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480 lines
18 KiB
Python
480 lines
18 KiB
Python
#!/usr/bin/python
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# -*- coding: utf-8 -*-
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# (c) 2013, Matt Hite <mhite@hotmail.com>
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#
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# This file is part of Ansible
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#
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# Ansible is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# Ansible is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
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DOCUMENTATION = '''
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---
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module: bigip_pool
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short_description: "Manages F5 BIG-IP LTM pools"
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description:
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- "Manages F5 BIG-IP LTM pools via iControl SOAP API"
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version_added: "1.2"
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author: Matt Hite
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notes:
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- "Requires BIG-IP software version >= 11"
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- "F5 developed module 'bigsuds' required (see http://devcentral.f5.com)"
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- "Best run as a local_action in your playbook"
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requirements:
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- bigsuds
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options:
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server:
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description:
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- BIG-IP host
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required: true
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default: null
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choices: []
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aliases: []
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user:
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description:
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- BIG-IP username
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required: true
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default: null
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choices: []
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aliases: []
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password:
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description:
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- BIG-IP password
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required: true
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default: null
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choices: []
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aliases: []
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state:
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description:
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- Pool state
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required: false
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default: present
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choices: ['present', 'absent']
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aliases: []
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name:
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description:
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- Pool name
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required: true
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default: null
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choices: []
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aliases: ['pool']
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partition:
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description:
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- Partition
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required: false
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default: 'Common'
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choices: []
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aliases: []
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lb_method:
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description:
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- Load balancing method
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required: False
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default: 'round_robin'
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choices: ['round_robin', 'ratio_member', 'least_connection_member',
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'observed_member', 'predictive_member', 'ratio_node_address',
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'least_connection_node_address', 'fastest_node_address',
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'observed_node_address', 'predictive_node_address',
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'dynamic_ratio', 'fastest_app_response', 'least_sessions',
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'dynamic_ratio_member', 'l3_addr', 'unknown',
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'weighted_least_connection_member',
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'weighted_least_connection_node_address',
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'ratio_session', 'ratio_least_connection_member',
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'ratio_least_connection_node_address']
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aliases: []
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monitor_type:
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description:
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- Monitor rule type when monitors > 1
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required: False
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default: null
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choices: ['and_list', 'm_of_n']
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aliases: []
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quorum:
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description:
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- Monitor quorum value when monitor_type is m_of_n
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required: False
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default: null
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choices: []
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aliases: []
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monitors:
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description:
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- Monitor template name list
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required: False
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default: null
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choices: []
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aliases: []
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slow_ramp_time:
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description:
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- Sets the ramp-up time (in seconds) to gradually ramp up the load on newly added or freshly detected UP pool members
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required: False
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default: null
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choices: []
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aliases: []
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service_down_action:
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description:
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- Sets the action to take when node goes down in pool
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required: False
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default: null
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choices: ['none', 'reset', 'drop', 'reselect']
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aliases: []
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host:
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description:
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- "Pool member IP"
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required: False
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default: null
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choices: []
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aliases: ['address']
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port:
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description:
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- "Pool member port"
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required: False
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default: null
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choices: []
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aliases: []
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'''
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EXAMPLES = '''
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### Examples assume [localhost] is defined in inventory file
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## ad-hoc ansible CLI example
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# Create (or update) pool /matthite/matthite-pool on load balancer lb.mydomain.com
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ansible -c local localhost -m bigip_pool -a "server=lb.mydomain.com user=admin password=mysecret state=present name=matthite-pool partition=matthite lb_method=least_connection_member slow_ramp_time=120"
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# Remove pool /matthite/matthite-pool on load balancer lb.mydomain.com
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ansible -c local localhost -m bigip_pool -a "server=lb.mydomain.com user=admin password=mysecret state=absent name=matthite-pool partition=matthite"
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# Add pool member /matthite/1.1.1.1:80 to pool /matthite/matthite-pool on load balancer lb.mydomain.com
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ansible -c local localhost -m bigip_pool -a "server=lb.mydomain.com user=admin password=mysecret state=present name=matthite-pool partition=matthite host=1.1.1.1 port=80"
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# Remove pool member /matthite/1.1.1.1:80 to pool /matthite/matthite-pool on load balancer lb.mydomain.com
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ansible -c local localhost -m bigip_pool -a "server=lb.mydomain.com user=admin password=mysecret state=absent name=matthite-pool partition=matthite host=1.1.1.1 port=80"
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## playbook task example:
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---
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# file bigip-test.yml
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# ...
