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chore: Adding examples to accompany GCP blog that highlights GKE ACM features (#973)
* Adding examples to accompany GCP blog that highlights GKE ACM features * Addressing comments * Addressing comments * Addressing comments * Addressing comments * Addressing comments * Addressing comments * Addressing comments * Addressing comments * Addressing comments
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‎examples/acm-terraform-blog-part1/README.md‎

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# Enable ACM features with Terraform - Part 1
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This is Part1 of the tutorial to accompany a short series of blog articles explaining how to enable [Anthos Config Management (ACM)](https://cloud.google.com/anthos/config-management) with Terraform.
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In this tutorial, we'll explain how to use Teraform to create a cluster and manage its config from git via [Config Sync](https://cloud.google.com/anthos-config-management/docs/config-sync-overview).
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[Next part](../acm-terraform-blog-part2) will build on that to add guard rails for the cluster via [Policy Controller](https://cloud.google.com/anthos-config-management/docs/concepts/policy-controller). We will focus on enabling an ongoing audit of cluster resources using the Policy Controller's built in [Policy Library](http://cloud/anthos-config-management/docs/reference/constraint-template-library) and a bundle of constraints enforcings [CIS Kubernetes Benchmark v.1.5.1](https://cloud.google.com/kubernetes-engine/docs/concepts/cis-benchmarks).
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Subsequent articles will discuss other aspects of ACM to manage your GCP infrastrcuture.
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## Enable Config Sync on the cluster with Terraform
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1. Clone this repo
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1. Set variables that will be used in multiple commands:
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```bash
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FOLDER_ID = [FOLDER]
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BILLING_ACCOUNT = [BILLING_ACCOUNT]
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PROJECT_ID = [PROJECT_ID]
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```
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1. Create project:
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```bash
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gcloud auth login
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gcloud projects create $PROJECT_ID --name=$PROJECT_ID --folder=$FOLDER_ID
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gcloud alpha billing projects link $PROJECT_ID --billing-account $BILLING_ACCOUNT
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gcloud config set project $PROJECT_ID
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```
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1. Create cluster using terraform using defaults other than the project:
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```bash
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# obtain user access credentials to use for Terraform commands
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gcloud auth application-default login
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# continue in /terraform directory
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cd terraform
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terraform init
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terraform plan -var=project=$PROJECT_ID
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terraform apply -var=project=$PROJECT_ID
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```
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NOTE: if you get an error due to default network not being present, run `gcloud compute networks create default --subnet-mode=auto` and retry the commands.
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1. To verify things have sync'ed, you can use `gcloud` to check status:
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```bash
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gcloud alpha container hub config-management status --project $PROJECT_ID
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```
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In the output, notice that the `Status` will eventually show as `SYNCED` and the `Last_Synced_Token` will match the repo hash.
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1. To see wordpress itself, you can use the kubectl proxy to connect to the service:
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```bash
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# get values from cluster that was created
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export CLUSTER_ZONE=$(terraform output -raw cluster_location)
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export CLUSTER_NAME=$(terraform output -raw cluster_name)
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# then get creditials for it and proxy to the wordpress service to see it running
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gcloud container clusters get-credentials $CLUSTER_NAME --zone $CLUSTER_ZONE --project $PROJECT_ID
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kubectl proxy --port 8888 &
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# curl or use the browser
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curl http://127.0.0.1:8888/api/v1/namespaces/default/services/wordpress/proxy/wp-admin/install.php
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```
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1. Finally, let's clean up. First, don't forget to foreground the proxy again to kill it. Also, apply `terraform destroy` to remove the GCP resources that were deployed to the project.
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```bash
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fg # ctrl-c
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terraform destroy -var=project=$PROJECT_ID
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```

