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clc_loadbalancer.py
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#!/usr/bin/python # # Copyright (c) 2015 CenturyLink # # GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt) from __future__ import absolute_import, division, print_function __metaclass__ = type ANSIBLE_METADATA = {'metadata_version': '1.1', 'status': ['preview'], 'supported_by': 'community'} DOCUMENTATION = ''' module: clc_loadbalancer short_description: Create, Delete shared loadbalancers in CenturyLink Cloud. description: - An Ansible module to Create, Delete shared loadbalancers in CenturyLink Cloud. version_added: "2.0" options: name: description: - The name of the loadbalancer required: True description: description: - A description for the loadbalancer alias: description: - The alias of your CLC Account required: True location: description: - The location of the datacenter where the load balancer resides in required: True method: description: -The balancing method for the load balancer pool choices: ['leastConnection', 'roundRobin'] persistence: description: - The persistence method for the load balancer choices: ['standard', 'sticky'] port: description: - Port to configure on the public-facing side of the load balancer pool choices: [80, 443] nodes: description: - A list of nodes that needs to be added to the load balancer pool default: [] status: description: - The status of the loadbalancer default: enabled choices: ['enabled', 'disabled'] state: description: - Whether to create or delete the load balancer pool default: present choices: ['present', 'absent', 'port_absent', 'nodes_present', 'nodes_absent'] requirements: - python = 2.7 - requests >= 2.5.0 - clc-sdk author: "CLC Runner (@clc-runner)" notes: - To use this module, it is required to set the below environment variables which enables access to the Centurylink Cloud - CLC_V2_API_USERNAME, the account login id for the centurylink cloud - CLC_V2_API_PASSWORD, the account password for the centurylink cloud - Alternatively, the module accepts the API token and account alias. The API token can be generated using the CLC account login and password via the HTTP api call @ https://api.ctl.io/v2/authentication/login - CLC_V2_API_TOKEN, the API token generated from https://api.ctl.io/v2/authentication/login - CLC_ACCT_ALIAS, the account alias associated with the centurylink cloud - Users can set CLC_V2_API_URL to specify an endpoint for pointing to a different CLC environment. ''' EXAMPLES = ''' # Note - You must set the CLC_V2_API_USERNAME And CLC_V2_API_PASSWD Environment variables before running these examples - name: Create Loadbalancer hosts: localhost connection: local tasks: - name: Actually Create things clc_loadbalancer: name: test description: test alias: TEST location: WA1 port: 443 nodes: - ipAddress: 10.11.22.123 privatePort: 80 state: present - name: Add node to an existing loadbalancer pool hosts: localhost connection: local tasks: - name: Actually Create things clc_loadbalancer: name: test description: test alias: TEST location: WA1 port: 443 nodes: - ipAddress: 10.11.22.234 privatePort: 80 state: nodes_present - name: Remove node from an existing loadbalancer pool hosts: localhost connection: local tasks: - name: Actually Create things clc_loadbalancer: name: test description: test alias: TEST location: WA1 port: 443 nodes: - ipAddress: 10.11.22.234 privatePort: 80 state: nodes_absent - name: Delete LoadbalancerPool hosts: localhost connection: local tasks: - name: Actually Delete things clc_loadbalancer: name: test description: test alias: TEST location: WA1 port: 443 nodes: - ipAddress: 10.11.22.123 privatePort: 80 state: port_absent - name: Delete Loadbalancer hosts: localhost connection: local tasks: - name: Actually Delete things clc_loadbalancer: name: test description: test alias: TEST location: WA1 port: 443 nodes: - ipAddress: 10.11.22.123 privatePort: 80 state: absent ''' RETURN = ''' loadbalancer: description: The load balancer result object from CLC returned: success type: dict sample: { "description":"test-lb", "id":"ab5b18cb81e94ab9925b61d1ca043fb5", "ipAddress":"66.150.174.197", "links":[ { "href":"/v2/sharedLoadBalancers/wfad/wa1/ab5b18cb81e94ab9925b61d1ca043fb5", "rel":"self", "verbs":[ "GET", "PUT", "DELETE" ] }, { "href":"/v2/sharedLoadBalancers/wfad/wa1/ab5b18cb81e94ab9925b61d1ca043fb5/pools", "rel":"pools", "verbs":[ "GET", "POST" ] } ], "name":"test-lb", "pools":[ ], "status":"enabled" } ''' __version__ = '${version}' import json import os import traceback from time import sleep from distutils.version import LooseVersion REQUESTS_IMP_ERR = None try: import requests except ImportError: REQUESTS_IMP_ERR = traceback.format_exc() REQUESTS_FOUND = False else: REQUESTS_FOUND = True # # Requires the clc-python-sdk. # sudo pip install clc-sdk # CLC_IMP_ERR = None try: import clc as clc_sdk from clc import APIFailedResponse except ImportError: CLC_IMP_ERR = traceback.format_exc() CLC_FOUND = False clc_sdk = None else: CLC_FOUND = True from ansible.module_utils.basic import AnsibleModule, missing_required_lib class ClcLoadBalancer: clc = None def __init__(self, module): """ Construct module """ self.clc = clc_sdk self.module = module self.lb_dict = {} if not CLC_FOUND: self.module.fail_json(msg=missing_required_lib('clc-sdk'), exception=CLC_IMP_ERR) if not REQUESTS_FOUND: self.module.fail_json(msg=missing_required_lib('requests'), exception=REQUESTS_IMP_ERR) if requests.__version__ and LooseVersion( requests.__version__) < LooseVersion('2.5.0'): self.module.fail_json( msg='requests library version should be >= 2.5.0') self._set_user_agent(self.clc) def process_request(self): """ Execute the main code path, and handle the request :return: none """ changed = False result_lb = None loadbalancer_name = self.module.params.get('name') loadbalancer_alias = self.module.params.get('alias') loadbalancer_location = self.module.params.get('location') loadbalancer_description = self.module.params.get('description') loadbalancer_port = self.module.params.get('port') loadbalancer_method = self.module.params.get('method') loadbalancer_persistence = self.module.params.get('persistence') loadbalancer_nodes = self.module.params.get('nodes') loadbalancer_status = self.module.params.get('status') state = self.module.params.get('state') if loadbalancer_description is None: loadbalancer_description = loadbalancer_name self._set_clc_credentials_from_env() self.lb_dict = self._get_loadbalancer_list( alias=loadbalancer_alias, location=loadbalancer_location) if state == 'present': changed, result_lb, lb_id = self.ensure_loadbalancer_present( name=loadbalancer_name, alias=loadbalancer_alias, location=loadbalancer_location, description=loadbalancer_description, status=loadbalancer_status) if loadbalancer_port: changed, result_pool, pool_id = self.ensure_loadbalancerpool_present( lb_id=lb_id, alias=loadbalancer_alias, location=loadbalancer_location, method=loadbalancer_method, persistence=loadbalancer_persistence, port=loadbalancer_port) if loadbalancer_nodes: changed, result_nodes = self.ensure_lbpool_nodes_set( alias=loadbalancer_alias, location=loadbalancer_location, name=loadbalancer_name, port=loadbalancer_port, nodes=loadbalancer_nodes) elif state == 'absent': changed, result_lb = self.ensure_loadbalancer_absent( name=loadbalancer_name, alias=loadbalancer_alias, location=loadbalancer_location) elif state == 'port_absent': changed, result_lb = self.ensure_loadbalancerpool_absent( alias=loadbalancer_alias, location=loadbalancer_location, name=loadbalancer_name, port=loadbalancer_port) elif state == 'nodes_present': changed, result_lb = self.ensure_lbpool_nodes_present( alias=loadbalancer_alias, location=loadbalancer_location, name=loadbalancer_name, port=loadbalancer_port, nodes=loadbalancer_nodes) elif state == 'nodes_absent': changed, result_lb = self.ensure_lbpool_nodes_absent( alias=loadbalancer_alias, location=loadbalancer_location, name=loadbalancer_name, port=loadbalancer_port, nodes=loadbalancer_nodes) self.module.exit_json(changed=changed, loadbalancer=result_lb) def ensure_loadbalancer_present( self, name, alias, location, description, status): """ Checks to see if a load balancer exists and creates one if it does not. :param name: Name of loadbalancer :param alias: Alias of account :param location: Datacenter :param description: Description of loadbalancer :param status: Enabled / Disabled :return: (changed, result, lb_id) changed: Boolean whether a change was made result: The result object from the CLC load balancer request lb_id: The load balancer id """ changed = False result = name lb_id = self._loadbalancer_exists(name=name) if not lb_id: if not self.module.check_mode: result = self.create_loadbalancer(name=name, alias=alias, location=location, description=description, status=status) lb_id = result.get('id') changed = True return changed, result, lb_id def ensure_loadbalancerpool_present( self, lb_id, alias, location, method, persistence, port): """ Checks to see if a load balancer pool exists and creates one if it does not. :param lb_id: The loadbalancer id :param alias: The account alias :param location: the datacenter the load balancer resides in :param method: the load balancing method :param persistence: the load balancing persistence type :param port: the port that the load balancer will listen on :return: (changed, group, pool_id) - changed: Boolean whether a change was made result: The result from the CLC API call pool_id: The string id of the load balancer pool """ changed = False result = port if not lb_id: return changed, None, None pool_id = self._loadbalancerpool_exists( alias=alias, location=location, port=port, lb_id=lb_id) if not pool_id: if not self.module.check_mode: result = self.create_loadbalancerpool( alias=alias, location=location, lb_id=lb_id, method=method, persistence=persistence, port=port) pool_id = result.get('id') changed = True return changed, result, pool_id def ensure_loadbalancer_absent(self, name, alias, location): """ Checks to see if a load balancer exists and deletes it if it does :param name: Name of the load balancer :param alias: Alias of account :param location: Datacenter :return: (changed, result) changed: Boolean whether a change was made result: The result from the CLC API Call """ changed = False result = name lb_exists = self._loadbalancer_exists(name=name) if lb_exists: if not self.module.check_mode: result = self.delete_loadbalancer(alias=alias, location=location, name=name) changed = True return changed, result def ensure_loadbalancerpool_absent(self, alias, location, name, port): """ Checks to see if a load balancer pool exists and deletes it if it does :param alias: The account alias :param location: the datacenter the load balancer resides in :param name: the name of the load balancer :param port: the port that the load balancer listens on :return: (changed, result) - changed: Boolean whether a change was made result: The result from the CLC API call """ changed = False result = None lb_exists = self._loadbalancer_exists(name=name) if lb_exists: lb_id = self._get_loadbalancer_id(name=name) pool_id = self._loadbalancerpool_exists( alias=alias, location=location, port=port, lb_id=lb_id) if pool_id: changed = True if not self.module.check_mode: result = self.delete_loadbalancerpool( alias=alias, location=location, lb_id=lb_id, pool_id=pool_id) else: result = "Pool doesn't exist" else: result = "LB Doesn't Exist" return changed, result def ensure_lbpool_nodes_set(self, alias, location, name, port, nodes): """ Checks to see if the provided list of nodes exist for the pool and set the nodes if any in the list those doesn't exist :param alias: The account alias :param location: the datacenter the load balancer resides in :param name: the name of the load balancer :param port: the port that the load balancer will listen on :param nodes: The list of nodes to be updated to the pool :return: (changed, result) - changed: Boolean whether a change was made result: The result from the CLC API call """ result = {} changed = False lb_exists = self._loadbalancer_exists(name=name) if lb_exists: lb_id = self._get_loadbalancer_id(name=name) pool_id = self._loadbalancerpool_exists( alias=alias, location=location, port=port, lb_id=lb_id) if pool_id: nodes_exist = self._loadbalancerpool_nodes_exists(alias=alias, location=location, lb_id=lb_id, pool_id=pool_id, nodes_to_check=nodes) if not nodes_exist: changed = True result = self.set_loadbalancernodes(alias=alias, location=location, lb_id=lb_id, pool_id=pool_id, nodes=nodes) else: result = "Pool doesn't exist" else: result = "Load balancer doesn't Exist" return