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#!/usr/bin/env python3
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'
Optional region environment variable if region is 'auto'
This script also assumes that there is an ec2.ini file alongside it. To specify a
different path to ec2.ini, define the EC2_INI_PATH environment variable:
export EC2_INI_PATH=/path/to/my_ec2.ini
If you're using eucalyptus you need to set the above variables and
you need to define:
export EC2_URL=http://hostname_of_your_cc:port/services/Eucalyptus
If you're using boto profiles (requires boto>=2.24.0) you can choose a profile
using the --boto-profile command line argument (e.g. --boto-profile prod) or using
the AWS_PROFILE variable:
AWS_PROFILE=prod ansible-playbook -i myplaybook.yml
For more details, see:
You can filter for specific EC2 instances by creating an environment variable
named EC2_INSTANCE_FILTERS, which has the same format as the instance_filters
entry documented in ec2.ini. For example, to find all hosts whose name begins
with 'webserver', one might use:
export EC2_INSTANCE_FILTERS='tag:Name=webserver*'
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_block_devices
- 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
When destination_format and destination_format_tags are specified
the destination_format can be built from the instance tags and attributes.
The behavior will first check the user defined tags, then proceed to
check instance attributes, and finally if neither are found 'nil' will
be used instead.
'my_instance': {
'region': 'us-east-1', # attribute
'availability_zone': 'us-east-1a', # attribute
'private_dns_name': '', # attribute
'ec2_tag_deployment': 'blue', # tag
'ec2_tag_clusterid': 'ansible', # tag
'ec2_tag_Name': 'webserver', # tag
Inside of the ec2.ini file the following settings are specified:
destination_format: {0}-{1}-{2}-{3}
destination_format_tags: Name,clusterid,deployment,private_dns_name
These settings would produce a destination_format as the following:
# (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
# 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 <>.
import sys
import os
import argparse
import re
from time import time
from copy import deepcopy
import boto
from boto import ec2
from boto import rds
from boto import elasticache
from boto import route53
from boto import sts
from ansible.module_utils import six
from ansible.module_utils import ec2 as ec2_utils
from ansible.module_utils.six.moves import configparser
HAS_BOTO3 = False
import boto3 # noqa
HAS_BOTO3 = True
except ImportError:
from collections import defaultdict
import json
'all_elasticache_clusters': 'False',
'all_elasticache_nodes': 'False',
'all_elasticache_replication_groups': 'False',
'all_instances': 'False',
'all_rds_instances': 'False',
'aws_access_key_id': '',
'aws_secret_access_key': '',
'aws_security_token': '',
'boto_profile': '',
'cache_max_age': '300',
'cache_path': '~/.ansible/tmp',
'destination_variable': 'public_dns_name',
'elasticache': 'True',
'eucalyptus': 'False',
'eucalyptus_host': '',
'expand_csv_tags': 'False',
'group_by_ami_id': 'True',
'group_by_availability_zone': 'True',
'group_by_aws_account': 'False',
'group_by_elasticache_cluster': 'True',
'group_by_elasticache_engine': 'True',
'group_by_elasticache_parameter_group': 'True',
'group_by_elasticache_replication_group': 'True',
'group_by_instance_id': 'True',
'group_by_instance_state': 'False',
'group_by_instance_type': 'True',
'group_by_key_pair': 'True',
'group_by_platform': 'True',
'group_by_rds_engine': 'True',
'group_by_rds_parameter_group': 'True',
'group_by_region': 'True',
'group_by_route53_names': 'True',
'group_by_security_group': 'True',
'group_by_tag_keys': 'True',
'group_by_tag_none': 'True',
'group_by_vpc_id': 'True',
'hostname_variable': '',
'iam_role': '',
'include_rds_clusters': 'False',
'nested_groups': 'False',
'pattern_exclude': '',
'pattern_include': '',
'rds': 'False',
'regions': 'all',
'regions_exclude': 'us-gov-west-1, cn-north-1',
'replace_dash_in_groups': 'True',
'route53': 'False',
'route53_excluded_zones': '',
'route53_hostnames': '',
'stack_filters': 'False',
'vpc_destination_variable': 'ip_address'
class Ec2Inventory(object):
def _empty_inventory(self):
return {"_meta": {"hostvars": {}}}
def __init__(self):
''' Main execution path '''
# Inventory grouped by instance IDs, tags, security groups, regions,
# and availability zones
self.inventory = self._empty_inventory()