‎examples/acm-terraform-blog-part1/config-root/wordpress-bundle.yaml‎

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# Copyright 2021 Google LLC
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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apiVersion: v1
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kind: ConfigMap
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metadata:
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name: wp-config
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data:
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### We're using a ConfigMap for simplicity, but in real life one should
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### use a secret manager or other best practice for this database password.
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MYSQL_ROOT_PASSWORD: "wp_user"
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---
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apiVersion: v1
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kind: Service
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metadata:
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name: wordpress-mysql
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labels:
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app: wordpress
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spec:
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ports:
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- port: 3306
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selector:
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app: wordpress
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tier: mysql
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clusterIP: None
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---
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apiVersion: v1
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kind: PersistentVolumeClaim
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metadata:
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name: mysql-pvc
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labels:
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app: wordpress
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spec:
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accessModes:
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- ReadWriteOnce
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resources:
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requests:
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storage: 5Gi
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---
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apiVersion: apps/v1
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kind: Deployment
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metadata:
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name: wordpress-mysql
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labels:
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app: wordpress
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spec:
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selector:
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matchLabels:
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app: wordpress
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tier: mysql
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strategy:
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type: Recreate
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template:
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metadata:
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labels:
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app: wordpress
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tier: mysql
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spec:
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containers:
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- image: mariadb:latest
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name: mysql
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env:
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- name: MYSQL_ROOT_PASSWORD
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valueFrom:
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configMapKeyRef:
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name: wp-config
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key: MYSQL_ROOT_PASSWORD
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ports:
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- containerPort: 3306
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name: mysql
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volumeMounts:
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- name: mysql-persistent-storage
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mountPath: /var/lib/mysql
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volumes:
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- name: mysql-persistent-storage
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persistentVolumeClaim:
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claimName: mysql-pvc
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---
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apiVersion: v1
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kind: Service
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metadata:
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name: wordpress
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labels:
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app: wordpress
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spec:
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ports:
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- port: 80
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selector:
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app: wordpress
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tier: frontend
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---
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apiVersion: v1
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kind: PersistentVolumeClaim
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metadata:
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name: wp-pvc
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labels:
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app: wordpress
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spec:
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accessModes:
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- ReadWriteOnce
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resources:
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requests:
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storage: 5Gi
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---
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apiVersion: apps/v1
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kind: Deployment
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metadata:
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name: wordpress
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labels:
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app: wordpress
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spec:
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selector:
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matchLabels:
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app: wordpress
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tier: frontend
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strategy:
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type: Recreate
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template:
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metadata:
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labels:
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app: wordpress
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tier: frontend
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spec:
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containers:
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- image: wordpress:4.8-apache
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name: wordpress
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env:
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- name: WORDPRESS_DB_HOST
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value: wordpress-mysql
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- name: WORDPRESS_DB_PASSWORD
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valueFrom:
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configMapKeyRef:
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name: wp-config
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key: MYSQL_ROOT_PASSWORD
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ports:
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- containerPort: 80
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name: wordpress
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volumeMounts:
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- name: wordpress-persistent-storage
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mountPath: /var/www/html
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volumes:
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- name: wordpress-persistent-storage
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persistentVolumeClaim:
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claimName: wp-pvc

‎examples/acm-terraform-blog-part1/terraform/gke.tf‎

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/**
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* Copyright 2021 Google LLC
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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module "enabled_google_apis" {
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source = "terraform-google-modules/project-factory/google//modules/project_services"
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version = "~> 10.0"
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project_id = var.project
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disable_services_on_destroy = false
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activate_apis = [
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"compute.googleapis.com",
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"container.googleapis.com",
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"gkehub.googleapis.com",
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"anthosconfigmanagement.googleapis.com"
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]
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}
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module "gke" {
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source = "terraform-google-modules/kubernetes-engine/google"
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version = "~> 16.0"
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project_id = module.enabled_google_apis.project_id
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name = "sfl-acm-part1"
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region = var.region
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zones = [var.zone]
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initial_node_count = 4
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network = "default"
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subnetwork = "default"
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ip_range_pods = ""
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ip_range_services = ""
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}

‎examples/acm-terraform-blog-part1/terraform/main.tf‎

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/**
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* Copyright 2021 Google LLC
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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resource "google_gke_hub_membership" "membership" {
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provider = google-beta
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membership_id = "membership-hub"
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endpoint {
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gke_cluster {
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resource_link = "//container.googleapis.com/${module.gke.cluster_id}"
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}
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}
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}
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resource "google_gke_hub_feature" "configmanagement_acm_feature" {
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name = "configmanagement"
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location = "global"
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provider = google-beta
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}
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resource "google_gke_hub_feature_membership" "feature_member" {
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provider = google-beta
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location = "global"
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feature = "configmanagement"
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membership = google_gke_hub_membership.membership.membership_id
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configmanagement {
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version = "1.8.0"
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config_sync {
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source_format = "unstructured"
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git {
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sync_repo = var.sync_repo
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sync_branch = var.sync_branch
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policy_dir = var.policy_dir
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secret_type = "none"
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}
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}
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}
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depends_on = [
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google_gke_hub_feature.configmanagement_acm_feature
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]
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}

‎examples/acm-terraform-blog-part1/terraform/outputs.tf‎

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/**
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* Copyright 2021 Google LLC
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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output "cluster_location" {
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value = module.gke.location
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}
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output "cluster_name" {
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value = module.gke.name
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}

‎examples/acm-terraform-blog-part1/terraform/providers.tf‎

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/**
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* Copyright 2021 Google LLC
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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terraform {
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required_providers {
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google-beta = {
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source = "hashicorp/google-beta"
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version = "3.73.0"
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}
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}
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}
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provider "google-beta" {
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project = var.project
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region = var.region
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zone = var.zone
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}

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