doks: add node pool auto-scale fields (#307)

* doks: add auto_scale, min_nodes, max_nodes, and actual_node_count to node pool

* doks: add more auto-scaling node pool test coverage

* doks: documentation for auto-scaling node pools

* Handle case where a node pool is empty.

* Bump testClusterVersion to 1.15.5-do.0

digitalocean/datasource_digitalocean_kubernetes_cluster.go

@@ -71,11 +71,31 @@ func dataSourceDigitalOceanKubernetesCluster() *schema.Resource {
 							Computed: true,
 						},
 
+						"actual_node_count": {
+							Type:     schema.TypeInt,
+							Computed: true,
+						},
+
 						"node_count": {
 							Type:     schema.TypeInt,
 							Computed: true,
 						},
 
+						"auto_scale": {
+							Type:     schema.TypeBool,
+							Computed: true,
+						},
+
+						"min_nodes": {
+							Type:     schema.TypeInt,
+							Computed: true,
+						},
+
+						"max_nodes": {
+							Type:     schema.TypeInt,
+							Computed: true,
+						},
+
 						"tags": tagsSchema(),
 
 						"nodes": nodeSchema(),

digitalocean/resource_digitalocean_kubernetes_cluster.go

@@ -157,6 +157,9 @@ func resourceDigitalOceanKubernetesClusterCreate(d *schema.ResourceData, meta in
 			Size:      pool.Size,
 			Tags:      tags,
 			Count:     pool.Count,
+			AutoScale: pool.AutoScale,
+			MinNodes:  pool.MinNodes,
+			MaxNodes:  pool.MaxNodes,
 		}
 	}
 
@@ -216,10 +219,11 @@ func digitaloceanKubernetesClusterRead(client *godo.Client, cluster *godo.Kubern
 
 	// find the default node pool from all the pools in the cluster
 	// the default node pool has a custom tag k8s:default-node-pool
-	for _, p := range cluster.NodePools {
+	for i, p := range cluster.NodePools {
 		for _, t := range p.Tags {
 			if t == digitaloceanKubernetesDefaultNodePoolTag {
-				if err := d.Set("node_pool", flattenNodePool(p, cluster.Tags...)); err != nil {
+				keyPrefix := fmt.Sprintf("node_pool.%d.", i)
+				if err := d.Set("node_pool", flattenNodePool(d, keyPrefix, p, cluster.Tags...)); err != nil {
 					log.Printf("[DEBUG] Error setting node pool attributes: %s %#v", err, cluster.NodePools)
 				}
 			}
@@ -283,6 +287,11 @@ func resourceDigitalOceanKubernetesClusterUpdate(d *schema.ResourceData, meta in
 	oldPool := old.([]interface{})[0].(map[string]interface{})
 	newPool := new.([]interface{})[0].(map[string]interface{})
 
+	// If the node_count is unset, then remove it from the update map.
+	if _, ok := d.GetOk("node_pool.0.node_count"); !ok {
+		delete(newPool, "node_count")
+	}
+
 	// update the existing default pool
 	_, err := digitaloceanKubernetesNodePoolUpdate(client, newPool, d.Id(), oldPool["id"].(string), digitaloceanKubernetesDefaultNodePoolTag)
 	if err != nil {
@@ -453,3 +462,31 @@ func filterTags(tags []string) []string {
 
 	return filteredTags
 }
+
+func flattenNodePool(d *schema.ResourceData, keyPrefix string, pool *godo.KubernetesNodePool, parentTags ...string) []interface{} {
+	rawPool := map[string]interface{}{
+		"id":                pool.ID,
+		"name":              pool.Name,
+		"size":              pool.Size,
+		"actual_node_count": pool.Count,
+		"auto_scale":        pool.AutoScale,
+		"min_nodes":         pool.MinNodes,
+		"max_nodes":         pool.MaxNodes,
+	}
+
+	if pool.Tags != nil {
+		rawPool["tags"] = flattenTags(filterTags(pool.Tags))
+	}
+
+	if pool.Nodes != nil {
+		rawPool["nodes"] = flattenNodes(pool.Nodes)
+	}
+
+	// Assign a node_count only if it's been set explicitly, since it's
+	// optional and we don't want to update with a 0 if it's not set.
+	if _, ok := d.GetOk(keyPrefix + "node_count"); ok {
+		rawPool["node_count"] = pool.Count
+	}
+
+	return []interface{}{rawPool}
+}

digitalocean/resource_digitalocean_kubernetes_cluster_test.go

@@ -13,6 +13,8 @@ import (
 	"github.com/hashicorp/terraform-plugin-sdk/terraform"
 )
 