changed, result def ensure_lbpool_nodes_present(self, alias, location, name, port, nodes): """ Checks to see if the provided list of nodes exist for the pool and add the missing nodes to the pool :param alias: The account alias :param location: the datacenter the load balancer resides in :param name: the name of the load balancer :param port: the port that the load balancer will listen on :param nodes: the list of nodes to be added :return: (changed, result) - changed: Boolean whether a change was made result: The result from the CLC API call """ changed = False lb_exists = self._loadbalancer_exists(name=name) if lb_exists: lb_id = self._get_loadbalancer_id(name=name) pool_id = self._loadbalancerpool_exists( alias=alias, location=location, port=port, lb_id=lb_id) if pool_id: changed, result = self.add_lbpool_nodes(alias=alias, location=location, lb_id=lb_id, pool_id=pool_id, nodes_to_add=nodes) else: result = "Pool doesn't exist" else: result = "Load balancer doesn't Exist" return changed, result def ensure_lbpool_nodes_absent(self, alias, location, name, port, nodes): """ Checks to see if the provided list of nodes exist for the pool and removes them if found any :param alias: The account alias :param location: the datacenter the load balancer resides in :param name: the name of the load balancer :param port: the port that the load balancer will listen on :param nodes: the list of nodes to be removed :return: (changed, result) - changed: Boolean whether a change was made result: The result from the CLC API call """ changed = False lb_exists = self._loadbalancer_exists(name=name) if lb_exists: lb_id = self._get_loadbalancer_id(name=name) pool_id = self._loadbalancerpool_exists( alias=alias, location=location, port=port, lb_id=lb_id) if pool_id: changed, result = self.remove_lbpool_nodes(alias=alias, location=location, lb_id=lb_id, pool_id=pool_id, nodes_to_remove=nodes) else: result = "Pool doesn't exist" else: result = "Load balancer doesn't Exist" return changed, result def create_loadbalancer(self, name, alias, location, description, status): """ Create a loadbalancer w/ params :param name: Name of loadbalancer :param alias: Alias of account :param location: Datacenter :param description: Description for loadbalancer to be created :param status: Enabled / Disabled :return: result: The result from the CLC API call """ result = None try: result = self.clc.v2.API.Call('POST', '/v2/sharedLoadBalancers/%s/%s' % (alias, location), json.dumps({"name": name, "description": description, "status": status})) sleep(1) except APIFailedResponse as e: self.module.fail_json( msg='Unable to create load balancer "{0}". {1}'.format( name, str(e.response_text))) return result def create_loadbalancerpool( self, alias, location, lb_id, method, persistence, port): """ Creates a pool on the provided load balancer :param alias: the account alias :param location: the datacenter the load balancer resides in :param lb_id: the id string of the load balancer :param method: the load balancing method :param persistence: the load balancing persistence type :param port: the port that the load balancer will listen on :return: result: The result from the create API call """ result = None try: result = self.clc.v2.API.Call( 'POST', '/v2/sharedLoadBalancers/%s/%s/%s/pools' % (alias, location, lb_id), json.dumps( { "port": port, "method": method, "persistence": persistence })) except APIFailedResponse as e: self.module.fail_json( msg='Unable to create pool for load balancer id "{0}". {1}'.format( lb_id, str(e.response_text))) return result def delete_loadbalancer(self, alias, location, name): """ Delete CLC loadbalancer :param alias: Alias for account :param location: Datacenter :param name: Name of the loadbalancer to delete :return: result: The result from the CLC API call """ result = None lb_id = self._get_loadbalancer_id(name=name) try: result = self.clc.v2.API.Call( 'DELETE', '/v2/sharedLoadBalancers/%s/%s/%s' % (alias, location, lb_id)) except APIFailedResponse as e: self.module.fail_json( msg='Unable to delete load balancer "{0}". {1}'.format( name, str(e.response_text))) return result def delete_loadbalancerpool(self, alias, location, lb_id, pool_id): """ Delete the pool on