Adds the bigip_gtm_pool module (#25275)

This module is used to manage GTM(DNS) pools in a BIG-IP. Unit tests are provided. Integration tests can be found here https://github.com/F5Networks/f5-ansible/blob/devel/test/integration/bigip_gtm_pool.yaml#L23 https://github.com/F5Networks/f5-ansible/tree/devel/test/integration/targets/bigip_gtm_pool/tasks
8 years ago · 0133a5a763
parent 1476e30c26
commit 0133a5a763
4 changed files with 1056 additions and 0 deletions
--- a/lib/ansible/modules/network/f5/bigip_gtm_pool.py
+++ b/lib/ansible/modules/network/f5/bigip_gtm_pool.py
@ -0,0 +1,653 @@
+#!/usr/bin/python
+# -*- coding: utf-8 -*-
+#
+# Copyright 2017 F5 Networks Inc.
+#
+# 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/>.
+
+ANSIBLE_METADATA = {
+    'status': ['preview'],
+    'supported_by': 'community',
+    'metadata_version': '1.0'
+}
+
+DOCUMENTATION = '''
+---
+module: bigip_gtm_pool
+short_description: Manages F5 BIG-IP GTM pools.
+description:
+    - Manages F5 BIG-IP GTM pools.
+version_added: "2.4"
+options:
+  state:
+    description:
+        - Pool member state. When C(present), ensures that the pool is
+          created and enabled. When C(absent), ensures that the pool is
+          removed from the system. When C(enabled) or C(disabled), ensures
+          that the pool is enabled or disabled (respectively) on the remote
+          device.
+    required: True
+    choices:
+      - present
+      - absent
+      - enabled
+      - disabled
+  preferred_lb_method:
+    description:
+      - The load balancing mode that the system tries first.
+    choices:
+      - round-robin
+      - return-to-dns
+      - ratio
+      - topology
+      - static-persistence
+      - global-availability
+      - virtual-server-capacity
+      - least-connections
+      - lowest-round-trip-time
+      - fewest-hops
+      - packet-rate
+      - cpu
+      - completion-rate
+      - quality-of-service
+      - kilobytes-per-second
+      - drop-packet
+      - fallback-ip
+      - virtual-server-score
+  alternate_lb_method:
+    description:
+      - The load balancing mode that the system tries if the
+        C(preferred_lb_method) is unsuccessful in picking a pool.
+    choices:
+      - round-robin
+      - return-to-dns
+      - none
+      - ratio
+      - topology
+      - static-persistence
+      - global-availability
+      - virtual-server-capacity
+      - packet-rate
+      - drop-packet
+      - fallback-ip
+      - virtual-server-score
+  fallback_lb_method:
+    description:
+      - The load balancing mode that the system tries if both the
+        C(preferred_lb_method) and C(alternate_lb_method)s are unsuccessful
+        in picking a pool.
+    choices:
+      - round-robin
+      - return-to-dns
+      - ratio
+      - topology
+      - static-persistence
+      - global-availability
+      - virtual-server-capacity
+      - least-connections
+      - lowest-round-trip-time
+      - fewest-hops
+      - packet-rate
+      - cpu
+      - completion-rate
+      - quality-of-service
+      - kilobytes-per-second
+      - drop-packet
+      - fallback-ip
+      - virtual-server-score
+  fallback_ip:
+    description:
+      - Specifies the IPv4, or IPv6 address of the server to which the system
+        directs requests when it cannot use one of its pools to do so.
+        Note that the system uses the fallback IP only if you select the
+        C(fallback_ip) load balancing method.
+  type:
+    description:
+      - The type of GTM pool that you want to create. On BIG-IP releases
+        prior to version 12, this parameter is not required. On later versions
+        of BIG-IP, this is a required parameter.
+    choices:
+      - a
+      - aaaa
+      - cname
+      - mx
+      - naptr
+      - srv
+  name:
+    description:
+      - Name of the GTM pool.
+    required: True
+notes:
+  - Requires the f5-sdk Python package on the host. This is as easy as
+    pip install f5-sdk.
+  - Requires the netaddr Python package on the host. This is as easy as
+    pip install netaddr.