+const testClusterVersion = "1.15.5-do.0"
+
 func TestAccDigitalOceanKubernetesCluster_Basic(t *testing.T) {
 	t.Parallel()
 	rName := randomTestName()
@@ -29,7 +31,7 @@ func TestAccDigitalOceanKubernetesCluster_Basic(t *testing.T) {
 					testAccCheckDigitalOceanKubernetesClusterExists("digitalocean_kubernetes_cluster.foobar", &k8s),
 					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "name", rName),
 					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "region", "lon1"),
-					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "version", "1.15.4-do.0"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "version", testClusterVersion),
 					resource.TestCheckResourceAttrSet("digitalocean_kubernetes_cluster.foobar", "ipv4_address"),
 					resource.TestCheckResourceAttrSet("digitalocean_kubernetes_cluster.foobar", "cluster_subnet"),
 					resource.TestCheckResourceAttrSet("digitalocean_kubernetes_cluster.foobar", "service_subnet"),
@@ -43,6 +45,7 @@ func TestAccDigitalOceanKubernetesCluster_Basic(t *testing.T) {
 					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.#", "1"),
 					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.0.size", "s-1vcpu-2gb"),
 					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.0.node_count", "1"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.0.actual_node_count", "1"),
 					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.0.tags.#", "2"),
 					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.0.tags.2053932785", "one"), // Currently tags are being copied from parent this will fail
 					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.0.tags.298486374", "two"),  // requires API update
@@ -109,6 +112,8 @@ func TestAccDigitalOceanKubernetesCluster_UpdatePoolDetails(t *testing.T) {
 					testAccCheckDigitalOceanKubernetesClusterExists("digitalocean_kubernetes_cluster.foobar", &k8s),
 					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "name", rName),
 					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.#", "1"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.0.node_count", "1"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.0.actual_node_count", "1"),
 					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.0.name", "default"),
 				),
 			},
@@ -117,9 +122,10 @@ func TestAccDigitalOceanKubernetesCluster_UpdatePoolDetails(t *testing.T) {
 				Check: resource.ComposeAggregateTestCheckFunc(
 					testAccCheckDigitalOceanKubernetesClusterExists("digitalocean_kubernetes_cluster.foobar", &k8s),
 					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "name", rName),
-					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.#", "1"),
 					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.0.name", "default-rename"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.#", "1"),
 					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.0.node_count", "2"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.0.actual_node_count", "2"),
 					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.0.tags.#", "3"),
 				),
 			},
@@ -143,6 +149,8 @@ func TestAccDigitalOceanKubernetesCluster_UpdatePoolSize(t *testing.T) {
 					testAccCheckDigitalOceanKubernetesClusterExists("digitalocean_kubernetes_cluster.foobar", &k8s),
 					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "name", rName),
 					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.#", "1"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.0.node_count", "1"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.0.actual_node_count", "1"),
 					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.0.size", "s-1vcpu-2gb"),
 				),
 			},
@@ -153,6 +161,7 @@ func TestAccDigitalOceanKubernetesCluster_UpdatePoolSize(t *testing.T) {
 					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "name", rName),
 					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.#", "1"),
 					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.0.node_count", "1"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.0.actual_node_count", "1"),
 					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.0.size", "s-2vcpu-4gb"),
 				),
 			},
@@ -160,6 +169,236 @@ func TestAccDigitalOceanKubernetesCluster_UpdatePoolSize(t *testing.T) {
 	})
 }
 
