Current File : //proc/self/root/lib/python2.7/site-packages/ansible/modules/core/cloud/amazon/ec2_asg.py
#!/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_asg
short_description: Create or delete AWS Autoscaling Groups
description:
- Can create or delete AWS Autoscaling Groups
- Works with the ec2_lc module to manage Launch Configurations
version_added: "1.6"
author: "Gareth Rushgrove (@garethr)"
options:
state:
description:
- register or deregister the instance
required: false
choices: ['present', 'absent']
default: present
name:
description:
- Unique name for group to be created or deleted
required: true
load_balancers:
description:
- List of ELB names to use for the group
required: false
availability_zones:
description:
- List of availability zone names in which to create the group. Defaults to all the availability zones in the region if vpc_zone_identifier is not set.
required: false
launch_config_name:
description:
- Name of the Launch configuration to use for the group. See the ec2_lc module for managing these.
required: true
min_size:
description:
- Minimum number of instances in group, if unspecified then the current group value will be used.
required: false
max_size:
description:
- Maximum number of instances in group, if unspecified then the current group value will be used.
required: false
desired_capacity:
description:
- Desired number of instances in group, if unspecified then the current group value will be used.
required: false
replace_all_instances:
description:
- In a rolling fashion, replace all instances with an old launch configuration with one from the current launch configuration.
required: false
version_added: "1.8"
default: False
replace_batch_size:
description:
- Number of instances you'd like to replace at a time. Used with replace_all_instances.
required: false
version_added: "1.8"
default: 1
replace_instances:
description:
- List of instance_ids belonging to the named ASG that you would like to terminate and be replaced with instances matching the current launch configuration.
required: false
version_added: "1.8"
default: None
lc_check:
description:
- Check to make sure instances that are being replaced with replace_instances do not already have the current launch_config.
required: false
version_added: "1.8"
default: True
vpc_zone_identifier:
description:
- List of VPC subnets to use
required: false
default: None
tags:
description:
- A list of tags to add to the Auto Scale Group. Optional key is 'propagate_at_launch', which defaults to true.
required: false
default: None
version_added: "1.7"
health_check_period:
description:
- Length of time in seconds after a new EC2 instance comes into service that Auto Scaling starts checking its health.
required: false
default: 500 seconds
version_added: "1.7"
health_check_type:
description:
- The service you want the health status from, Amazon EC2 or Elastic Load Balancer.
required: false
default: EC2
version_added: "1.7"
choices: ['EC2', 'ELB']
default_cooldown:
description:
- The number of seconds after a scaling activity completes before another can begin.
required: false
default: 300 seconds
version_added: "2.0"
wait_timeout:
description:
- how long before wait instances to become viable when replaced. Used in conjunction with instance_ids option.
default: 300
version_added: "1.8"
wait_for_instances:
description:
- Wait for the ASG instances to be in a ready state before exiting. If instances are behind an ELB, it will wait until the ELB determines all instances have a lifecycle_state of "InService" and a health_status of "Healthy".
version_added: "1.9"
default: yes
required: False
termination_policies:
description:
- An ordered list of criteria used for selecting instances to be removed from the Auto Scaling group when reducing capacity.
- For 'Default', when used to create a new autoscaling group, the "Default"i value is used. When used to change an existent autoscaling group, the current termination policies are maintained.
required: false
default: Default
choices: ['OldestInstance', 'NewestInstance', 'OldestLaunchConfiguration', 'ClosestToNextInstanceHour', 'Default']
version_added: "2.0"
notification_topic:
description:
- A SNS topic ARN to send auto scaling notifications to.
default: None
required: false
version_added: "2.2"
notification_types:
description:
- A list of auto scaling events to trigger notifications on.
default: ['autoscaling:EC2_INSTANCE_LAUNCH', 'autoscaling:EC2_INSTANCE_LAUNCH_ERROR', 'autoscaling:EC2_INSTANCE_TERMINATE', 'autoscaling:EC2_INSTANCE_TERMINATE_ERROR']
required: false
version_added: "2.2"
extends_documentation_fragment:
- aws
- ec2
"""
EXAMPLES = '''
# Basic configuration
- ec2_asg:
name: special
load_balancers: [ 'lb1', 'lb2' ]
availability_zones: [ 'eu-west-1a', 'eu-west-1b' ]
launch_config_name: 'lc-1'
min_size: 1
max_size: 10
desired_capacity: 5
vpc_zone_identifier: [ 'subnet-abcd1234', 'subnet-1a2b3c4d' ]
tags:
- environment: production
propagate_at_launch: no
# Rolling ASG Updates
Below is an example of how to assign a new launch config to an ASG and terminate old instances.
