FAST plugin system

.github/workflows/linting.yml

@@ -56,7 +56,7 @@ jobs:
       - name: Check documentation
         id: documentation-fabric
         run: |
-          python3 tools/check_documentation.py modules fast blueprints
+          python3 tools/check_documentation.py --show-diffs modules fast blueprints
 
       - name: Check documentation links
         id: documentation-links-fabric

blueprints/serverless/api-gateway/README.md

@@ -23,7 +23,6 @@ Clone this repository or [open it in cloud shell](https://ssh.cloud.google.com/c
 
 Once done testing, you can clean up resources by running `terraform destroy`.
 
-
 <!-- BEGIN TFDOC -->
 
 ## Variables

fast/.gitignore

@@ -0,0 +1,2 @@
+stages/[0-9]*/local-*.tf
+stages-multitenant/[0-9]*/local-*.tf

fast/plugins/2-networking-serverless-connector/README.md

@@ -0,0 +1,40 @@
+# VPC Serverless Connector
+
+This FAST plugin adds centralized [Serverless VPC Access Connectors](https://cloud.google.com/vpc/docs/serverless-vpc-access) to network stages.
+
+This plugin does not manage
+
+- IAM bindings for the connectors, which should be added via the stage project-level variables
+- firewall rules for the connectors, which should be added via the stage factory
+
+The plugin only requires a specific configuration if the defaults it uses need to be changed:
+
+- the connector-specific subnets default to the `10.255.255.0` range
+- the machine type, number of instances and thoughput use the API defaults
+
+To enable the plugin, simply copy or link its files in the networking stage.
+
+<!-- TFDOC OPTS files:1 show_extra:1 -->
+<!-- BEGIN TFDOC -->
+
+## Files
+
+| name | description | modules | resources |
+|---|---|---|---|
+| [local-serverless-connector-outputs.tf](./local-serverless-connector-outputs.tf) | Serverless Connector outputs. |  | <code>google_storage_bucket_object</code> · <code>local_file</code> |
+| [local-serverless-connector-variables.tf](./local-serverless-connector-variables.tf) | Serverless Connector variables. |  |  |
+| [local-serverless-connector.tf](./local-serverless-connector.tf) | Serverless Connector resources. | <code>net-vpc</code> | <code>google_vpc_access_connector</code> |
+
+## Variables
+
+| name | description | type | required | default | producer |
+|---|---|:---:|:---:|:---:|:---:|
+| [serverless_connector_config](local-serverless-connector-variables.tf#L19) | VPC Access Serverless Connectors configuration. | <code title="object&#40;&#123;&#10;  dev-primary &#61; object&#40;&#123;&#10;    ip_cidr_range &#61; optional&#40;string, &#34;10.255.255.128&#47;28&#34;&#41;&#10;    machine_type  &#61; optional&#40;string&#41;&#10;    instances &#61; optional&#40;object&#40;&#123;&#10;      max &#61; optional&#40;number&#41;&#10;      min &#61; optional&#40;number&#41;&#10;    &#125;&#41;, &#123;&#125;&#41;&#10;    throughput &#61; optional&#40;object&#40;&#123;&#10;      max &#61; optional&#40;number&#41;&#10;      min &#61; optional&#40;number&#41;&#10;    &#125;&#41;, &#123;&#125;&#41;&#10;  &#125;&#41;&#10;  prod-primary &#61; object&#40;&#123;&#10;    ip_cidr_range &#61; optional&#40;string, &#34;10.255.255.0&#47;28&#34;&#41;&#10;    machine_type  &#61; optional&#40;string&#41;&#10;    instances &#61; optional&#40;object&#40;&#123;&#10;      max &#61; optional&#40;number&#41;&#10;      min &#61; optional&#40;number&#41;&#10;    &#125;&#41;, &#123;&#125;&#41;&#10;    throughput &#61; optional&#40;object&#40;&#123;&#10;      max &#61; optional&#40;number&#41;&#10;      min &#61; optional&#40;number&#41;&#10;    &#125;&#41;, &#123;&#125;&#41;&#10;  &#125;&#41;&#10;&#125;&#41;">object&#40;&#123;&#8230;&#125;&#41;</code> |  | <code title="&#123;&#10;  dev-primary  &#61; &#123;&#125;&#10;  prod-primary &#61; &#123;&#125;&#10;&#125;">&#123;&#8230;&#125;</code> |  |
+
+## Outputs
+
+| name | description | sensitive | consumers |
+|---|---|:---:|---|
+| [plugin_sc_connectors](local-serverless-connector-outputs.tf#L43) | VPC Access Connectors. |  |  |
+
+<!-- END TFDOC -->

fast/plugins/2-networking-serverless-connector/local-serverless-connector-outputs.tf