+extends_documentation_fragment: f5
+requirements:
+  - f5-sdk
+  - netaddr
+author:
+  - Tim Rupp (@caphrim007)
+'''
+
+RETURN = '''
+preferred_lb_method:
+    description: New preferred load balancing method for the pool.
+    returned: changed
+    type: string
+    sample: "topology"
+alternate_lb_method:
+    description: New alternate load balancing method for the pool.
+    returned: changed
+    type: string
+    sample: "drop-packet"
+fallback_lb_method:
+    description: New fallback load balancing method for the pool.
+    returned: changed
+    type: string
+    sample: "fewest-hops"
+fallback_ip:
+    description: New fallback IP used when load balacing using the C(fallback_ip) method.
+    returned: changed
+    type: string
+    sample: "10.10.10.10"
+'''
+
+EXAMPLES = '''
+- name: Create a GTM pool
+  bigip_gtm_pool:
+      server: "lb.mydomain.com"
+      user: "admin"
+      password: "secret"
+      name: "my_pool"
+  delegate_to: localhost
+
+- name: Disable pool
+  bigip_gtm_pool:
+      server: "lb.mydomain.com"
+      user: "admin"
+      password: "secret"
+      state: "disabled"
+      name: "my_pool"
+  delegate_to: localhost
+'''
+
+
+from distutils.version import LooseVersion
+from ansible.module_utils.f5_utils import (
+    AnsibleF5Client,
+    AnsibleF5Parameters,
+    HAS_F5SDK,
+    F5ModuleError,
+    iControlUnexpectedHTTPError
+)
+
+try:
+    from netaddr import IPAddress, AddrFormatError
+    HAS_NETADDR = True
+except ImportError:
+    HAS_NETADDR = False
+
+import copy
+
+
+class Parameters(AnsibleF5Parameters):
+    api_map = {
+        'loadBalancingMode': 'preferred_lb_method',
+        'alternateMode': 'alternate_lb_method',
+        'fallbackMode': 'fallback_lb_method',
+        'verifyMemberAvailability': 'verify_member_availability',
+        'fallbackIpv4': 'fallback_ip',
+        'fallbackIpv6': 'fallback_ip',
+        'fallbackIp': 'fallback_ip'
+    }
+    updatables = [
+        'preferred_lb_method', 'alternate_lb_method', 'fallback_lb_method',
+        'fallback_ip'
+    ]
+    returnables = [
+        'preferred_lb_method', 'alternate_lb_method', 'fallback_lb_method',
+        'fallback_ip'
+    ]
+    api_attributes = [
+        'loadBalancingMode', 'alternateMode', 'fallbackMode', 'verifyMemberAvailability',
+        'fallbackIpv4', 'fallbackIpv6', 'fallbackIp'
+    ]
+
+    def to_return(self):
+        result = {}
+        for returnable in self.returnables:
+            result[returnable] = getattr(self, returnable)
+        result = self._filter_params(result)
+        return result
+
+    def api_params(self):
+        result = {}
+        for api_attribute in self.api_attributes:
+            if self.api_map is not None and api_attribute in self.api_map:
+                result[api_attribute] = getattr(self, self.api_map[api_attribute])
+            else:
+                result[api_attribute] = getattr(self, api_attribute)
+        result = self._filter_params(result)
+        return result
+
+    @property
+    def collection(self):
+        type_map = dict(
+            a='a_s',
+            aaaa='aaaas',
+            cname='cnames',
+            mx='mxs',
+            naptr='naptrs',
+            srv='srvs'
+        )
+        if self._values['type'] is None:
+            return None
+        wideip_type = self._values['type']
+        return type_map[wideip_type]
+
+    @property
+    def type(self):
+        if self._values['type'] is None:
+            return None
+        return str(self._values['type'])
+
+    @property
+    def verify_member_availability(self):
+        if self._values['verify_member_availability'] is None:
+            return None
+        elif self._values['verify_member_availability']:
+            return 'enabled'
+        else:
+            return 'disabled'
+
+    @property
+    def fallback_ip(self):
+        if self._values['fallback_ip'] is None:
+            return None
+        if self._values['fallback_ip'] == 'any':
+            return 'any'
+        try:
+            address = IPAddress(self._values['fallback_ip'])
+            if address.version == 4:
+                return str(address.ip)
+            elif address.version == 6:
+                return str(address.ip)
+            return None
+        except AddrFormatError:
+            raise F5ModuleError(
+                'The provided fallback address is not a valid IPv4 address'
+            )
+
+    @property
+    def state(self):
+        if self._values['state'] == 'enabled':
+            return 'present'
+        return self._values['state']
+
+    @property
+    def enabled(self):
+        if self._values['state'] == 'disabled':
+            return False
+        elif self._values['state'] in ['present', 'enabled']:
+            return True
+        elif self._values['enabled'] is True:
+            return True
+        else:
+            return None
+
+    @property
+    def disabled(self):
+        if self._values['state'] == 'disabled':
+            return True
+        elif self._values['state'] in ['present', 'enabled']:
+            return False
+        elif self._values['disabled'] is True:
+            return True
+        else:
+            return None
+
+
+class ModuleManager(object):
+    def __init__(self, client):
+        self.client = client
+
+    def exec_module(self):
+        if not self.gtm_provisioned():
+            raise F5ModuleError(
+                "GTM must be provisioned to use this module."
