From c4a06d32a52fcba5a123319f728fe990aa4f2291 Mon Sep 17 00:00:00 2001 From: Matt Hite Date: Wed, 31 Jul 2013 14:12:04 -0700 Subject: [PATCH] Enhancements to provide pool creation and attributes --- library/net_infrastructure/bigip_pool | 300 +++++++++++++++++++++----- 1 file changed, 251 insertions(+), 49 deletions(-) diff --git a/library/net_infrastructure/bigip_pool b/library/net_infrastructure/bigip_pool index 06e67f55f8..dc64894882 100644 --- a/library/net_infrastructure/bigip_pool +++ b/library/net_infrastructure/bigip_pool @@ -21,72 +21,122 @@ DOCUMENTATION = ''' --- module: bigip_pool -short_description: "Manages F5 BIG-IP LTM pool members" +short_description: "Manages F5 BIG-IP LTM pools" description: - - "Manages F5 BIG-IP LTM pool members via iControl SOAP API" + - "Manages F5 BIG-IP LTM pools via iControl SOAP API" version_added: "1.2" author: Matt Hite notes: - "Requires BIG-IP software version >= 11" - "F5 developed module 'bigsuds' required (see http://devcentral.f5.com)" - "Best run as a local_action in your playbook" - - "If pool member IP address is no longer referenced by another pool when running with state=absent, the node IP will also be deleted from the F5 configuration." requirements: - bigsuds options: server: description: - - "BIG-IP host" + - BIG-IP host required: true default: null choices: [] aliases: [] user: description: - - "BIG-IP username" + - BIG-IP username required: true default: null choices: [] aliases: [] password: description: - - "BIG-IP password" + - BIG-IP password required: true default: null choices: [] aliases: [] state: description: - - "Pool member state" + - Pool state required: false default: present choices: ['present', 'absent'] aliases: [] name: description: - - "BIG-IP pool name" + - Pool name required: true default: null choices: [] aliases: ['pool'] partition: description: - - "BIG-IP partition" + - Partition required: false default: 'Common' choices: [] aliases: [] - host: + lb_method: description: - - "BIG-IP pool member" - required: true + - Load balancing method + required: False + default: 'round_robin' + choices: ['round_robin', 'ratio_member', 'least_connection_member', + 'observed_member', 'predictive_member', 'ratio_node_address', + 'least_connection_node_address', 'fastest_node_address', + 'observed_node_address', 'predictive_node_address', + 'dynamic_ratio', 'fastest_app_response', 'least_sessions', + 'dynamic_ratio_member', 'l3_addr', 'unknown', + 'weighted_least_connection_member', + 'weighted_least_connection_node_address', + 'ratio_session', 'ratio_least_connection_member', + 'ratio_least_connection_node_address'] + aliases: [] + monitor_type: + description: + - Monitor rule type when monitors > 1 + required: False + default: null + choices: ['and_list', 'm_of_n'] + aliases: [] + quorum: + description: + - Monitor quorum value when monitor_type is m_of_n + required: False default: null choices: [] aliases: [] + monitors: + description: + - Monitor template name list + required: False + default: null + choices: [] + aliases: [] + slow_ramp_time: + description: + - Sets the ramp-up time (in seconds) to gradually ramp up the load on newly added or freshly detected UP pool members + required: False + default: null + choices: [] + aliases: [] + service_down_action: + description: + - Sets the action to take when node goes down in pool + required: False + default: null + choices: ['none', 'reset', 'drop', 'reselect'] + aliases: [] + host: + description: + - "Pool member IP" + required: False + default: null + choices: [] + aliases: ['address'] port: description: - - "BIG-IP pool member port" - required: true + - "Pool member port" + required: False default: null choices: [] aliases: [] @@ -98,10 +148,16 @@ EXAMPLES = ''' ## ad-hoc ansible CLI example -# ensures 1.1.1.1:80 is present in pool /matthite/matthite-pool on load balancer lb.mydomain.com +# Create (or update) pool /matthite/matthite-pool on load balancer lb.mydomain.com +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" + +# Remove pool /matthite/matthite-pool on load balancer lb.mydomain.com +ansible -c local localhost -m bigip_pool -a "server=lb.mydomain.com user=admin password=mysecret state=absent name=matthite-pool partition=matthite" + +# Add pool member /matthite/1.1.1.1:80 to pool /matthite/matthite-pool on load balancer lb.mydomain.com 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" -# ensures 1.1.1.1:80 is absent from pool /matthite/matthite-pool on load balancer lb.mydomain.com +# Remove pool member /matthite/1.1.1.1:80 to pool /matthite/matthite-pool on load balancer lb.mydomain.com 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" ## playbook task example: @@ -110,8 +166,8 @@ ansible -c local localhost -m bigip_pool -a "server=lb.mydomain.com user=admin p # file bigip-test.yml # ... tasks: - - name: Register current node to load balancer pool - local_action: bigip_pool server=lb.mydomain.com user=admin password=mysecret state=present name=matthite-pool partition=matthite host={{ ansible_default_ipv4.address }} port=80 + - name: Create /matthite/matthite-pool + 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 ''' try: @@ -143,6 +199,52 @@ def pool_exists(api, pool): raise return result +def create_pool(api, pool, lb_method): + lb_method = "LB_METHOD_%s" % lb_method.strip().upper() + api.LocalLB.Pool.create_v2(pool_names=[pool], lb_methods=[lb_method], + members=[[]]) + +def remove_pool(api, pool): + api.LocalLB.Pool.delete_pool(pool_names=[pool]) + +def get_lb_method(api, pool): + lb_method = api.LocalLB.Pool.get_lb_method(pool_names=[pool])[0] + lb_method = lb_method.strip().replace('LB_METHOD_', '').lower() + return lb_method + +def set_lb_method(api, pool, lb_method): + lb_method = "LB_METHOD_%s" % lb_method.strip().upper() + api.LocalLB.Pool.set_lb_method(pool_names=[pool], lb_methods=[lb_method]) + +def get_monitors(api, pool): + result = api.LocalLB.Pool.get_monitor_association(pool_names=[pool])[0]['monitor_rule'] + monitor_type = result['type'].split("MONITOR_RULE_TYPE_")[-1].lower() + quorum = result['quorum'] + monitor_templates = result['monitor_templates'] + return (monitor_type, quorum, monitor_templates) + +def set_monitors(api, pool, monitor_type, quorum, monitor_templates): + monitor_type = "MONITOR_RULE_TYPE_%s" % monitor_type.strip().upper() + monitor_rule = {'type': monitor_type, 'quorum': quorum, 'monitor_templates': monitor_templates} + monitor_association = {'pool_name': pool, 'monitor_rule': monitor_rule} + api.LocalLB.Pool.set_monitor_association(monitor_associations=[monitor_association]) + +def get_slow_ramp_time(api, pool): + result = api.LocalLB.Pool.get_slow_ramp_time(pool_names=[pool])[0] + return result + +def set_slow_ramp_time(api, pool, seconds): + api.LocalLB.Pool.set_slow_ramp_time(pool_names=[pool], values=[seconds]) + +def get_action_on_service_down(api, pool): + result = api.LocalLB.Pool.get_action_on_service_down(pool_names=[pool])[0] + result = result.split("SERVICE_DOWN_ACTION_")[-1].lower() + return result + +def set_action_on_service_down(api, pool, action): + action = "SERVICE_DOWN_ACTION_%s" % action.strip().upper() + api.LocalLB.Pool.set_action_on_service_down(pool_names=[pool], actions=[action]) + def member_exists(api, pool, address, port): # hack to determine if member exists result = False @@ -175,24 +277,45 @@ def delete_node_address(api, address): def remove_pool_member(api, pool, address, port): members = [{'address': address, 'port': port}] api.LocalLB.Pool.remove_member_v2(pool_names=[pool], members=[members]) - return True def add_pool_member(api, pool, address, port): members = [{'address': address, 'port': port}] api.LocalLB.Pool.add_member_v2(pool_names=[pool], members=[members]) - return True def main(): + lb_method_choices = ['round_robin', 'ratio_member', + 'least_connection_member', 'observed_member', + 'predictive_member', 'ratio_node_address', + 'least_connection_node_address', + 'fastest_node_address', 'observed_node_address', + 'predictive_node_address', 'dynamic_ratio', + 'fastest_app_response', 'least_sessions', + 'dynamic_ratio_member', 'l3_addr', 'unknown', + 'weighted_least_connection_member', + 'weighted_least_connection_node_address', + 'ratio_session', 'ratio_least_connection_member', + 'ratio_least_connection_node_address'] + + monitor_type_choices = ['and_list', 'm_of_n'] + + service_down_choices = ['none', 'reset', 'drop', 'reselect'] + module = AnsibleModule( argument_spec = dict( - server = dict(required=True), - user = dict(required=True), - password = dict(required=True), - state = dict(default='present', choices=['present', 'absent']), - name = dict(required=True, aliases=['pool']), - partition = dict(default='Common'), - host = dict(required=True), - port = dict(required=True) + server = dict(type='str', required=True), + user = dict(type='str', required=True), + password = dict(type='str', required=True), + state = dict(type='str', default='present', choices=['present', 'absent']), + name = dict(type='str', required=True, aliases=['pool']), + partition = dict(type='str', default='Common'), + lb_method = dict(type='str', choices=lb_method_choices), + monitor_type = dict(type='str', choices=monitor_type_choices), + quorum = dict(type='int'), + monitors = dict(type='list'), + slow_ramp_time = dict(type='int'), + service_down_action = dict(type='str', choices=service_down_choices), + host = dict(type='str', aliases=['address']), + port = dict(type='int') ), supports_check_mode=True ) @@ -206,34 +329,113 @@ def main(): state = module.params['state'] name = module.params['name'] partition = module.params['partition'] - host = module.params['host'] - port = module.params['port'] - address = "/%s/%s" % (partition, host) pool = "/%s/%s" % (partition, name) + lb_method = module.params['lb_method'] + if lb_method: + lb_method = lb_method.lower() + monitor_type = module.params['monitor_type'] + if monitor_type: + monitor_type = monitor_type.lower() + quorum = module.params['quorum'] + monitors = module.params['monitors'] + slow_ramp_time = module.params['slow_ramp_time'] + service_down_action = module.params['service_down_action'] + if service_down_action: + service_down_action = service_down_action.lower() + host = module.params['host'] + address = "/%s/%s" % (partition, host) + port = module.params['port'] + + # sanity check user supplied values + + if (host and not port) or (port and not host): + module.fail_json(msg="both host and port must be supplied") + + if 1 > port > 65535: + module.fail_json(msg="valid ports must be in range 1 - 65535") + + if monitors: + if len(monitors) == 1: + # set default required values for single monitor + quorum = 0 + monitor_type = 'single' + elif len(monitors) > 1: + if not monitor_type: + module.fail_json(msg="monitor_type required for monitors > 1") + if monitor_type == 'm_of_n' and not quorum: + module.fail_json(msg="quorum value required for monitor_type m_of_n") + if monitor_type != 'm_of_n': + quorum = 0 + elif monitor_type: + # no monitors specified but monitor_type exists + module.fail_json(msg="monitor_type require monitors parameter") + elif quorum is not None: + # no monitors specified but quorum exists + module.fail_json(msg="quorum requires monitors parameter") try: api = bigip_api(server, user, password) - if not pool_exists(api, pool): - module.fail_json(msg="non-existent pool: %s" % pool) + result = {'changed': False} # default + if state == 'absent': - if member_exists(api, pool, address, port): - if module.check_mode: - result = {'changed': True} - else: - changed = remove_pool_member(api, pool, address, port) - deleted = delete_node_address(api, address) - result = {'changed': changed, 'deleted': deleted} - else: - result = {'changed': False} + if host and port and pool: + # member removal takes precedent + if pool_exists(api, pool) and member_exists(api, pool, address, port): + if not module.check_mode: + remove_pool_member(api, pool, address, port) + deleted = delete_node_address(api, address) + result = {'changed': True, 'deleted': deleted} + else: + result = {'changed': True} + elif pool_exists(api, pool): + # no host/port supplied, must be pool removal + if not module.check_mode: + remove_pool(api, pool) + result = {'changed': True} + elif state == 'present': - if not member_exists(api, pool, address, port): - if module.check_mode: - result = {'changed': True} - else: - changed = add_pool_member(api, pool, address, port) - result = {'changed': changed} + if not pool_exists(api, pool): + # pool does not exist -- need to create it + if not module.check_mode: + # create requires lb_method but we don't want to default + # to a value on subsequent runs + if not lb_method: + lb_method = 'round_robin' + create_pool(api, pool, lb_method) + if monitors: + set_monitors(api, pool, monitor_type, quorum, monitors) + if slow_ramp_time: + set_slow_ramp_time(api, pool, slow_ramp_time) + if service_down_action: + set_action_on_service_down(api, pool, service_down_action) + if host and port: + add_pool_member(api, pool, address, port) + result = {'changed': True} else: - result = {'changed': False} + # pool exists -- potentially modify attributes + if lb_method and lb_method != get_lb_method(api, pool): + if not module.check_mode: + set_lb_method(api, pool, lb_method) + result = {'changed': True} + if monitors: + t_monitor_type, t_quorum, t_monitor_templates = get_monitors(api, pool) + if (t_monitor_type != monitor_type) or (t_quorum != quorum) or (set(t_monitor_templates) != set(monitors)): + if not module.check_mode: + set_monitors(api, pool, monitor_type, quorum, monitors) + result = {'changed': True} + if slow_ramp_time and slow_ramp_time != get_slow_ramp_time(api, pool): + if not module.check_mode: + set_slow_ramp_time(api, pool, slow_ramp_time) + result = {'changed': True} + if service_down_action and service_down_action != get_action_on_service_down(api, pool): + if not module.check_mode: + set_action_on_service_down(api, pool, service_down_action) + result = {'changed': True} + if (host and port) and not member_exists(api, pool, address, port): + if not module.check_mode: + add_pool_member(api, pool, address, port) + result = {'changed': True} + except Exception, e: module.fail_json(msg="received exception: %s" % e)