$ gcloud projects add-iam-policy-binding <PROJECT_ID> \
  --member serviceAccount:terraform@<PROJECT_ID>.iam.gserviceaccount.com \
  --role roles/iam.serviceAccountUser

$ gcloud projects add-iam-policy-binding <PROJECT_ID> \
  --member serviceAccount:terraform@<PROJECT_ID>.iam.gserviceaccount.com \
  --role roles/compute.viewer

$ gcloud projects add-iam-policy-binding <PROJECT_ID> \
  --member serviceAccount:terraform@<PROJECT_ID>.iam.gserviceaccount.com \
  --role roles/storage.admin

$ gcloud iam service-accounts keys create account.json \
--iam-account terraform@<PROJECT_ID>.iam.gserviceaccount.com

provider "google" {
  credentials = file("account.json")
  project = "<PROJECT_ID>"
  region = "<REGION>"
}

resource "google_container_cluster" "gke-cluster" {
  name = "<CLUSTER_NAME>"
  location = "<LOCATION>"
  remove_default_node_pool = true
  # In regional cluster (location is region, not zone) 
  # this is a number of nodes per zone 
  initial_node_count = 1
}

resource "google_container_node_pool" "preemptible_node_pool" {
  name = "<NODES_POOL_NAME>"
  location = "<LOCATION>"
  cluster = google_container_cluster.gke-cluster.name
  # In regional cluster (location is region, not zone) 
  # this is a number of nodes per zone
  node_count = 1

  node_config {
    preemptible = true
    machine_type = "n1-standard-1"
    oauth_scopes = [
      "storage-ro",
      "logging-write",
      "monitoring"
    ]
  }
}

$ gsutil versioning get gs://<BUCKET_NAME>
gs://<BUCKET_NAME>: Suspended

$ gsutil versioning set on gs://<BUCKET_NAME>

$ gsutil versioning get gs://<BUCKET_NAME>
gs://<BUCKET_NAME>: Enabled

{{- define "iris-rest.name" -}}
{{- default .Chart.Name .Values.nameOverride | trunc 63 | trimSuffix "-" -}}
{{- end -}}

{{/*
Create chart name and version as used by the chart label.
*/}}
{{- define "iris-rest.chart" -}}
{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" -}}
{{- end -}}

replicaCount: 1

strategy: |
  type: Recreate

image:
  repository: eu.gcr.io/iris-rest
  tag: v1

webPort:
  name: web
  value: 52773

service:
  enabled: true
  name: iris-rest
  type: LoadBalancer
  loadBalancerIP: ""
  ports:
    web:
      port: 52773
      targetPort: 52773
      protocol: TCP

orbs:
  gcp-gcr: circleci/gcp-gcr@0.6.1

jobs:
  terraform:
    docker:
    # Terraform image version should be the same as when
    # you run terraform before from the local machine
      - image: hashicorp/terraform:0.12.17
    steps:
      - checkout
      - run:
          name: Create Service Account key file from environment variable
          working_directory: terraform
          command: echo ${TF_SERVICE_ACCOUNT_KEY} > account.json
      - run:
          name: Show Terraform version
          command: terraform version
      - run:
          name: Download required Terraform plugins
          working_directory: terraform
          command: terraform init
      - run:
          name: Validate Terraform configuration
          working_directory: terraform
          command: terraform validate
      - run:
          name: Create Terraform plan
          working_directory: terraform
          command: terraform plan -out /tmp/tf.plan
      - run:
          name: Run Terraform plan
          working_directory: terraform
          command: terraform apply /tmp/tf.plan
  k8s_deploy:
    docker:
      - image: kiwigrid/gcloud-kubectl-helm:3.0.1-272.0.0-218
    steps:
      - checkout
      - run:
          name: Authorize gcloud on GKE
          working_directory: helm
          command: |
            echo ${GCLOUD_SERVICE_KEY} > gcloud-service-key.json
            gcloud auth activate-service-account --key-file=gcloud-service-key.json
            gcloud container clusters get-credentials ${GKE_CLUSTER_NAME} --zone ${GOOGLE_COMPUTE_ZONE} --project ${GOOGLE_PROJECT_ID}
      - run:
          name: Wait a little until k8s worker nodes up
          command: sleep 30 # It’s a place for improvement
      - run:
          name: Create IRIS namespace if it doesn't exist
          command: kubectl get ns iris || kubectl create ns iris
      - run:
          name: Run Helm release deployment
          working_directory: helm
          command: |
            helm upgrade iris-rest \
              --install \
              . \
              --namespace iris \
              --wait \
              --timeout 300s \
              --atomic \
              --set image.repository=eu.gcr.io/${GOOGLE_PROJECT_ID}/iris-rest \
              --set image.tag=${CIRCLE_SHA1}
      - run:
          name: Check Helm release status
          command: helm list --all-namespaces --all
      - run:
          name: Check Kubernetes resources status
          command: |
            kubectl -n iris get pods
            echo
            kubectl -n iris get services
workflows:
  main:
    jobs:
      - terraform
      - gcp-gcr/build-and-push-image:
          dockerfile: Dockerfile
          gcloud-service-key: GCLOUD_SERVICE_KEY
          google-compute-zone: GOOGLE_COMPUTE_ZONE
          google-project-id: GOOGLE_PROJECT_ID
          registry-url: eu.gcr.io
          image: iris-rest
          path: .
          tag: ${CIRCLE_SHA1}
      - k8s_deploy:
          requires:
            - terraform
            - gcp-gcr/build-and-push-image

$ kubectl -n iris get svc
NAME        TYPE                     CLUSTER-IP     EXTERNAL-IP   PORT(S)                     AGE
Iris-rest    LoadBalancer  10.23.249.42    34.76.130.11    52773:31603/TCP   53s

$ curl -XPOST -H "Content-Type: application/json" -u _system:SYS 34.76.130.11:52773/person/ -d '{"Name":"John Dou"}'

$ curl -XGET -u _system:SYS 34.76.130.11:52773/person/all
[{"Name":"John Dou"},]