+            )
+        if self.version_is_less_than_12():
+            manager = self.get_manager('untyped')
+        else:
+            manager = self.get_manager('typed')
+        return manager.exec_module()
+
+    def get_manager(self, type):
+        if type == 'typed':
+            return TypedManager(self.client)
+        elif type == 'untyped':
+            return UntypedManager(self.client)
+
+    def version_is_less_than_12(self):
+        version = self.client.api.tmos_version
+        if LooseVersion(version) < LooseVersion('12.0.0'):
+            return True
+        else:
+            return False
+
+    def gtm_provisioned(self):
+        resource = self.client.api.tm.sys.dbs.db.load(
+            name='provisioned.cpu.gtm'
+        )
+        if int(resource.value) == 0:
+            return False
+        return True
+
+
+class BaseManager(object):
+    def __init__(self, client):
+        self.client = client
+        self.have = None
+        self.want = Parameters(self.client.module.params)
+        self.changes = Parameters()
+
+    def _set_changed_options(self):
+        changed = {}
+        for key in Parameters.returnables:
+            if getattr(self.want, key) is not None:
+                changed[key] = getattr(self.want, key)
+        if changed:
+            self.changes = Parameters(changed)
+
+    def _update_changed_options(self):
+        changed = {}
+        for key in Parameters.updatables:
+            if getattr(self.want, key) is not None:
+                attr1 = getattr(self.want, key)
+                attr2 = getattr(self.have, key)
+                if attr1 != attr2:
+                    changed[key] = attr1
+
+        if self.want.state == 'disabled' and self.have.enabled:
+            changed['state'] = self.want.state
+        elif self.want.state in ['present', 'enabled'] and self.have.disabled:
+            changed['state'] = self.want.state
+
+        if changed:
+            self.changes = Parameters(changed)
+            return True
+        return False
+
+    def exec_module(self):
+        changed = False
+        result = dict()
+        state = self.want.state
+
+        try:
+            if state in ["present", "disabled"]:
+                changed = self.present()
+            elif state == "absent":
+                changed = self.absent()
+        except iControlUnexpectedHTTPError as e:
+            raise F5ModuleError(str(e))
+
+        changes = self.changes.to_return()
+        result.update(**changes)
+        result.update(dict(changed=changed))
+        return result
+
+    def present(self):
+        if self.exists():
+            return self.update()
+        else:
+            return self.create()
+
+    def absent(self):
+        if self.exists():
+            return self.remove()
+        return False
+
+    def should_update(self):
+        result = self._update_changed_options()
+        if result:
+            return True
+        return False
+
+    def update(self):
+        self.have = self.read_current_from_device()
+        if not self.should_update():
+            return False
+        if self.client.check_mode:
+            return True
+        self.update_on_device()
+        return True
+
+    def create(self):
+        self._set_changed_options()
+        if self.client.check_mode:
+            return True
+        self.create_on_device()
+        if self.exists():
+            return True
+        else:
+            raise F5ModuleError("Failed to create the GTM pool")
+
+    def remove(self):
+        if self.client.check_mode:
+            return True
+        self.remove_from_device()
+        if self.exists():
+            raise F5ModuleError("Failed to delete the GTM pool")
+        return True
+
+
+class TypedManager(BaseManager):
+    def __init__(self, client):
+        super(TypedManager, self).__init__(client)
+        if self.want.type is None:
+            raise F5ModuleError(
