chore: add connection-metadata to Redis Cluster's metadata.yaml for ADC compliance (#310)

Co-authored-by: Sangini Garg <[email protected]>
Co-authored-by: abhishek kumar tiwari <[email protected]>

Author: 3 people

modules/redis-cluster/README.md

@@ -61,6 +61,7 @@ Check the [example/](https://github.com/terraform-google-modules/terraform-googl
 |------|-------------|
 | apphub\_service\_uri | Service URI in CAIS style to be used by Apphub. |
 | discovery\_endpoints | Endpoints created on each given network, for Redis clients to connect to the cluster. Currently only one endpoint is supported |
+| env\_vars | Environment variables for Redis cluster connection, including address and port. |
 | id | The redis cluster instance ID |
 | psc\_connections | PSC connections for discovery of the cluster topology and accessing the cluster |
 | psc\_service\_attachments | The PSC service attachments of the cluster |

modules/redis-cluster/metadata.display.yaml

@@ -31,6 +31,9 @@ spec:
         authorization_mode:
           name: authorization_mode
           title: Authorization Mode
+          altDefaults:
+            - type: ALTERNATE_TYPE_DC
+              value: AUTH_MODE_IAM_AUTH
         cluster_role:
           name: cluster_role
           title: Cluster Role

modules/redis-cluster/metadata.yaml

@@ -82,6 +82,12 @@ spec:
         description: List of consumer network where the network address of the discovery endpoint will be reserved, in the form of projects/{network_project_id_or_number}/global/networks/{network_id}. Currently, only one item is supported
         varType: list(string)
         required: true
+        connections:
+          - source:
+              source: github.com/terraform-google-modules/terraform-google-network//modules/vpc
+              version: ">= 9.1.0"
+            spec:
+              outputExpr: network_id
       - name: service_connection_policies
         description: The Service Connection Policies to create
         varType: |-
@@ -174,6 +180,12 @@ spec:
                 - list
                 - - object
                   - network: string
+      - name: env_vars
+        description: Environment variables for Redis cluster connection, including address and port.
+        type:
+          - object
+          - REDIS_CLUSTER_HOST: string
+            REDIS_CLUSTER_PORT: string
       - name: id
         description: The redis cluster instance ID
         type: string

modules/redis-cluster/outputs.tf

@@ -39,6 +39,14 @@ output "redis_cluster" {
   value       = google_redis_cluster.redis_cluster
 }
 
+output "env_vars" {
+  description = "Environment variables for Redis cluster connection, including address and port."
+  value = {
+    "REDIS_CLUSTER_HOST" = google_redis_cluster.redis_cluster.discovery_endpoints[0].address
+    "REDIS_CLUSTER_PORT" = tostring(google_redis_cluster.redis_cluster.discovery_endpoints[0].port)
+  }
+}
+
 output "apphub_service_uri" {
   value = {
     service_uri = "//redis.googleapis.com/${google_redis_cluster.redis_cluster.id}"