@@ -0,0 +1,46 @@
+/**
+ * Copyright 2023 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+# tfdoc:file:description Serverless Connector outputs.
+
+locals {
+  plugin_sc_tfvars = {
+    dev  = google_vpc_access_connector.dev-primary.0.id
+    prod = google_vpc_access_connector.prod-primary.0.id
+  }
+}
+
+# generate tfvars file for subsequent stages
+
+resource "local_file" "plugin_sc_tfvars" {
+  for_each        = var.outputs_location == null ? {} : { 1 = 1 }
+  file_permission = "0644"
+  filename        = "${try(pathexpand(var.outputs_location), "")}/tfvars/2-networking-serverless-connnector.auto.tfvars.json"
+  content         = jsonencode(local.plugin_sc_tfvars)
+}
+
+resource "google_storage_bucket_object" "plugin_sc_tfvars" {
+  bucket  = var.automation.outputs_bucket
+  name    = "tfvars/2-networking-serverless-connnector.auto.tfvars.json"
+  content = jsonencode(local.plugin_sc_tfvars)
+}
+
+# outputs
+
+output "plugin_sc_connectors" {
+  description = "VPC Access Connectors."
+  value       = local.plugin_sc_tfvars
+}

fast/plugins/2-networking-serverless-connector/local-serverless-connector-variables.tf

@@ -0,0 +1,52 @@
+/**
+ * Copyright 2023 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+# tfdoc:file:description Serverless Connector variables.
+
+variable "serverless_connector_config" {
+  description = "VPC Access Serverless Connectors configuration."
+  type = object({
+    dev-primary = object({
+      ip_cidr_range = optional(string, "10.255.255.128/28")
+      machine_type  = optional(string)
+      instances = optional(object({
+        max = optional(number)
+        min = optional(number)
+      }), {})
+      throughput = optional(object({
+        max = optional(number)
+        min = optional(number)
+      }), {})
+    })
+    prod-primary = object({
+      ip_cidr_range = optional(string, "10.255.255.0/28")
+      machine_type  = optional(string)
+      instances = optional(object({
+        max = optional(number)
+        min = optional(number)
+      }), {})
+      throughput = optional(object({
+        max = optional(number)
+        min = optional(number)
+      }), {})
+    })
+  })
+  default = {
+    dev-primary  = {}
+    prod-primary = {}
+  }
+  nullable = false
+}