+                "The 'type' option is required for BIG-IP instances "
+                "greater than or equal to 12.x"
+            )
+
+    def present(self):
+        types = [
+            'a', 'aaaa', 'cname', 'mx', 'naptr', 'srv'
+        ]
+        if self.want.type is None:
+            raise F5ModuleError(
+                "A pool 'type' must be specified"
+            )
+        elif self.want.type not in types:
+            raise F5ModuleError(
+                "The specified pool type is invalid"
+            )
+
+        return super(TypedManager, self).present()
+
+    def exists(self):
+        pools = self.client.api.tm.gtm.pools
+        collection = getattr(pools, self.want.collection)
+        resource = getattr(collection, self.want.type)
+        result = resource.exists(
+            name=self.want.name,
+            partition=self.want.partition
+        )
+        return result
+
+    def update_on_device(self):
+        params = self.want.api_params()
+        pools = self.client.api.tm.gtm.pools
+        collection = getattr(pools, self.want.collection)
+        resource = getattr(collection, self.want.type)
+        result = resource.load(
+            name=self.want.name,
+            partition=self.want.partition
+        )
+        result.modify(**params)
+
+    def read_current_from_device(self):
+        pools = self.client.api.tm.gtm.pools
+        collection = getattr(pools, self.want.collection)
+        resource = getattr(collection, self.want.type)
+        result = resource.load(
+            name=self.want.name,
+            partition=self.want.partition
+        )
+        result = result.attrs
+        return Parameters(result)
+
+    def create_on_device(self):
+        params = self.want.api_params()
+        pools = self.client.api.tm.gtm.pools
+        collection = getattr(pools, self.want.collection)
+        resource = getattr(collection, self.want.type)
+        resource.create(
+            name=self.want.name,
+            partition=self.want.partition,
+            **params
+        )
+
+    def remove_from_device(self):
+        pools = self.client.api.tm.gtm.pools
+        collection = getattr(pools, self.want.collection)
+        resource = getattr(collection, self.want.type)
+        resource = resource.load(
+            name=self.want.name,
+            partition=self.want.partition
+        )
+        if resource:
+            resource.delete()
+
+
+class UntypedManager(BaseManager):
+    def exists(self):
+        result = self.client.api.tm.gtm.pools.pool.exists(
+            name=self.want.name,
+            partition=self.want.partition
+        )
+        return result
+
+    def update_on_device(self):
+        params = self.want.api_params()
+        resource = self.client.api.tm.gtm.pools.pool.load(
+            name=self.want.name,
+            partition=self.want.partition
+        )
+        resource.modify(**params)
+
+    def read_current_from_device(self):
+        resource = self.client.api.tm.gtm.pools.pool.load(
+            name=self.want.name,
+            partition=self.want.partition
+        )
+        result = resource.attrs
+        return Parameters(result)
+
+    def create_on_device(self):
+        params = self.want.api_params()
+        self.client.api.tm.gtm.pools.pool.create(
+            name=self.want.name,
+            partition=self.want.partition,
+            **params
+        )
+
+    def remove_from_device(self):
+        resource = self.client.api.tm.gtm.pools.pool.load(
+            name=self.want.name,
+            partition=self.want.partition
+        )
+        resource.delete()
+
+
+class ArgumentSpec(object):
+    def __init__(self):
+        self.states = ['absent', 'present', 'enabled', 'disabled']
+        self.preferred_lb_methods = [
+            'round-robin', 'return-to-dns', 'ratio', 'topology',
+            'static-persistence', 'global-availability',
