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337 lines
13 KiB
Python
337 lines
13 KiB
Python
#!/usr/bin/python
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# -*- coding: utf-8 -*-
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# (c) 2014, Mischa Peters <mpeters@a10networks.com>,
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# Eric Chou <ericc@a10networks.com>
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#
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# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
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from __future__ import absolute_import, division, print_function
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__metaclass__ = type
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ANSIBLE_METADATA = {'metadata_version': '1.1',
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'status': ['preview'],
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'supported_by': 'community'}
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DOCUMENTATION = '''
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---
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module: a10_service_group
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version_added: 1.8
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short_description: Manage A10 Networks AX/SoftAX/Thunder/vThunder devices' service groups.
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description:
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- Manage SLB (Server Load Balancing) service-group objects on A10 Networks devices via aXAPIv2.
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author: "Eric Chou (@ericchou) 2016, Mischa Peters (@mischapeters) 2014"
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notes:
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- Requires A10 Networks aXAPI 2.1.
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- When a server doesn't exist and is added to the service-group the server will be created.
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extends_documentation_fragment:
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- a10
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- url
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options:
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state:
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description:
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- If the specified service group should exists.
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default: present
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choices: ['present', 'absent']
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partition:
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version_added: "2.3"
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description:
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- set active-partition
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service_group:
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description:
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- The SLB (Server Load Balancing) service-group name
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required: true
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aliases: ['service', 'pool', 'group']
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service_group_protocol:
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description:
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- The SLB service-group protocol of TCP or UDP.
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default: tcp
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aliases: ['proto', 'protocol']
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choices: ['tcp', 'udp']
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service_group_method:
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description:
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- The SLB service-group load balancing method, such as round-robin or weighted-rr.
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default: round-robin
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aliases: ['method']
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choices:
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- 'round-robin'
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- 'weighted-rr'
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- 'least-connection'
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- 'weighted-least-connection'
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- 'service-least-connection'
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- 'service-weighted-least-connection'
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- 'fastest-response'
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- 'least-request'
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- 'round-robin-strict'
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- 'src-ip-only-hash'
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- 'src-ip-hash'
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servers:
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description:
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- A list of servers to add to the service group. Each list item should be a
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dictionary which specifies the C(server:) and C(port:), but can also optionally
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specify the C(status:). See the examples below for details.
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aliases: ['server', 'member']
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validate_certs:
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description:
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- If C(no), SSL certificates will not be validated. This should only be used
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on personally controlled devices using self-signed certificates.
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type: bool
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default: 'yes'
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'''
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EXAMPLES = '''
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# Create a new service-group
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- a10_service_group:
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host: a10.mydomain.com
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username: myadmin
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password: mypassword
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partition: mypartition
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service_group: sg-80-tcp
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servers:
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- server: foo1.mydomain.com
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port: 8080
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- server: foo2.mydomain.com
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port: 8080
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- server: foo3.mydomain.com
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port: 8080
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- server: foo4.mydomain.com
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port: 8080
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status: disabled
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'''
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RETURN = '''
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content:
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description: the full info regarding the slb_service_group
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returned: success
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type: string
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sample: "mynewservicegroup"
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'''
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import json
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from ansible.module_utils.network.a10.a10 import (axapi_call, a10_argument_spec, axapi_authenticate, axapi_failure, axapi_enabled_disabled)
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from ansible.module_utils.basic import AnsibleModule
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from ansible.module_utils.urls import url_argument_spec
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VALID_SERVICE_GROUP_FIELDS = ['name', 'protocol', 'lb_method']
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VALID_SERVER_FIELDS = ['server', 'port', 'status']
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def validate_servers(module, servers):
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for item in servers:
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for key in item:
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if key not in VALID_SERVER_FIELDS:
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module.fail_json(msg="invalid server field (%s), must be one of: %s" % (key, ','.join(VALID_SERVER_FIELDS)))
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# validate the server name is present
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if 'server' not in item:
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module.fail_json(msg="server definitions must define the server field")
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# validate the port number is present and an integer
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if 'port' in item:
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try:
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item['port'] = int(item['port'])
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except:
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module.fail_json(msg="server port definitions must be integers")
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else:
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module.fail_json(msg="server definitions must define the port field")
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# convert the status to the internal API integer value
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if 'status' in item:
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item['status'] = axapi_enabled_disabled(item['status'])
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else:
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item['status'] = 1
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def main():
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argument_spec = a10_argument_spec()
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argument_spec.update(url_argument_spec())
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argument_spec.update(
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dict(
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state=dict(type='str', default='present', choices=['present', 'absent']),
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service_group=dict(type='str', aliases=['service', 'pool', 'group'], required=True),
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service_group_protocol=dict(type='str', default='tcp', aliases=['proto', 'protocol'], choices=['tcp', 'udp']),
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service_group_method=dict(type='str', default='round-robin',
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aliases=['method'],
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choices=['round-robin',
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'weighted-rr',
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'least-connection',
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'weighted-least-connection',
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'service-least-connection',
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'service-weighted-least-connection',
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'fastest-response',
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'least-request',
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'round-robin-strict',
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'src-ip-only-hash',
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'src-ip-hash']),
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servers=dict(type='list', aliases=['server', 'member'], default=[]),
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partition=dict(type='str', default=[]),
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)
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)
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module = AnsibleModule(
