Merge pull request #168 from bcgov/chore-migration

167: Remove dependency on Terraform Cloud and cas-shelf

.gitignore

@@ -150,5 +150,7 @@ helm/**/charts/**/*
 .vscode/settings.json
 .scratch
 
+# Terraform
+.terraform
 
 

helm/cas-airflow/.helmignore

@@ -0,0 +1,31 @@
+# Patterns to ignore when building packages.
+# This supports shell glob matching, relative path matching, and
+# negation (prefixed with !). Only one pattern per line.
+.DS_Store
+# Common VCS dirs
+.git/
+.gitignore
+.bzr/
+.bzrignore
+.hg/
+.hgignore
+.svn/
+# Common backup files
+*.swp
+*.bak
+*.tmp
+*.orig
+*~
+# Various IDEs
+.project
+.idea/
+*.tmproj
+.vscode/
+
+# Terraform files from local and migration runs
+.terraform/
+*.tfstate
+*.tfvars
+.terraform.lock.hcl
+credentials.json
+terraform/*.sh

helm/cas-airflow/templates/jobs/terraform-apply.yaml

@@ -0,0 +1,77 @@
+apiVersion: batch/v1
+kind: Job
+metadata:
+  name: terraform-apply
+  labels:
+    component: backend
+  namespace: {{ .Release.Namespace }}
+  annotations:
+    "helm.sh/hook": pre-install, pre-upgrade
+spec:
+  backoffLimit: 0
+  activeDeadlineSeconds: 900
+  template:
+    spec:
+      serviceAccountName: "terraform-kubernetes-service-account"
+      containers:
+        - name: terraform-apply
+          resources: {{ toYaml .Values.devops.resources | nindent 12 }}
+          image: "{{ .Values.devops.image.repository }}:{{ .Values.devops.sourceRepoImageTag | default .Values.devops.image.tag }}"
+          imagePullPolicy: {{ .Values.devops.image.pullPolicy }}
+          volumeMounts:
+            - mountPath: /etc/gcp
+              name: service-account-credentials-volume
+              readOnly: True
+            - mountPath: /etc/tf
+              name: terraform-backend-config-volume
+              readOnly: True
+            - name: tf-cache
+              mountPath: /working
+              readOnly: False
+            - name: terraform-modules
+              mountPath: /terraform
+              readOnly: False
+          env:
+            - name: TF_VAR_project_id
+              valueFrom:
+                secretKeyRef:
+                  name: gcp-credentials-secret
+                  key: gcp_project_id
+            - name: TF_VAR_openshift_namespace
+              value: {{ .Release.Namespace | quote }}
+            - name: TF_VAR_apps
+              value: '["airflow-backups", "airflow-logs"]'
+            - name: kubernetes_host
+              value: "https://api.silver.devops.gov.bc.ca:6443"
+            - name: GOOGLE_APPLICATION_CREDENTIALS
+              value: "/etc/gcp/credentials.json"
+          # Terraform was having an issue pulling kubernetes_host in as a TF_VAR, so we add it as a attribute to the command
+          command:
+            - /bin/sh
+            - -c
+            - |
+              set -euo pipefail;
+              cp -r /terraform/. /working;
+              cd working;
+              export TF_VAR_kubernetes_token=$( cat /var/run/secrets/kubernetes.io/serviceaccount/token );
+              terraform init -backend-config=/etc/tf/gcs.tfbackend;
+              terraform apply -var="kubernetes_host=$kubernetes_host" -auto-approve;
+      restartPolicy: Never
+      volumes:
+        - name: service-account-credentials-volume
+          secret:
+            secretName: gcp-credentials-secret
+            items:
+              - key: sa_json
+                path: credentials.json
+        - name: terraform-backend-config-volume
+          secret:
+            secretName: gcp-credentials-secret
+            items:
+              - key: tf_backend
+                path: gcs.tfbackend
+        - name: tf-cache
+          emptyDir: {}
+        - name: terraform-modules
+          configMap:
+            name: terraform-modules

helm/cas-airflow/templates/jobs/terraform-modules.yaml

@@ -0,0 +1,14 @@
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: terraform-modules
+  namespace: {{ .Release.Namespace }}
+  # Because terraform-apply.yaml is pre-install, pre-upgrade, this configmap needs to be in place before it
+  annotations:
+    "helm.sh/hook": pre-install, pre-upgrade
+    "helm.sh/hook-weight": "-10"
+binaryData:
+{{- range $path, $data := .Files.Glob "terraform/**.tf" }}
+{{ $path | base | indent 2 }}: >-
+{{- $data | toString | b64enc | nindent 4 }}
+{{ end }}

helm/cas-airflow/templates/jobs/terraform-service-account.yaml

@@ -0,0 +1,35 @@
+apiVersion: rbac.authorization.k8s.io/v1
+kind: Role
+metadata:
+  name: "terraform-secret-admin"
+  namespace: {{ .Release.Namespace }}
+  annotations:
+    "helm.sh/hook": pre-install, pre-upgrade
+rules:
+- apiGroups: [""]
+  resources: ["secrets"]
+  verbs: ["create", "delete", "deletecollection", "get", "list", "patch", "update", "watch"]
+---
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: "terraform-kubernetes-service-account"
+  namespace: {{ .Release.Namespace }}
+  annotations:
+    "helm.sh/hook": pre-install, pre-upgrade
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: RoleBinding
+metadata:
+  name: "terraform-kubernetes-service-account-secret-admin-binding"
+  namespace: {{ .Release.Namespace }}
+  annotations:
+    "helm.sh/hook": pre-install, pre-upgrade
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: Role
+  name: "terraform-secret-admin"
+subjects:
+- kind: ServiceAccount
+  name: "terraform-kubernetes-service-account"
+  namespace: {{ .Release.Namespace }}

