Merge pull request #3 from terraform-google-modules/feature/automatic-project-deletion-example

Add submodule that automatically cleans up old projects

Author: aaron-lane

.gitignore

@@ -5,3 +5,7 @@ credentials.json
 *.iml
 .idea
 
+examples/**/*.zip
+examples/**/terraform.tfvars
+modules/**/terraform.tfvars
+submodules/**/terraform.tfvars

modules/project_cleanup/README.md

@@ -0,0 +1,37 @@
+# Old Project Cleanup Utility Module
+
+This module schedules a job to clean up GCP projects older than a specified length of time, that match a particular key-value pair. This job runs every 5 minutes via Google Cloud Scheduled Functions. Please see the [utility's readme](./function_source/README.md) for more information as to its operation and configuration.
+
+## Requirements
+
+### App Engine
+
+Running this module requires an App Engine app in the specified project/region. More information is in the [root readme](../../README.md#app-engine).
+
+### Enabled Services
+
+The following services must be enabled on the project housing the cleanup function prior to invoking this module:
+
+- Cloud Functions (`cloudfunctions.googleapis.com`)
+- Cloud Scheduler (`cloudscheduler.googleapis.com`)
+- Cloud Resource Manager (`cloudresourcemanager.googleapis.com`)
+
+[^]: (autogen_docs_start)
+
+
+## Inputs
+
+| Name | Description | Type | Default | Required |
+|------|-------------|:----:|:-----:|:-----:|
+| organization_id | The organization ID whose projects to clean up | string | - | yes |
+| project_id | The project ID to host the scheduled function in | string | - | yes |
+| region | The region the project is in (App Engine specific) | string | `us-central1` | no |
+
+## Outputs
+
+| Name | Description |
+|------|-------------|
+| name | The name of the job created |
+| project_id | The project ID |
+
+[^]: (autogen_docs_end)

modules/project_cleanup/function_source/README.md

@@ -0,0 +1,22 @@
+# Project Cleanup Utility
+
+This is a simple utility that scans a GCP organization for projects matching certain criteria, and enqueues such projects for deletion. Currently supported criteria are the combination of:
+
+- **Age:** Only projects older than the configured age, in hours, will be marked for deletion.
+- **Key-Value Pair:** Only projects whose labels contain the provided key-value pair will be marked for deletion.
+
+Both of these criteria must be met for a project to be deleted.
+
+## Environment Configuration
+
+The following environment variables may be specified to configure the cleanup utility:
+
+| Name | Description | Type | Default | Required |
+|------|-------------|:----:|:-----:|:-----:|
+| `TARGET_TAG_NAME` | The tag name to match on for identifying projects to delete | string | n/a | yes |
+| `TARGET_TAG_VALUE` | The tag value to match on for identifying projects to delete | string | n/a | yes |
+| `MAX_PROJECT_AGE_HOURS` | The project age, in hours, at which point deletion should be considered | integer | n/a | yes |
+
+## Required Permissions
+
+This Cloud Function must be run as a Service Account with the `Organization Administrator` role.

modules/project_cleanup/function_source/go.mod

@@ -0,0 +1,9 @@
+module github.com/terraform-google-modules/project-cleaner
+
+go 1.11
+
+require (
+	golang.org/x/net v0.0.0-20190318221613-d196dffd7c2b
+	golang.org/x/oauth2 v0.0.0-20190226205417-e64efc72b421
+	google.golang.org/api v0.1.0
+)

modules/project_cleanup/function_source/go.sum

@@ -0,0 +1,115 @@
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modules/project_cleanup/function_source/main.go

@@ -0,0 +1,115 @@
+/*
+Copyright 2019 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
+
+    https://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.
+*/
+
+package project_cleaner
+
+import (
+	"fmt"
+	"log"
+	"os"
+	"strconv"
+	"time"
+
+	"golang.org/x/net/context"
+	"golang.org/x/oauth2/google"
+	"google.golang.org/api/cloudresourcemanager/v1"
+)
+
+var (
+	logger = log.New(os.Stdout, "", 0)
+)
+
+// PubSubMessage wraps the message sent to the background Cloud Function by GCP PubSub.
+type PubSubMessage struct {
+	Data []byte `json:"data"`
+}
+
+// CleanUpProjects is the entry point of the scheduled function.
+func CleanUpProjects(ctx context.Context, m PubSubMessage) error {
+	targetTag := os.Getenv("TARGET_TAG_NAME")
+	targetValue := os.Getenv("TARGET_TAG_VALUE")
+	maxAgeInHoursStr := os.Getenv("MAX_PROJECT_AGE_HOURS")
+	maxAgeInHours, err := strconv.ParseInt(maxAgeInHoursStr, 10, 0)
+	if err != nil {
+		logger.Fatal(fmt.Sprintf("Could not convert %s to integer", maxAgeInHoursStr))
+		return err
+	}
+	logger.Println(fmt.Sprintf("Launching project cleanup for projects older than %d hours, with tag %s=%s", maxAgeInHours, targetTag, targetValue))
+	err = deleteProjectsMatchingTag(ctx, targetTag, targetValue, maxAgeInHours)
+	if err != nil {
+		logger.Fatal(err)
+	}
+	return err
+}
+
+func deleteProjectsMatchingTag(ctx context.Context, key string, value string, acceptableAgeInHours int64) error {
+	logger.Println("Initializing Google client")
+	c, err := google.DefaultClient(ctx, cloudresourcemanager.CloudPlatformScope)
+	if err != nil {
+		return err
+	}
+
+	cloudResourceManagerService, err := cloudresourcemanager.New(c)
+	if err != nil {
+		return err
+	}
+
+	resourceCreationCutoff := tooOldTime(int64(acceptableAgeInHours * 60 * 60))
+
+	logger.Println("Looking through projects")
+	req := cloudResourceManagerService.Projects.List()
+	if err := req.Pages(ctx, func(page *cloudresourcemanager.ListProjectsResponse) error {
+		for _, project := range page.Projects {
+			if val, ok := project.Labels[key]; !(ok && val == value) {
+				logger.Println(fmt.Sprintf("Rejecting project %s because of missing label", project.ProjectId))
+				continue
+			}
+
+			if project.LifecycleState != "ACTIVE" {
+				logger.Println(fmt.Sprintf("Rejecting project %s because lifecycle state is not ACTIVE", project.ProjectId))
+				continue
+			}
+
+			projectCreatedAt, err := time.Parse(time.RFC3339, project.CreateTime)
+			if err != nil {
+				return err
+			}
+
+			if !projectCreatedAt.Before(resourceCreationCutoff) {
+				logger.Println(fmt.Sprintf("Rejecting project %s because it was created too recently", project.ProjectId))
+				continue
+			}
+
+			logger.Println(fmt.Sprintf("Project %s was created at %s, is active, and is older than %d hours. Deleting.", project.ProjectId, project.CreateTime, acceptableAgeInHours))
+
+			_, err = cloudResourceManagerService.Projects.Delete(project.ProjectId).Do()
+			if err != nil {
+				logger.Fatal(err)
+				return err
+			}
+			logger.Println(fmt.Sprintf("Requested deletion of project %s.", project.ProjectId))
+		}
+		return nil
+	}); err != nil {
+		return err
+	}
+	logger.Println("Considered all projects")
+	return nil
+}
+
+func tooOldTime(i int64) time.Time {
+	return time.Unix(time.Now().Unix()-i, 0)
+}