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ansible/cloud/ec2
Lester Wade 7984891d36 Added IAM role support
2013-07-16 13:31:30 +01:00

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Python
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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 or terminate 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: true
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.
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 to use with the instance
required: false
default: null
aliases: []
region:
version_added: "1.2"
description:
- the EC2 region to use
required: false
default: null
aliases: []
zone:
version_added: "1.2"
description:
- availability zone in which to launch the instance
required: false
default: null
aliases: []
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)
required: false
default: null
aliases: []
ec2_secret_key:
description:
- ec2 secret key
required: false
default: null
aliases: []
ec2_access_key:
description:
- ec2 access key
required: false
default: null
aliases: []
count:
description:
- number of instances to launch
required: False
default: 1
aliases: []
monitor:
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: []
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
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: []
requirements: [ "boto" ]
author: Seth Vidal, Tim Gerla, Lester Wade
'''
EXAMPLES = '''
# 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'
# 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'
# 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'
# 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}}
'''
import sys
import time
try:
import boto.ec2
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
"""
return({
'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,
'virtualization_type': inst.virtualization_type,
'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
})
def create_instances(module, ec2):
"""
Creates new instances
module : AnsbileModule 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')
private_ip = module.params.get('private_ip')
instance_profile_name = module.params.get('instance_profile_name')
# Here we try to lookup the group name from the security group id - if group_id is set.
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 = list(filter(lambda grp: str(grp.id) if str(tmp) in str(grp) else None, grp_details) for tmp 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:
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:
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,
'subnet_id': vpc_subnet_id,
'private_ip_address': private_ip,
'user_data': user_data,
'instance_profile_name': instance_profile_name}
if vpc_subnet_id:
params['security_group_ids'] = group_id
else:
params['security_groups'] = group_name
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 as 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, module.from_json(instance_tags))
except boto.exception.EC2ResponseError as e:
module.fail_json(msg = "%s: %s" % (e.error_code, e.error_message))
# wait here until the instances are up
res_list = res.connection.get_all_instances(instids)
this_res = res_list[0]
num_running = 0
wait_timeout = time.time() + wait_timeout
while wait and wait_timeout > time.time() and num_running < len(instids):
res_list = res.connection.get_all_instances(instids)
this_res = res_list[0]
num_running = len([ i for i in this_res.instances if i.state=='running' ])
time.sleep(5)
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)
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.
"""
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 as e:
module.fail_json(msg='Unable to terminate instance {0}, error: {1}'.format(inst.id, e))
changed = True
return (changed, instance_dict_array, terminated_instance_ids)
def main():
module = AnsibleModule(
argument_spec = dict(
key_name = dict(aliases = ['keypair']),
id = dict(),
group = dict(type='list'),
group_id = dict(),
region = dict(choices=['eu-west-1', 'sa-east-1', 'us-east-1', 'ap-northeast-1', 'us-west-2', 'us-west-1', 'ap-southeast-1', 'ap-southeast-2']),
zone = dict(),
instance_type = dict(aliases=['type']),
image = dict(),
kernel = dict(),
count = dict(default='1'),
monitoring = dict(choices=BOOLEANS, default=False),
ramdisk = dict(),
wait = dict(choices=BOOLEANS, default=False),
wait_timeout = dict(default=300),
ec2_url = dict(aliases=['EC2_URL']),
ec2_secret_key = dict(aliases=['EC2_SECRET_KEY'], no_log=True),
ec2_access_key = dict(aliases=['EC2_ACCESS_KEY']),
placement_group = dict(),
user_data = dict(),
instance_tags = dict(),
vpc_subnet_id = dict(),
private_ip = dict(),
instance_profile_name = dict(),
instance_ids = dict(type='list'),
state = dict(default='present'),
)
)
ec2_url = module.params.get('ec2_url')
ec2_secret_key = module.params.get('ec2_secret_key')
ec2_access_key = module.params.get('ec2_access_key')
region = module.params.get('region')
termination_list = module.params.get('termination_list')
# allow eucarc environment variables to be used if ansible vars aren't set
if not ec2_url and 'EC2_URL' in os.environ:
ec2_url = os.environ['EC2_URL']
if not ec2_secret_key and 'EC2_SECRET_KEY' in os.environ:
ec2_secret_key = os.environ['EC2_SECRET_KEY']
if not ec2_access_key and 'EC2_ACCESS_KEY' in os.environ:
ec2_access_key = os.environ['EC2_ACCESS_KEY']
# If we have a region specified, connect to its endpoint.
if region:
try:
ec2 = boto.ec2.connect_to_region(region, aws_access_key_id=ec2_access_key, aws_secret_access_key=ec2_secret_key)
except boto.exception.NoAuthHandlerFound, e:
module.fail_json(msg = str(e))
# Otherwise, no region so we fallback to the old connection method
else:
try:
if ec2_url: # if we have an URL set, connect to the specified endpoint
ec2 = boto.connect_ec2_endpoint(ec2_url, ec2_access_key, ec2_secret_key)
else: # otherwise it's Amazon.
ec2 = boto.connect_ec2(ec2_access_key, ec2_secret_key)
except boto.exception.NoAuthHandlerFound, e:
module.fail_json(msg = str(e))
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') == 'present':
# Changed is always set to true when provisioning new instances
changed = True
if not module.params.get('key_name'):
module.fail_json(msg='key_name parameter is required for new instance')
if not module.params.get('image'):
module.fail_json(msg='image parameter is required for new instance')
(instance_dict_array, new_instance_ids) = create_instances(module, ec2)
module.exit_json(changed=True, instance_ids=new_instance_ids, instances=instance_dict_array)
# this is magic, see lib/ansible/module_common.py
#<<INCLUDE_ANSIBLE_MODULE_COMMON>>
main()
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