ansible/cloud/amazon/dynamodb_table.py
2016-03-23 00:43:37 +01:00

415 lines
14 KiB
Python

#!/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: dynamodb_table
short_description: Create, update or delete AWS Dynamo DB tables.
description:
- Create or delete AWS Dynamo DB tables.
- Can update the provisioned throughput on existing tables.
- Returns the status of the specified table.
author: Alan Loi (@loia)
requirements:
- "boto >= 2.37.0"
options:
state:
description:
- Create or delete the table
required: false
choices: ['present', 'absent']
default: 'present'
name:
description:
- Name of the table.
required: true
hash_key_name:
description:
- Name of the hash key.
- Required when C(state=present).
required: false
default: null
hash_key_type:
description:
- Type of the hash key.
required: false
choices: ['STRING', 'NUMBER', 'BINARY']
default: 'STRING'
range_key_name:
description:
- Name of the range key.
required: false
default: null
range_key_type:
description:
- Type of the range key.
required: false
choices: ['STRING', 'NUMBER', 'BINARY']
default: 'STRING'
read_capacity:
description:
- Read throughput capacity (units) to provision.
required: false
default: 1
write_capacity:
description:
- Write throughput capacity (units) to provision.
required: false
default: 1
indexes:
description:
- list of dictionaries describing indexes to add to the table. global indexes can be updated. local indexes don't support updates or have throughput.
- "required options: ['name', 'type', 'hash_key_name']"
- "valid types: ['all', 'global_all', 'global_include', 'global_keys_only', 'include', 'keys_only']"
- "other options: ['hash_key_type', 'range_key_name', 'range_key_type', 'includes', 'read_capacity', 'write_capacity']"
required: false
default: []
version_added: "2.1"
extends_documentation_fragment:
- aws
- ec2
"""
EXAMPLES = '''
# Create dynamo table with hash and range primary key
- dynamodb_table:
name: my-table
region: us-east-1
hash_key_name: id
hash_key_type: STRING
range_key_name: create_time
range_key_type: NUMBER
read_capacity: 2
write_capacity: 2
# Update capacity on existing dynamo table
- dynamodb_table:
name: my-table
region: us-east-1
read_capacity: 10
write_capacity: 10
# set index on existing dynamo table
- dynamodb_table:
name: my-table
region: us-east-1
indexes:
- name: NamedIndex
type: global_include
hash_key_name: id
range_key_name: create_time
includes:
- other_field
- other_field2
read_capacity: 10
write_capacity: 10
# Delete dynamo table
- dynamodb_table:
name: my-table
region: us-east-1
state: absent
'''
RETURN = '''
table_status:
description: The current status of the table.
returned: success
type: string
sample: ACTIVE
'''
try:
import boto
import boto.dynamodb2
from boto.dynamodb2.table import Table
from boto.dynamodb2.fields import HashKey, RangeKey, AllIndex, GlobalAllIndex, GlobalIncludeIndex, GlobalKeysOnlyIndex, IncludeIndex, KeysOnlyIndex
from boto.dynamodb2.types import STRING, NUMBER, BINARY
from boto.exception import BotoServerError, NoAuthHandlerFound, JSONResponseError
from boto.dynamodb2.exceptions import ValidationException
HAS_BOTO = True
DYNAMO_TYPE_MAP = {
'STRING': STRING,
'NUMBER': NUMBER,
'BINARY': BINARY
}
except ImportError:
HAS_BOTO = False
DYNAMO_TYPE_DEFAULT = 'STRING'
INDEX_REQUIRED_OPTIONS = ['name', 'type', 'hash_key_name']
INDEX_OPTIONS = INDEX_REQUIRED_OPTIONS + ['hash_key_type', 'range_key_name', 'range_key_type', 'includes', 'read_capacity', 'write_capacity']
INDEX_TYPE_OPTIONS = ['all', 'global_all', 'global_include', 'global_keys_only', 'include', 'keys_only']
def create_or_update_dynamo_table(connection, module):
table_name = module.params.get('name')
hash_key_name = module.params.get('hash_key_name')
hash_key_type = module.params.get('hash_key_type')
range_key_name = module.params.get('range_key_name')
range_key_type = module.params.get('range_key_type')
read_capacity = module.params.get('read_capacity')
write_capacity = module.params.get('write_capacity')
all_indexes = module.params.get('indexes')
