[GCP] Forwarding Rule module (#24627)

* [GCP] Forwarding Rule module

* pep8 formatting for tests

* remove py26 check and updated_ key; docs and typo fixes

lib/ansible/modules/cloud/google/gcp_forwarding_rule.py

@@ -0,0 +1,362 @@
+#!/usr/bin/python
+# Copyright 2017 Google 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 = {'metadata_version': '1.0',
+                    'status': ['preview'],
+                    'supported_by': 'community'}
+
+
+DOCUMENTATION = '''
+---
+module: gcp_forwarding_rule
+version_added: "2.4"
+short_description: Create, Update or Destroy a Forwarding_Rule.
+description:
+    - Create, Update or Destroy a Forwarding_Rule. See
+      U(https://cloud.google.com/compute/docs/load-balancing/http/target-proxies) for an overview.
+      More details on the Global Forwarding_Rule API can be found at
+      U(https://cloud.google.com/compute/docs/reference/latest/globalForwardingRules)
+      More details on the Forwarding Rules API can be found at
+      U(https://cloud.google.com/compute/docs/reference/latest/forwardingRules)
+requirements:
+  - "python >= 2.6"
+  - "google-api-python-client >= 1.6.2"
+  - "google-auth >= 0.9.0"
+  - "google-auth-httplib2 >= 0.0.2"
+notes:
+  - Currently only supports global forwarding rules.
+    As such, Load Balancing Scheme is always EXTERNAL.
+author:
+  - "Tom Melendez (@supertom) <tom@supertom.com>"
+options:
+  address:
+    description:
+       - IPv4 or named IP address. Must be of the same scope (regional, global).
+         Reserved addresses can (and probably should) be used for global
+         forwarding rules. You may reserve IPs from the console or
+         via the gce_eip module.
+    required: false
+  forwarding_rule_name:
+    description:
+       - Name of the Forwarding_Rule.
+    required: true
+  port_range:
+    description:
+       - For global forwarding rules, must be set to 80 or 8080 for TargetHttpProxy, and
+         443 for TargetHttpsProxy or TargetSslProxy.
+    required: false
+  protocol:
+    description:
+       - For global forwarding rules, TCP, UDP, ESP, AH, SCTP or ICMP. Default is TCP.
+    required: false
+  region:
+    description:
+       - The region for this forwarding rule. Currently, only 'global' is supported.
+    required: false
+  state:
+    description:
+       - The state of the Forwarding Rule. 'present' or 'absent'
+    required: true
+    choices: ["present", "absent"]
+  target:
+    description:
+       - Target resource for forwarding rule. For global proxy, this is a Global
+         TargetProxy resource. Required for external load balancing (including Global load balancing)
+    required: false
+'''
+
+EXAMPLES = '''
+- name: Create Minimum GLOBAL Forwarding_Rule
+  gcp_forwarding_rule:
+    service_account_email: "{{ service_account_email }}"
+    credentials_file: "{{ credentials_file }}"
+    project_id: "{{ project_id }}"
+    forwarding_rule_name: my-forwarding_rule
+    protocol: TCP
+    port_range: 80
+    region: global
+    target: my-target-proxy
+    state: present
+
+- name: Create Forwarding_Rule w/reserved static address
+  gcp_forwarding_rule:
+    service_account_email: "{{ service_account_email }}"
+    credentials_file: "{{ credentials_file }}"
+    project_id: "{{ project_id }}"
+    forwarding_rule_name: my-forwarding_rule
+    protocol: TCP
+    port_range: 80
+    address: my-reserved-static-address-name
+    region: global
+    target: my-target-proxy
+    state: present
+'''
+
+RETURN = '''
+forwarding_rule_name:
+    description: Name of the Forwarding_Rule
+    returned: Always
+    type: str
+    sample: my-target-proxy
+forwarding_rule:
+    description: GCP Forwarding_Rule dictionary
+    returned: Always. Refer to GCP documentation for detailed field descriptions.
+    type: dict
+    sample: { "name": "my-forwarding_rule", "target": "..." }
+region:
+    description: Region for Forwarding Rule.
+    returned: Always
+    type: bool
+    sample: true
+state:
+    description: state of the Forwarding_Rule
+    returned: Always.
+    type: str
+    sample: present
+'''
+
+
+# import module snippets
+from ansible.module_utils.basic import AnsibleModule
+from ansible.module_utils.gcp import get_google_api_client, GCPUtils
+
+USER_AGENT_PRODUCT = 'ansible-forwarding_rule'
+USER_AGENT_VERSION = '0.0.1'
+
+
+def _build_global_forwarding_rule_dict(params, project_id=None):
+    """
+    Reformat services in Ansible Params.
+
+    :param params: Params from AnsibleModule object
+    :type params: ``dict``
+
+    :param project_id: The GCP project ID.
+    :type project_id:  ``str``
+
+    :return: dictionary suitable for submission to GCP API.
+    :rtype ``dict``
+    """
+    url = ''
+    if project_id:
+        url = GCPUtils.build_googleapi_url(project_id)
+    gcp_dict = GCPUtils.params_to_gcp_dict(params, 'forwarding_rule_name')
+    if 'target' in gcp_dict:
+        gcp_dict['target'] = '%s/global/targetHttpProxies/%s' % (url,
+                                                                 gcp_dict['target'])
+    if 'address' in gcp_dict:
+        gcp_dict['IPAddress'] = '%s/global/addresses/%s' % (url,
+                                                            gcp_dict['address'])
+        del gcp_dict['address']
+    if 'protocol' in gcp_dict:
+        gcp_dict['IPProtocol'] = gcp_dict['protocol']
+        del gcp_dict['protocol']
+    return gcp_dict
+
+
+def get_global_forwarding_rule(client, name, project_id=None):
+    """
+    Get a Global Forwarding Rule from GCP.
+
+    :param client: An initialized GCE Compute Disovery resource.
+    :type client:  :class: `googleapiclient.discovery.Resource`
+
+    :param name: Name of the Global Forwarding Rule.
+    :type name:  ``str``
+
+    :param project_id: The GCP project ID.
+    :type project_id:  ``str``
+
+    :return: A dict resp from the respective GCP 'get' request.
+    :rtype: ``dict``
+    """
+    try:
+        req = client.globalForwardingRules().get(
+            project=project_id, forwardingRule=name)
+        return GCPUtils.execute_api_client_req(req, raise_404=False)
+    except:
+        raise
+
+
+def create_global_forwarding_rule(client, params, project_id):
+    """
+    Create a new Global Forwarding Rule.
+
+    :param client: An initialized GCE Compute Disovery resource.
+    :type client:  :class: `googleapiclient.discovery.Resource`
+
+    :param params: Dictionary of arguments from AnsibleModule.
+    :type params:  ``dict``
+
+    :return: Tuple with changed status and response dict
+    :rtype: ``tuple`` in the format of (bool, dict)
+    """
+    gcp_dict = _build_global_forwarding_rule_dict(params, project_id)