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argument_spec=argument_spec,
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supports_check_mode=False
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)
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host = module.params['host']
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username = module.params['username']
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password = module.params['password']
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partition = module.params['partition']
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state = module.params['state']
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write_config = module.params['write_config']
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slb_service_group = module.params['service_group']
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slb_service_group_proto = module.params['service_group_protocol']
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slb_service_group_method = module.params['service_group_method']
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slb_servers = module.params['servers']
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if slb_service_group is None:
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module.fail_json(msg='service_group is required')
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axapi_base_url = 'https://' + host + '/services/rest/V2.1/?format=json'
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load_balancing_methods = {'round-robin': 0,
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'weighted-rr': 1,
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'least-connection': 2,
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'weighted-least-connection': 3,
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'service-least-connection': 4,
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'service-weighted-least-connection': 5,
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'fastest-response': 6,
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'least-request': 7,
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'round-robin-strict': 8,
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'src-ip-only-hash': 14,
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'src-ip-hash': 15}
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if not slb_service_group_proto or slb_service_group_proto.lower() == 'tcp':
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protocol = 2
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else:
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protocol = 3
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# validate the server data list structure
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validate_servers(module, slb_servers)
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json_post = {
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'service_group': {
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'name': slb_service_group,
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'protocol': protocol,
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'lb_method': load_balancing_methods[slb_service_group_method],
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}
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}
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# first we authenticate to get a session id
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session_url = axapi_authenticate(module, axapi_base_url, username, password)
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# then we select the active-partition
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axapi_call(module, session_url + '&method=system.partition.active', json.dumps({'name': partition}))
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# then we check to see if the specified group exists
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slb_result = axapi_call(module, session_url + '&method=slb.service_group.search', json.dumps({'name': slb_service_group}))
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slb_service_group_exist = not axapi_failure(slb_result)
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changed = False
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if state == 'present':
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# before creating/updating we need to validate that servers
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# defined in the servers list exist to prevent errors
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checked_servers = []
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for server in slb_servers:
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result = axapi_call(module, session_url + '&method=slb.server.search', json.dumps({'name': server['server']}))
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if axapi_failure(result):
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module.fail_json(msg="the server %s specified in the servers list does not exist" % server['server'])
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checked_servers.append(server['server'])
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if not slb_service_group_exist:
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result = axapi_call(module, session_url + '&method=slb.service_group.create', json.dumps(json_post))
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if axapi_failure(result):
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module.fail_json(msg=result['response']['err']['msg'])
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changed = True
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else:
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# check to see if the service group definition without the
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# server members is different, and update that individually
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# if it needs it
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do_update = False
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for field in VALID_SERVICE_GROUP_FIELDS:
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if json_post['service_group'][field] != slb_result['service_group'][field]:
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do_update = True
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break
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if do_update:
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result = axapi_call(module, session_url + '&method=slb.service_group.update', json.dumps(json_post))
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if axapi_failure(result):
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module.fail_json(msg=result['response']['err']['msg'])
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changed = True
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# next we pull the defined list of servers out of the returned
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# results to make it a bit easier to iterate over
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defined_servers = slb_result.get('service_group', {}).get('member_list', [])
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# next we add/update new member servers from the user-specified
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# list if they're different or not on the target device
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for server in slb_servers:
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found = False
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different = False
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for def_server in defined_servers:
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if server['server'] == def_server['server']:
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found = True
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for valid_field in VALID_SERVER_FIELDS:
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if server[valid_field] != def_server[valid_field]:
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different = True
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break
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if found or different:
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break
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# add or update as required
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server_data = {
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"name": slb_service_group,
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"member": server,
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}
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if not found:
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result = axapi_call(module, session_url + '&method=slb.service_group.member.create', json.dumps(server_data))
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changed = True
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elif different:
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result = axapi_call(module, session_url + '&method=slb.service_group.member.update', json.dumps(server_data))
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changed = True
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# finally, remove any servers that are on the target
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# device but were not specified in the list given
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for server in defined_servers:
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found = False
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for slb_server in slb_servers:
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if server['server'] == slb_server['server']:
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found = True
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break
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# remove if not found
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server_data = {
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"name": slb_service_group,
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"member": server,
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}
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if not found:
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result = axapi_call(module, session_url + '&method=slb.service_group.member.delete', json.dumps(server_data))
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changed = True
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# if we changed things, get the full info regarding
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# the service group for the return data below
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if changed:
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result = axapi_call(module, session_url + '&method=slb.service_group.search', json.dumps({'name': slb_service_group}))
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else:
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result = slb_result
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elif state == 'absent':
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if slb_service_group_exist:
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result = axapi_call(module, session_url + '&method=slb.service_group.delete', json.dumps({'name': slb_service_group}))
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changed = True
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else:
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result = dict(msg="the service group was not present")
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# if the config has changed, save the config unless otherwise requested
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if changed and write_config:
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write_result = axapi_call(module, session_url + '&method=system.action.write_memory')
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if axapi_failure(write_result):
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module.fail_json(msg="failed to save the configuration: %s" % write_result['response']['err']['msg'])
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# log out of the session nicely and exit
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axapi_call(module, session_url + '&method=session.close')
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module.exit_json(changed=changed, content=result)
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if __name__ == '__main__':
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main()
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