for index in all_indexes:
validate_index(index, module)
schema = get_schema_param(hash_key_name, hash_key_type, range_key_name, range_key_type)
throughput = {
'read': read_capacity,
'write': write_capacity
}
indexes, global_indexes = get_indexes(all_indexes)
result = dict(
region=module.params.get('region'),
table_name=table_name,
hash_key_name=hash_key_name,
hash_key_type=hash_key_type,
range_key_name=range_key_name,
range_key_type=range_key_type,
read_capacity=read_capacity,
write_capacity=write_capacity,
indexes=all_indexes,
)
try:
table = Table(table_name, connection=connection)
if dynamo_table_exists(table):
result['changed'] = update_dynamo_table(table, throughput=throughput, check_mode=module.check_mode, global_indexes=global_indexes)
else:
if not module.check_mode:
Table.create(table_name, connection=connection, schema=schema, throughput=throughput, indexes=indexes, global_indexes=global_indexes)
result['changed'] = True
if not module.check_mode:
result['table_status'] = table.describe()['Table']['TableStatus']
except BotoServerError:
result['msg'] = 'Failed to create/update dynamo table due to error: ' + traceback.format_exc()
module.fail_json(**result)
else:
module.exit_json(**result)
def delete_dynamo_table(connection, module):
table_name = module.params.get('name')
result = dict(
region=module.params.get('region'),
table_name=table_name,
)
try:
table = Table(table_name, connection=connection)
if dynamo_table_exists(table):
if not module.check_mode:
table.delete()
result['changed'] = True
else:
result['changed'] = False
except BotoServerError:
result['msg'] = 'Failed to delete dynamo table due to error: ' + traceback.format_exc()
module.fail_json(**result)
else:
module.exit_json(**result)
def dynamo_table_exists(table):
try:
table.describe()
return True
except JSONResponseError, e:
if e.message and e.message.startswith('Requested resource not found'):
return False
else:
raise e
def update_dynamo_table(table, throughput=None, check_mode=False, global_indexes=None):
table.describe() # populate table details
throughput_changed = False
global_indexes_changed = False
if has_throughput_changed(table, throughput):
if not check_mode:
throughput_changed = table.update(throughput=throughput)
else:
throughput_changed = True
removed_indexes, added_indexes, index_throughput_changes = get_changed_global_indexes(table, global_indexes)
if removed_indexes:
if not check_mode:
for name, index in removed_indexes.iteritems():
global_indexes_changed = table.delete_global_secondary_index(name) or global_indexes_changed
else:
global_indexes_changed = True
if added_indexes:
if not check_mode:
for name, index in added_indexes.iteritems():
global_indexes_changed = table.create_global_secondary_index(global_index=index) or global_indexes_changed
else:
global_indexes_changed = True
if index_throughput_changes:
if not check_mode:
# todo: remove try once boto has https://github.com/boto/boto/pull/3447 fixed
try:
global_indexes_changed = table.update_global_secondary_index(global_indexes=index_throughput_changes) or global_indexes_changed
except ValidationException as e:
pass
else:
global_indexes_changed = True
return throughput_changed or global_indexes_changed
def has_throughput_changed(table, new_throughput):
if not new_throughput:
return False
return new_throughput['read'] != table.throughput['read'] or \
new_throughput['write'] != table.throughput['write']
def get_schema_param(hash_key_name, hash_key_type, range_key_name, range_key_type):
if range_key_name:
schema = [
HashKey(hash_key_name, DYNAMO_TYPE_MAP.get(hash_key_type, DYNAMO_TYPE_MAP[DYNAMO_TYPE_DEFAULT])),
RangeKey(range_key_name, DYNAMO_TYPE_MAP.get(range_key_type, DYNAMO_TYPE_MAP[DYNAMO_TYPE_DEFAULT]))
]
else:
schema = [
HashKey(hash_key_name, DYNAMO_TYPE_MAP.get(hash_key_type, DYNAMO_TYPE_MAP[DYNAMO_TYPE_DEFAULT]))
]
return schema
def get_changed_global_indexes(table, global_indexes):
table.describe()
table_index_info = dict((index.name, index.schema()) for index in table.global_indexes)
