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ansible/library/net_infrastructure/bigip_monitor_tcp
Serge van Ginderachter ceb1ba1687 bigip_monitor bugfix for check mode 
Fixes case where properties are retrieved for a non existent monitor
which happens in check mode.
2014-06-06 16:48:36 +02:00

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Python
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#!/usr/bin/python
# -*- coding: utf-8 -*-
# (c) 2013, serge van Ginderachter <serge@vanginderachter.be>
#
# This file is part of Ansible
#
# Ansible is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Ansible is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
DOCUMENTATION = '''
---
module: bigip_monitor_tcp
short_description: "Manages F5 BIG-IP LTM tcp monitors"
description:
- "Manages F5 BIG-IP LTM tcp monitors via iControl SOAP API"
version_added: "1.4"
author: Serge van Ginderachter
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"
- "Monitor API documentation: https://devcentral.f5.com/wiki/iControl.LocalLB__Monitor.ashx"
requirements:
- bigsuds
options:
server:
description:
- BIG-IP host
required: true
default: null
user:
description:
- BIG-IP username
required: true
default: null
password:
description:
- BIG-IP password
required: true
default: null
state:
description:
- Monitor state
required: false
default: 'present'
choices: ['present', 'absent']
name:
description:
- Monitor name
required: true
default: null
aliases: ['monitor']
partition:
description:
- Partition for the monitor
required: false
default: 'Common'
type:
description:
- The template type of this monitor template
required: false
default: 'tcp'
choices: [ 'TTYPE_TCP', 'TTYPE_TCP_ECHO', 'TTYPE_TCP_HALF_OPEN']
parent:
description:
- The parent template of this monitor template
required: false
default: 'tcp'
choices: [ 'tcp', 'tcp_echo', 'tcp_half_open']
parent_partition:
description:
- Partition for the parent monitor
required: false
default: 'Common'
send:
description:
- The send string for the monitor call
required: true
default: none
receive:
description:
- The receive string for the monitor call
required: true
default: none
ip:
description:
- IP address part of the ipport definition. The default API setting
is "0.0.0.0".
required: false
default: none
port:
description:
- port address part op the ipport definition. Tyhe default API
setting is 0.
required: false
default: none
interval:
description:
- The interval specifying how frequently the monitor instance
of this template will run. By default, this interval is used for up and
down states. The default API setting is 5.
required: false
default: none
timeout:
description:
- The number of seconds in which the node or service must respond to
the monitor request. If the target responds within the set time
period, it is considered up. If the target does not respond within
the set time period, it is considered down. You can change this
number to any number you want, however, it should be 3 times the
interval number of seconds plus 1 second. The default API setting
is 16.
required: false
default: none
time_until_up:
description:
- Specifies the amount of time in seconds after the first successful
response before a node will be marked up. A value of 0 will cause a
node to be marked up immediately after a valid response is received
from the node. The default API setting is 0.
required: false
default: none
'''
EXAMPLES = '''
- name: BIGIP F5 | Create TCP Monitor
local_action:
module: bigip_monitor_tcp
state: present
server: "{{ f5server }}"
user: "{{ f5user }}"
password: "{{ f5password }}"
name: "{{ item.monitorname }}"
type: tcp
send: "{{ item.send }}"
receive: "{{ item.receive }}"
with_items: f5monitors-tcp
- name: BIGIP F5 | Create TCP half open Monitor
local_action:
module: bigip_monitor_tcp
state: present
server: "{{ f5server }}"
user: "{{ f5user }}"
password: "{{ f5password }}"
name: "{{ item.monitorname }}"
type: tcp
send: "{{ item.send }}"
receive: "{{ item.receive }}"
with_items: f5monitors-halftcp
- name: BIGIP F5 | Remove TCP Monitor
local_action:
module: bigip_monitor_tcp
state: absent
server: "{{ f5server }}"
user: "{{ f5user }}"
password: "{{ f5password }}"
name: "{{ monitorname }}"
with_flattened:
- f5monitors-tcp
- f5monitors-halftcp
'''
try:
import bigsuds
except ImportError:
bigsuds_found = False
else:
bigsuds_found = True
TEMPLATE_TYPE = DEFAULT_TEMPLATE_TYPE = 'TTYPE_TCP'
TEMPLATE_TYPE_CHOICES = ['tcp', 'tcp_echo', 'tcp_half_open']
DEFAULT_PARENT = DEFAULT_TEMPLATE_TYPE_CHOICE = DEFAULT_TEMPLATE_TYPE.replace('TTYPE_', '').lower()
