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ansible/library/cloud/ec2
Will Thames 7600c664fe Create a common EC2 connection argument spec for EC2 modules 
Refactor the currently well-factored ec2 modules (i.e. those that already use ec2_connect) to
have a common argument spec. The idea is that new modules can use this spec without duplication
of code, and that new functionality can be added to the ec2 connection code (e.g. security
token argument)
2014-02-06 15:27:41 +10:00

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#!/usr/bin/python
# 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: ec2
short_description: create, terminate, start or stop an instance in ec2, return instanceid
description:
- Creates or terminates ec2 instances. When created optionally waits for it to be 'running'. This module has a dependency on python-boto >= 2.5
version_added: "0.9"
options:
key_name:
description:
- key pair to use on the instance
required: false
default: null
aliases: ['keypair']
id:
description:
- identifier for this instance or set of instances, so that the module will be idempotent with respect to EC2 instances. This identifier is valid for at least 24 hours after the termination of the instance, and should not be reused for another call later on. For details, see the description of client token at U(http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/Run_Instance_Idempotency.html).
required: false
default: null
aliases: []
group:
description:
- security group (or list of groups) to use with the instance
required: false
default: null
aliases: [ 'groups' ]
group_id:
version_added: "1.1"
description:
- security group id (or list of ids) to use with the instance
required: false
default: null
aliases: []
region:
version_added: "1.2"
description:
- The AWS region to use. Must be specified if ec2_url is not used. If not specified then the value of the EC2_REGION environment variable, if any, is used.
required: false
default: null
aliases: [ 'aws_region', 'ec2_region' ]
zone:
version_added: "1.2"
description:
- AWS availability zone in which to launch the instance
required: false
default: null
aliases: [ 'aws_zone', 'ec2_zone' ]
instance_type:
description:
- instance type to use for the instance
required: true
default: null
aliases: []
image:
description:
- I(emi) (or I(ami)) to use for the instance
required: true
default: null
aliases: []
kernel:
description:
- kernel I(eki) to use for the instance
required: false
default: null
aliases: []
ramdisk:
description:
- ramdisk I(eri) to use for the instance
required: false
default: null
aliases: []
wait:
description:
- wait for the instance to be in state 'running' before returning
required: false
default: "no"
choices: [ "yes", "no" ]
aliases: []
wait_timeout:
description:
- how long before wait gives up, in seconds
default: 300
aliases: []
ec2_url:
description:
- Url to use to connect to EC2 or your Eucalyptus cloud (by default the module will use EC2 endpoints). Must be specified if region is not used. If not set then the value of the EC2_URL environment variable, if any, is used
required: false
default: null
aliases: []
aws_secret_key:
description:
- AWS secret key. If not set then the value of the AWS_SECRET_KEY environment variable is used.
required: false
default: null
aliases: [ 'ec2_secret_key', 'secret_key' ]
aws_access_key:
description:
- AWS access key. If not set then the value of the AWS_ACCESS_KEY environment variable is used.
required: false
default: null
aliases: [ 'ec2_access_key', 'access_key' ]
count:
description:
- number of instances to launch
required: False
default: 1
aliases: []
monitoring:
version_added: "1.1"
description:
- enable detailed monitoring (CloudWatch) for instance
required: false
default: null
aliases: []
user_data:
version_added: "0.9"
description:
- opaque blob of data which is made available to the ec2 instance
required: false
default: null
aliases: []
instance_tags:
version_added: "1.0"
description:
- a hash/dictionary of tags to add to the new instance; '{"key":"value"}' and '{"key":"value","key":"value"}'
required: false
default: null
aliases: []
placement_group:
version_added: "1.3"
description:
- placement group for the instance when using EC2 Clustered Compute
required: false
default: null
aliases: []
vpc_subnet_id:
version_added: "1.1"
description:
- the subnet ID in which to launch the instance (VPC)
required: false
default: null
aliases: []
assign_public_ip:
version_added: "1.4"
description:
- when provisioning within vpc, assign a public IP address. Boto library must be 2.13.0+
required: false
default: null
aliases: []
private_ip:
version_added: "1.2"
description:
- the private ip address to assign the instance (from the vpc subnet)
required: false
defualt: null
aliases: []
instance_profile_name:
version_added: "1.3"
description:
- Name of the IAM instance profile to use. Boto library must be 2.5.0+
required: false
default: null
aliases: []
instance_ids:
version_added: "1.3"
description:
- list of instance ids, currently only used when state='absent'
required: false
default: null
aliases: []
state:
version_added: "1.3"
description:
- create or terminate instances
required: false
default: 'present'
aliases: []
volumes:
version_added: "1.5"
description:
- a list of volume dicts, each containing device name and optionally ephemeral id or snapshot id. Size and type (and number of iops for io device type) must be specified for a new volume or a root volume, and may be passed for a snapshot volume. For any volume, a volume size less than 1 will be interpreted as a request not to create the volume.