the provided load balancer :param alias: The account alias :param location: the datacenter the load balancer resides in :param lb_id: the id string of the load balancer :param pool_id: the id string of the load balancer pool :return: result: The result from the delete API call """ result = None try: result = self.clc.v2.API.Call( 'DELETE', '/v2/sharedLoadBalancers/%s/%s/%s/pools/%s' % (alias, location, lb_id, pool_id)) except APIFailedResponse as e: self.module.fail_json( msg='Unable to delete pool for load balancer id "{0}". {1}'.format( lb_id, str(e.response_text))) return result def _get_loadbalancer_id(self, name): """ Retrieves unique ID of loadbalancer :param name: Name of loadbalancer :return: Unique ID of the loadbalancer """ id = None for lb in self.lb_dict: if lb.get('name') == name: id = lb.get('id') return id def _get_loadbalancer_list(self, alias, location): """ Retrieve a list of loadbalancers :param alias: Alias for account :param location: Datacenter :return: JSON data for all loadbalancers at datacenter """ result = None try: result = self.clc.v2.API.Call( 'GET', '/v2/sharedLoadBalancers/%s/%s' % (alias, location)) except APIFailedResponse as e: self.module.fail_json( msg='Unable to fetch load balancers for account: {0}. {1}'.format( alias, str(e.response_text))) return result def _loadbalancer_exists(self, name): """ Verify a loadbalancer exists :param name: Name of loadbalancer :return: False or the ID of the existing loadbalancer """ result = False for lb in self.lb_dict: if lb.get('name') == name: result = lb.get('id') return result def _loadbalancerpool_exists(self, alias, location, port, lb_id): """ Checks to see if a pool exists on the specified port on the provided load balancer :param alias: the account alias :param location: the datacenter the load balancer resides in :param port: the port to check and see if it exists :param lb_id: the id string of the provided load balancer :return: result: The id string of the pool or False """ result = False try: pool_list = self.clc.v2.API.Call( 'GET', '/v2/sharedLoadBalancers/%s/%s/%s/pools' % (alias, location, lb_id)) except APIFailedResponse as e: return self.module.fail_json( msg='Unable to fetch the load balancer pools for for load balancer id: {0}. {1}'.format( lb_id, str(e.response_text))) for pool in pool_list: if int(pool.get('port')) == int(port): result = pool.get('id') return result def _loadbalancerpool_nodes_exists( self, alias, location, lb_id, pool_id, nodes_to_check): """ Checks to see if a set of nodes exists on the specified port on the provided load balancer :param alias: the account alias :param location: the datacenter the load balancer resides in :param lb_id: the id string of the provided load balancer :param pool_id: the id string of the load balancer pool :param nodes_to_check: the list of nodes to check for :return: result: True / False indicating if the given nodes exist """ result = False nodes = self._get_lbpool_nodes(alias, location, lb_id, pool_id) for node in nodes_to_check: if not node.get('status'): node['status'] = 'enabled' if node in nodes: result = True else: result = False return result def set_loadbalancernodes(self, alias, location, lb_id, pool_id, nodes): """ Updates nodes to the provided pool :param alias: the account alias :param location: the datacenter the load balancer resides in :param lb_id: the id string of the load balancer :param pool_id: the id string of the pool :param nodes: a list of dictionaries containing the nodes to set :return: result: The result from the CLC API call """ result = None if not lb_id: return result if not self.module.check_mode: try: result = self.clc.v2.API.Call('PUT', '/v2/sharedLoadBalancers/%s/%s/%s/pools/%s/nodes' % (alias, location, lb_id, pool_id), json.dumps(nodes)) except APIFailedResponse as e: self.module.fail_json( msg='Unable to set nodes for the load balancer pool id "{0}". {1}'.format( pool_id, str(e.response_text))) return result def add_lbpool_nodes(self, alias, location, lb_id, pool_id, nodes_to_add): """ Add nodes to the provided pool :param alias: the account alias :param location: the datacenter the load balancer resides in :param lb_id: the id string of the load balancer :param pool_id: the id string of the pool :param nodes_to_add: a list of dictionaries containing the nodes to add :return: (changed, result) - changed: Boolean whether a change was made result: The result from the CLC API call """ changed = False result = {} nodes = self._get_lbpool_nodes(alias, location, lb_id, pool_id) for node in nodes_to_add: if not node.get('status'): node['status'] = 'enabled' if node not in nodes: changed = True nodes.append(node) if changed is True and not self.module.check_mode: result = self.set_loadbalancernodes( alias, location, lb_id, pool_id, nodes) return changed, result def remove_lbpool_nodes( self, alias, location, lb_id, pool_id, nodes_to_remove): """ Removes nodes from the provided pool :param alias: the account alias :param location: the datacenter the load balancer resides in :param lb_id: the id string of the load balancer :param pool_id: the id string of the pool :param nodes_to_remove: a list of dictionaries containing the nodes to remove :return: (changed, result) - changed: Boolean whether a change was made result: The result from the CLC API call """ changed = False result = {} nodes = self._get_lbpool_nodes(alias, location, lb_id, pool_id) for node in nodes_to_remove: if not node.get('status'): node['status'] = 'enabled' if node in nodes: changed = True nodes.remove(node) if changed is True and not self.module.check_mode: result = self.set_loadbalancernodes( alias, location, lb_id, pool_id, nodes) return changed, result def _get_lbpool_nodes(self, alias, location, lb_id, pool_id): """ Return the list of nodes available to the provided load balancer pool :param alias: the account alias :param location: the datacenter the load balancer resides in :param lb_id: the id string of the load balancer :param pool_id: the id string of the pool :return: result: The list of nodes """ result = None try: result = self.clc.v2.API.Call('GET', '/v2/sharedLoadBalancers/%s/%s/%s/pools/%s/nodes' % (alias, location, lb_id, pool_id)) except APIFailedResponse as e: self.module.fail_json( msg='Unable to fetch list of available nodes for load balancer pool id: {0}. {1}'.format( pool_id, str(e.response_text))) return result @staticmethod def define_argument_spec(): """ Define the argument spec for the ansible module :return: argument spec dictionary """ argument_spec = dict( name=dict(required=True), description=dict(default=None), location=dict(required=True), alias=dict(required=True), port=dict(choices=[80, 443]), method=dict(choices=['leastConnection', 'roundRobin']), persistence=dict(choices=['standard', 'sticky']), nodes=dict(type='list', default=[]), status=dict(default='enabled', choices=['enabled', 'disabled']), state=dict( default='present', choices=[ 'present', 'absent', 'port_absent', 'nodes_present', 'nodes_absent']) ) return argument_spec def _set_clc_credentials_from_env(self): """ Set the CLC Credentials on the sdk by reading environment variables :return: none """ env = os.environ v2_api_token = env.get('CLC_V2_API_TOKEN', False) v2_api_username = env.get('CLC_V2_API_USERNAME', False) v2_api_passwd = env.get('CLC_V2_API_PASSWD', False) clc_alias = env.get('CLC_ACCT_ALIAS', False) api_url = env.get('CLC_V2_API_URL', False) if api_url: self.clc.defaults.ENDPOINT_URL_V2 = api_url if v2_api_token and clc_alias: self.clc._LOGIN_TOKEN_V2 = v2_api_token self.clc._V2_ENABLED = True self.clc.ALIAS = clc_alias elif v2_api_username and v2_api_passwd: self.clc.v2.SetCredentials( api_username=v2_api_username, api_passwd=v2_api_passwd) else: return self.module.fail_json( msg="You must set the CLC_V2_API_USERNAME and CLC_V2_API_PASSWD " "environment variables") @staticmethod def _set_user_agent(clc): if hasattr(clc, 'SetRequestsSession'): agent_string = "ClcAnsibleModule/" + __version__ ses = requests.Session() ses.headers.update({"Api-Client": agent_string}) ses.headers['User-Agent'] += " " + agent_string clc.SetRequestsSession(ses) def main(): """ The main function. Instantiates the module and calls process_request. :return: none """ module = AnsibleModule(argument_spec=ClcLoadBalancer.define_argument_spec(), supports_check_mode=True) clc_loadbalancer = ClcLoadBalancer(module) clc_loadbalancer.process_request() if __name__ == '__main__': main()