# ===========================================
# bigip_monitor module generic methods.
# these should be re-useable for other monitor types
#
def bigip_api(bigip, user, password):
api = bigsuds.BIGIP(hostname=bigip, username=user, password=password)
return api
def check_monitor_exists(module, api, monitor, parent):
# hack to determine if monitor exists
result = False
try:
ttype = api.LocalLB.Monitor.get_template_type(template_names=[monitor])[0]
parent2 = api.LocalLB.Monitor.get_parent_template(template_names=[monitor])[0]
if ttype == TEMPLATE_TYPE and parent == parent2:
result = True
else:
module.fail_json(msg='Monitor already exists, but has a different type (%s) or parent(%s)' % (ttype, parent))
except bigsuds.OperationFailed, e:
if "was not found" in str(e):
result = False
else:
# genuine exception
raise
return result
def create_monitor(api, monitor, template_attributes):
try:
api.LocalLB.Monitor.create_template(templates=[{'template_name': monitor, 'template_type': TEMPLATE_TYPE}], template_attributes=[template_attributes])
except bigsuds.OperationFailed, e:
if "already exists" in str(e):
return False
else:
# genuine exception
raise
return True
def delete_monitor(api, monitor):
try:
api.LocalLB.Monitor.delete_template(template_names=[monitor])
except bigsuds.OperationFailed, e:
# maybe it was deleted since we checked
if "was not found" in str(e):
return False
else:
# genuine exception
raise
return True
def check_string_property(api, monitor, str_property):
try:
return str_property == api.LocalLB.Monitor.get_template_string_property([monitor], [str_property['type']])[0]
except bigsuds.OperationFailed, e:
# happens in check mode if not created yet
if "was not found" in str(e):
return True
else:
# genuine exception
raise
return True
def set_string_property(api, monitor, str_property):
api.LocalLB.Monitor.set_template_string_property(template_names=[monitor], values=[str_property])
def check_integer_property(api, monitor, int_property):
try:
return int_property == api.LocalLB.Monitor.get_template_integer_property([monitor], [int_property['type']])[0]
except bigsuds.OperationFailed, e:
# happens in check mode if not created yet
if "was not found" in str(e):
return True
else:
# genuine exception
raise
return True
def set_integer_property(api, monitor, int_property):
api.LocalLB.Monitor.set_template_int_property(template_names=[monitor], values=[int_property])
def update_monitor_properties(api, module, monitor, template_string_properties, template_integer_properties):
changed = False
for str_property in template_string_properties:
if str_property['value'] is not None and not check_string_property(api, monitor, str_property):
if not module.check_mode:
set_string_property(api, monitor, str_property)
changed = True
for int_property in template_integer_properties:
if int_property['value'] is not None and not check_integer_property(api, monitor, int_property):
if not module.check_mode:
set_integer_property(api, monitor, int_property)
changed = True
return changed
def get_ipport(api, monitor):
return api.LocalLB.Monitor.get_template_destination(template_names=[monitor])[0]
def set_ipport(api, monitor, ipport):
try:
api.LocalLB.Monitor.set_template_destination(template_names=[monitor], destinations=[ipport])
return True, ""
except bigsuds.OperationFailed, e:
if "Cannot modify the address type of monitor" in str(e):
return False, "Cannot modify the address type of monitor if already assigned to a pool."