fast/plugins/2-networking-serverless-connector/local-serverless-connector.tf

@@ -0,0 +1,84 @@
+/**
+ * Copyright 2023 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+# tfdoc:file:description Serverless Connector resources.
+
+locals {
+  plugin_sc_subnets = {
+    dev = {
+      for k, v in module.dev-spoke-vpc-serverless.subnets : k => v.name
+    }
+    prod = {
+      for k, v in module.prod-spoke-vpc-serverless.subnets : k => v.name
+    }
+  }
+}
+
+module "dev-spoke-vpc-serverless" {
+  source     = "../../../modules/net-vpc"
+  project_id = module.dev-spoke-project.project_id
+  name       = module.dev-spoke-vpc.name
+  vpc_create = false
+  subnets = [{
+    name          = "access-connector"
+    description   = "VPC Serverless Connector for the primary region."
+    ip_cidr_range = var.serverless_connector_config.dev-primary.ip_cidr_range
+    region        = var.regions.primary
+  }]
+}
+
+module "prod-spoke-vpc-serverless" {
+  source     = "../../../modules/net-vpc"
+  project_id = module.prod-spoke-project.project_id
+  name       = module.prod-spoke-vpc.name
+  vpc_create = false
+  subnets = [{
+    name          = "access-connector"
+    description   = "VPC Serverless Connector for the primary region."
+    ip_cidr_range = var.serverless_connector_config.prod-primary.ip_cidr_range
+    region        = var.regions.primary
+  }]
+}
+
+resource "google_vpc_access_connector" "dev-primary" {
+  count   = var.serverless_connector_config.dev-primary == null ? 0 : 1
+  project = module.dev-spoke-project.project_id
+  region  = var.regions.primary
+  name    = "access-connector-${local.region_shortnames[var.regions.primary]}"
+  subnet {
+    name = local.plugin_sc_subnets.dev["${var.regions.primary}/access-connector"]
+  }
+  machine_type   = var.serverless_connector_config.dev-primary.machine_type
+  max_instances  = var.serverless_connector_config.dev-primary.instances.max
+  max_throughput = var.serverless_connector_config.dev-primary.throughput.max
+  min_instances  = var.serverless_connector_config.dev-primary.instances.min
+  min_throughput = var.serverless_connector_config.dev-primary.throughput.min
+}
+
+resource "google_vpc_access_connector" "prod-primary" {
+  count   = var.serverless_connector_config.prod-primary == null ? 0 : 1
+  project = module.prod-spoke-project.project_id
+  region  = var.regions.primary
+  name    = "access-connector-${local.region_shortnames[var.regions.primary]}"
+  subnet {
+    name = local.plugin_sc_subnets.prod["${var.regions.primary}/access-connector"]
+  }
+  machine_type   = var.serverless_connector_config.prod-primary.machine_type
+  max_instances  = var.serverless_connector_config.prod-primary.instances.max
+  max_throughput = var.serverless_connector_config.prod-primary.throughput.max
+  min_instances  = var.serverless_connector_config.prod-primary.instances.min
+  min_throughput = var.serverless_connector_config.prod-primary.throughput.min
+}

fast/plugins/README.md

@@ -0,0 +1,25 @@
+# FAST plugin system
+
+This folders details a simple mechanism that can be used to add extra functionality to FAST stages, and a few examples that implement simple plugins that can be used as-is.
+
+## Available plugins
+
+### Networking
+
+- [Serverless VPC Access Connector](./2-networking-serverless-connector/)
+
+## Anatomy of a plugin
+
+FAST plugins are much simpler and easier to code than full-blown stages: each plugin is meant to add a single feature using a small set of resources, and interacting directly with stage modules and variables.
+
+A simple plugin might be composed of a single file with one resource, and grow up to the canonical set of one "main" (resources), one variables, and outputs file.
+
+Plugin file names start with the `local-` prefix which is purposefully excluded in FAST stages via Git ignore, so that plugins are not accidentally committed to stages during development and staying aligned with our master branch is possible.
+
+Plugins are structured here as individual folders, organized in top-level folders according to the FAST stage they are designed to work with.
+
+As an example, the [`2-networking/serverless-connector` plugin](./2-networking-serverless-connector/) implements centralized [Serverless VPC Access Connectors](https://cloud.google.com/vpc/docs/serverless-vpc-access) for our networking stages, and is composed of three files:
+
+- [`local-serverless-connector.tf`](./2-networking-serverless-connector/local-serverless-connector.tf) managing resources including the subnets needed in each VPC and the connectors themselves
+- [`local-serverless-connector-outputs.tf`](./2-networking-serverless-connector/local-serverless-connector-outputs.tf) defining a single `serverless_connectors` output for the plugin, and optional output files
+- [`local-serverless-connector-variables.tf`](./2-networking-serverless-connector/local-serverless-connector-variables.tf) defining a single `serverless_connector_config` variable used to configure the plugin

fast/stages/2-networking-a-peering/spoke-dev.tf

@@ -30,6 +30,7 @@ module "dev-spoke-project" {
     "networkmanagement.googleapis.com",
     "servicenetworking.googleapis.com",
     "stackdriver.googleapis.com",
+    "vpcaccess.googleapis.com"
   ]
   shared_vpc_host_config = {
     enabled = true

fast/stages/2-networking-a-peering/spoke-prod.tf

@@ -30,6 +30,7 @@ module "prod-spoke-project" {
     "networkmanagement.googleapis.com",
     "servicenetworking.googleapis.com",
     "stackdriver.googleapis.com",
+    "vpcaccess.googleapis.com"
   ]
   shared_vpc_host_config = {
     enabled = true