self.aws_account_id = None
# Index of hostname (address) to instance ID
self.index = {}
# Boto profile to use (if any)
self.boto_profile = None
# AWS credentials.
self.credentials = {}
# Read settings and parse CLI arguments
# Make sure that profile_name is not passed at all if not set
# as pre 2.24 boto will fall over otherwise
if self.boto_profile:
if not hasattr(boto.ec2.EC2Connection, 'profile_name'):
self.fail_with_error("boto version must be >= 2.24 to use profile")
# Cache
if self.args.refresh_cache:
elif not self.is_cache_valid():
# Data to print
data_to_print = self.get_host_info()
elif self.args.list:
# Display list of instances for inventory
if self.inventory == self._empty_inventory():
data_to_print = self.get_inventory_from_cache()
data_to_print = self.json_format_dict(self.inventory, True)
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 '''
scriptbasename = __file__
scriptbasename = os.path.basename(scriptbasename)
scriptbasename = scriptbasename.replace('.py', '')
defaults = {
'ec2': {
'ini_fallback': os.path.join(os.path.dirname(__file__), 'ec2.ini'),
'ini_path': os.path.join(os.path.dirname(__file__), '%s.ini' % scriptbasename)
if six.PY3:
config = configparser.ConfigParser(DEFAULTS)
config = configparser.SafeConfigParser(DEFAULTS)
ec2_ini_path = os.environ.get('EC2_INI_PATH', defaults['ec2']['ini_path'])
ec2_ini_path = os.path.expanduser(os.path.expandvars(ec2_ini_path))
if not os.path.isfile(ec2_ini_path):
ec2_ini_path = os.path.expanduser(defaults['ec2']['ini_fallback'])
if os.path.isfile(ec2_ini_path):
# Add empty sections if they don't exist
except configparser.DuplicateSectionError:
except configparser.DuplicateSectionError:
# is eucalyptus?
self.eucalyptus = config.getboolean('ec2', 'eucalyptus')
self.eucalyptus_host = config.get('ec2', 'eucalyptus_host')
# Regions
self.regions = []
config_regions = config.get('ec2', 'regions')
if (config_regions == 'all'):
if self.eucalyptus_host:
self.regions.append(boto.connect_euca(host=self.eucalyptus_host), **self.credentials)
config_regions_exclude = config.get('ec2', 'regions_exclude')
for region_info in ec2.regions():
if not in config_regions_exclude:
self.regions = config_regions.split(",")
if 'auto' in self.regions:
env_region = os.environ.get('AWS_REGION')
if env_region is None:
env_region = os.environ.get('AWS_DEFAULT_REGION')
self.regions = [env_region]
# Destination addresses
self.destination_variable = config.get('ec2', 'destination_variable')
self.vpc_destination_variable = config.get('ec2', 'vpc_destination_variable')
self.hostname_variable = config.get('ec2', 'hostname_variable')
if config.has_option('ec2', 'destination_format') and \
config.has_option('ec2', 'destination_format_tags'):
self.destination_format = config.get('ec2', 'destination_format')
self.destination_format_tags = config.get('ec2', 'destination_format_tags').split(',')
self.destination_format = None
self.destination_format_tags = None
# Route53
self.route53_enabled = config.getboolean('ec2', 'route53')
self.route53_hostnames = config.get('ec2', 'route53_hostnames')
self.route53_excluded_zones = []
self.route53_excluded_zones = [a for a in config.get('ec2', 'route53_excluded_zones').split(',') if a]
# Include RDS instances?
self.rds_enabled = config.getboolean('ec2', 'rds')
# Include RDS cluster instances?
self.include_rds_clusters = config.getboolean('ec2', 'include_rds_clusters')
# Include ElastiCache instances?
self.elasticache_enabled = config.getboolean('ec2', 'elasticache')
# Return all EC2 instances?
self.all_instances = config.getboolean('ec2', 'all_instances')