else:
# genuine exception
raise
# ===========================================
# main loop
#
# writing a module for other monitor types should
# only need an updated main() (and monitor specific functions)
def main():
# begin monitor specific stuff
module = AnsibleModule(
argument_spec = dict(
server = dict(required=True),
user = dict(required=True),
password = dict(required=True),
partition = dict(default='Common'),
state = dict(default='present', choices=['present', 'absent']),
name = dict(required=True),
type = dict(default=DEFAULT_TEMPLATE_TYPE_CHOICE, choices=TEMPLATE_TYPE_CHOICES),
parent = dict(default=DEFAULT_PARENT),
parent_partition = dict(default='Common'),
send = dict(required=False),
receive = dict(required=False),
ip = dict(required=False),
port = dict(required=False, type='int'),
interval = dict(required=False, type='int'),
timeout = dict(required=False, type='int'),
time_until_up = dict(required=False, type='int', default=0)
),
supports_check_mode=True
)
server = module.params['server']
user = module.params['user']
password = module.params['password']
partition = module.params['partition']
parent_partition = module.params['parent_partition']
state = module.params['state']
name = module.params['name']
type = 'TTYPE_' + module.params['type'].upper()
parent = "/%s/%s" % (parent_partition, module.params['parent'])
monitor = "/%s/%s" % (partition, name)
send = module.params['send']
receive = module.params['receive']
ip = module.params['ip']
port = module.params['port']
interval = module.params['interval']
timeout = module.params['timeout']
time_until_up = module.params['time_until_up']
# tcp monitor has multiple types, so overrule
global TEMPLATE_TYPE
TEMPLATE_TYPE = type
# end monitor specific stuff
if not bigsuds_found:
module.fail_json(msg="the python bigsuds module is required")
api = bigip_api(server, user, password)
monitor_exists = check_monitor_exists(module, api, monitor, parent)
# ipport is a special setting
if monitor_exists: # make sure to not update current settings if not asked
cur_ipport = get_ipport(api, monitor)
if ip is None:
ip = cur_ipport['ipport']['address']
if port is None:
port = cur_ipport['ipport']['port']
else: # use API defaults if not defined to create it
if interval is None:
interval = 5
if timeout is None:
timeout = 16
if ip is None:
ip = '0.0.0.0'
if port is None:
port = 0
if send is None:
send = ''
if receive is None:
receive = ''
# define and set address type
if ip == '0.0.0.0' and port == 0:
address_type = 'ATYPE_STAR_ADDRESS_STAR_PORT'
elif ip == '0.0.0.0' and port != 0:
address_type = 'ATYPE_STAR_ADDRESS_EXPLICIT_PORT'
elif ip != '0.0.0.0' and port != 0:
address_type = 'ATYPE_EXPLICIT_ADDRESS_EXPLICIT_PORT'
else:
address_type = 'ATYPE_UNSET'
ipport = {'address_type': address_type,
'ipport': {'address': ip,
'port': port}}
template_attributes = {'parent_template': parent,
'interval': interval,
'timeout': timeout,
'dest_ipport': ipport,
'is_read_only': False,
'is_directly_usable': True}
# monitor specific stuff
if type == 'TTYPE_TCP':
template_string_properties = [{'type': 'STYPE_SEND',
'value': send},
{'type': 'STYPE_RECEIVE',
'value': receive}]
else:
template_string_properties = []
template_integer_properties = [{'type': 'ITYPE_INTERVAL',
'value': interval},
{'type': 'ITYPE_TIMEOUT',
'value': timeout},
{'type': 'ITYPE_TIME_UNTIL_UP',
'value': interval}]
# main logic, monitor generic
try:
result = {'changed': False} # default
if state == 'absent':
if monitor_exists:
if not module.check_mode:
# possible race condition if same task
# on other node deleted it first
result['changed'] |= delete_monitor(api, monitor)
else:
result['changed'] |= True
else: # state present
## check for monitor itself
if not monitor_exists: # create it
if not module.check_mode:
# again, check changed status here b/c race conditions
# if other task already created it
result['changed'] |= create_monitor(api, monitor, template_attributes)
else:
result['changed'] |= True
## check for monitor parameters
# whether it already existed, or was just created, now update
# the update functions need to check for check mode but
# cannot update settings if it doesn't exist which happens in check mode
if monitor_exists and not module.check_mode:
result['changed'] |= update_monitor_properties(api, module, monitor,
template_string_properties,
template_integer_properties)
# else assume nothing changed
# we just have to update the ipport if monitor already exists and it's different
if monitor_exists and cur_ipport != ipport:
set_ipport(api, monitor, ipport)
result['changed'] |= True
#else: monitor doesn't exist (check mode) or ipport is already ok
except Exception, e:
module.fail_json(msg="received exception: %s" % e)
module.exit_json(**result)
# import module snippets
from ansible.module_utils.basic import *
main()
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