All instances in "myasg" that do not have the launch configuration named "my_new_lc" will be terminated in
a rolling fashion with instances using the current launch configuration, "my_new_lc".
This could also be considered a rolling deploy of a pre-baked AMI.
If this is a newly created group, the instances will not be replaced since all instances
will have the current launch configuration.
- name: create launch config
ec2_lc:
name: my_new_lc
image_id: ami-lkajsf
key_name: mykey
region: us-east-1
security_groups: sg-23423
instance_type: m1.small
assign_public_ip: yes
- ec2_asg:
name: myasg
launch_config_name: my_new_lc
health_check_period: 60
health_check_type: ELB
replace_all_instances: yes
min_size: 5
max_size: 5
desired_capacity: 5
region: us-east-1
To only replace a couple of instances instead of all of them, supply a list
to "replace_instances":
- ec2_asg:
name: myasg
launch_config_name: my_new_lc
health_check_period: 60
health_check_type: ELB
replace_instances:
- i-b345231
- i-24c2931
min_size: 5
max_size: 5
desired_capacity: 5
region: us-east-1
'''
import time
import logging as log
import traceback
from ansible.module_utils.basic import *
from ansible.module_utils.ec2 import *
log.getLogger('boto').setLevel(log.CRITICAL)
#log.basicConfig(filename='/tmp/ansible_ec2_asg.log',level=log.DEBUG, format='%(asctime)s: %(message)s', datefmt='%m/%d/%Y %I:%M:%S %p')
try:
import boto.ec2.autoscale
from boto.ec2.autoscale import AutoScaleConnection, AutoScalingGroup, Tag
from boto.exception import BotoServerError
HAS_BOTO = True
except ImportError:
HAS_BOTO = False
ASG_ATTRIBUTES = ('availability_zones', 'default_cooldown', 'desired_capacity',
'health_check_period', 'health_check_type', 'launch_config_name',
'load_balancers', 'max_size', 'min_size', 'name', 'placement_group',
'termination_policies', 'vpc_zone_identifier')
INSTANCE_ATTRIBUTES = ('instance_id', 'health_status', 'lifecycle_state', 'launch_config_name')
def enforce_required_arguments(module):
''' As many arguments are not required for autoscale group deletion
they cannot be mandatory arguments for the module, so we enforce
them here '''
missing_args = []
for arg in ('min_size', 'max_size', 'launch_config_name'):
if module.params[arg] is None:
missing_args.append(arg)
if missing_args:
module.fail_json(msg="Missing required arguments for autoscaling group create/update: %s" % ",".join(missing_args))
def get_properties(autoscaling_group):
properties = dict((attr, getattr(autoscaling_group, attr)) for attr in ASG_ATTRIBUTES)
# Ugly hack to make this JSON-serializable. We take a list of boto Tag
# objects and replace them with a dict-representation. Needed because the
# tags are included in ansible's return value (which is jsonified)
if 'tags' in properties and isinstance(properties['tags'], list):
serializable_tags = {}
for tag in properties['tags']:
serializable_tags[tag.key] = [tag.value, tag.propagate_at_launch]
properties['tags'] = serializable_tags
properties['healthy_instances'] = 0
properties['in_service_instances'] = 0
properties['unhealthy_instances'] = 0
properties['pending_instances'] = 0
properties['viable_instances'] = 0
properties['terminating_instances'] = 0
instance_facts = {}
if autoscaling_group.instances:
properties['instances'] = [i.instance_id for i in autoscaling_group.instances]
for i in autoscaling_group.instances:
instance_facts[i.instance_id] = {'health_status': i.health_status,
'lifecycle_state': i.lifecycle_state,
'launch_config_name': i.launch_config_name }