# Instance states to be gathered in inventory. Default is 'running'.
# Setting 'all_instances' to 'yes' overrides this option.
ec2_valid_instance_states = [
self.ec2_instance_states = []
if self.all_instances:
self.ec2_instance_states = ec2_valid_instance_states
elif config.has_option('ec2', 'instance_states'):
for instance_state in config.get('ec2', 'instance_states').split(','):
instance_state = instance_state.strip()
if instance_state not in ec2_valid_instance_states:
self.ec2_instance_states = ['running']
# Return all RDS instances? (if RDS is enabled)
self.all_rds_instances = config.getboolean('ec2', 'all_rds_instances')
# Return all ElastiCache replication groups? (if ElastiCache is enabled)
self.all_elasticache_replication_groups = config.getboolean('ec2', 'all_elasticache_replication_groups')
# Return all ElastiCache clusters? (if ElastiCache is enabled)
self.all_elasticache_clusters = config.getboolean('ec2', 'all_elasticache_clusters')
# Return all ElastiCache nodes? (if ElastiCache is enabled)
self.all_elasticache_nodes = config.getboolean('ec2', 'all_elasticache_nodes')
# boto configuration profile (prefer CLI argument then environment variables then config file)
self.boto_profile = self.args.boto_profile or \
os.environ.get('AWS_PROFILE') or \
config.get('ec2', 'boto_profile')
# AWS credentials (prefer environment variables)
if not (self.boto_profile or os.environ.get('AWS_ACCESS_KEY_ID') or
aws_access_key_id = config.get('credentials', 'aws_access_key_id')
aws_secret_access_key = config.get('credentials', 'aws_secret_access_key')
aws_security_token = config.get('credentials', 'aws_security_token')
if aws_access_key_id:
self.credentials = {
'aws_access_key_id': aws_access_key_id,
'aws_secret_access_key': aws_secret_access_key
if aws_security_token:
self.credentials['security_token'] = aws_security_token
# Cache related
cache_dir = os.path.expanduser(config.get('ec2', 'cache_path'))
if self.boto_profile:
cache_dir = os.path.join(cache_dir, 'profile_' + self.boto_profile)
if not os.path.exists(cache_dir):
cache_name = 'ansible-ec2'
cache_id = self.boto_profile or os.environ.get('AWS_ACCESS_KEY_ID', self.credentials.get('aws_access_key_id'))
if cache_id:
cache_name = '%s-%s' % (cache_name, cache_id)
cache_name += '-' + str(abs(hash(__file__)))[1:7]
self.cache_path_cache = os.path.join(cache_dir, "%s.cache" % cache_name)
self.cache_path_index = os.path.join(cache_dir, "%s.index" % cache_name)
self.cache_max_age = config.getint('ec2', 'cache_max_age')
self.expand_csv_tags = config.getboolean('ec2', 'expand_csv_tags')
# Configure nested groups instead of flat namespace.
self.nested_groups = config.getboolean('ec2', 'nested_groups')
# Replace dash or not in group names
self.replace_dash_in_groups = config.getboolean('ec2', 'replace_dash_in_groups')
# IAM role to assume for connection
self.iam_role = config.get('ec2', 'iam_role')
# Configure which groups should be created.
group_by_options = [a for a in DEFAULTS if a.startswith('group_by')]
for option in group_by_options:
setattr(self, option, config.getboolean('ec2', option))