required: false
default: null
aliases: []
requirements: [ "boto" ]
author: Seth Vidal, Tim Gerla, Lester Wade
'''
EXAMPLES = '''
# Note: None of these examples set aws_access_key, aws_secret_key, or region.
# It is assumed that their matching environment variables are set.
# Basic provisioning example
- local_action:
module: ec2
keypair: mykey
instance_type: c1.medium
image: emi-40603AD1
wait: yes
group: webserver
count: 3
# Advanced example with tagging and CloudWatch
- local_action:
module: ec2
keypair: mykey
group: databases
instance_type: m1.large
image: ami-6e649707
wait: yes
wait_timeout: 500
count: 5
instance_tags: '{"db":"postgres"}'
monitoring=yes
# Single instance with additional IOPS volume from snapshot
local_action:
module: ec2
keypair: mykey
group: webserver
instance_type: m1.large
image: ami-6e649707
wait: yes
wait_timeout: 500
volumes:
- device_name: /dev/sdb
snapshot: snap-abcdef12
device_type: io1
iops: 1000
volume_size: 100
monitoring=yes
# Multiple groups example
local_action:
module: ec2
keypair: mykey
group: ['databases', 'internal-services', 'sshable', 'and-so-forth']
instance_type: m1.large
image: ami-6e649707
wait: yes
wait_timeout: 500
count: 5
instance_tags: '{"db":"postgres"}'
monitoring=yes
# Multiple instances with additional volume from snapshot
local_action:
module: ec2
keypair: mykey
group: webserver
instance_type: m1.large
image: ami-6e649707
wait: yes
wait_timeout: 500
count: 5
volumes:
- device_name: /dev/sdb
snapshot: snap-abcdef12
volume_size: 10
monitoring=yes
# VPC example
- local_action:
module: ec2
keypair: mykey
group_id: sg-1dc53f72
instance_type: m1.small
image: ami-6e649707
wait: yes
vpc_subnet_id: subnet-29e63245
assign_public_ip: yes
# Launch instances, runs some tasks
# and then terminate them
- name: Create a sandbox instance
hosts: localhost
gather_facts: False
vars:
keypair: my_keypair
instance_type: m1.small
security_group: my_securitygroup
image: my_ami_id
region: us-east-1
tasks:
- name: Launch instance
local_action: ec2 keypair={{ keypair }} group={{ security_group }} instance_type={{ instance_type }} image={{ image }} wait=true region={{ region }}
register: ec2
- name: Add new instance to host group
local_action: add_host hostname={{ item.public_ip }} groupname=launched
with_items: ec2.instances
- name: Wait for SSH to come up
local_action: wait_for host={{ item.public_dns_name }} port=22 delay=60 timeout=320 state=started
with_items: ec2.instances
- name: Configure instance(s)
hosts: launched
sudo: True
gather_facts: True
roles:
- my_awesome_role
- my_awesome_test
- name: Terminate instances
hosts: localhost
connection: local
tasks:
- name: Terminate instances that were previously launched
local_action:
module: ec2
state: 'absent'
instance_ids: {{ec2.instance_ids}}
# Start a few existing instances, run some tasks
# and stop the instances
- name: Start sandbox instances
hosts: localhost
gather_facts: false
connection: local
vars:
instance_ids:
- 'i-xxxxxx'
- 'i-xxxxxx'
- 'i-xxxxxx'
region: us-east-1
tasks:
- name: Start the sandbox instances
local_action:
module: ec2
instance_ids: '{{ instance_ids }}'
region: '{{ region }}'
state: running
wait: True
role:
- do_neat_stuff
- do_more_neat_stuff
- name: Stop sandbox instances
hosts: localhost
gather_facts: false
connection: local
vars:
instance_ids:
- 'i-xxxxxx'
- 'i-xxxxxx'
- 'i-xxxxxx'
region: us-east-1
tasks:
- name: Stop the sanbox instances
local_action:
module: ec2
instance_ids: '{{ instance_ids }}'