if i.health_status == 'Healthy' and i.lifecycle_state == 'InService':
properties['viable_instances'] += 1
if i.health_status == 'Healthy':
properties['healthy_instances'] += 1
else:
properties['unhealthy_instances'] += 1
if i.lifecycle_state == 'InService':
properties['in_service_instances'] += 1
if i.lifecycle_state == 'Terminating':
properties['terminating_instances'] += 1
if i.lifecycle_state == 'Pending':
properties['pending_instances'] += 1
properties['instance_facts'] = instance_facts
properties['load_balancers'] = autoscaling_group.load_balancers
if getattr(autoscaling_group, "tags", None):
properties['tags'] = dict((t.key, t.value) for t in autoscaling_group.tags)
return properties
def elb_dreg(asg_connection, module, group_name, instance_id):
region, ec2_url, aws_connect_params = get_aws_connection_info(module)
as_group = asg_connection.get_all_groups(names=[group_name])[0]
wait_timeout = module.params.get('wait_timeout')
props = get_properties(as_group)
count = 1
if as_group.load_balancers and as_group.health_check_type == 'ELB':
try:
elb_connection = connect_to_aws(boto.ec2.elb, region, **aws_connect_params)
except boto.exception.NoAuthHandlerFound as e:
module.fail_json(msg=str(e))
else:
return
for lb in as_group.load_balancers:
elb_connection.deregister_instances(lb, instance_id)
log.debug("De-registering {0} from ELB {1}".format(instance_id, lb))
wait_timeout = time.time() + wait_timeout
while wait_timeout > time.time() and count > 0:
count = 0
for lb in as_group.load_balancers:
lb_instances = elb_connection.describe_instance_health(lb)
for i in lb_instances:
if i.instance_id == instance_id and i.state == "InService":
count += 1
log.debug("{0}: {1}, {2}".format(i.instance_id, i.state, i.description))
time.sleep(10)
if wait_timeout <= time.time():
# waiting took too long
module.fail_json(msg = "Waited too long for instance to deregister. {0}".format(time.asctime()))
def elb_healthy(asg_connection, elb_connection, module, group_name):
healthy_instances = set()
as_group = asg_connection.get_all_groups(names=[group_name])[0]
props = get_properties(as_group)
# get healthy, inservice instances from ASG
instances = []
for instance, settings in props['instance_facts'].items():
if settings['lifecycle_state'] == 'InService' and settings['health_status'] == 'Healthy':
instances.append(instance)
log.debug("ASG considers the following instances InService and Healthy: {0}".format(instances))
log.debug("ELB instance status:")
for lb in as_group.load_balancers:
# we catch a race condition that sometimes happens if the instance exists in the ASG
# but has not yet show up in the ELB
try:
lb_instances = elb_connection.describe_instance_health(lb, instances=instances)
except boto.exception.BotoServerError as e:
if e.error_code == 'InvalidInstance':
return None
module.fail_json(msg=str(e))
for i in lb_instances:
if i.state == "InService":
healthy_instances.add(i.instance_id)
log.debug("{0}: {1}".format(i.instance_id, i.state))
return len(healthy_instances)
def wait_for_elb(asg_connection, module, group_name):
region, ec2_url, aws_connect_params = get_aws_connection_info(module)
wait_timeout = module.params.get('wait_timeout')
# if the health_check_type is ELB, we want to query the ELBs directly for instance
# status as to avoid health_check_grace period that is awarded to ASG instances
as_group = asg_connection.get_all_groups(names=[group_name])[0]
if as_group.load_balancers and as_group.health_check_type == 'ELB':
log.debug("Waiting for ELB to consider instances healthy.")