+func TestAccDigitalOceanKubernetesCluster_CreatePoolWithAutoScale(t *testing.T) {
+	t.Parallel()
+	rName := randomTestName()
+	var k8s godo.KubernetesCluster
+
+	resource.Test(t, resource.TestCase{
+		PreCheck:     func() { testAccPreCheck(t) },
+		Providers:    testAccProviders,
+		CheckDestroy: testAccCheckDigitalOceanKubernetesClusterDestroy,
+		Steps: []resource.TestStep{
+			// Create with auto-scaling and explicit node_count.
+			{
+				Config: fmt.Sprintf(`
+					resource "digitalocean_kubernetes_cluster" "foobar" {
+						name    = "%s"
+						region  = "lon1"
+						version = "%s"
+
+						node_pool {
+							name = "default"
+							size  = "s-1vcpu-2gb"
+							node_count = 1
+							auto_scale = true
+							min_nodes = 1
+							max_nodes = 3
+						}
+					}
+				`, rName, testClusterVersion),
+				Check: resource.ComposeAggregateTestCheckFunc(
+					testAccCheckDigitalOceanKubernetesClusterExists("digitalocean_kubernetes_cluster.foobar", &k8s),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "name", rName),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.#", "1"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.0.node_count", "1"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.0.actual_node_count", "1"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.0.size", "s-1vcpu-2gb"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.0.auto_scale", "true"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.0.min_nodes", "1"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.0.max_nodes", "3"),
+				),
+			},
+			// Remove node_count, keep auto-scaling.
+			{
+				Config: fmt.Sprintf(`
+					resource "digitalocean_kubernetes_cluster" "foobar" {
+						name    = "%s"
+						region  = "lon1"
+						version = "%s"
+
+						node_pool {
+							name = "default"
+							size  = "s-1vcpu-2gb"
+							auto_scale = true
+							min_nodes = 1
+							max_nodes = 3
+						}
+					}
+				`, rName, testClusterVersion),
+				Check: resource.ComposeAggregateTestCheckFunc(
+					testAccCheckDigitalOceanKubernetesClusterExists("digitalocean_kubernetes_cluster.foobar", &k8s),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "name", rName),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.#", "1"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.0.node_count", "1"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.0.actual_node_count", "1"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.0.size", "s-1vcpu-2gb"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.0.auto_scale", "true"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.0.min_nodes", "1"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.0.max_nodes", "3"),
+				),
+			},
+			// Update node_count, keep auto-scaling.
+			{
+				Config: fmt.Sprintf(`
+					resource "digitalocean_kubernetes_cluster" "foobar" {
+						name    = "%s"
+						region  = "lon1"
+						version = "%s"
+
+						node_pool {
+							name = "default"
+							size  = "s-1vcpu-2gb"
+							node_count = 2
+							auto_scale = true
+							min_nodes = 1
+							max_nodes = 3
+						}
+					}
+				`, rName, testClusterVersion),
+				Check: resource.ComposeAggregateTestCheckFunc(
+					testAccCheckDigitalOceanKubernetesClusterExists("digitalocean_kubernetes_cluster.foobar", &k8s),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "name", rName),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.#", "1"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.0.node_count", "2"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.0.actual_node_count", "2"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.0.size", "s-1vcpu-2gb"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.0.auto_scale", "true"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.0.min_nodes", "1"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.0.max_nodes", "3"),
+				),
+			},
+			// Disable auto-scaling.
+			{
+				Config: fmt.Sprintf(`
+					resource "digitalocean_kubernetes_cluster" "foobar" {
+						name    = "%s"
+						region  = "lon1"
+						version = "%s"
+
+						node_pool {
+							name = "default"
+							size  = "s-1vcpu-2gb"
+							node_count = 2
+						}
+					}
+				`, rName, testClusterVersion),
+				Check: resource.ComposeAggregateTestCheckFunc(