region: '{{ region }}'
state: stopped
wait: True
'''
import sys
import time
try:
import boto.ec2
from boto.ec2.blockdevicemapping import BlockDeviceType, BlockDeviceMapping
from boto.exception import EC2ResponseError
except ImportError:
print "failed=True msg='boto required for this module'"
sys.exit(1)
def get_instance_info(inst):
"""
Retrieves instance information from an instance
ID and returns it as a dictionary
"""
instance_info = {'id': inst.id,
'ami_launch_index': inst.ami_launch_index,
'private_ip': inst.private_ip_address,
'private_dns_name': inst.private_dns_name,
'public_ip': inst.ip_address,
'dns_name': inst.dns_name,
'public_dns_name': inst.public_dns_name,
'state_code': inst.state_code,
'architecture': inst.architecture,
'image_id': inst.image_id,
'key_name': inst.key_name,
'placement': inst.placement,
'kernel': inst.kernel,
'ramdisk': inst.ramdisk,
'launch_time': inst.launch_time,
'instance_type': inst.instance_type,
'root_device_type': inst.root_device_type,
'root_device_name': inst.root_device_name,
'state': inst.state,
'hypervisor': inst.hypervisor}
try:
instance_info['virtualization_type'] = getattr(inst,'virtualization_type')
except AttributeError:
instance_info['virtualization_type'] = None
return instance_info
def boto_supports_associate_public_ip_address(ec2):
"""
Check if Boto library has associate_public_ip_address in the NetworkInterfaceSpecification
class. Added in Boto 2.13.0
ec2: authenticated ec2 connection object
Returns:
True if Boto library accepts associate_public_ip_address argument, else false
"""
try:
network_interface = boto.ec2.networkinterface.NetworkInterfaceSpecification()
getattr(network_interface, "associate_public_ip_address")
return True
except AttributeError:
return False
def boto_supports_profile_name_arg(ec2):
"""
Check if Boto library has instance_profile_name argument. instance_profile_name has been added in Boto 2.5.0
ec2: authenticated ec2 connection object
Returns:
True if Boto library accept instance_profile_name argument, else false
"""
run_instances_method = getattr(ec2, 'run_instances')
return 'instance_profile_name' in run_instances_method.func_code.co_varnames
def create_block_device(module, ec2, volume):
# Not aware of a way to determine this programatically
# http://aws.amazon.com/about-aws/whats-new/2013/10/09/ebs-provisioned-iops-maximum-iops-gb-ratio-increased-to-30-1/
MAX_IOPS_TO_SIZE_RATIO = 30
if 'snapshot' not in volume and 'ephemeral' not in volume:
if 'volume_size' not in volume:
module.fail_json(msg = 'Size must be specified when creating a new volume or modifying the root volume')
if 'snapshot' in volume:
if 'device_type' in volume and volume.get('device_type') == 'io1' and 'iops' not in volume:
module.fail_json(msg = 'io1 volumes must have an iops value set')
if 'iops' in volume:
snapshot = ec2.get_all_snapshots(snapshot_ids=[volume['snapshot']])[0]
size = volume.get('volume_size', snapshot.volume_size)
if int(volume['iops']) > MAX_IOPS_TO_SIZE_RATIO * size:
module.fail_json(msg = 'IOPS must be at most %d times greater than size' % MAX_IOPS_TO_SIZE_RATIO)
if 'ephemeral' in volume:
if 'snapshot' in volume:
module.fail_json(msg = 'Cannot set both ephemeral and snapshot')
return BlockDeviceType(snapshot_id=volume.get('snapshot'),
ephemeral_name=volume.get('ephemeral'),
size=volume.get('volume_size'),
volume_type=volume.get('device_type'),
delete_on_termination=volume.get('delete_on_termination', False),
iops=volume.get('iops'))
def create_instances(module, ec2):