try:
elb_connection = connect_to_aws(boto.ec2.elb, region, **aws_connect_params)
except boto.exception.NoAuthHandlerFound as e:
module.fail_json(msg=str(e))
wait_timeout = time.time() + wait_timeout
healthy_instances = elb_healthy(asg_connection, elb_connection, module, group_name)
while healthy_instances < as_group.min_size and wait_timeout > time.time():
healthy_instances = elb_healthy(asg_connection, elb_connection, module, group_name)
log.debug("ELB thinks {0} instances are healthy.".format(healthy_instances))
time.sleep(10)
if wait_timeout <= time.time():
# waiting took too long
module.fail_json(msg = "Waited too long for ELB instances to be healthy. %s" % time.asctime())
log.debug("Waiting complete. ELB thinks {0} instances are healthy.".format(healthy_instances))
def create_autoscaling_group(connection, module):
group_name = module.params.get('name')
load_balancers = module.params['load_balancers']
availability_zones = module.params['availability_zones']
launch_config_name = module.params.get('launch_config_name')
min_size = module.params['min_size']
max_size = module.params['max_size']
desired_capacity = module.params.get('desired_capacity')
vpc_zone_identifier = module.params.get('vpc_zone_identifier')
set_tags = module.params.get('tags')
health_check_period = module.params.get('health_check_period')
health_check_type = module.params.get('health_check_type')
default_cooldown = module.params.get('default_cooldown')
wait_for_instances = module.params.get('wait_for_instances')
as_groups = connection.get_all_groups(names=[group_name])
wait_timeout = module.params.get('wait_timeout')
termination_policies = module.params.get('termination_policies')
notification_topic = module.params.get('notification_topic')
notification_types = module.params.get('notification_types')
if not vpc_zone_identifier and not availability_zones:
region, ec2_url, aws_connect_params = get_aws_connection_info(module)
try:
ec2_connection = connect_to_aws(boto.ec2, region, **aws_connect_params)
except (boto.exception.NoAuthHandlerFound, AnsibleAWSError) as e:
module.fail_json(msg=str(e))
elif vpc_zone_identifier:
vpc_zone_identifier = ','.join(vpc_zone_identifier)
asg_tags = []
for tag in set_tags:
for k,v in tag.items():
if k !='propagate_at_launch':
asg_tags.append(Tag(key=k,
value=v,
propagate_at_launch=bool(tag.get('propagate_at_launch', True)),
resource_id=group_name))
if not as_groups:
if not vpc_zone_identifier and not availability_zones:
availability_zones = module.params['availability_zones'] = [zone.name for zone in ec2_connection.get_all_zones()]
enforce_required_arguments(module)
launch_configs = connection.get_all_launch_configurations(names=[launch_config_name])
ag = AutoScalingGroup(
group_name=group_name,
load_balancers=load_balancers,
availability_zones=availability_zones,
launch_config=launch_configs[0],
min_size=min_size,
max_size=max_size,
desired_capacity=desired_capacity,
vpc_zone_identifier=vpc_zone_identifier,
connection=connection,
tags=asg_tags,
health_check_period=health_check_period,
health_check_type=health_check_type,
default_cooldown=default_cooldown,
termination_policies=termination_policies)
try:
connection.create_auto_scaling_group(ag)
if wait_for_instances:
wait_for_new_inst(module, connection, group_name, wait_timeout, desired_capacity, 'viable_instances')
wait_for_elb(connection, module, group_name)
if notification_topic:
ag.put_notification_configuration(notification_topic, notification_types)
as_group = connection.get_all_groups(names=[group_name])[0]
asg_properties = get_properties(as_group)
changed = True
return(changed, asg_properties)
except BotoServerError as e:
module.fail_json(msg="Failed to create Autoscaling Group: %s" % str(e), exception=traceback.format_exc(e))
else:
as_group = as_groups[0]
changed = False
for attr in ASG_ATTRIBUTES:
if module.params.get(attr, None) is not None:
module_attr = module.params.get(attr)
if attr == 'vpc_zone_identifier':
module_attr = ','.join(module_attr)
group_attr = getattr(as_group, attr)
# we do this because AWS and the module may return the same list
# sorted differently
if attr != 'termination_policies':
try:
module_attr.sort()
except:
pass
try:
group_attr.sort()
except:
pass
if group_attr != module_attr:
changed = True
setattr(as_group, attr, module_attr)
if len(set_tags) > 0:
have_tags = {}
want_tags = {}
for tag in asg_tags:
want_tags[tag.key] = [tag.value, tag.propagate_at_launch]
dead_tags = []
for tag in as_group.tags:
have_tags[tag.key] = [tag.value, tag.propagate_at_launch]
if tag.key not in want_tags:
changed = True
dead_tags.append(tag)
if dead_tags != []:
connection.delete_tags(dead_tags)
if have_tags != want_tags:
changed = True
connection.create_or_update_tags(asg_tags)
# handle loadbalancers separately because None != []
load_balancers = module.params.get('load_balancers') or []
if load_balancers and as_group.load_balancers != load_balancers:
changed = True
as_group.load_balancers = module.params.get('load_balancers')
if changed:
try:
as_group.update()
except BotoServerError as e:
module.fail_json(msg="Failed to update Autoscaling Group: %s" % str(e), exception=traceback.format_exc(e))
if notification_topic:
try:
as_group.put_notification_configuration(notification_topic, notification_types)
except BotoServerError as e:
module.fail_json(msg="Failed to update Autoscaling Group notifications: %s" % str(e), exception=traceback.format_exc(e))
if wait_for_instances:
wait_for_new_inst(module, connection, group_name, wait_timeout, desired_capacity, 'viable_instances')
wait_for_elb(connection, module, group_name)
try:
as_group = connection.get_all_groups(names=[group_name])[0]
asg_properties = get_properties(as_group)
except BotoServerError as e:
module.fail_json(msg="Failed to read existing Autoscaling Groups: %s" % str(e), exception=traceback.format_exc(e))
return(changed, asg_properties)
def delete_autoscaling_group(connection, module):
group_name = module.params.get('name')
notification_topic = module.params.get('notification_topic')
if notification_topic:
ag.delete_notification_configuration(notification_topic)
groups = connection.get_all_groups(names=[group_name])
if groups:
group = groups[0]
group.max_size = 0
group.min_size = 0
group.desired_capacity = 0
group.update()
instances = True
while instances:
tmp_groups = connection.get_all_groups(names=[group_name])
if tmp_groups:
tmp_group = tmp_groups[0]
if not tmp_group.instances:
instances = False
time.sleep(10)
group.delete()
while len(connection.get_all_groups(names=[group_name])):
time.sleep(5)
changed=True
return changed
else:
changed=False
return changed
def get_chunks(l, n):
for i in xrange(0, len(l), n):
yield l[i:i+n]
def update_size(group, max_size, min_size, dc):
log.debug("setting ASG sizes")
log.debug("minimum size: {0}, desired_capacity: {1}, max size: {2}".format(min_size, dc, max_size ))
group.max_size = max_size
group.min_size = min_size
group.desired_capacity = dc
group.update()
def replace(connection, module):
batch_size = module.params.get('replace_batch_size')
wait_timeout = module.params.get('wait_timeout')
group_name = module.params.get('name')
max_size = module.params.get('max_size')
min_size = module.params.get('min_size')
desired_capacity = module.params.get('desired_capacity')
lc_check = module.params.get('lc_check')
replace_instances = module.params.get('replace_instances')
as_group = connection.get_all_groups(names=[group_name])[0]
wait_for_new_inst(module, connection, group_name, wait_timeout, as_group.min_size, 'viable_instances')
props = get_properties(as_group)
instances = props['instances']
if replace_instances:
instances = replace_instances
# check to see if instances are replaceable if checking launch configs
new_instances, old_instances = get_instances_by_lc(props, lc_check, instances)
num_new_inst_needed = desired_capacity - len(new_instances)
if lc_check:
if num_new_inst_needed == 0 and old_instances:
log.debug("No new instances needed, but old instances are present. Removing old instances")
terminate_batch(connection, module, old_instances, instances, True)
as_group = connection.get_all_groups(names=[group_name])[0]
props = get_properties(as_group)
changed = True
return(changed, props)
# we don't want to spin up extra instances if not necessary
if num_new_inst_needed < batch_size:
log.debug("Overriding batch size to {0}".format(num_new_inst_needed))
batch_size = num_new_inst_needed
if not old_instances:
changed = False
return(changed, props)
#check if min_size/max_size/desired capacity have been specified and if not use ASG values
if min_size is None:
min_size = as_group.min_size
if max_size is None:
max_size = as_group.max_size
if desired_capacity is None:
desired_capacity = as_group.desired_capacity
# set temporary settings and wait for them to be reached
# This should get overwritten if the number of instances left is less than the batch size.
as_group = connection.get_all_groups(names=[group_name])[0]
update_size(as_group, max_size + batch_size, min_size + batch_size, desired_capacity + batch_size)
wait_for_new_inst(module, connection, group_name, wait_timeout, as_group.min_size, 'viable_instances')
wait_for_elb(connection, module, group_name)
as_group = connection.get_all_groups(names=[group_name])[0]
props = get_properties(as_group)
instances = props['instances']
if replace_instances:
instances = replace_instances
log.debug("beginning main loop")
for i in get_chunks(instances, batch_size):
# break out of this loop if we have enough new instances
break_early, desired_size, term_instances = terminate_batch(connection, module, i, instances, False)
wait_for_term_inst(connection, module, term_instances)
wait_for_new_inst(module, connection, group_name, wait_timeout, desired_size, 'viable_instances')
wait_for_elb(connection, module, group_name)
as_group = connection.get_all_groups(names=[group_name])[0]
if break_early:
log.debug("breaking loop")
break
update_size(as_group, max_size, min_size, desired_capacity)
as_group = connection.get_all_groups(names=[group_name])[0]
asg_properties = get_properties(as_group)
log.debug("Rolling update complete.")
