add gcp provider and generate addon (#245)

* add gcp provider and generate addon

Signed-off-by: Nicola115 <[email protected]>

* Update hack/addons/terraform/provider-GCP.yaml

Co-authored-by: Zheng Xi Zhou <[email protected]>

* Update hack/addons/terraform/provider-GCP.yaml

Co-authored-by: Zheng Xi Zhou <[email protected]>

Co-authored-by: Zheng Xi Zhou <[email protected]>

addons/terraform-gcp/metadata.yaml

@@ -0,0 +1,16 @@
+name: terraform-gcp
+version: 1.0.0
+description: Kubernetes Terraform Controller Provider for Google Cloud Platform
+url: https://github.com/oam-dev/terraform-controller
+
+tags:
+  - Terraform Controller Provider
+  - IaC
+  - Cloud Resources
+
+deployTo:
+  control_plane: true
+  runtime_cluster: false
+
+dependencies:
+  - name: terraform

addons/terraform-gcp/readme.md

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+# Addon terraform-gcp
+
+This addon contains Terraform provider for Google Cloud Platform.

addons/terraform-gcp/resources/account-creds.cue

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+import "strings"
+
+output: {
+	type: "raw"
+	properties: {
+		apiVersion: "v1"
+		kind:       "Secret"
+		metadata: {
+			name:      "gcp-account-creds"
+			namespace: "vela-system"
+		}
+		type: "Opaque"
+		stringData: credentials: strings.Join([
+							"gcpCredentialsJSON: " + parameter.GOOGLE_CREDENTIALS,
+
+							"gcpProject: " + parameter.GOOGLE_PROJECT,
+						], "\n")
+	}
+}
+

addons/terraform-gcp/resources/parameter.cue

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+parameter: {
+	//+usage=Get gcpCredentialsJSON per this guide https://registry.terraform.io/providers/hashicorp/google/latest/docs/guides/getting_started#adding-credentials
+	GOOGLE_CREDENTIALS: *"" | string
+	//+usage=Get GOOGLE_REGION by picking one RegionId from Google Cloud region list https://cloud.google.com/compute/docs/regions-zones
+	GOOGLE_REGION: *"" | string
+	//+usage=Set gcpProject per this guide https://registry.terraform.io/providers/hashicorp/google/latest/docs/guides/getting_started#configuring-the-provider
+	GOOGLE_PROJECT: *"" | string
+}

addons/terraform-gcp/resources/provider.cue

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+output: {
+	type: "raw"
+	properties: {
+		apiVersion: "terraform.core.oam.dev/v1beta1"
+		kind:       "Provider"
+		metadata: {
+			name:      "gcp"
+			namespace: "default"
+		}
+		spec: {
+			provider: "gcp"
+			region:   parameter.GOOGLE_REGION
+			credentials: {
+				source: "Secret"
+				secretRef: {
+					namespace: "vela-system"
+					name:      "gcp-account-creds"
+					key:       "credentials"
+				}
+			}
+		}
+	}
+}

addons/terraform-gcp/template.yaml

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+apiVersion: core.oam.dev/v1beta1
+kind: Application
+metadata:
+  name: terraform-gcp
+  namespace: vela-system

hack/addons/terraform/provider-GCP.yaml

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+# provider name
+name: gcp
+
+# The Cloud name of the provider
+cloudName: Google Cloud Platform
+
+# When enabling a Terraform provider, these properties need to set for authentication. For Tencent Cloud,
+# name: Environment variable name when authenticating Terraform, like https://github.com/oam-dev/terraform-controller/blob/master/controllers/provider/credentials.go#L59
+# secretKey: Secret key when storing authentication information in a Kubernetes, like https://github.com/oam-dev/terraform-controller/blob/master/controllers/provider/credentials.go#L109.
+properties:
+  - name: GOOGLE_CREDENTIALS
+    secretKey: gcpCredentialsJSON
+    description: Get GOOGLE_CREDENTIALS per this guide https://registry.terraform.io/providers/hashicorp/google/latest/docs/guides/getting_started#adding-credentials
+  - name: GOOGLE_REGION
+    description: Get GOOGLE_REGION by picking one RegionId from Google Cloud region list https://cloud.google.com/compute/docs/regions-zones
+    isRegion: true
+  - name: GOOGLE_PROJECT
+    secretKey: gcpProject
+    description: Set GOOGLE_PROJECT per this guide https://registry.terraform.io/providers/hashicorp/google/latest/docs/guides/getting_started#configuring-the-provider