mirror of https://github.com/ansible/ansible.git
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
378 lines
12 KiB
Python
378 lines
12 KiB
Python
#!/usr/bin/python -tt
|
|
|
|
'''
|
|
EC2 external inventory script
|
|
=================================
|
|
|
|
Generates inventory that Ansible can understand by making API request to
|
|
AWS EC2 using the Boto library.
|
|
|
|
NOTE: This script assumes Ansible is being executed where the environment
|
|
variables needed for Boto have already been set:
|
|
export AWS_ACCESS_KEY_ID='AK123'
|
|
export AWS_SECRET_ACCESS_KEY='abc123'
|
|
|
|
For more details, see: http://docs.pythonboto.org/en/latest/boto_config_tut.html
|
|
|
|
When run against a specific host, this script returns the following variables:
|
|
- ec2_ami_launch_index
|
|
- ec2_architecture
|
|
- ec2_association
|
|
- ec2_attachTime
|
|
- ec2_attachment
|
|
- ec2_attachmentId
|
|
- ec2_client_token
|
|
- ec2_deleteOnTermination
|
|
- ec2_description
|
|
- ec2_deviceIndex
|
|
- ec2_dns_name
|
|
- ec2_eventsSet
|
|
- ec2_group_name
|
|
- ec2_hypervisor
|
|
- ec2_id
|
|
- ec2_image_id
|
|
- ec2_instanceState
|
|
- ec2_instance_type
|
|
- ec2_ipOwnerId
|
|
- ec2_ip_address
|
|
- ec2_item
|
|
- ec2_kernel
|
|
- ec2_key_name
|
|
- ec2_launch_time
|
|
- ec2_monitored
|
|
- ec2_monitoring
|
|
- ec2_networkInterfaceId
|
|
- ec2_ownerId
|
|
- ec2_persistent
|
|
- ec2_placement
|
|
- ec2_platform
|
|
- ec2_previous_state
|
|
- ec2_private_dns_name
|
|
- ec2_private_ip_address
|
|
- ec2_publicIp
|
|
- ec2_public_dns_name
|
|
- ec2_ramdisk
|
|
- ec2_reason
|
|
- ec2_region
|
|
- ec2_requester_id
|
|
- ec2_root_device_name
|
|
- ec2_root_device_type
|
|
- ec2_security_group_ids
|
|
- ec2_security_group_names
|
|
- ec2_shutdown_state
|
|
- ec2_sourceDestCheck
|
|
- ec2_spot_instance_request_id
|
|
- ec2_state
|
|
- ec2_state_code
|
|
- ec2_state_reason
|
|
- ec2_status
|
|
- ec2_subnet_id
|
|
- ec2_tenancy
|
|
- ec2_virtualization_type
|
|
- ec2_vpc_id
|
|
|
|
These variables are pulled out of a boto.ec2.instance object. There is a lack of
|
|
consistency with variable spellings (camelCase and underscores) since this
|
|
just loops through all variables the object exposes. It is preferred to use the
|
|
ones with underscores when multiple exist.
|
|
|
|
In addition, if an instance has AWS Tags associated with it, each tag is a new
|
|
variable named:
|
|
- ec2_tag_[Key] = [Value]
|
|
|
|
Security groups are comma-separated in 'ec2_security_group_ids' and
|
|
'ec2_security_group_names'.
|
|
'''
