feat!: Change the default value of "monitoring_enable_managed_prometheus" var to null (#2188)

Author: legal90

README.md

@@ -206,7 +206,7 @@ Then perform the following commands on the root folder:
 | maintenance\_recurrence | Frequency of the recurring maintenance window in RFC5545 format. | `string` | `""` | no |
 | maintenance\_start\_time | Time window specified for daily or recurring maintenance operations in RFC3339 format | `string` | `"05:00"` | no |
 | master\_authorized\_networks | List of master authorized networks. If none are provided, disallow external access (except the cluster node IPs, which GKE automatically whitelists). | `list(object({ cidr_block = string, display_name = string }))` | `[]` | no |
-| monitoring\_enable\_managed\_prometheus | Configuration for Managed Service for Prometheus. Whether or not the managed collection is enabled. | `bool` | `false` | no |
+| monitoring\_enable\_managed\_prometheus | Configuration for Managed Service for Prometheus. Whether or not the managed collection is enabled. | `bool` | `null` | no |
 | monitoring\_enable\_observability\_metrics | Whether or not the advanced datapath metrics are enabled. | `bool` | `false` | no |
 | monitoring\_enable\_observability\_relay | Whether or not the advanced datapath relay is enabled. | `bool` | `false` | no |
 | monitoring\_enabled\_components | List of services to monitor: SYSTEM\_COMPONENTS, APISERVER, SCHEDULER, CONTROLLER\_MANAGER, STORAGE, HPA, POD, DAEMONSET, DEPLOYMENT, STATEFULSET, KUBELET, CADVISOR and DCGM. In beta provider, WORKLOADS is supported on top of those 12 values. (WORKLOADS is deprecated and removed in GKE 1.24.) KUBELET and CADVISOR are only supported in GKE 1.29.3-gke.1093000 and above. Empty list is default GKE configuration. | `list(string)` | `[]` | no |

autogen/main/cluster.tf.tmpl

@@ -107,7 +107,7 @@ resource "google_container_cluster" "primary" {
     {% if beta_cluster %}
     for_each = local.cluster_telemetry_type_is_set || local.logmon_config_is_set ? [1] : []
     {% else %}
-    for_each = local.logmon_config_is_set || local.logmon_config_is_set ? [1] : []
+    for_each = local.logmon_config_is_set ? [1] : []
     {% endif %}
   {% else %}
     for_each = length(var.monitoring_enabled_components) > 0 ? [1] : []
@@ -116,7 +116,7 @@ resource "google_container_cluster" "primary" {
       enable_components = var.monitoring_enabled_components
     {% if autopilot_cluster != true %}
       managed_prometheus {
-        enabled = var.monitoring_enable_managed_prometheus
+        enabled = var.monitoring_enable_managed_prometheus == null ? false : var.monitoring_enable_managed_prometheus
       }
       advanced_datapath_observability_config {
         enable_metrics = var.monitoring_enable_observability_metrics

autogen/main/main.tf.tmpl

@@ -106,7 +106,7 @@ locals {
     provider = null
   }]
   cluster_gce_pd_csi_config    = var.gce_pd_csi_driver ? [{ enabled = true }] : [{ enabled = false }]
-  logmon_config_is_set         = length(var.logging_enabled_components) > 0 || length(var.monitoring_enabled_components) > 0 || var.monitoring_enable_managed_prometheus
+  logmon_config_is_set         = length(var.logging_enabled_components) > 0 || length(var.monitoring_enabled_components) > 0 || var.monitoring_enable_managed_prometheus != null
 {% endif %}
   gke_backup_agent_config      = var.gke_backup_agent_config ? [{ enabled = true }] : [{ enabled = false }]
   gcs_fuse_csi_driver_config   = var.gcs_fuse_csi_driver ? [{ enabled = true }] : []

autogen/main/variables.tf.tmpl

@@ -914,7 +914,7 @@ variable "logging_enabled_components" {
 variable "monitoring_enable_managed_prometheus" {
   type        = bool
   description = "Configuration for Managed Service for Prometheus. Whether or not the managed collection is enabled."
-  default     = false
+  default     = null
 }
 
 variable "monitoring_enable_observability_metrics" {

cluster.tf

@@ -89,11 +89,11 @@ resource "google_container_cluster" "primary" {
   }
 
   dynamic "monitoring_config" {
-    for_each = local.logmon_config_is_set || local.logmon_config_is_set ? [1] : []
+    for_each = local.logmon_config_is_set ? [1] : []
     content {
       enable_components = var.monitoring_enabled_components
       managed_prometheus {
-        enabled = var.monitoring_enable_managed_prometheus
+        enabled = var.monitoring_enable_managed_prometheus == null ? false : var.monitoring_enable_managed_prometheus
       }
       advanced_datapath_observability_config {
         enable_metrics = var.monitoring_enable_observability_metrics

