Adding sample for flex reservation

Author: raushan2016

gke/standard/zonal/reservation/main.tf

@@ -106,3 +106,26 @@ resource "google_container_node_pool" "specific_node_pool" {
   ]
 }
 # [END gke_standard_zonal_reservation_specific_node_pool]
+
+# [START gke_standard_zonal_reservation_flex]
+resource "google_container_node_pool" "reservation_flex" {
+  name     = "gke_standard_zonal_reservation_flex"
+  cluster  = google_container_cluster.default.name
+  location = google_container_cluster.default.location
+
+  initial_node_count = 0
+  autoscaling {
+    total_min_node_count = 0
+    total_max_node_count = 1
+  }
+  node_config {
+    machine_type = "e2-medium"
+    flex_start = true
+	  max_run_duration = "604800s"
+
+    reservation_affinity {
+      consume_reservation_type = "NO_RESERVATION"
+    }
+  }
+}
+# [END gke_standard_zonal_reservation_flex]