"""
Creates new instances
module : AnsibleModule object
ec2: authenticated ec2 connection object
Returns:
A list of dictionaries with instance information
about the instances that were launched
"""
key_name = module.params.get('key_name')
id = module.params.get('id')
group_name = module.params.get('group')
group_id = module.params.get('group_id')
zone = module.params.get('zone')
instance_type = module.params.get('instance_type')
image = module.params.get('image')
count = module.params.get('count')
monitoring = module.params.get('monitoring')
kernel = module.params.get('kernel')
ramdisk = module.params.get('ramdisk')
wait = module.params.get('wait')
wait_timeout = int(module.params.get('wait_timeout'))
placement_group = module.params.get('placement_group')
user_data = module.params.get('user_data')
instance_tags = module.params.get('instance_tags')
vpc_subnet_id = module.params.get('vpc_subnet_id')
assign_public_ip = module.boolean(module.params.get('assign_public_ip'))
private_ip = module.params.get('private_ip')
instance_profile_name = module.params.get('instance_profile_name')
volumes = module.params.get('volumes')
# group_id and group_name are exclusive of each other
if group_id and group_name:
module.fail_json(msg = str("Use only one type of parameter (group_name) or (group_id)"))
sys.exit(1)
try:
# Here we try to lookup the group id from the security group name - if group is set.
if group_name:
grp_details = ec2.get_all_security_groups()
if type(group_name) == list:
group_id = [ str(grp.id) for grp in grp_details if str(grp.name) in group_name ]
elif type(group_name) == str:
for grp in grp_details:
if str(group_name) in str(grp):
group_id = [str(grp.id)]
group_name = [group_name]
# Now we try to lookup the group id testing if group exists.
elif group_id:
#wrap the group_id in a list if it's not one already
if type(group_id) == str:
group_id = [group_id]
grp_details = ec2.get_all_security_groups(group_ids=group_id)
grp_item = grp_details[0]
group_name = [grp_item.name]
except boto.exception.NoAuthHandlerFound, e:
module.fail_json(msg = str(e))
# Lookup any instances that much our run id.
running_instances = []
count_remaining = int(count)
if id != None:
filter_dict = {'client-token':id, 'instance-state-name' : 'running'}
previous_reservations = ec2.get_all_instances(None, filter_dict)
for res in previous_reservations:
for prev_instance in res.instances:
running_instances.append(prev_instance)
count_remaining = count_remaining - len(running_instances)
# Both min_count and max_count equal count parameter. This means the launch request is explicit (we want count, or fail) in how many instances we want.
if count_remaining == 0:
changed = False
else:
changed = True
try:
params = {'image_id': image,
'key_name': key_name,
'client_token': id,
'min_count': count_remaining,
'max_count': count_remaining,
'monitoring_enabled': monitoring,
'placement': zone,
'placement_group': placement_group,
'instance_type': instance_type,
'kernel_id': kernel,
'ramdisk_id': ramdisk,
'private_ip_address': private_ip,
'user_data': user_data}
if boto_supports_profile_name_arg(ec2):
params['instance_profile_name'] = instance_profile_name
else:
if instance_profile_name is not None:
module.fail_json(
msg="instance_profile_name parameter requires Boto version 2.5.0 or higher")
if assign_public_ip:
if not boto_supports_associate_public_ip_address(ec2):
module.fail_json(
msg="assign_public_ip parameter requires Boto version 2.13.0 or higher.")