changed=True
return(changed, asg_properties)
def get_instances_by_lc(props, lc_check, initial_instances):
new_instances = []
old_instances = []
# old instances are those that have the old launch config
if lc_check:
for i in props['instances']:
if props['instance_facts'][i]['launch_config_name'] == props['launch_config_name']:
new_instances.append(i)
else:
old_instances.append(i)
else:
log.debug("Comparing initial instances with current: {0}".format(initial_instances))
for i in props['instances']:
if i not in initial_instances:
new_instances.append(i)
else:
old_instances.append(i)
log.debug("New instances: {0}, {1}".format(len(new_instances), new_instances))
log.debug("Old instances: {0}, {1}".format(len(old_instances), old_instances))
return new_instances, old_instances
def list_purgeable_instances(props, lc_check, replace_instances, initial_instances):
instances_to_terminate = []
instances = ( inst_id for inst_id in replace_instances if inst_id in props['instances'])
# check to make sure instances given are actually in the given ASG
# and they have a non-current launch config
if lc_check:
for i in instances:
if props['instance_facts'][i]['launch_config_name'] != props['launch_config_name']:
instances_to_terminate.append(i)
else:
for i in instances:
if i in initial_instances:
instances_to_terminate.append(i)
return instances_to_terminate
def terminate_batch(connection, module, replace_instances, initial_instances, leftovers=False):
batch_size = module.params.get('replace_batch_size')
min_size = module.params.get('min_size')
desired_capacity = module.params.get('desired_capacity')
group_name = module.params.get('name')
wait_timeout = int(module.params.get('wait_timeout'))
lc_check = module.params.get('lc_check')
decrement_capacity = False
break_loop = False
as_group = connection.get_all_groups(names=[group_name])[0]
props = get_properties(as_group)
desired_size = as_group.min_size
new_instances, old_instances = get_instances_by_lc(props, lc_check, initial_instances)
num_new_inst_needed = desired_capacity - len(new_instances)
# check to make sure instances given are actually in the given ASG
# and they have a non-current launch config
instances_to_terminate = list_purgeable_instances(props, lc_check, replace_instances, initial_instances)
log.debug("new instances needed: {0}".format(num_new_inst_needed))
log.debug("new instances: {0}".format(new_instances))
log.debug("old instances: {0}".format(old_instances))
log.debug("batch instances: {0}".format(",".join(instances_to_terminate)))
if num_new_inst_needed == 0:
decrement_capacity = True
if as_group.min_size != min_size:
as_group.min_size = min_size
as_group.update()
log.debug("Updating minimum size back to original of {0}".format(min_size))
#if are some leftover old instances, but we are already at capacity with new ones
# we don't want to decrement capacity
if leftovers:
decrement_capacity = False
break_loop = True
instances_to_terminate = old_instances
desired_size = min_size
log.debug("No new instances needed")
if num_new_inst_needed < batch_size and num_new_inst_needed !=0 :
instances_to_terminate = instances_to_terminate[:num_new_inst_needed]
decrement_capacity = False
break_loop = False
log.debug("{0} new instances needed".format(num_new_inst_needed))
log.debug("decrementing capacity: {0}".format(decrement_capacity))
for instance_id in instances_to_terminate:
elb_dreg(connection, module, group_name, instance_id)
log.debug("terminating instance: {0}".format(instance_id))
connection.terminate_instance(instance_id, decrement_capacity=decrement_capacity)
# we wait to make sure the machines we marked as Unhealthy are
# no longer in the list
return break_loop, desired_size, instances_to_terminate
def wait_for_term_inst(connection, module, term_instances):
batch_size = module.params.get('replace_batch_size')
wait_timeout = module.params.get('wait_timeout')
group_name = module.params.get('name')
lc_check = module.params.get('lc_check')
as_group = connection.get_all_groups(names=[group_name])[0]
props = get_properties(as_group)
count = 1
wait_timeout = time.time() + wait_timeout
while wait_timeout > time.time() and count > 0:
log.debug("waiting for instances to terminate")
count = 0
as_group = connection.get_all_groups(names=[group_name])[0]
props = get_properties(as_group)
instance_facts = props['instance_facts']
instances = ( i for i in instance_facts if i in term_instances)
for i in instances:
lifecycle = instance_facts[i]['lifecycle_state']
health = instance_facts[i]['health_status']
log.debug("Instance {0} has state of {1},{2}".format(i,lifecycle,health ))
if lifecycle == 'Terminating' or health == 'Unhealthy':
count += 1
time.sleep(10)
if wait_timeout <= time.time():
# waiting took too long
module.fail_json(msg = "Waited too long for old instances to terminate. %s" % time.asctime())
def wait_for_new_inst(module, connection, group_name, wait_timeout, desired_size, prop):
