_network(network)
lc_machine_type = gce.ex_get_size(machine_type)
lc_zone = gce.ex_get_zone(zone)
# Try to convert the user's metadata value into the format expected
# by GCE. First try to ensure user has proper quoting of a
# dictionary-like syntax using 'literal_eval', then convert the python
# dict into a python list of 'key' / 'value' dicts. Should end up
# with:
# [ {'key': key1, 'value': value1}, {'key': key2, 'value': value2}, ...]
if metadata:
try:
md = literal_eval(metadata)
if not isinstance(md, dict):
raise ValueError('metadata must be a dict')
except ValueError as e:
print("failed=True msg='bad metadata: %s'" % str(e))
sys.exit(1)
except SyntaxError as e:
print("failed=True msg='bad metadata syntax'")
sys.exit(1)
items = []
for k,v in md.items():
items.append({"key": k,"value": v})
metadata = {'items': items}
# These variables all have default values but check just in case
if not lc_image or not lc_network or not lc_machine_type or not lc_zone:
module.fail_json(msg='Missing required create instance variable',
changed=False)
for name in instance_names:
pd = None
if persistent_boot_disk:
try:
pd = gce.create_volume(None, "%s" % name, image=lc_image)
except ResourceExistsError:
pd = gce.ex_get_volume("%s" % name, lc_zone)
inst = None
try:
inst = gce.create_node(name, lc_machine_type, lc_image,
location=lc_zone, ex_network=network, ex_tags=tags,
ex_metadata=metadata, ex_boot_disk=pd)
changed = True
except ResourceExistsError:
inst = gce.ex_get_node(name, lc_zone)
except GoogleBaseError as e:
module.fail_json(msg='Unexpected error attempting to create ' + \
'instance %s, error: %s' % (name, e.value))
if inst:
new_instances.append(inst)
instance_names = []
instance_json_data = []
for inst in new_instances:
d = get_instance_info(inst)
instance_names.append(d['name'])
instance_json_data.append(d)
return (changed, instance_json_data, instance_names)
def terminate_instances(module, gce, instance_names, zone_name):
"""Terminates a list of instances.
module: Ansible module object
gce: authenticated GCE connection object
instance_names: a list of instance names to terminate
zone_name: the zone where the instances reside prior to termination
Returns a dictionary of instance names that were terminated.
"""
changed = False
terminated_instance_names = []
for name in instance_names:
inst = None
try:
inst = gce.ex_get_node(name, zone_name)
except ResourceNotFoundError:
pass
except Exception as e:
module.fail_json(msg=unexpected_error_msg(e), changed=False)
if inst:
gce.destroy_node(inst)
terminated_instance_names.append(inst.name)
changed = True
return (changed, terminated_instance_names)
def main():
module = AnsibleModule(
argument_spec = dict(
image = dict(default='debian-7'),
instance_names = dict(),
machine_type = dict(default='n1-standard-1'),
metadata = dict(),
name = dict(),
network = dict(default='default'),
persistent_boot_disk = dict(type='bool', choices=BOOLEANS, default=False),
state = dict(choices=['active', 'present', 'absent', 'deleted'],
default='present'),
tags = dict(type='list'),
zone = dict(choices=['us-central1-a', 'us-central1-b',
'us-central2-a', 'europe-west1-a', 'europe-west1-b'],
default='us-central1-a'),
)
)
image = module.params.get('image')
instance_names = module.params.get('instance_names')
machine_type = module.params.get('machine_type')
metadata = module.params.get('metadata')
name = module.params.get('name')
network = module.params.get('network')
persistent_boot_disk = module.params.get('persistent_boot_disk')
state = module.params.get('state')
tags = module.params.get('tags')
zone = module.params.get('zone')
changed = False
try:
gce = get_driver(Provider.GCE)(*ARGS, datacenter=zone, **KWARGS)
gce.connection.user_agent_append("%s/%s" % (
USER_AGENT_PRODUCT, USER_AGENT_VERSION))
except Exception as e:
module.fail_json(msg=unexpected_error_msg(e), changed=False)
inames = []
if isinstance(instance_names, list):
inames = instance_names
elif isinstance(instance_names, str):
inames = instance_names.split(',')
if name:
inames.append(name)
if not inames:
module.fail_json(msg='Must specify a "name" or "instance_names"',
changed=False)
if not zone:
module.fail_json(msg='Must specify a "zone"', changed=False)
json_output = {'zone': zone}
if state in ['absent', 'deleted']:
json_output['state'] = 'absent'
(changed, terminated_instance_names) = terminate_instances(module,
gce, inames, zone)
# based on what user specified, return the same variable, although
# value could be different if an instance could not be destroyed
if instance_names:
json_output['instance_names'] = terminated_instance_names
elif name:
json_output['name'] = name
elif state in ['active', 'present']:
json_output['state'] = 'present'
(changed, instance_data,instance_name_list) = create_instances(
module, gce, inames)
json_output['instance_data'] = instance_data
if instance_names:
json_output['instance_names'] = instance_name_list
elif name:
json_output['name'] = name
json_output['changed'] = changed
print json.dumps(json_output)
sys.exit(0)
# this is magic, see lib/ansible/module_common.py
#<<INCLUDE_ANSIBLE_MODULE_COMMON>>
main()