+    try:
+        req = client.globalForwardingRules().insert(project=project_id, body=gcp_dict)
+        return_data = GCPUtils.execute_api_client_req(req, client, raw=False)
+        if not return_data:
+            return_data = get_global_forwarding_rule(client,
+                                                     name=params['forwarding_rule_name'],
+                                                     project_id=project_id)
+        return (True, return_data)
+    except:
+        raise
+
+
+def delete_global_forwarding_rule(client, name, project_id):
+    """
+    Delete a Global Forwarding Rule.
+
+    :param client: An initialized GCE Compute Discovery resource.
+    :type client:  :class: `googleapiclient.discovery.Resource`
+
+    :param name: Name of the Target Proxy.
+    :type name:  ``str``
+
+    :param project_id: The GCP project ID.
+    :type project_id:  ``str``
+
+    :return: Tuple with changed status and response dict
+    :rtype: ``tuple`` in the format of (bool, dict)
+    """
+    try:
+        req = client.globalForwardingRules().delete(
+            project=project_id, forwardingRule=name)
+        return_data = GCPUtils.execute_api_client_req(req, client)
+        return (True, return_data)
+    except:
+        raise
+
+
+def update_global_forwarding_rule(client, forwarding_rule, params, name, project_id):
+    """
+    Update a Global Forwarding_Rule. Currently, only a target can be updated.
+
+    If the forwarding_rule has not changed, the update will not occur.
+
+    :param client: An initialized GCE Compute Disovery resource.
+    :type client:  :class: `googleapiclient.discovery.Resource`
+
+    :param forwarding_rule: Name of the Target Proxy.
+    :type forwarding_rule:  ``dict``
+
+    :param params: Dictionary of arguments from AnsibleModule.
+    :type params:  ``dict``
+
+    :param name: Name of the Global Forwarding Rule.
+    :type name:  ``str``
+
+    :param project_id: The GCP project ID.
+    :type project_id:  ``str``
+
+    :return: Tuple with changed status and response dict
+    :rtype: ``tuple`` in the format of (bool, dict)
+    """
+    gcp_dict = _build_global_forwarding_rule_dict(params, project_id)
+
+    ans = GCPUtils.are_params_equal(forwarding_rule, gcp_dict)
+    if forwarding_rule['target'] == gcp_dict['target']:
+        return (False, 'no update necessary')
+
+    try:
+        req = client.globalForwardingRules().setTarget(project=project_id,
+                                                       forwardingRule=name,
+                                                       body={'target': gcp_dict['target']})
+        return_data = GCPUtils.execute_api_client_req(
+            req, client=client, raw=False)
+        return (True, return_data)
+    except:
+        raise
+
+
+def main():
+    module = AnsibleModule(argument_spec=dict(
+        forwarding_rule_name=dict(required=True),
+        region=dict(required=True),
+        target=dict(required=False),
+        address=dict(type='str', required=False),
+        protocol=dict(required=False, default='TCP', choices=['TCP']),
+        port_range=dict(required=False),
+        load_balancing_scheme=dict(
+            required=False, default='EXTERNAL', choices=['EXTERNAL']),
+        state=dict(required=True, choices=['absent', 'present']),
+        service_account_email=dict(),
+        service_account_permissions=dict(type='list'),
+        pem_file=dict(),
+        credentials_file=dict(),
+        project_id=dict(), ), )
+
+    client, conn_params = get_google_api_client(module, 'compute', user_agent_product=USER_AGENT_PRODUCT,
+                                                user_agent_version=USER_AGENT_VERSION)
+
+    params = {}
+    params['state'] = module.params.get('state')
+    params['forwarding_rule_name'] = module.params.get('forwarding_rule_name')
+    params['region'] = module.params.get('region')
+    params['target'] = module.params.get('target', None)
+    params['protocol'] = module.params.get('protocol', None)
+    params['port_range'] = module.params.get('port_range')
+    if module.params.get('address', None):
+        params['address'] = module.params.get('address', None)
+
+    if params['region'] != 'global':
+        # This module currently doesn't support regional rules.
+        module.fail_json(
+            msg=("%s - Only global forwarding rules currently supported. "
+                 "Be sure to specify 'global' for the region option.") %
+            (params['forwarding_rule_name']))
+
+    changed = False
+    json_output = {'state': params['state']}
+    forwarding_rule = None
+    if params['region'] == 'global':
+        forwarding_rule = get_global_forwarding_rule(client,
+                                                     name=params['forwarding_rule_name'],
+                                                     project_id=conn_params['project_id'])
+    if not forwarding_rule:
+        if params['state'] == 'absent':
+            # Doesn't exist in GCE, and state==absent.
+            changed = False
+            module.fail_json(
+                msg="Cannot delete unknown forwarding_rule: %s" %
+                (params['forwarding_rule_name']))
+        else:
+            # Create
+            changed, json_output['forwarding_rule'] = create_global_forwarding_rule(client,
+                                                                                    params=params,
+                                                                                    project_id=conn_params['project_id'])
+    elif params['state'] == 'absent':
+        # Delete
+        changed, json_output['forwarding_rule'] = delete_global_forwarding_rule(client,
+                                                                                name=params['forwarding_rule_name'],
+                                                                                project_id=conn_params['project_id'])
+    else:
+        changed, json_output['forwarding_rule'] = update_global_forwarding_rule(client,
+                                                                                forwarding_rule=forwarding_rule,
+                                                                                params=params,
+                                                                                name=params['forwarding_rule_name'],
+                                                                                project_id=conn_params['project_id'])
+
+    json_output['changed'] = changed
+    json_output.update(params)
+    module.exit_json(**json_output)
+
+
+if __name__ == '__main__':
+    main()