helm/cas-airflow/terraform/main.tf

@@ -0,0 +1,100 @@
+# Terraform workspace configuration. To apply changes to this file, use `make create_workspace`
+
+terraform {
+  required_version = ">=1.4.6"
+
+  required_providers {
+    kubernetes = {
+      source  = "hashicorp/kubernetes"
+      version = "~> 2.23"
+    }
+    google = {
+      source = "hashicorp/google"
+      version = "~> 5.2.0"
+    }
+  }
+
+    backend "gcs" {}
+}
+
+# Configure OCP infrastructure to setup the host and authentication token
+provider "kubernetes" {
+  host             = var.kubernetes_host
+  token            = var.kubernetes_token
+}
+
+# Configure GCP infrastructure to setup the credentials, default project and location (zone and/or region) for your resources
+provider "google" {
+  project     = var.project_id
+  region      = local.region
+}
+
+# Create GCS buckets
+resource "google_storage_bucket" "bucket" {
+  for_each = { for v in var.apps : v => v }
+  name = "${var.openshift_namespace}-${each.value}"
+  location = local.region
+}
+
+# Create GCP service accounts for each GCS bucket
+resource "google_service_account" "account" {
+  for_each     = { for v in var.apps : v => v }
+  account_id   = "sa-${var.openshift_namespace}-${each.value}"
+  display_name = "${var.openshift_namespace}-${each.value} Service Account"
+  depends_on   = [google_storage_bucket.bucket]
+}
+
+# Assign Storage Admin role for the corresponding service accounts
+resource "google_storage_bucket_iam_member" "admin" {
+  for_each   = { for v in var.apps : v => v }
+  bucket     = "${var.openshift_namespace}-${each.value}"
+  role       = "roles/storage.admin"
+  member     = "serviceAccount:${google_service_account.account[each.key].email}"
+  depends_on = [google_service_account.account]
+}
+
+# Create viewer GCP service accounts for each GCS bucket
+resource "google_service_account" "viewer_account" {
+  for_each     = { for v in var.apps : v => v }
+  account_id   = "ro-${var.openshift_namespace}-${each.value}"
+  display_name = "${var.openshift_namespace}-${each.value} Viewer Service Account"
+  depends_on   = [google_storage_bucket.bucket]
+}
+
+# Assign (manually created) Storage Viewer role for the corresponding service accounts
+resource "google_storage_bucket_iam_member" "viewer" {
+  for_each   = { for v in var.apps : v => v }
+  bucket     = "${var.openshift_namespace}-${each.value}"
+  role       = "projects/${var.project_id}/roles/${var.iam_storage_role_template_id}"
+  member     = "serviceAccount:${google_service_account.viewer_account[each.key].email}"
+  depends_on = [google_service_account.viewer_account]
+}
+
+# Create keys for the service accounts
+resource "google_service_account_key" "key" {
+  for_each           = { for v in var.apps : v => v }
+  service_account_id = google_service_account.account[each.key].name
+}
+
+# Create keys for the viewer service accounts
+resource "google_service_account_key" "viewer_key" {
+  for_each           = { for v in var.apps : v => v }
+  service_account_id = google_service_account.viewer_account[each.key].name
+}
+
+resource "kubernetes_secret" "secret_sa" {
+  for_each = { for v in var.apps : v => v }
+  metadata {
+    name      = "gcp-${var.openshift_namespace}-${each.value}-service-account-key"
+    namespace = "${var.openshift_namespace}"
+    labels = {
+      created-by = "Terraform"
+    }
+  }
+
+  data = {
+    "bucket_name"      = "${var.openshift_namespace}-${each.value}"
+    "credentials.json" = base64decode(google_service_account_key.key[each.key].private_key)
+    "viewer_credentials.json" = base64decode(google_service_account_key.viewer_key[each.key].private_key)
+  }
+}

helm/cas-airflow/terraform/variables.tf

@@ -0,0 +1,33 @@
+# Since variables could be overridden via environment variables, use local values to define immutable values
+locals {
+  # The GCP region to create things in. https://cloud.google.com/compute/docs/regions-zones"
+  region = "northamerica-northeast1" # Montreal
+}
+
+variable "project_id" {
+  description = "The ID of the GCP project"
+}
+
+variable "kubernetes_host" {
+  description = "The hostname of the OCP cluster"
+}
+
+variable "kubernetes_token" {
+  description = "The authentication token of the OCP cluster"
+}
+
+variable "apps" {
+  type = list(string)
+  description = "The list of app names for the OCP project in a namespace"
+}
+
+variable "openshift_namespace" {
+  type = string
+  description = "The OCP project namespace"
+}
+
+variable "iam_storage_role_template_id" {
+  type = string
+  description = "ID for a custom IAM role template we manually created in GCP for Storage Viewers"
+  default = "casStorageViewer"
+}

helm/cas-airflow/values.yaml

@@ -212,3 +212,17 @@ cas-postgres:
   namespace: ~
   gcs:
     bucketSuffix: ~
+
+devops:
+  image:
+    repository: hashicorp/terraform
+    pullPolicy: Always
+    tag: "1.4.6"
+
+  resources:
+    limits:
+      cpu: 1000m
+      memory: 512Mi
+    requests:
+      cpu: 100m
+      memory: 64Mi