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tasks:
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- name: Create /matthite/matthite-pool
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local_action: bigip_pool server=lb.mydomain.com user=admin password=mysecret state=present name=matthite-pool partition=matthite lb_method=least_connection_member slow_ramp_time=120
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'''
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try:
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import bigsuds
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except ImportError:
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bigsuds_found = False
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else:
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bigsuds_found = True
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# ===========================================
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# bigip_pool module specific support methods.
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#
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def bigip_api(bigip, user, password):
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api = bigsuds.BIGIP(hostname=bigip, username=user, password=password)
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return api
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def pool_exists(api, pool):
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# hack to determine if pool exists
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result = False
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try:
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api.LocalLB.Pool.get_object_status(pool_names=[pool])
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result = True
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except bigsuds.OperationFailed, e:
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if "was not found" in str(e):
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result = False
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else:
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# genuine exception
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raise
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return result
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def create_pool(api, pool, lb_method):
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# create requires lb_method but we don't want to default
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# to a value on subsequent runs
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if not lb_method:
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lb_method = 'round_robin'
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lb_method = "LB_METHOD_%s" % lb_method.strip().upper()
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api.LocalLB.Pool.create_v2(pool_names=[pool], lb_methods=[lb_method],
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members=[[]])
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def remove_pool(api, pool):
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api.LocalLB.Pool.delete_pool(pool_names=[pool])
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def get_lb_method(api, pool):
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lb_method = api.LocalLB.Pool.get_lb_method(pool_names=[pool])[0]
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lb_method = lb_method.strip().replace('LB_METHOD_', '').lower()
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return lb_method
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def set_lb_method(api, pool, lb_method):
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lb_method = "LB_METHOD_%s" % lb_method.strip().upper()
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api.LocalLB.Pool.set_lb_method(pool_names=[pool], lb_methods=[lb_method])
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def get_monitors(api, pool):
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result = api.LocalLB.Pool.get_monitor_association(pool_names=[pool])[0]['monitor_rule']
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monitor_type = result['type'].split("MONITOR_RULE_TYPE_")[-1].lower()
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quorum = result['quorum']
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monitor_templates = result['monitor_templates']
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return (monitor_type, quorum, monitor_templates)
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def set_monitors(api, pool, monitor_type, quorum, monitor_templates):
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monitor_type = "MONITOR_RULE_TYPE_%s" % monitor_type.strip().upper()
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monitor_rule = {'type': monitor_type, 'quorum': quorum, 'monitor_templates': monitor_templates}
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monitor_association = {'pool_name': pool, 'monitor_rule': monitor_rule}
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api.LocalLB.Pool.set_monitor_association(monitor_associations=[monitor_association])
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def get_slow_ramp_time(api, pool):
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result = api.LocalLB.Pool.get_slow_ramp_time(pool_names=[pool])[0]
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return result
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def set_slow_ramp_time(api, pool, seconds):
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api.LocalLB.Pool.set_slow_ramp_time(pool_names=[pool], values=[seconds])
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def get_action_on_service_down(api, pool):
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result = api.LocalLB.Pool.get_action_on_service_down(pool_names=[pool])[0]
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result = result.split("SERVICE_DOWN_ACTION_")[-1].lower()
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return result
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def set_action_on_service_down(api, pool, action):
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action = "SERVICE_DOWN_ACTION_%s" % action.strip().upper()
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api.LocalLB.Pool.set_action_on_service_down(pool_names=[pool], actions=[action])
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def member_exists(api, pool, address, port):
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# hack to determine if member exists
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result = False
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try:
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members = [{'address': address, 'port': port}]
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api.LocalLB.Pool.get_member_object_status(pool_names=[pool],
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members=[members])
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result = True
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except bigsuds.OperationFailed, e:
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if "was not found" in str(e):
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result = False
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else:
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# genuine exception
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raise
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return result
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def delete_node_address(api, address):
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result = False
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try:
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api.LocalLB.NodeAddressV2.delete_node_address(nodes=[address])
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result = True
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except bigsuds.OperationFailed, e:
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if "is referenced by a member of pool" in str(e):
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result = False
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else:
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# genuine exception
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raise
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return result
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def remove_pool_member(api, pool, address, port):
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members = [{'address': address, 'port': port}]
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api.LocalLB.Pool.remove_member_v2(pool_names=[pool], members=[members])
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def add_pool_member(api, pool, address, port):
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members = [{'address': address, 'port': port}]
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api.LocalLB.Pool.add_member_v2(pool_names=[pool], members=[members])
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def main():
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lb_method_choices = ['round_robin', 'ratio_member',
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'least_connection_member', 'observed_member',
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'predictive_member', 'ratio_node_address',
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'least_connection_node_address',
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'fastest_node_address', 'observed_node_address',
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'predictive_node_address', 'dynamic_ratio',
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'fastest_app_response', 'least_sessions',
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'dynamic_ratio_member', 'l3_addr', 'unknown',
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'weighted_least_connection_member',
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'weighted_least_connection_node_address',
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'ratio_session', 'ratio_least_connection_member',
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'ratio_least_connection_node_address']
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monitor_type_choices = ['and_list', 'm_of_n']
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service_down_choices = ['none', 'reset', 'drop', 'reselect']
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module = AnsibleModule(
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argument_spec = dict(
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server = dict(type='str', required=True),
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user = dict(type='str', required=True),
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password = dict(type='str', required=True),
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state = dict(type='str', default='present', choices=['present', 'absent']),
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name = dict(type='str', required=True, aliases=['pool']),
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partition = dict(type='str', default='Common'),
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lb_method = dict(type='str', choices=lb_method_choices),
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monitor_type = dict(type='str', choices=monitor_type_choices),
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quorum = dict(type='int'),
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monitors = dict(type='list'),
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slow_ramp_time = dict(type='int'),
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service_down_action = dict(type='str', choices=service_down_choices),
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host = dict(type='str', aliases=['address']),
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port = dict(type='int')
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),
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supports_check_mode=True
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)
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if not bigsuds_found:
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module.fail_json(msg="the python bigsuds module is required")
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server = module.params['server']
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user = module.params['user']
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password = module.params['password']
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state = module.params['state']
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name = module.params['name']
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partition = module.params['partition']
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pool = "/%s/%s" % (partition, name)
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lb_method = module.params['lb_method']
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if lb_method:
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lb_method = lb_method.lower()
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monitor_type = module.params['monitor_type']
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if monitor_type:
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monitor_type = monitor_type.lower()
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quorum = module.params['quorum']
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monitors = module.params['monitors']
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slow_ramp_time = module.params['slow_ramp_time']
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service_down_action = module.params['service_down_action']
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if service_down_action:
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service_down_action = service_down_action.lower()
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host = module.params['host']
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address = "/%s/%s" % (partition, host)
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port = module.params['port']
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# sanity check user supplied values
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if (host and not port) or (port and not host):
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module.fail_json(msg="both host and port must be supplied")
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if 1 > port > 65535:
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module.fail_json(msg="valid ports must be in range 1 - 65535")
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if monitors:
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if len(monitors) == 1:
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# set default required values for single monitor
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quorum = 0
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monitor_type = 'single'
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elif len(monitors) > 1:
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if not monitor_type:
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module.fail_json(msg="monitor_type required for monitors > 1")
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if monitor_type == 'm_of_n' and not quorum:
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module.fail_json(msg="quorum value required for monitor_type m_of_n")
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if monitor_type != 'm_of_n':
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quorum = 0
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elif monitor_type:
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# no monitors specified but monitor_type exists
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module.fail_json(msg="monitor_type require monitors parameter")
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elif quorum is not None:
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# no monitors specified but quorum exists
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module.fail_json(msg="quorum requires monitors parameter")
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try:
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api = bigip_api(server, user, password)
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result = {'changed': False} # default
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if state == 'absent':
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if host and port and pool:
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# member removal takes precedent
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if pool_exists(api, pool) and member_exists(api, pool, address, port):
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if not module.check_mode:
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remove_pool_member(api, pool, address, port)
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deleted = delete_node_address(api, address)
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result = {'changed': True, 'deleted': deleted}
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else:
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result = {'changed': True}
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elif pool_exists(api, pool):
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# no host/port supplied, must be pool removal
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if not module.check_mode:
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# hack to handle concurrent runs of module
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# pool might be gone before we actually remove it
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try:
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remove_pool(api, pool)
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result = {'changed': True}
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except bigsuds.OperationFailed, e:
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if "was not found" in str(e):
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result = {'changed': False}
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else:
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# genuine exception
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raise
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else:
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# check-mode return value
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result = {'changed': True}
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elif state == 'present':
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update = False
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if not pool_exists(api, pool):
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# pool does not exist -- need to create it
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if not module.check_mode:
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# a bit of a hack to handle concurrent runs of this module.
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# even though we've checked the pool doesn't exist,
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# it may exist by the time we run create_pool().
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# this catches the exception and does something smart
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# about it!
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try:
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create_pool(api, pool, lb_method)
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result = {'changed': True}
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except bigsuds.OperationFailed, e:
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if "already exists" in str(e):
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update = True
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else:
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# genuine exception
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raise
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else:
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if monitors:
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set_monitors(api, pool, monitor_type, quorum, monitors)
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if slow_ramp_time:
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set_slow_ramp_time(api, pool, slow_ramp_time)
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if service_down_action:
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set_action_on_service_down(api, pool, service_down_action)
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if host and port:
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add_pool_member(api, pool, address, port)
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else:
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# check-mode return value
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result = {'changed': True}
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else:
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# pool exists -- potentially modify attributes
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update = True
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if update:
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if lb_method and lb_method != get_lb_method(api, pool):
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if not module.check_mode:
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set_lb_method(api, pool, lb_method)
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result = {'changed': True}
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if monitors:
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t_monitor_type, t_quorum, t_monitor_templates = get_monitors(api, pool)
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if (t_monitor_type != monitor_type) or (t_quorum != quorum) or (set(t_monitor_templates) != set(monitors)):
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if not module.check_mode:
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set_monitors(api, pool, monitor_type, quorum, monitors)
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result = {'changed': True}
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if slow_ramp_time and slow_ramp_time != get_slow_ramp_time(api, pool):
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if not module.check_mode:
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set_slow_ramp_time(api, pool, slow_ramp_time)
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result = {'changed': True}
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if service_down_action and service_down_action != get_action_on_service_down(api, pool):
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if not module.check_mode:
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set_action_on_service_down(api, pool, service_down_action)
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result = {'changed': True}
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if (host and port) and not member_exists(api, pool, address, port):
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if not module.check_mode:
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add_pool_member(api, pool, address, port)
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result = {'changed': True}
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except Exception, e:
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module.fail_json(msg="received exception: %s" % e)
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module.exit_json(**result)
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# include magic from lib/ansible/module_common.py
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#<<INCLUDE_ANSIBLE_MODULE_COMMON>>
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main()
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