test/units/modules/cloud/google/test_gcp_forwarding_rule.py

@@ -0,0 +1,30 @@
+import unittest
+
+from ansible.modules.cloud.google.gcp_forwarding_rule import _build_global_forwarding_rule_dict
+
+
+class TestGCPFowardingRule(unittest.TestCase):
+    """Unit tests for gcp_fowarding_rule module."""
+    params_dict = {
+        'forwarding_rule_name': 'foo_fowarding_rule_name',
+        'address': 'foo_external_address',
+        'target': 'foo_targetproxy',
+        'region': 'global',
+        'port_range': 80,
+        'protocol': 'TCP',
+        'state': 'present',
+    }
+
+    def test__build_global_forwarding_rule_dict(self):
+
+        expected = {
+            'name': 'foo_fowarding_rule_name',
+            'IPAddress': 'https://www.googleapis.com/compute/v1/projects/my-project/global/addresses/foo_external_address',
+            'target': 'https://www.googleapis.com/compute/v1/projects/my-project/global/targetHttpProxies/foo_targetproxy',
+            'region': 'global',
+            'portRange': 80,
+            'IPProtocol': 'TCP',
+        }
+        actual = _build_global_forwarding_rule_dict(
+            self.params_dict, 'my-project')
+        self.assertEqual(expected, actual)