+            'virtual-server-capacity', 'least-connections',
+            'lowest-round-trip-time', 'fewest-hops', 'packet-rate', 'cpu',
+            'completion-rate', 'quality-of-service', 'kilobytes-per-second',
+            'drop-packet', 'fallback-ip', 'virtual-server-score'
+        ]
+        self.alternate_lb_methods = [
+            'round-robin', 'return-to-dns', 'none', 'ratio', 'topology',
+            'static-persistence', 'global-availability',
+            'virtual-server-capacity', 'packet-rate', 'drop-packet',
+            'fallback-ip', 'virtual-server-score'
+        ]
+        self.fallback_lb_methods = copy.copy(self.preferred_lb_methods)
+        self.fallback_lb_methods.append('none')
+        self.types = [
+            'a', 'aaaa', 'cname', 'mx', 'naptr', 'srv'
+        ]
+        self.supports_check_mode = True
+        self.argument_spec = dict(
+            name=dict(required=True),
+            state=dict(
+                default='present',
+                choices=self.states,
+            ),
+            preferred_lb_method=dict(
+                choices=self.preferred_lb_methods,
+            ),
+            fallback_lb_method=dict(
+                choices=self.fallback_lb_methods,
+            ),
+            alternate_lb_method=dict(
+                choices=self.alternate_lb_methods,
+            ),
+            fallback_ip=dict(),
+            type=dict(
+                choices=self.types
+            )
+        )
+        self.required_if = [
+            ['preferred_lb_method', 'fallback-ip', ['fallback_ip']],
+            ['fallback_lb_method', 'fallback-ip', ['fallback_ip']],
+            ['alternate_lb_method', 'fallback-ip', ['fallback_ip']]
+        ]
+        self.f5_product_name = 'bigip'
+
+
+def main():
+    if not HAS_F5SDK:
+        raise F5ModuleError("The python f5-sdk module is required")
+
+    if not HAS_NETADDR:
+        raise F5ModuleError("The python netaddr module is required")
+
+    spec = ArgumentSpec()
+
+    client = AnsibleF5Client(
+        argument_spec=spec.argument_spec,
+        supports_check_mode=spec.supports_check_mode,
+        f5_product_name=spec.f5_product_name,
+        required_if=spec.required_if
+    )
+
+    try:
+        mm = ModuleManager(client)
+        results = mm.exec_module()
+        client.module.exit_json(**results)
+    except F5ModuleError as e:
+        client.module.fail_json(msg=str(e))
+
+
+if __name__ == '__main__':
+    main()
--- a/test/units/modules/network/f5/fixtures/load_gtm_pool_a_default.json
+++ b/test/units/modules/network/f5/fixtures/load_gtm_pool_a_default.json
@ -0,0 +1,38 @@
+{
+  "kind": "tm:gtm:pool:a:astate",
+  "name": "asdf",
+  "partition": "Common",
+  "fullPath": "/Common/asdf",
+  "generation": 94,
+  "selfLink": "https://localhost/mgmt/tm/gtm/pool/a/~Common~asdf?ver=12.1.2",
+  "alternateMode": "round-robin",
+  "dynamicRatio": "disabled",
+  "enabled": true,
+  "fallbackIp": "any",
+  "fallbackMode": "return-to-dns",
+  "limitMaxBps": 0,
+  "limitMaxBpsStatus": "disabled",
+  "limitMaxConnections": 0,
+  "limitMaxConnectionsStatus": "disabled",
+  "limitMaxPps": 0,
+  "limitMaxPpsStatus": "disabled",
+  "loadBalancingMode": "round-robin",
+  "manualResume": "disabled",
+  "maxAnswersReturned": 1,
+  "monitor": "default",
+  "qosHitRatio": 5,
+  "qosHops": 0,
+  "qosKilobytesSecond": 3,
+  "qosLcs": 30,
+  "qosPacketRate": 1,
+  "qosRtt": 50,
+  "qosTopology": 0,
+  "qosVsCapacity": 0,
+  "qosVsScore": 0,
+  "ttl": 30,
+  "verifyMemberAvailability": "enabled",
+  "membersReference": {
+    "link": "https://localhost/mgmt/tm/gtm/pool/a/~Common~asdf/members?ver=12.1.2",
+    "isSubcollection": true
+  }
+}
--- a/test/units/modules/network/f5/fixtures/load_gtm_pool_untyped_default.json
+++ b/test/units/modules/network/f5/fixtures/load_gtm_pool_untyped_default.json
@ -0,0 +1,39 @@
+{
+  "kind": "tm:gtm:pool:poolstate",
+  "name": "asdf",