# Do we need to just include hosts that match a pattern?
self.pattern_include = config.get('ec2', 'pattern_include')
if self.pattern_include:
self.pattern_include = re.compile(self.pattern_include)
# Do we need to exclude hosts that match a pattern?
self.pattern_exclude = config.get('ec2', 'pattern_exclude')
if self.pattern_exclude:
self.pattern_exclude = re.compile(self.pattern_exclude)
# Do we want to stack multiple filters?
self.stack_filters = config.getboolean('ec2', 'stack_filters')
# Instance filters (see boto and EC2 API docs). Ignore invalid filters.
self.ec2_instance_filters = []
if config.has_option('ec2', 'instance_filters') or 'EC2_INSTANCE_FILTERS' in os.environ:
filters = os.getenv('EC2_INSTANCE_FILTERS', config.get('ec2', 'instance_filters') if config.has_option('ec2', 'instance_filters') else '')
if self.stack_filters and '&' in filters:
self.fail_with_error("AND filters along with stack_filter enabled is not supported.\n")
filter_sets = [f for f in filters.split(',') if f]
for filter_set in filter_sets:
filters = {}
filter_set = filter_set.strip()
for instance_filter in filter_set.split("&"):
instance_filter = instance_filter.strip()
if not instance_filter or '=' not in instance_filter:
filter_key, filter_value = [x.strip() for x in instance_filter.split('=', 1)]
if not filter_key:
filters[filter_key] = filter_value
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)')
parser.add_argument('--profile', '--boto-profile', action='store', dest='boto_profile',
help='Use boto profile for connections to EC2')
self.args = parser.parse_args()
def do_api_calls_update_cache(self):
''' Do API calls to each region, and save data in cache files '''
if self.route53_enabled:
for region in self.regions:
if self.rds_enabled:
if self.elasticache_enabled:
if self.include_rds_clusters:
self.write_to_cache(self.inventory, self.cache_path_cache)
self.write_to_cache(self.index, self.cache_path_index)
def connect(self, region):
''' create connection to api server'''
if self.eucalyptus:
conn = boto.connect_euca(host=self.eucalyptus_host, **self.credentials)
conn.APIVersion = '2010-08-31'
conn = self.connect_to_aws(ec2, region)
return conn
def boto_fix_security_token_in_profile(self, connect_args):
''' monkey patch for boto issue boto/boto#2100 '''
profile = 'profile ' + self.boto_profile
if boto.config.has_option(profile, 'aws_security_token'):
connect_args['security_token'] = boto.config.get(profile, 'aws_security_token')
return connect_args
def connect_to_aws(self, module, region):
connect_args = deepcopy(self.credentials)
# only pass the profile name if it's set (as it is not supported by older boto versions)
if self.boto_profile:
connect_args['profile_name'] = self.boto_profile
elif os.environ.get('AWS_SESSION_TOKEN'):
connect_args['security_token'] = os.environ.get('AWS_SESSION_TOKEN')
if self.iam_role:
sts_conn = sts.connect_to_region(region, **connect_args)
role = sts_conn.assume_role(self.iam_role, 'ansible_dynamic_inventory')
connect_args['aws_access_key_id'] = role.credentials.access_key
connect_args['aws_secret_access_key'] = role.credentials.secret_key
connect_args['security_token'] = role.credentials.session_token
conn = module.connect_to_region(region, **connect_args)
# connect_to_region will fail "silently" by returning None if the region name is wrong or not supported
if conn is None:
self.fail_with_error("region name: %s likely not supported, or AWS is down. connection to region failed." % region)
return conn
def get_instances_by_region(self, region):
''' Makes an AWS EC2 API call to the list of instances in a particular
region '''
conn = self.connect(region)
reservations = []
if self.ec2_instance_filters:
if self.stack_filters:
filters_dict = {}
for filters in self.ec2_instance_filters:
for filters in self.ec2_instance_filters:
reservations = conn.get_all_instances()
# Pull the tags back in a second step
# AWS are on record as saying that the tags fetched in the first `get_all_instances` request are not
# reliable and may be missing, and the only way to guarantee they are there is by calling `get_all_tags`
instance_ids = []
for reservation in reservations:
instance_ids.extend([ for instance in reservation.instances])
max_filter_value = 199
tags = []
for i in range(0, len(instance_ids), max_filter_value):
tags.extend(conn.get_all_tags(filters={'resource-type': 'instance', 'resource-id': instance_ids[i:i + max_filter_value]}))
tags_by_instance_id = defaultdict(dict)
for tag in tags:
tags_by_instance_id[tag.res_id][] = tag.value
if (not self.aws_account_id) and reservations:
self.aws_account_id = reservations[0].owner_id
for reservation in reservations:
for instance in reservation.instances:
instance.tags = tags_by_instance_id[]
self.add_instance(instance, region)
except boto.exception.BotoServerError as e:
if e.error_code == 'AuthFailure':
error = self.get_auth_error_message()
backend = 'Eucalyptus' if self.eucalyptus else 'AWS'
error = "Error connecting to %s backend.\n%s" % (backend, e.message)
self.fail_with_error(error, 'getting EC2 instances')
def tags_match_filters(self, tags):
''' return True if given tags match configured filters '''
if not self.ec2_instance_filters:
return True
for filters in self.ec2_instance_filters:
for filter_name, filter_value in filters.items():
if filter_name[:4] != 'tag:':
filter_name = filter_name[4:]
if filter_name not in tags:
if self.stack_filters:
return False
if isinstance(filter_value, list):
if self.stack_filters and tags[filter_name] not in filter_value:
return False
if not self.stack_filters and tags[filter_name] in filter_value:
return True
if isinstance(filter_value, six.string_types):
if self.stack_filters and tags[filter_name] != filter_value:
return False
if not self.stack_filters and tags[filter_name] == filter_value:
return True
return self.stack_filters
def get_rds_instances_by_region(self, region):
''' Makes an AWS API call to the list of RDS instances in a particular
region '''
if not HAS_BOTO3:
self.fail_with_error("Working with RDS instances requires boto3 - please install boto3 and try again",
"getting RDS instances")
client = ec2_utils.boto3_inventory_conn('client', 'rds', region, **self.credentials)
db_instances = client.describe_db_instances()
conn = self.connect_to_aws(rds, region)
if conn:
marker = None
while True:
instances = conn.get_all_dbinstances(marker=marker)
marker = instances.marker
for index, instance in enumerate(instances):
# Add tags to instances.
instance.arn = db_instances['DBInstances'][index]['DBInstanceArn']
tags = client.list_tags_for_resource(ResourceName=instance.arn)['TagList']
instance.tags = {}
for tag in tags:
instance.tags[tag['Key']] = tag['Value']
if self.tags_match_filters(instance.tags):
self.add_rds_instance(instance, region)
if not marker:
except boto.exception.BotoServerError as e:
error = e.reason
if e.error_code == 'AuthFailure':
error = self.get_auth_error_message()
elif e.error_code == "OptInRequired":
error = "RDS hasn't been enabled for this account yet. " \
"You must either log in to the RDS service through the AWS console to enable it, " \
"or set 'rds = False' in ec2.ini"
elif not e.reason == "Forbidden":
error = "Looks like AWS RDS is down:\n%s" % e.message
self.fail_with_error(error, 'getting RDS instances')
def include_rds_clusters_by_region(self, region):
if not HAS_BOTO3:
self.fail_with_error("Working with RDS clusters requires boto3 - please install boto3 and try again",
