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Enhancements to provide pool creation and attributes

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This commit is contained in:
Matt Hite 2013-07-31 14:12:04 -07:00
parent 8cc13590b4
commit c4a06d32a5
1 changed files with 251 additions and 49 deletions
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300
library/net_infrastructure/bigip_pool
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@ -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)