table_index_objects = dict((index.name, index) for index in table.global_indexes)
set_index_info = dict((index.name, index.schema()) for index in global_indexes)
set_index_objects = dict((index.name, index) for index in global_indexes)
removed_indexes = dict((name, index) for name, index in table_index_info.iteritems() if name not in set_index_info)
added_indexes = dict((name, set_index_objects[name]) for name, index in set_index_info.iteritems() if name not in table_index_info)
# todo: uncomment once boto has https://github.com/boto/boto/pull/3447 fixed
# index_throughput_changes = dict((name, index.throughput) for name, index in set_index_objects.iteritems() if name not in added_indexes and (index.throughput['read'] != str(table_index_objects[name].throughput['read']) or index.throughput['write'] != str(table_index_objects[name].throughput['write'])))
# todo: remove once boto has https://github.com/boto/boto/pull/3447 fixed
index_throughput_changes = dict((name, index.throughput) for name, index in set_index_objects.iteritems() if name not in added_indexes)
return removed_indexes, added_indexes, index_throughput_changes
def validate_index(index, module):
for key, val in index.iteritems():
if key not in INDEX_OPTIONS:
module.fail_json(msg='%s is not a valid option for an index' % key)
for required_option in INDEX_REQUIRED_OPTIONS:
if required_option not in index:
module.fail_json(msg='%s is a required option for an index' % required_option)
if index['type'] not in INDEX_TYPE_OPTIONS:
module.fail_json(msg='%s is not a valid index type, must be one of %s' % (index['type'], INDEX_TYPE_OPTIONS))
def get_indexes(all_indexes):
indexes = []
global_indexes = []
for index in all_indexes:
name = index['name']
schema = get_schema_param(index.get('hash_key_name'), index.get('hash_key_type'), index.get('range_key_name'), index.get('range_key_type'))
throughput = {
'read': index.get('read_capacity', 1),
'write': index.get('write_capacity', 1)
}
if index['type'] == 'all':
indexes.append(AllIndex(name, parts=schema))
elif index['type'] == 'global_all':
global_indexes.append(GlobalAllIndex(name, parts=schema, throughput=throughput))
elif index['type'] == 'global_include':
global_indexes.append(GlobalIncludeIndex(name, parts=schema, throughput=throughput, includes=index['includes']))
elif index['type'] == 'global_keys_only':
global_indexes.append(GlobalKeysOnlyIndex(name, parts=schema, throughput=throughput))
elif index['type'] == 'include':
indexes.append(IncludeIndex(name, parts=schema, includes=index['includes']))
elif index['type'] == 'keys_only':
indexes.append(KeysOnlyIndex(name, parts=schema))
return indexes, global_indexes
def main():
argument_spec = ec2_argument_spec()
argument_spec.update(dict(
state=dict(default='present', choices=['present', 'absent']),
name=dict(required=True, type='str'),
hash_key_name=dict(required=True, type='str'),
hash_key_type=dict(default='STRING', type='str', choices=['STRING', 'NUMBER', 'BINARY']),
range_key_name=dict(type='str'),
range_key_type=dict(default='STRING', type='str', choices=['STRING', 'NUMBER', 'BINARY']),
read_capacity=dict(default=1, type='int'),
write_capacity=dict(default=1, type='int'),
indexes=dict(default=[], type='list'),
))
module = AnsibleModule(
argument_spec=argument_spec,
supports_check_mode=True)
if not HAS_BOTO:
module.fail_json(msg='boto required for this module')
region, ec2_url, aws_connect_params = get_aws_connection_info(module)
if not region:
module.fail_json(msg='region must be specified')
try:
connection = connect_to_aws(boto.dynamodb2, region, **aws_connect_params)
except (NoAuthHandlerFound, AnsibleAWSError), e:
module.fail_json(msg=str(e))
state = module.params.get('state')
if state == 'present':
create_or_update_dynamo_table(connection, module)
elif state == 'absent':
delete_dynamo_table(connection, module)
# import module snippets
from ansible.module_utils.basic import *
from ansible.module_utils.ec2 import *
if __name__ == '__main__':
main()