fast/stages/2-networking-b-vpn/spoke-dev.tf

@@ -30,6 +30,7 @@ module "dev-spoke-project" {
     "networkmanagement.googleapis.com",
     "servicenetworking.googleapis.com",
     "stackdriver.googleapis.com",
+    "vpcaccess.googleapis.com"
   ]
   shared_vpc_host_config = {
     enabled = true

fast/stages/2-networking-b-vpn/spoke-prod.tf

@@ -30,6 +30,7 @@ module "prod-spoke-project" {
     "networkmanagement.googleapis.com",
     "servicenetworking.googleapis.com",
     "stackdriver.googleapis.com",
+    "vpcaccess.googleapis.com"
   ]
   shared_vpc_host_config = {
     enabled = true

fast/stages/2-networking-c-nva/spoke-dev.tf

@@ -29,6 +29,7 @@ module "dev-spoke-project" {
     "networkmanagement.googleapis.com",
     "servicenetworking.googleapis.com",
     "stackdriver.googleapis.com",
+    "vpcaccess.googleapis.com"
   ]
   shared_vpc_host_config = {
     enabled = true

fast/stages/2-networking-c-nva/spoke-prod.tf

@@ -29,6 +29,7 @@ module "prod-spoke-project" {
     "networkmanagement.googleapis.com",
     "servicenetworking.googleapis.com",
     "stackdriver.googleapis.com",
+    "vpcaccess.googleapis.com"
   ]
   shared_vpc_host_config = {
     enabled = true

fast/stages/2-networking-d-separate-envs/spoke-dev.tf

@@ -30,6 +30,7 @@ module "dev-spoke-project" {
     "networkmanagement.googleapis.com",
     "servicenetworking.googleapis.com",
     "stackdriver.googleapis.com",
+    "vpcaccess.googleapis.com"
   ]
   shared_vpc_host_config = {
     enabled          = true

fast/stages/2-networking-d-separate-envs/spoke-prod.tf

@@ -30,6 +30,7 @@ module "prod-spoke-project" {
     "networkmanagement.googleapis.com",
     "servicenetworking.googleapis.com",
     "stackdriver.googleapis.com",
+    "vpcaccess.googleapis.com"
   ]
   shared_vpc_host_config = {
     enabled          = true

tests/collectors.py

@@ -37,6 +37,9 @@ def collect(self):
     have the following structure:
 
     test-name:
+      extra_files:
+        - bar.tf
+        - foo.tf
       tfvars:
         - tfvars1.tfvars
         - tfvars2.tfvars
@@ -60,27 +63,32 @@ def collect(self):
     common = raw.pop('common_tfvars', [])
     for test_name, spec in raw.get('tests', {}).items():
       spec = {} if spec is None else spec
+      extra_files = spec.get('extra_files')
       inventories = spec.get('inventory', [f'{test_name}.yaml'])
-      tfvars = common + [f'{test_name}.tfvars'] + spec.get('tfvars', [])
+      tf_var_files = common + [f'{test_name}.tfvars'] + spec.get('tfvars', [])
       for i in inventories:
         name = test_name
         if isinstance(inventories, list) and len(inventories) > 1:
           name = f'{test_name}[{i}]'
         yield FabricTestItem.from_parent(self, name=name, module=module,
-                                         inventory=[i], tfvars=tfvars)
+                                         inventory=[i],
+                                         tf_var_files=tf_var_files,
+                                         extra_files=extra_files)
 
 
 class FabricTestItem(pytest.Item):
 
-  def __init__(self, name, parent, module, inventory, tfvars):
+  def __init__(self, name, parent, module, inventory, tf_var_files,
+               extra_files=None):
     super().__init__(name, parent)
     self.module = module
     self.inventory = inventory
-    self.tfvars = tfvars
+    self.tf_var_files = tf_var_files
+    self.extra_files = extra_files
 
   def runtest(self):
     s = plan_validator(self.module, self.inventory, self.parent.path.parent,
-                       self.tfvars)
+                       self.tf_var_files, self.extra_files)
 
   def reportinfo(self):
     return self.path, None, self.name