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Stackdriver Monitoring should be enabled

Default Severity: low

Explanation

StackDriver monitoring aggregates logs, events, and metrics from your Kubernetes environment on GKE to help you understand your application's behavior in production.

Possible Impact

Visibility will be reduced

Suggested Resolution

Enable StackDriver monitoring

Insecure Example

The following example will fail the google-gke-enable-stackdriver-monitoring check. 

 resource "google_service_account" "default" {
   account_id   = "service-account-id"
   display_name = "Service Account"
 }

 resource "google_container_cluster" "bad_example" {
   name     = "my-gke-cluster"
   location = "us-central1"

   # We can't create a cluster with no node pool defined, but we want to only use
   # separately managed node pools. So we create the smallest possible default
   # node pool and immediately delete it.
   remove_default_node_pool = true
   initial_node_count       = 1
   monitoring_service = "monitoring.googleapis.com"
 }

 resource "google_container_node_pool" "primary_preemptible_nodes" {
   name       = "my-node-pool"
   location   = "us-central1"
   cluster    = google_container_cluster.primary.name
   node_count = 1

   node_config {
     preemptible  = true
     machine_type = "e2-medium"

     # Google recommends custom service accounts that have cloud-platform scope and permissions granted via IAM Roles.
     service_account = google_service_account.default.email
     oauth_scopes    = [
       "https://www.googleapis.com/auth/cloud-platform"
     ]
   }
 }

Secure Example

The following example will pass the google-gke-enable-stackdriver-monitoring check. 

 resource "google_service_account" "default" {
   account_id   = "service-account-id"
   display_name = "Service Account"
 }

 resource "google_container_cluster" "good_example" {
   name     = "my-gke-cluster"
   location = "us-central1"

   # We can't create a cluster with no node pool defined, but we want to only use
   # separately managed node pools. So we create the smallest possible default
   # node pool and immediately delete it.
   remove_default_node_pool = true
   initial_node_count       = 1
   monitoring_service = "monitoring.googleapis.com/kubernetes"
 }

 resource "google_container_node_pool" "primary_preemptible_nodes" {
   name       = "my-node-pool"
   location   = "us-central1"
   cluster    = google_container_cluster.primary.name
   node_count = 1

   node_config {
     preemptible  = true
     machine_type = "e2-medium"

     # Google recommends custom service accounts that have cloud-platform scope and permissions granted via IAM Roles.
     service_account = google_service_account.default.email
     oauth_scopes    = [
       "https://www.googleapis.com/auth/cloud-platform"
     ]
   }
 }