+  "partition": "Common",
+  "fullPath": "/Common/asdf",
+  "generation": 92,
+  "selfLink": "https://localhost/mgmt/tm/gtm/pool/~Common~asdf?ver=11.6.1",
+  "alternateMode": "round-robin",
+  "dynamicRatio": "disabled",
+  "enabled": true,
+  "fallbackIpv4": "any",
+  "fallbackIpv6": "any6",
+  "fallbackMode": "return-to-dns",
+  "limitMaxBps": 0,
+  "limitMaxBpsStatus": "disabled",
+  "limitMaxConnections": 0,
+  "limitMaxConnectionsStatus": "disabled",
+  "limitMaxPps": 0,
+  "limitMaxPpsStatus": "disabled",
+  "loadBalancingMode": "round-robin",
+  "manualResume": "disabled",
+  "maxAddressReturned": 1,
+  "monitor": "default",
+  "qosHitRatio": 5,
+  "qosHops": 0,
+  "qosKilobytesSecond": 3,
+  "qosLcs": 30,
+  "qosPacketRate": 1,
+  "qosRtt": 50,
+  "qosTopology": 0,
+  "qosVsCapacity": 0,
+  "qosVsScore": 0,
+  "ttl": 30,
+  "verifyMemberAvailability": "enabled",
+  "membersReference": {
+    "link": "https://localhost/mgmt/tm/gtm/pool/~Common~asdf/members?ver=11.6.1",
+    "isSubcollection": true
+  }
+}
--- a/test/units/modules/network/f5/test_bigip_gtm_pool.py
+++ b/test/units/modules/network/f5/test_bigip_gtm_pool.py
@ -0,0 +1,326 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright 2017 F5 Networks Inc.
+#
+# 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/>.
+
+from __future__ import (absolute_import, division, print_function)
+__metaclass__ = type
+
+import sys
+
+if sys.version_info < (2, 7):
+    from nose.plugins.skip import SkipTest
+    raise SkipTest("F5 Ansible modules require Python >= 2.7")
+
+import os
+import json
+
+from ansible.compat.tests import unittest
+from ansible.compat.tests.mock import patch, Mock
+from ansible.module_utils import basic
+from ansible.module_utils._text import to_bytes
+from ansible.module_utils.f5_utils import AnsibleF5Client
+
+try:
+    from library.bigip_gtm_pool import Parameters
+    from library.bigip_gtm_pool import ModuleManager
+    from library.bigip_gtm_pool import ArgumentSpec
+    from library.bigip_gtm_pool import UntypedManager
+    from library.bigip_gtm_pool import TypedManager
+except ImportError:
+    from ansible.modules.network.f5.bigip_gtm_pool import Parameters
+    from ansible.modules.network.f5.bigip_gtm_pool import ModuleManager
+    from ansible.modules.network.f5.bigip_gtm_pool import ArgumentSpec
+    from ansible.modules.network.f5.bigip_gtm_pool import UntypedManager
+    from ansible.modules.network.f5.bigip_gtm_pool import TypedManager
+
+fixture_path = os.path.join(os.path.dirname(__file__), 'fixtures')
+fixture_data = {}
+
+
+def set_module_args(args):
+    args = json.dumps({'ANSIBLE_MODULE_ARGS': args})
+    basic._ANSIBLE_ARGS = to_bytes(args)
+
+
+def load_fixture(name):
+    path = os.path.join(fixture_path, name)
+
+    if path in fixture_data:
+        return fixture_data[path]
+
+    with open(path) as f:
+        data = f.read()
+
+    try:
+        data = json.loads(data)
+    except Exception:
+        pass
+
+    fixture_data[path] = data
+    return data
+
+
+class TestParameters(unittest.TestCase):
+    def test_module_parameters(self):
+        args = dict(
+            name='foo',
+            preferred_lb_method='topology',
+            alternate_lb_method='ratio',
+            fallback_lb_method='fewest-hops',
+            fallback_ip='10.10.10.10',
+            type='a'
+        )
+        p = Parameters(args)
+        assert p.name == 'foo'
+        assert p.preferred_lb_method == 'topology'
+        assert p.alternate_lb_method == 'ratio'
+        assert p.fallback_lb_method == 'fewest-hops'
+        assert p.fallback_ip == '10.10.10.10'
+        assert p.type == 'a'
+
+    def test_api_parameters(self):
+        args = dict(
+            name='foo',
+            loadBalancingMode='topology',
+            alternateMode='ratio',
+            fallbackMode='fewest-hops',
+            fallbackIp='10.10.10.10'
+        )
+        p = Parameters(args)
