Upgrade Examples and tests to use Helm 3

.circleci/config.yml

@@ -1,15 +1,14 @@
 defaults: &defaults
   machine: true
   environment:
-    GRUNTWORK_INSTALLER_VERSION: v0.0.21
+    GRUNTWORK_INSTALLER_VERSION: v0.0.23
     TERRATEST_LOG_PARSER_VERSION: v0.13.13
-    KUBERGRUNT_VERSION: v0.3.9
-    HELM_VERSION: v2.11.0
-    MODULE_CI_VERSION: v0.13.3
-    TERRAFORM_VERSION: 0.12.7
+    HELM_VERSION: v3.1.2
+    MODULE_CI_VERSION: v0.18.4
+    TERRAFORM_VERSION: 0.12.20
     TERRAGRUNT_VERSION: NONE
     PACKER_VERSION: NONE
-    GOLANG_VERSION: 1.11.2
+    GOLANG_VERSION: 1.13.8
     K8S_VERSION: v1.10.0
     KUBECONFIG: /home/circleci/.kube/config
 
@@ -24,9 +23,8 @@ install_gruntwork_utils: &install_gruntwork_utils
       --terraform-version ${TERRAFORM_VERSION} \
       --terragrunt-version ${TERRAGRUNT_VERSION} \
       --packer-version ${PACKER_VERSION} \
-      --use-go-dep \
       --go-version ${GOLANG_VERSION} \
-      --go-src-path test
+      --go-src-path ./test/
 
 install_helm_client: &install_helm_client
   name: install helm client
@@ -45,16 +43,16 @@ jobs:
       - checkout
       - restore_cache:
           keys:
-          - dep-v1-{{ checksum "test/Gopkg.lock" }}
+            - gomod-{{ checksum "test/go.sum" }}
 
       # Install gruntwork utilities
       - run:
           <<: *install_gruntwork_utils
 
       - save_cache:
-          key: dep-v1-{{ checksum "test/Gopkg.lock" }}
+          key: gomod-{{ checksum "test/go.sum" }}
           paths:
-          - ./test/vendor
+            - $HOME/go/src/
 
       # Fail the build if the pre-commit hooks don't pass. Note: if you run pre-commit install locally, these hooks will
       # execute automatically every time before you commit, ensuring the build never fails at this step!
@@ -87,11 +85,6 @@ jobs:
     - run:
         <<: *install_helm_client
 
-    # Install kubergrunt
-    - run:
-        name: Install kubergrunt
-        command: gruntwork-install --binary-name "kubergrunt" --repo "https://github.com/gruntwork-io/kubergrunt" --tag "${KUBERGRUNT_VERSION}"
-
     - run:
         name: update gcloud
         command: |

README.md

@@ -9,16 +9,16 @@ using [Google Kubernetes Engine (GKE)](https://cloud.google.com/kubernetes-engin
 
 ## Quickstart
 
-If you want to quickly spin up a GKE Private Cluster with Tiller, you can run the example that is in the root of this
-repo. Check out the [gke-private-tiller example documentation](https://github.com/gruntwork-io/terraform-google-gke/blob/master/examples/gke-private-tiller)
+If you want to quickly spin up a GKE Public Cluster, you can run the example that is in the root of this
+repo. Check out the [gke-basic-helm example documentation](https://github.com/gruntwork-io/terraform-google-gke/blob/master/examples/gke-basic-helm)
 for instructions.
 
 ## What's in this repo
 
 This repo has the following folder structure:
 
 * [root](https://github.com/gruntwork-io/terraform-google-gke/tree/master): The root folder contains an example of how
-  to deploy a GKE Private Cluster with Tiller. See [gke-private-tiller](https://github.com/gruntwork-io/terraform-google-gke/blob/master/examples/gke-private-tiller)
+  to deploy a GKE Public Cluster with and an example chart with [Helm](https://helm.sh/). See [gke-basic-helm](https://github.com/gruntwork-io/terraform-google-gke/blob/master/examples/gke-basic-helm)
   for the documentation.
 