|
|
|
|
# (c) 2012, Peter Sankauskas
|
|
#
|
|
# 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/>.
|
|
|
|
######################################################################
|
|
|
|
import os
|
|
import argparse
|
|
import re
|
|
from time import time
|
|
from boto import ec2
|
|
import ConfigParser
|
|
|
|
try:
|
|
import json
|
|
except ImportError:
|
|
import simplejson as json
|
|
|
|
|
|
class Ec2Inventory(object):
|
|
def __init__(self):
|
|
''' Main execution path '''
|
|
|
|
# Inventory grouped by instance IDs, tags, security groups, regions,
|
|
# and availability zones
|
|
self.inventory = {}
|
|
|
|
# Index of hostname (address) to instance ID
|
|
self.index = {}
|
|
|
|
# Read settings and parse CLI arguments
|
|
self.read_settings()
|
|
self.parse_cli_args()
|
|
|
|
# Cache
|
|
if self.args.refresh_cache:
|
|
self.do_api_calls_update_cache()
|
|
elif not self.is_cache_valid():
|
|
self.do_api_calls_update_cache()
|
|
|
|
# Data to print
|
|
if self.args.host:
|
|
data_to_print = self.get_host_info()
|
|
|
|
elif self.args.list:
|
|
# Display list of instances for inventory
|
|
if len(self.inventory) == 0:
|
|
data_to_print = self.get_inventory_from_cache()
|
|
else:
|
|
data_to_print = self.json_format_dict(self.inventory, True)
|
|
|
|
print data_to_print
|
|
|
|
|
|
def is_cache_valid(self):
|
|
''' Determines if the cache files have expired, or if it is still valid '''
|
|
|
|
if os.path.isfile(self.cache_path_cache):
|
|
mod_time = os.path.getmtime(self.cache_path_cache)
|
|
current_time = time()
|
|
if (mod_time + self.cache_max_age) > current_time:
|
|
if os.path.isfile(self.cache_path_index):
|
|
return True
|
|
|
|
return False
|
|
|
|
|
|
def read_settings(self):
|
|
''' Reads the settings from the ec2.ini file '''
|
|
|
|
config = ConfigParser.SafeConfigParser()
|
|
config.read(os.path.dirname(os.path.realpath(__file__)) + '/ec2.ini')
|
|
|
|
# Regions
|
|
self.regions = []
|
|
configRegions = config.get('ec2', 'regions')
|
|
if (configRegions == 'all'):
|
|
for regionInfo in ec2.regions():
|
|
self.regions.append(regionInfo.name)
|
|
else:
|
|
self.regions = configRegions.split(",")
|
|
|
|
# Destination addresses
|
|
self.destination_variable = config.get('ec2', 'destination_variable')
|
|
self.vpc_destination_variable = config.get('ec2', 'vpc_destination_variable')
|
|
|
|
# Cache related
|
|
cache_path = config.get('ec2', 'cache_path')
|
|
self.cache_path_cache = cache_path + "/ansible-ec2.cache"
|
|
self.cache_path_index = cache_path + "/ansible-ec2.index"
|
|
self.cache_max_age = config.getint('ec2', 'cache_max_age')
|
|
|
|
|
|
def parse_cli_args(self):
|
|
''' Command line argument processing '''
|
|
|
|
parser = argparse.ArgumentParser(description='Produce an Ansible Inventory file based on EC2')
|
|
parser.add_argument('--list', action='store_true', default=True,
|
|
help='List instances (default: True)')
|
|
parser.add_argument('--host', action='store',
|
|
help='Get all the variables about a specific instance')
|
|
parser.add_argument('--refresh-cache', action='store_true', default=False,
|
|
help='Force refresh of cache by making API requests to EC2 (default: False - use cache files)')
|
|
self.args = parser.parse_args()
|
|
|
|
|
|
def do_api_calls_update_cache(self):
|
|
''' Do API calls to each region, and save data in cache files '''
|
|
|
|
for region in self.regions:
|
|
self.get_instances_by_region(region)
|
|
|
|
self.write_to_cache(self.inventory, self.cache_path_cache)
|
|
self.write_to_cache(self.index, self.cache_path_index)
|
|
|
|
|
|
def get_instances_by_region(self, region):
|
|
''' Makes an AWS EC2 API call to the list of instances in a particular
|
|
region '''
|
|
|
|
conn = ec2.connect_to_region(region)
|
|
reservations = conn.get_all_instances()
|
|
for reservation in reservations:
|
|
for instance in reservation.instances:
|
|
self.add_instance(instance, region)
|
|
|
|
|
|
def get_instance(self, region, instance_id):
|
|
''' Gets details about a specific instance '''
|
|
conn = ec2.connect_to_region(region)
|
|
reservations = conn.get_all_instances([instance_id])
|
|