+        assert p.name == 'foo'
+        assert p.preferred_lb_method == 'topology'
+        assert p.alternate_lb_method == 'ratio'
+        assert p.fallback_lb_method == 'fewest-hops'
+        assert p.fallback_ip == '10.10.10.10'
+
+
+@patch('ansible.module_utils.f5_utils.AnsibleF5Client._get_mgmt_root',
+       return_value=True)
+class TestUntypedManager(unittest.TestCase):
+
+    def setUp(self):
+        self.spec = ArgumentSpec()
+
+    def test_create_pool(self, *args):
+        set_module_args(dict(
+            name='foo',
+            preferred_lb_method='round-robin',
+            password='passsword',
+            server='localhost',
+            user='admin'
+        ))
+
+        client = AnsibleF5Client(
+            argument_spec=self.spec.argument_spec,
+            supports_check_mode=self.spec.supports_check_mode,
+            f5_product_name=self.spec.f5_product_name
+        )
+
+        # Override methods in the specific type of manager
+        tm = UntypedManager(client)
+        tm.exists = Mock(side_effect=[False, True])
+        tm.create_on_device = Mock(return_value=True)
+
+        # Override methods to force specific logic in the module to happen
+        mm = ModuleManager(client)
+        mm.version_is_less_than_12 = Mock(return_value=True)
+        mm.get_manager = Mock(return_value=tm)
+        mm.gtm_provisioned = Mock(return_value=True)
+
+        results = mm.exec_module()
+
+        assert results['changed'] is True
+        assert results['preferred_lb_method'] == 'round-robin'
+
+    def test_update_pool(self, *args):
+        set_module_args(dict(
+            name='foo',
+            preferred_lb_method='topology',
+            alternate_lb_method='drop-packet',
+            fallback_lb_method='cpu',
+            password='passsword',
+            server='localhost',
+            user='admin'
+        ))
+
+        client = AnsibleF5Client(
+            argument_spec=self.spec.argument_spec,
+            supports_check_mode=self.spec.supports_check_mode,
+            f5_product_name=self.spec.f5_product_name
+        )
+
+        current = Parameters(load_fixture('load_gtm_pool_untyped_default.json'))
+
+        # Override methods in the specific type of manager
+        tm = UntypedManager(client)
+        tm.exists = Mock(side_effect=[True, True])
+        tm.update_on_device = Mock(return_value=True)
+        tm.read_current_from_device = Mock(return_value=current)
+
+        # Override methods to force specific logic in the module to happen
+        mm = ModuleManager(client)
+        mm.version_is_less_than_12 = Mock(return_value=True)
+        mm.get_manager = Mock(return_value=tm)
+        mm.gtm_provisioned = Mock(return_value=True)
+
+        results = mm.exec_module()
+
+        assert results['changed'] is True
+        assert results['preferred_lb_method'] == 'topology'
+        assert results['alternate_lb_method'] == 'drop-packet'
+        assert results['fallback_lb_method'] == 'cpu'
+
+    def test_delete_pool(self, *args):
+        set_module_args(dict(
+            name='foo',
+            state='absent',
+            password='passsword',
+            server='localhost',
+            user='admin'
+        ))
+
+        client = AnsibleF5Client(
+            argument_spec=self.spec.argument_spec,
+            supports_check_mode=self.spec.supports_check_mode,
+            f5_product_name=self.spec.f5_product_name
+        )
+
+        # Override methods in the specific type of manager
+        tm = UntypedManager(client)
+        tm.exists = Mock(side_effect=[True, False])
+        tm.remove_from_device = Mock(return_value=True)
+
+        # Override methods to force specific logic in the module to happen
+        mm = ModuleManager(client)
+        mm.version_is_less_than_12 = Mock(return_value=True)
+        mm.get_manager = Mock(return_value=tm)
+        mm.gtm_provisioned = Mock(return_value=True)