+					testAccCheckDigitalOceanKubernetesClusterExists("digitalocean_kubernetes_cluster.foobar", &k8s),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "name", rName),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.#", "1"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.0.node_count", "2"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.0.actual_node_count", "2"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.0.size", "s-1vcpu-2gb"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.0.auto_scale", "false"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.0.min_nodes", "0"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.0.max_nodes", "0"),
+				),
+			},
+		},
+	})
+}
+
+func TestAccDigitalOceanKubernetesCluster_UpdatePoolWithAutoScale(t *testing.T) {
+	t.Parallel()
+	rName := randomTestName()
+	var k8s godo.KubernetesCluster
+
+	resource.Test(t, resource.TestCase{
+		PreCheck:     func() { testAccPreCheck(t) },
+		Providers:    testAccProviders,
+		CheckDestroy: testAccCheckDigitalOceanKubernetesClusterDestroy,
+		Steps: []resource.TestStep{
+			// Create with auto-scaling disabled.
+			{
+				Config: fmt.Sprintf(`
+				resource "digitalocean_kubernetes_cluster" "foobar" {
+					name    = "%s"
+					region  = "lon1"
+					version = "%s"
+
+					node_pool {
+						name = "default"
+						size  = "s-1vcpu-2gb"
+						node_count = 1
+					}
+				}
+			`, rName, testClusterVersion),
+				Check: resource.ComposeAggregateTestCheckFunc(
+					testAccCheckDigitalOceanKubernetesClusterExists("digitalocean_kubernetes_cluster.foobar", &k8s),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "name", rName),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.#", "1"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.0.node_count", "1"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.0.actual_node_count", "1"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.0.size", "s-1vcpu-2gb"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.0.auto_scale", "false"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.0.min_nodes", "0"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.0.max_nodes", "0"),
+				),
+			},
+			// Enable auto-scaling with explicit node_count.
+			{
+				Config: fmt.Sprintf(`
+					resource "digitalocean_kubernetes_cluster" "foobar" {
+						name    = "%s"
+						region  = "lon1"
+						version = "%s"
+
+						node_pool {
+							name = "default"
+							size  = "s-1vcpu-2gb"
+							node_count = 1
+							auto_scale = true
+							min_nodes = 1
+							max_nodes = 3
+						}
+					}
+				`, rName, testClusterVersion),
+				Check: resource.ComposeAggregateTestCheckFunc(
+					testAccCheckDigitalOceanKubernetesClusterExists("digitalocean_kubernetes_cluster.foobar", &k8s),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "name", rName),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.#", "1"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.0.node_count", "1"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.0.actual_node_count", "1"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.0.size", "s-1vcpu-2gb"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.0.auto_scale", "true"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.0.min_nodes", "1"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.0.max_nodes", "3"),
+				),
+			},
+			// Remove node_count, keep auto-scaling.
+			{
+				Config: fmt.Sprintf(`
+					resource "digitalocean_kubernetes_cluster" "foobar" {
+						name    = "%s"
+						region  = "lon1"
+						version = "%s"
+
+						node_pool {
+							name = "default"
+							size  = "s-1vcpu-2gb"
+							auto_scale = true
+							min_nodes = 1
+							max_nodes = 3
+						}
+					}
+				`, rName, testClusterVersion),
+				Check: resource.ComposeAggregateTestCheckFunc(
+					testAccCheckDigitalOceanKubernetesClusterExists("digitalocean_kubernetes_cluster.foobar", &k8s),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "name", rName),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.#", "1"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.0.node_count", "1"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.0.actual_node_count", "1"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.0.size", "s-1vcpu-2gb"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.0.auto_scale", "true"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.0.min_nodes", "1"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "node_pool.0.max_nodes", "3"),
+				),
+			},
+		},
+	})
+}
+
 func TestAccDigitalOceanKubernetesCluster_KubernetesProviderInteroperability(t *testing.T) {
 	t.Parallel()
 	rName := randomTestName()
@@ -188,7 +427,7 @@ func testAccDigitalOceanKubernetesConfigBasic(rName string) string {
 resource "digitalocean_kubernetes_cluster" "foobar" {
 	name    = "%s"
 	region  = "lon1"
-	version = "1.15.4-do.0"
+	version = "%s"
 	tags    = ["foo","bar", "one"]
 