for reservation in reservations:
|
|
for instance in reservation.instances:
|
|
return instance
|
|
|
|
|
|
def add_instance(self, instance, region):
|
|
''' Adds an instance to the inventory and index, as long as it is
|
|
addressable '''
|
|
|
|
# Only want running instances
|
|
if instance.state == 'terminated':
|
|
return
|
|
|
|
# Select the best destination address
|
|
if instance.subnet_id:
|
|
dest = getattr(instance, self.vpc_destination_variable)
|
|
else:
|
|
dest = getattr(instance, self.destination_variable)
|
|
|
|
if dest == None:
|
|
# Skip instances we cannot address (e.g. private VPC subnet)
|
|
return
|
|
|
|
# Add to index
|
|
self.index[dest] = [region, instance.id]
|
|
|
|
# Inventory: Group by instance ID (always a group of 1)
|
|
self.inventory[instance.id] = [dest]
|
|
|
|
# Inventory: Group by region
|
|
self.push(self.inventory, region, dest)
|
|
|
|
# Inventory: Group by availability zone
|
|
self.push(self.inventory, instance.placement, dest)
|
|
|
|
# Inventory: Group by security group
|
|
for group in instance.groups:
|
|
key = self.to_safe("security_group_" + group.name)
|
|
self.push(self.inventory, key, dest)
|
|
|
|
# Inventory: Group by tag keys
|
|
for k, v in instance.tags.iteritems():
|
|
key = self.to_safe("tag_" + k + "=" + v)
|
|
self.push(self.inventory, key, dest)
|
|
|
|
|
|
def get_host_info(self):
|
|
''' Get variables about a specific host '''
|
|
|
|
if len(self.index) == 0:
|
|
# Need to load index from cache
|
|
self.load_index_from_cache()
|
|
|
|
(region, instance_id) = self.index[self.args.host]
|
|
instance = self.get_instance(region, instance_id)
|
|
instance_vars = {}
|
|
for key in vars(instance):
|
|
value = getattr(instance, key)
|
|
key = self.to_safe('ec2_' + key)
|
|
|
|
# Handle complex types
|
|
if type(value) in [int, bool]:
|
|
instance_vars[key] = value
|
|
elif type(value) in [str, unicode]:
|
|
instance_vars[key] = value.strip()
|
|
elif type(value) == type(None):
|
|
instance_vars[key] = ''
|
|
elif key == 'ec2_region':
|
|
instance_vars[key] = value.name
|
|
elif key == 'ec2_tags':
|
|
for k, v in value.iteritems():
|
|
key = self.to_safe('ec2_tag_' + k)
|
|
instance_vars[key] = v
|
|
elif key == 'ec2_groups':
|
|
group_ids = []
|
|
group_names = []
|
|
for group in value:
|
|
group_ids.append(group.id)
|
|
group_names.append(group.name)
|
|
instance_vars["ec2_security_group_ids"] = ','.join(group_ids)
|
|
instance_vars["ec2_security_group_names"] = ','.join(group_names)
|
|
else:
|
|
pass
|
|
# TODO Product codes if someone finds them useful
|
|
#print key
|
|
#print type(value)
|
|
#print value
|
|
|
|
return self.json_format_dict(instance_vars, True)
|
|
|
|
|
|
def push(self, my_dict, key, element):
|
|
''' Pushed an element onto an array that may not have been defined in
|
|
the dict '''
|
|
|
|
if key in my_dict:
|
|
my_dict[key].append(element);
|
|
else:
|
|
my_dict[key] = [element]
|
|
|
|
|
|
def get_inventory_from_cache(self):
|
|
''' Reads the inventory from the cache file and returns it as a JSON
|
|
object '''
|
|
|
|
cache = open(self.cache_path_cache, 'r')
|
|
json_inventory = cache.read()
|
|
return json_inventory
|
|
|
|
|
|
def load_index_from_cache(self):
|
|
''' Reads the index from the cache file sets self.index '''
|
|
|
|
cache = open(self.cache_path_index, 'r')
|
|
json_index = cache.read()
|
|
self.index = json.loads(json_index)
|
|
|
|
|
|
def write_to_cache(self, data, filename):
|
|
''' Writes data in JSON format to a file '''
|
|
|
|
json_data = self.json_format_dict(data, True)
|
|
cache = open(filename, 'w')
|
|
cache.write(json_data)
|
|
cache.close()
|
|
|
|
|
|
def to_safe(self, word):
|
|
''' Converts 'bad' characters in a string to underscores so they can be
|
|
used as Ansible groups '''
|
|
|
|
return re.sub("[^A-Za-z0-9\-]", "_", word)
|
|
|
|
|
|
def json_format_dict(self, data, pretty=False):
|
|
''' Converts a dict to a JSON object and dumps it as a formatted
|
|
string '''
|
|
|
|
if pretty:
|
|
return json.dumps(data, sort_keys=True, indent=2)
|
|
else:
|
|
return json.dumps(data)
|
|
|
|
|
|
# Run the script
|
|
Ec2Inventory()
|
|
|