"getting RDS clusters")
client = ec2_utils.boto3_inventory_conn('client', 'rds', region, **self.credentials)
marker, clusters = '', []
while marker is not None:
resp = client.describe_db_clusters(Marker=marker)
marker = resp.get('Marker', None)
account_id = boto.connect_iam().get_user().arn.split(':')[4]
c_dict = {}
for c in clusters:
# remove these datetime objects as there is no serialisation to json
# currently in place and we don't need the data yet
if 'EarliestRestorableTime' in c:
del c['EarliestRestorableTime']
if 'LatestRestorableTime' in c:
del c['LatestRestorableTime']
if not self.ec2_instance_filters:
matches_filter = True
matches_filter = False
# arn:aws:rds:<region>:<account number>:<resourcetype>:<name>
tags = client.list_tags_for_resource(
ResourceName='arn:aws:rds:' + region + ':' + account_id + ':cluster:' + c['DBClusterIdentifier'])
c['Tags'] = tags['TagList']
if self.ec2_instance_filters:
for filters in self.ec2_instance_filters:
for filter_key, filter_values in filters.items():
# get AWS tag key e.g. tag:env will be 'env'
tag_name = filter_key.split(":", 1)[1]
# Filter values is a list (if you put multiple values for the same tag name)
matches_filter = any(d['Key'] == tag_name and d['Value'] in filter_values for d in c['Tags'])
if matches_filter:
# it matches a filter, so stop looking for further matches
if matches_filter:
except Exception as e:
if e.message.find('DBInstanceNotFound') >= 0:
# AWS RDS bug (2016-01-06) means deletion does not fully complete and leave an 'empty' cluster.
# Ignore errors when trying to find tags for these
# ignore empty clusters caused by AWS bug
if len(c['DBClusterMembers']) == 0:
elif matches_filter:
c_dict[c['DBClusterIdentifier']] = c
self.inventory['db_clusters'] = c_dict
def get_elasticache_clusters_by_region(self, region):
''' Makes an AWS API call to the list of ElastiCache clusters (with
nodes' info) in a particular region.'''
# ElastiCache boto module doesn't provide a get_all_instances method,
# that's why we need to call describe directly (it would be called by
# the shorthand method anyway...)
clusters = []
conn = self.connect_to_aws(elasticache, region)
if conn:
# show_cache_node_info = True
# because we also want nodes' information
_marker = 1
while _marker:
if _marker == 1:
_marker = None
response = conn.describe_cache_clusters(None, None, _marker, True)
_marker = response['DescribeCacheClustersResponse']['DescribeCacheClustersResult']['Marker']
# Boto also doesn't provide wrapper classes to CacheClusters or
# CacheNodes. Because of that we can't make use of the get_list
# method in the AWSQueryConnection. Let's do the work manually
clusters = clusters + response['DescribeCacheClustersResponse']['DescribeCacheClustersResult']['CacheClusters']
except KeyError as e:
error = "ElastiCache query to AWS failed (unexpected format)."
self.fail_with_error(error, 'getting ElastiCache clusters')
except boto.exception.BotoServerError as e:
error = e.reason
if e.error_code == 'AuthFailure':
error = self.get_auth_error_message()
elif e.error_code == "OptInRequired":
error = "ElastiCache hasn't been enabled for this account yet. " \
"You must either log in to the ElastiCache service through the AWS console to enable it, " \
"or set 'elasticache = False' in ec2.ini"
elif not e.reason == "Forbidden":
error = "Looks like AWS ElastiCache is down:\n%s" % e.message
self.fail_with_error(error, 'getting ElastiCache clusters')
for cluster in clusters:
self.add_elasticache_cluster(cluster, region)
def get_elasticache_replication_groups_by_region(self, region):
''' Makes an AWS API call to the list of ElastiCache replication groups
in a particular region.'''