 * [modules](https://github.com/gruntwork-io/terraform-google-gke/tree/master/modules): This folder contains the

examples/gke-basic-helm/README.md

@@ -0,0 +1,88 @@
+# GKE Basic Helm Example
+
+The root folder contains an example of how to deploy a GKE Public Cluster with an example chart 
+with [Helm](https://helm.sh/). 
+
+## Overview
+
+In this guide we will walk through the steps necessary to get up and running with GKE and Helm. Here are the steps:
+
+1. [Install the necessary tools](#installing-necessary-tools)
+1. [Apply the Terraform code](#apply-the-terraform-code)
+1. [Verify the Deployed Chart](#verify-the-deployed-chart)
+1. [Destroy the Deployed Resources](#destroy-the-deployed-resources)
+
+## Installing necessary tools
+
+In addition to `terraform`, this example relies on `gcloud` and `kubectl` and `helm` tools to manage the cluster.
+
+This means that your system needs to be configured to be able to find `terraform`, `gcloud`, `kubectl` and `helm`
+client utilities on the system `PATH`. Here are the installation guides for each tool:
+
+1. [`gcloud`](https://cloud.google.com/sdk/gcloud/)
+1. [`kubectl`](https://kubernetes.io/docs/tasks/tools/install-kubectl/)
+1. [`terraform`](https://learn.hashicorp.com/terraform/getting-started/install.html)
+1. [`helm`](https://docs.helm.sh/using_helm/#installing-helm) (Minimum version v3.0)
+
+Make sure the binaries are discoverable in your `PATH` variable. See [this Stack Overflow
+post](https://stackoverflow.com/questions/14637979/how-to-permanently-set-path-on-linux-unix) for instructions on
+setting up your `PATH` on Unix, and [this
+post](https://stackoverflow.com/questions/1618280/where-can-i-set-path-to-make-exe-on-windows) for instructions on
+Windows.
+
+## Apply the Terraform Code
+
+Now that all the prerequisite tools are installed, we are ready to deploy the GKE cluster!
+
+1. If you haven't already, clone this repo:
+   - `git clone https://github.com/gruntwork-io/terraform-google-gke.git`
+1. Make sure you are in the `gke-basic-helm` example folder:
+   - `cd examples/gke-basic-helm`
+1. Fill in the required variables in `variables.tf` based on your needs
+1. Authenticate to GCP:
+   - `gcloud auth login`
+   - `gcloud auth application-default login`
+1. Initialize terraform:
+   - `terraform init`
+1. Check the terraform plan:
+   - `terraform plan`
+1. Apply the terraform code:
+   - `terraform apply`
+
+At the end of the `terraform apply`, you should now have a working GKE cluster and `kubectl` context configured.
+So let's verify that in the next step!
+
+## Verify the Deployed Chart
+
+The example configures your `kubectl` context, so you can use `kubectl` and `helm` commands without further configuration. 
+
+To see the created resources, run the following commands:
+
+```
+❯ kubectl get deployments -n default
+NAME    READY   UP-TO-DATE   AVAILABLE   AGE
+nginx   1/1     1            1           92m
+
+❯ kubectl get service -n default
+NAME         TYPE           CLUSTER-IP   EXTERNAL-IP     PORT(S)                      AGE
+kubernetes   ClusterIP      10.2.0.1     <none>          443/TCP                      113m
+nginx        LoadBalancer   10.2.5.84    34.77.188.186   80:31588/TCP,443:31332/TCP   99m
+
+❯ kubectl get pods -n default
+NAME                     READY   STATUS    RESTARTS   AGE
+nginx-57454964b8-l4w9w   1/1     Running   0          99m
+```
+
+If you wish to access the deployed service, you use the `kubectl port-forward` command to forward a local port to the deployed service:
+
+```
+❯ kubectl port-forward deployment/nginx 8080:8080 -n default
+Forwarding from 127.0.0.1:8080 -> 8080
+Forwarding from [::1]:8080 -> 8080
+```
+
+You can now access the deployed service by opening your web browser to `http://localhost:8080`.
+
+## Destroy the deployed resources
+
+To destroy all resources created by the example, just run `terraform destroy`.