+
+        results = mm.exec_module()
+
+        assert results['changed'] is True
+
+
+@patch('ansible.module_utils.f5_utils.AnsibleF5Client._get_mgmt_root',
+       return_value=True)
+class TestTypedManager(unittest.TestCase):
+
+    def setUp(self):
+        self.spec = ArgumentSpec()
+
+    def test_create_pool(self, *args):
+        set_module_args(dict(
+            name='foo',
+            preferred_lb_method='round-robin',
+            type='a',
+            password='passsword',
+            server='localhost',
+            user='admin'
+        ))
+
+        client = AnsibleF5Client(
+            argument_spec=self.spec.argument_spec,
+            supports_check_mode=self.spec.supports_check_mode,
+            f5_product_name=self.spec.f5_product_name
+        )
+
+        # Override methods in the specific type of manager
+        tm = TypedManager(client)
+        tm.exists = Mock(side_effect=[False, True])
+        tm.create_on_device = Mock(return_value=True)
+
+        # Override methods to force specific logic in the module to happen
+        mm = ModuleManager(client)
+        mm.version_is_less_than_12 = Mock(return_value=False)
+        mm.get_manager = Mock(return_value=tm)
+        mm.gtm_provisioned = Mock(return_value=True)
+
+        results = mm.exec_module()
+
+        assert results['changed'] is True
+        assert results['preferred_lb_method'] == 'round-robin'
+
+    def test_update_pool(self, *args):
+        set_module_args(dict(
+            name='foo',
+            preferred_lb_method='topology',
+            alternate_lb_method='drop-packet',
+            fallback_lb_method='cpu',
+            type='a',
+            password='passsword',
+            server='localhost',
+            user='admin'
+        ))
+
+        client = AnsibleF5Client(
+            argument_spec=self.spec.argument_spec,
+            supports_check_mode=self.spec.supports_check_mode,
+            f5_product_name=self.spec.f5_product_name
+        )
+
+        current = Parameters(load_fixture('load_gtm_pool_a_default.json'))
+
+        # Override methods in the specific type of manager
+        tm = TypedManager(client)
+        tm.exists = Mock(side_effect=[True, True])
+        tm.update_on_device = Mock(return_value=True)
+        tm.read_current_from_device = Mock(return_value=current)
+
+        # Override methods to force specific logic in the module to happen
+        mm = ModuleManager(client)
+        mm.version_is_less_than_12 = Mock(return_value=False)
+        mm.get_manager = Mock(return_value=tm)
+        mm.gtm_provisioned = Mock(return_value=True)
+
+        results = mm.exec_module()
+
+        assert results['changed'] is True
+        assert results['preferred_lb_method'] == 'topology'
+        assert results['alternate_lb_method'] == 'drop-packet'
+        assert results['fallback_lb_method'] == 'cpu'
+
+    def test_delete_pool(self, *args):
+        set_module_args(dict(
+            name='foo',
+            type='a',
+            state='absent',
+            password='passsword',
+            server='localhost',
+            user='admin'
+        ))
+
+        client = AnsibleF5Client(
+            argument_spec=self.spec.argument_spec,
+            supports_check_mode=self.spec.supports_check_mode,
+            f5_product_name=self.spec.f5_product_name
+        )
+
+        # Override methods in the specific type of manager
+        tm = TypedManager(client)
+        tm.exists = Mock(side_effect=[True, False])
+        tm.remove_from_device = Mock(return_value=True)
+
+        # Override methods to force specific logic in the module to happen
+        mm = ModuleManager(client)
+        mm.version_is_less_than_12 = Mock(return_value=False)
+        mm.get_manager = Mock(return_value=tm)
+        mm.gtm_provisioned = Mock(return_value=True)
+
+        results = mm.exec_module()
+
+        assert results['changed'] is True