 	node_pool {
@@ -198,7 +437,7 @@ resource "digitalocean_kubernetes_cluster" "foobar" {
 		tags  = ["one","two"]
 	}
 }
-`, rName)
+`, rName, testClusterVersion)
 }
 
 func testAccDigitalOceanKubernetesConfigBasic2(rName string) string {
@@ -206,7 +445,7 @@ func testAccDigitalOceanKubernetesConfigBasic2(rName string) string {
 resource "digitalocean_kubernetes_cluster" "foobar" {
 	name    = "%s"
 	region  = "lon1"
-	version = "1.15.4-do.0"
+	version = "%s"
 	tags    = ["foo","bar"]
 
 	node_pool {
@@ -216,7 +455,7 @@ resource "digitalocean_kubernetes_cluster" "foobar" {
 		tags  = ["one","two","three"]
 	}
 }
-`, rName)
+`, rName, testClusterVersion)
 }
 
 func testAccDigitalOceanKubernetesConfigBasic3(rName string) string {
@@ -224,7 +463,7 @@ func testAccDigitalOceanKubernetesConfigBasic3(rName string) string {
 resource "digitalocean_kubernetes_cluster" "foobar" {
 	name    = "%s"
 	region  = "lon1"
-	version = "1.15.4-do.0"
+	version = "%s"
 	tags    = ["foo","bar"]
 
 	node_pool {
@@ -234,7 +473,7 @@ resource "digitalocean_kubernetes_cluster" "foobar" {
 		tags  = ["one","two"]
 	}
 }
-`, rName)
+`, rName, testClusterVersion)
 }
 
 func testAccDigitalOceanKubernetesConfigBasic4(rName string) string {
@@ -242,7 +481,7 @@ func testAccDigitalOceanKubernetesConfigBasic4(rName string) string {
 resource "digitalocean_kubernetes_cluster" "foobar" {
 	name    = "%s"
 	region  = "lon1"
-	version = "1.15.4-do.0"
+	version = "%s"
 	tags    = ["one","two"]
 
 	node_pool {
@@ -252,7 +491,7 @@ resource "digitalocean_kubernetes_cluster" "foobar" {
 		tags  = ["foo","bar"]
 	}
 }
-`, rName)
+`, rName, testClusterVersion)
 }
 
 func testAccDigitalOceanKubernetesConfig_KubernetesProviderInteroperability(rName string) string {
@@ -260,7 +499,7 @@ func testAccDigitalOceanKubernetesConfig_KubernetesProviderInteroperability(rNam
 resource "digitalocean_kubernetes_cluster" "foobar" {
 	name    = "%s"
 	region  = "lon1"
-	version = "1.15.4-do.0"
+	version = "%s"
 
 	node_pool {
 	  name = "default"
@@ -292,7 +531,7 @@ resource "kubernetes_service_account" "tiller" {
 
   automount_service_account_token = true
 }
-`, rName)
+`, rName, testClusterVersion)
 }
 
 func testAccCheckDigitalOceanKubernetesClusterDestroy(s *terraform.State) error {

digitalocean/resource_digitalocean_kubernetes_node_pool.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"fmt"
 	"net/http"
+	"strings"
 	"time"
 
 	"github.com/digitalocean/godo"
@@ -65,10 +66,56 @@ func nodePoolSchema() map[string]*schema.Schema {
 			ValidateFunc: validation.NoZeroValues,
 		},
 
+		"actual_node_count": {
+			Type:     schema.TypeInt,
+			Computed: true,
+		},
+
 		"node_count": {
 			Type:         schema.TypeInt,
-			Required:     true,
+			Optional:     true,
 			ValidateFunc: validation.IntAtLeast(1),
+			DiffSuppressFunc: func(key, old, new string, d *schema.ResourceData) bool {
+				nodeCountKey := "node_count"
+				actualNodeCountKey := "actual_node_count"
+
+				// Since this schema is shared between the node pool resource
+				// and as the node pool sub-element of the cluster resource,
+				// we need to check for both variants of the incoming key.
+				keyParts := strings.Split(key, ".")
+				if keyParts[0] == "node_pool" {
+					npKeyParts := keyParts[:len(keyParts)-1]
+					nodeCountKeyParts := append(npKeyParts, "node_count")
+					nodeCountKey = strings.Join(nodeCountKeyParts, ".")
+					actualNodeCountKeyParts := append(npKeyParts, "actual_node_count")
+					actualNodeCountKey = strings.Join(actualNodeCountKeyParts, ".")
+				}
+
+				// If node_count equals actual_node_count already, then
+				// suppress the diff.
+				if d.Get(nodeCountKey).(int) == d.Get(actualNodeCountKey).(int) {
+					return true
+				}
+
+				// Otherwise suppress the diff only if old equals new.
+				return old == new
+			},
+		},
+
+		"auto_scale": {
+			Type:     schema.TypeBool,
+			Optional: true,
+			Default:  false,
+		},
+
+		"min_nodes": {
+			Type:     schema.TypeInt,
+			Optional: true,
+		},
+
+		"max_nodes": {
+			Type:     schema.TypeInt,
+			Optional: true,
 		},
 