elif not vpc_subnet_id:
module.fail_json(
msg="assign_public_ip only available with vpc_subnet_id")
else:
interface = boto.ec2.networkinterface.NetworkInterfaceSpecification(
subnet_id=vpc_subnet_id,
groups=group_id,
associate_public_ip_address=assign_public_ip)
interfaces = boto.ec2.networkinterface.NetworkInterfaceCollection(interface)
params['network_interfaces'] = interfaces
else:
params['subnet_id'] = vpc_subnet_id
if vpc_subnet_id:
params['security_group_ids'] = group_id
else:
params['security_groups'] = group_name
if volumes:
bdm = BlockDeviceMapping()
for volume in volumes:
if 'device_name' not in volume:
module.fail_json(msg = 'Device name must be set for volume')
# Minimum volume size is 1GB. We'll use volume size explicitly set to 0
# to be a signal not to create this volume
if 'volume_size' not in volume or int(volume['volume_size']) > 0:
bdm[volume['device_name']] = create_block_device(module, ec2, volume)
params['block_device_map'] = bdm
res = ec2.run_instances(**params)
except boto.exception.BotoServerError, e:
module.fail_json(msg = "%s: %s" % (e.error_code, e.error_message))
instids = [ i.id for i in res.instances ]
while True:
try:
res.connection.get_all_instances(instids)
break
except boto.exception.EC2ResponseError, e:
if "<Code>InvalidInstanceID.NotFound</Code>" in str(e):
# there's a race between start and get an instance
continue
else:
module.fail_json(msg = str(e))
if instance_tags:
try:
ec2.create_tags(instids, instance_tags)
except boto.exception.EC2ResponseError, e:
module.fail_json(msg = "%s: %s" % (e.error_code, e.error_message))
# wait here until the instances are up
this_res = []
num_running = 0
wait_timeout = time.time() + wait_timeout
while wait_timeout > time.time() and num_running < len(instids):
res_list = res.connection.get_all_instances(instids)
if len(res_list) > 0:
this_res = res_list[0]
num_running = len([ i for i in this_res.instances if i.state=='running' ])
else:
# got a bad response of some sort, possibly due to
# stale/cached data. Wait a second and then try again
time.sleep(1)
continue
if wait and num_running < len(instids):
time.sleep(5)
else:
break
if wait and wait_timeout <= time.time():
# waiting took too long
module.fail_json(msg = "wait for instances running timeout on %s" % time.asctime())
for inst in this_res.instances:
running_instances.append(inst)
instance_dict_array = []
created_instance_ids = []
for inst in running_instances:
d = get_instance_info(inst)
created_instance_ids.append(inst.id)
instance_dict_array.append(d)
return (instance_dict_array, created_instance_ids, changed)
def terminate_instances(module, ec2, instance_ids):
"""
Terminates a list of instances
module: Ansible module object
ec2: authenticated ec2 connection object
termination_list: a list of instances to terminate in the form of
[ {id: <inst-id>}, ..]
Returns a dictionary of instance information
about the instances terminated.
If the instance to be terminated is running
"changed" will be set to False.
"""
# Whether to wait for termination to complete before returning
wait = module.params.get('wait')
wait_timeout = int(module.params.get('wait_timeout'))
changed = False
instance_dict_array = []
if not isinstance(instance_ids, list) or len(instance_ids) < 1:
module.fail_json(msg='instance_ids should be a list of instances, aborting')
terminated_instance_ids = []
for res in ec2.get_all_instances(instance_ids):
for inst in res.instances:
if inst.state == 'running':
terminated_instance_ids.append(inst.id)
instance_dict_array.append(get_instance_info(inst))
try:
ec2.terminate_instances([inst.id])
except EC2ResponseError, e:
module.fail_json(msg='Unable to terminate instance {0}, error: {1}'.format(inst.id, e))
changed = True
# wait here until the instances are 'terminated'
if wait:
num_terminated = 0
wait_timeout = time.time() + wait_timeout
while wait_timeout > time.time() and num_terminated < len(terminated_instance_ids):
response = ec2.get_all_instances( \
instance_ids=terminated_instance_ids, \
filters={'instance-state-name':'terminated'})
try:
num_terminated = len(response.pop().instances)
except Exception, e:
# got a bad response of some sort, possibly due to
# stale/cached data. Wait a second and then try again
time.sleep(1)
continue
if num_terminated < len(terminated_instance_ids):
time.sleep(5)
# waiting took too long
if wait_timeout < time.time() and num_terminated < len(terminated_instance_ids):
module.fail_json(msg = "wait for instance termination timeout on %s" % time.asctime())
return (changed, instance_dict_array, terminated_instance_ids)
def startstop_instances(module, ec2, instance_ids):
"""
Starts or stops a list of existing instances
module: Ansible module object
ec2: authenticated ec2 connection object
instance_ids: The list of instances to start in the form of
[ {id: <inst-id>}, ..]