# make sure we have the latest stats after that last loop.
as_group = connection.get_all_groups(names=[group_name])[0]
props = get_properties(as_group)
log.debug("Waiting for {0} = {1}, currently {2}".format(prop, desired_size, props[prop]))
# now we make sure that we have enough instances in a viable state
wait_timeout = time.time() + wait_timeout
while wait_timeout > time.time() and desired_size > props[prop]:
log.debug("Waiting for {0} = {1}, currently {2}".format(prop, desired_size, props[prop]))
time.sleep(10)
as_group = connection.get_all_groups(names=[group_name])[0]
props = get_properties(as_group)
if wait_timeout <= time.time():
# waiting took too long
module.fail_json(msg = "Waited too long for new instances to become viable. %s" % time.asctime())
log.debug("Reached {0}: {1}".format(prop, desired_size))
return props
def main():
argument_spec = ec2_argument_spec()
argument_spec.update(
dict(
name=dict(required=True, type='str'),
load_balancers=dict(type='list'),
availability_zones=dict(type='list'),
launch_config_name=dict(type='str'),
min_size=dict(type='int'),
max_size=dict(type='int'),
desired_capacity=dict(type='int'),
vpc_zone_identifier=dict(type='list'),
replace_batch_size=dict(type='int', default=1),
replace_all_instances=dict(type='bool', default=False),
replace_instances=dict(type='list', default=[]),
lc_check=dict(type='bool', default=True),
wait_timeout=dict(type='int', default=300),
state=dict(default='present', choices=['present', 'absent']),
tags=dict(type='list', default=[]),
health_check_period=dict(type='int', default=300),
health_check_type=dict(default='EC2', choices=['EC2', 'ELB']),
default_cooldown=dict(type='int', default=300),
wait_for_instances=dict(type='bool', default=True),
termination_policies=dict(type='list', default='Default'),
notification_topic=dict(type='str', default=None),
notification_types=dict(type='list', default=[
'autoscaling:EC2_INSTANCE_LAUNCH',
'autoscaling:EC2_INSTANCE_LAUNCH_ERROR',
'autoscaling:EC2_INSTANCE_TERMINATE',
'autoscaling:EC2_INSTANCE_TERMINATE_ERROR'
])
),
)
module = AnsibleModule(
argument_spec=argument_spec,
mutually_exclusive = [['replace_all_instances', 'replace_instances']]
)
if not HAS_BOTO:
module.fail_json(msg='boto required for this module')
state = module.params.get('state')
replace_instances = module.params.get('replace_instances')
replace_all_instances = module.params.get('replace_all_instances')
region, ec2_url, aws_connect_params = get_aws_connection_info(module)
try:
connection = connect_to_aws(boto.ec2.autoscale, region, **aws_connect_params)
if not connection:
module.fail_json(msg="failed to connect to AWS for the given region: %s" % str(region))
except boto.exception.NoAuthHandlerFound as e:
module.fail_json(msg=str(e))
changed = create_changed = replace_changed = False
if state == 'present':
create_changed, asg_properties=create_autoscaling_group(connection, module)
elif state == 'absent':
changed = delete_autoscaling_group(connection, module)
module.exit_json( changed = changed )
if replace_all_instances or replace_instances:
replace_changed, asg_properties=replace(connection, module)
if create_changed or replace_changed:
changed = True
module.exit_json( changed = changed, **asg_properties )
if __name__ == '__main__':
main()
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