# ElastiCache boto module doesn't provide a get_all_instances method,
# that's why we need to call describe directly (it would be called by
# the shorthand method anyway...)
conn = self.connect_to_aws(elasticache, region)
if conn:
response = conn.describe_replication_groups()
except boto.exception.BotoServerError as e:
error = e.reason
if e.error_code == 'AuthFailure':
error = self.get_auth_error_message()
if not e.reason == "Forbidden":
error = "Looks like AWS ElastiCache [Replication Groups] is down:\n%s" % e.message
self.fail_with_error(error, 'getting ElastiCache clusters')
# Boto also doesn't provide wrapper classes to ReplicationGroups
# Because of that we can't make use of the get_list method in the
# AWSQueryConnection. Let's do the work manually
replication_groups = response['DescribeReplicationGroupsResponse']['DescribeReplicationGroupsResult']['ReplicationGroups']
except KeyError as e:
error = "ElastiCache [Replication Groups] query to AWS failed (unexpected format)."
self.fail_with_error(error, 'getting ElastiCache clusters')
for replication_group in replication_groups:
self.add_elasticache_replication_group(replication_group, region)
def get_auth_error_message(self):
''' create an informative error message if there is an issue authenticating'''
errors = ["Authentication error retrieving ec2 inventory."]
if None in [os.environ.get('AWS_ACCESS_KEY_ID'), os.environ.get('AWS_SECRET_ACCESS_KEY')]:
errors.append(' - No AWS_ACCESS_KEY_ID or AWS_SECRET_ACCESS_KEY environment vars found')
errors.append(' - AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY environment vars found but may not be correct')
boto_paths = ['/etc/boto.cfg', '~/.boto', '~/.aws/credentials']
boto_config_found = [p for p in boto_paths if os.path.isfile(os.path.expanduser(p))]
if len(boto_config_found) > 0:
errors.append(" - Boto configs found at '%s', but the credentials contained may not be correct" % ', '.join(boto_config_found))
errors.append(" - No Boto config found at any expected location '%s'" % ', '.join(boto_paths))
return '\n'.join(errors)
def fail_with_error(self, err_msg, err_operation=None):
'''log an error to std err for ansible-playbook to consume and exit'''
if err_operation:
err_msg = 'ERROR: "{err_msg}", while: {err_operation}'.format(
err_msg=err_msg, err_operation=err_operation)
def get_instance(self, region, instance_id):
conn = self.connect(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 return instances with desired instance states
if instance.state not in self.ec2_instance_states:
# Select the best destination address
# When destination_format and destination_format_tags are specified
# the following code will attempt to find the instance tags first,
# then the instance attributes next, and finally if neither are found
# assign nil for the desired destination format attribute.
if self.destination_format and self.destination_format_tags:
dest_vars = []
inst_tags = getattr(instance, 'tags')
for tag in self.destination_format_tags:
if tag in inst_tags:
elif hasattr(instance, tag):
dest_vars.append(getattr(instance, tag))
dest = self.destination_format.format(*dest_vars)
elif instance.subnet_id:
dest = getattr(instance, self.vpc_destination_variable, None)
if dest is None:
dest = getattr(instance, 'tags').get(self.vpc_destination_variable, None)
dest = getattr(instance, self.destination_variable, None)
if dest is None:
dest = getattr(instance, 'tags').get(self.destination_variable, None)
if not dest:
# Skip instances we cannot address (e.g. private VPC subnet)
# Set the inventory name
hostname = None
if self.hostname_variable:
if self.hostname_variable.startswith('tag_'):
hostname = instance.tags.get(self.hostname_variable[4:], None)
hostname = getattr(instance, self.hostname_variable)
# set the hostname from route53
if self.route53_enabled and self.route53_hostnames:
route53_names = self.get_instance_route53_names(instance)
for name in route53_names:
if name.endswith(self.route53_hostnames):
hostname = name
# If we can't get a nice hostname, use the destination address
if not hostname:
hostname = dest
# to_safe strips hostname characters like dots, so don't strip route53 hostnames
elif self.route53_enabled and self.route53_hostnames and hostname.endswith(self.route53_hostnames):
hostname = hostname.lower()
hostname = self.to_safe(hostname).lower()
# if we only want to include hosts that match a pattern, skip those that don't
if self.pattern_include and not self.pattern_include.match(hostname):
# if we need to exclude hosts that match a pattern, skip those
if self.pattern_exclude and self.pattern_exclude.match(hostname):
# Add to index
self.index[hostname] = [region,]
# Inventory: Group by instance ID (always a group of 1)
if self.group_by_instance_id:
self.inventory[] = [hostname]
if self.nested_groups:
self.push_group(self.inventory, 'instances',
# Inventory: Group by region
if self.group_by_region:
self.push(self.inventory, region, hostname)
if self.nested_groups:
self.push_group(self.inventory, 'regions', region)
# Inventory: Group by availability zone
if self.group_by_availability_zone:
self.push(self.inventory, instance.placement, hostname)
if self.nested_groups:
if self.group_by_region:
self.push_group(self.inventory, region, instance.placement)
self.push_group(self.inventory, 'zones', instance.placement)
# Inventory: Group by Amazon Machine Image (AMI) ID
if self.group_by_ami_id:
ami_id = self.to_safe(instance.image_id)
self.push(self.inventory, ami_id, hostname)
if self.nested_groups:
self.push_group(self.inventory, 'images', ami_id)
# Inventory: Group by instance type
if self.group_by_instance_type:
type_name = self.to_safe('type_' + instance.instance_type)
self.push(self.inventory, type_name, hostname)
if self.nested_groups:
self.push_group(self.inventory, 'types', type_name)
# Inventory: Group by instance state
if self.group_by_instance_state:
state_name = self.to_safe('instance_state_' + instance.state)
self.push(self.inventory, state_name, hostname)
if self.nested_groups:
self.push_group(self.inventory, 'instance_states', state_name)
# Inventory: Group by platform
if self.group_by_platform:
if instance.platform:
platform = self.to_safe('platform_' + instance.platform)
platform = self.to_safe('platform_undefined')
self.push(self.inventory, platform, hostname)
if self.nested_groups:
self.push_group(self.inventory, 'platforms', platform)
# Inventory: Group by key pair
if self.group_by_key_pair and instance.key_name:
key_name = self.to_safe('key_' + instance.key_name)
self.push(self.inventory, key_name, hostname)
if self.nested_groups:
self.push_group(self.inventory, 'keys', key_name)
# Inventory: Group by VPC
if self.group_by_vpc_id and instance.vpc_id:
vpc_id_name = self.to_safe('vpc_id_' + instance.vpc_id)
self.push(self.inventory, vpc_id_name, hostname)
if self.nested_groups:
self.push_group(self.inventory, 'vpcs', vpc_id_name)
# Inventory: Group by security group
if self.group_by_security_group:
for group in instance.groups:
key = self.to_safe("security_group_" +
self.push(self.inventory, key, hostname)
if self.nested_groups:
self.push_group(self.inventory, 'security_groups', key)
except AttributeError:
self.fail_with_error('\n'.join(['Package boto seems a bit older.',
'Please upgrade boto >= 2.3.0.']))
# Inventory: Group by AWS account ID
if self.group_by_aws_account:
self.push(self.inventory, self.aws_account_id, hostname)
if self.nested_groups:
self.push_group(self.inventory, 'accounts', self.aws_account_id)
# Inventory: Group by tag keys
if self.group_by_tag_keys:
for k, v in instance.tags.items():
if self.expand_csv_tags and v and ',' in v:
values = map(lambda x: x.strip(), v.split(','))
values = [v]
for v in values:
if v:
key = self.to_safe("tag_" + k + "=" + v)
key = self.to_safe("tag_" + k)
self.push(self.inventory, key, hostname)
if self.nested_groups:
self.push_group(self.inventory, 'tags', self.to_safe("tag_" + k))
if v:
self.push_group(self.inventory, self.to_safe("tag_" + k), key)
# Inventory: Group by Route53 domain names if enabled
if self.route53_enabled and self.group_by_route53_names:
route53_names = self.get_instance_route53_names(instance)