Returns a dictionary of instance information
about the instances started.
If the instance was not able to change state,
"changed" will be set to False.
"""
wait = module.params.get('wait')
wait_timeout = int(module.params.get('wait_timeout'))
changed = False
instance_dict_array = []
if not isinstance(instance_ids, list) or len(instance_ids) < 1:
module.fail_json(msg='instance_ids should be a list of instances, aborting')
dest_state = module.params.get('state')
dest_state_ec2 = 'stopped' if dest_state == 'stopped' else 'running'
# Check that our instances are not in the state we want to take them to
# and change them to our desired state
running_instances_array = []
for res in ec2.get_all_instances(instance_ids):
for inst in res.instances:
if not inst.state == dest_state_ec2:
instance_dict_array.append(get_instance_info(inst))
try:
if dest_state == 'running':
inst.start()
else:
inst.stop()
except EC2ResponseError, e:
module.fail_json(msg='Unable to change state for instance {0}, error: {1}'.format(inst.id, e))
changed = True
## Wait for all the instances to finish starting or stopping
instids = [ i.id for i in res.instances ]
this_res = []
num_running = 0
wait_timeout = time.time() + wait_timeout
while wait_timeout > time.time() and num_running < len(instids):
res_list = res.connection.get_all_instances(instids)
if len(res_list) > 0:
this_res = res_list[0]
num_running = len([ i for i in this_res.instances if i.state == dest_state_ec2 ])
else:
# got a bad response of some sort, possibly due to
# stale/cached data. Wait a second and then try again
time.sleep(1)
continue
if wait and num_running < len(instids):
time.sleep(5)
else:
break
if wait and wait_timeout <= time.time():
# waiting took too long
module.fail_json(msg = "wait for instances running timeout on %s" % time.asctime())
for inst in this_res.instances:
running_instances_array.append(inst.id)
return (changed, instance_dict_array, running_instances_array)
def main():
argument_spec = ec2_argument_spec()
argument_spec.update(dict(
key_name = dict(aliases = ['keypair']),
id = dict(),
group = dict(type='list'),
group_id = dict(type='list'),
zone = dict(aliases=['aws_zone', 'ec2_zone']),
instance_type = dict(aliases=['type']),
image = dict(),
kernel = dict(),
count = dict(default='1'),
monitoring = dict(type='bool', default=False),
ramdisk = dict(),
wait = dict(type='bool', default=False),
wait_timeout = dict(default=300),
placement_group = dict(),
user_data = dict(),
instance_tags = dict(type='dict'),
vpc_subnet_id = dict(),
assign_public_ip = dict(type='bool', default=False),
private_ip = dict(),
instance_profile_name = dict(),
instance_ids = dict(type='list'),
state = dict(default='present'),
volumes = dict(type='list'),
)
)
module = AnsibleModule(argument_spec=argument_spec)
ec2 = ec2_connect(module)
if module.params.get('state') == 'absent':
instance_ids = module.params.get('instance_ids')
if not isinstance(instance_ids, list):
module.fail_json(msg='termination_list needs to be a list of instances to terminate')
(changed, instance_dict_array, new_instance_ids) = terminate_instances(module, ec2, instance_ids)
elif module.params.get('state') == 'running' or module.params.get('state') == 'stopped':
instance_ids = module.params.get('instance_ids')
if not isinstance(instance_ids, list):
module.fail_json(msg='running list needs to be a list of instances to run: %s' % instance_ids)
(changed, instance_dict_array, new_instance_ids) = startstop_instances(module, ec2, instance_ids)
elif module.params.get('state') == 'present':
# Changed is always set to true when provisioning new instances
if not module.params.get('image'):
module.fail_json(msg='image parameter is required for new instance')
(instance_dict_array, new_instance_ids, changed) = create_instances(module, ec2)
module.exit_json(changed=changed, instance_ids=new_instance_ids, instances=instance_dict_array)
# import module snippets
from ansible.module_utils.basic import *
from ansible.module_utils.ec2 import *
main()
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