main.tf

@@ -89,7 +89,7 @@ locals {
     provider = null
   }]
   cluster_gce_pd_csi_config  = var.gce_pd_csi_driver ? [{ enabled = true }] : [{ enabled = false }]
-  logmon_config_is_set       = length(var.logging_enabled_components) > 0 || length(var.monitoring_enabled_components) > 0 || var.monitoring_enable_managed_prometheus
+  logmon_config_is_set       = length(var.logging_enabled_components) > 0 || length(var.monitoring_enabled_components) > 0 || var.monitoring_enable_managed_prometheus != null
   gke_backup_agent_config    = var.gke_backup_agent_config ? [{ enabled = true }] : [{ enabled = false }]
   gcs_fuse_csi_driver_config = var.gcs_fuse_csi_driver ? [{ enabled = true }] : []
   stateful_ha_config         = var.stateful_ha ? [{ enabled = true }] : []

modules/beta-private-cluster-update-variant/README.md

@@ -252,7 +252,7 @@ Then perform the following commands on the root folder:
 | master\_authorized\_networks | List of master authorized networks. If none are provided, disallow external access (except the cluster node IPs, which GKE automatically whitelists). | `list(object({ cidr_block = string, display_name = string }))` | `[]` | no |
 | master\_global\_access\_enabled | Whether the cluster master is accessible globally (from any region) or only within the same region as the private endpoint. | `bool` | `true` | no |
 | master\_ipv4\_cidr\_block | The IP range in CIDR notation to use for the hosted master network. Optional for Autopilot clusters. | `string` | `"10.0.0.0/28"` | no |
-| monitoring\_enable\_managed\_prometheus | Configuration for Managed Service for Prometheus. Whether or not the managed collection is enabled. | `bool` | `false` | no |
+| monitoring\_enable\_managed\_prometheus | Configuration for Managed Service for Prometheus. Whether or not the managed collection is enabled. | `bool` | `null` | no |
 | monitoring\_enable\_observability\_metrics | Whether or not the advanced datapath metrics are enabled. | `bool` | `false` | no |
 | monitoring\_enable\_observability\_relay | Whether or not the advanced datapath relay is enabled. | `bool` | `false` | no |
 | monitoring\_enabled\_components | List of services to monitor: SYSTEM\_COMPONENTS, APISERVER, SCHEDULER, CONTROLLER\_MANAGER, STORAGE, HPA, POD, DAEMONSET, DEPLOYMENT, STATEFULSET, KUBELET, CADVISOR and DCGM. In beta provider, WORKLOADS is supported on top of those 12 values. (WORKLOADS is deprecated and removed in GKE 1.24.) KUBELET and CADVISOR are only supported in GKE 1.29.3-gke.1093000 and above. Empty list is default GKE configuration. | `list(string)` | `[]` | no |

modules/beta-private-cluster-update-variant/cluster.tf

@@ -99,7 +99,7 @@ resource "google_container_cluster" "primary" {
     content {
       enable_components = var.monitoring_enabled_components
       managed_prometheus {
-        enabled = var.monitoring_enable_managed_prometheus
+        enabled = var.monitoring_enable_managed_prometheus == null ? false : var.monitoring_enable_managed_prometheus
       }
       advanced_datapath_observability_config {
         enable_metrics = var.monitoring_enable_observability_metrics

modules/beta-private-cluster-update-variant/main.tf

@@ -89,7 +89,7 @@ locals {
     provider = null
   }]
   cluster_gce_pd_csi_config  = var.gce_pd_csi_driver ? [{ enabled = true }] : [{ enabled = false }]
-  logmon_config_is_set       = length(var.logging_enabled_components) > 0 || length(var.monitoring_enabled_components) > 0 || var.monitoring_enable_managed_prometheus
+  logmon_config_is_set       = length(var.logging_enabled_components) > 0 || length(var.monitoring_enabled_components) > 0 || var.monitoring_enable_managed_prometheus != null
   gke_backup_agent_config    = var.gke_backup_agent_config ? [{ enabled = true }] : [{ enabled = false }]
   gcs_fuse_csi_driver_config = var.gcs_fuse_csi_driver ? [{ enabled = true }] : []
   stateful_ha_config         = var.stateful_ha ? [{ enabled = true }] : []

modules/beta-private-cluster-update-variant/variables.tf

@@ -868,7 +868,7 @@ variable "logging_enabled_components" {
 variable "monitoring_enable_managed_prometheus" {
   type        = bool
   description = "Configuration for Managed Service for Prometheus. Whether or not the managed collection is enabled."
-  default     = false
+  default     = null
 }
 
 variable "monitoring_enable_observability_metrics" {