 		"tags": tagsSchema(),
@@ -118,8 +165,11 @@ func resourceDigitalOceanKubernetesNodePoolCreate(d *schema.ResourceData, meta i
 	rawPool := map[string]interface{}{
 		"name":       d.Get("name"),
 		"size":       d.Get("size"),
-		"node_count": d.Get("node_count"),
 		"tags":       d.Get("tags"),
+		"node_count": d.Get("node_count"),
+		"auto_scale": d.Get("auto_scale"),
+		"min_nodes":  d.Get("min_nodes"),
+		"max_nodes":  d.Get("max_nodes"),
 	}
 
 	pool, err := digitaloceanKubernetesNodePoolCreate(client, rawPool, d.Get("cluster_id").(string))
@@ -148,10 +198,17 @@ func resourceDigitalOceanKubernetesNodePoolRead(d *schema.ResourceData, meta int
 	d.Set("name", pool.Name)
 	d.Set("size", pool.Size)
 	d.Set("node_count", pool.Count)
+	d.Set("actual_node_count", pool.Count)
 	d.Set("tags", flattenTags(filterTags(pool.Tags)))
-
+	d.Set("auto_scale", pool.AutoScale)
-	if pool.Nodes != nil {
+	d.Set("min_nodes", pool.MinNodes)
+	d.Set("max_nodes", pool.MaxNodes)
 	d.Set("nodes", flattenNodes(pool.Nodes))
+
+	// Assign a node_count only if it's been set explicitly, since it's
+	// optional and we don't want to update with a 0 if it's not set.
+	if _, ok := d.GetOk("node_count"); ok {
+		d.Set("node_count", pool.Count)
 	}
 
 	return nil
@@ -162,10 +219,17 @@ func resourceDigitalOceanKubernetesNodePoolUpdate(d *schema.ResourceData, meta i
 
 	rawPool := map[string]interface{}{
 		"name": d.Get("name"),
-		"node_count": d.Get("node_count"),
 		"tags": d.Get("tags"),
 	}
 
+	if _, ok := d.GetOk("node_count"); ok {
+		rawPool["node_count"] = d.Get("node_count")
+	}
+
+	rawPool["auto_scale"] = d.Get("auto_scale")
+	rawPool["min_nodes"] = d.Get("min_nodes")
+	rawPool["max_nodes"] = d.Get("max_nodes")
+
 	_, err := digitaloceanKubernetesNodePoolUpdate(client, rawPool, d.Get("cluster_id").(string), d.Id())
 	if err != nil {
 		return fmt.Errorf("Error updating node pool: %s", err)
@@ -185,12 +249,17 @@ func digitaloceanKubernetesNodePoolCreate(client *godo.Client, pool map[string]i
 	tags := expandTags(pool["tags"].(*schema.Set).List())
 	tags = append(tags, customTags...)
 
-	p, _, err := client.Kubernetes.CreateNodePool(context.Background(), clusterID, &godo.KubernetesNodePoolCreateRequest{
+	req := &godo.KubernetesNodePoolCreateRequest{
 		Name:      pool["name"].(string),
 		Size:      pool["size"].(string),
 		Count:     pool["node_count"].(int),
 		Tags:      tags,
-	})
+		AutoScale: pool["auto_scale"].(bool),
+		MinNodes:  pool["min_nodes"].(int),
+		MaxNodes:  pool["max_nodes"].(int),
+	}
+
+	p, _, err := client.Kubernetes.CreateNodePool(context.Background(), clusterID, req)
 
 	if err != nil {
 		return nil, fmt.Errorf("Unable to create new default node pool %s", err)
@@ -208,12 +277,29 @@ func digitaloceanKubernetesNodePoolUpdate(client *godo.Client, pool map[string]i
 	tags := expandTags(pool["tags"].(*schema.Set).List())
 	tags = append(tags, customTags...)
 
-	count := pool["node_count"].(int)
+	req := &godo.KubernetesNodePoolUpdateRequest{
-	p, resp, err := client.Kubernetes.UpdateNodePool(context.Background(), clusterID, poolID, &godo.KubernetesNodePoolUpdateRequest{
 		Name: pool["name"].(string),
-		Count: &count,
 		Tags: tags,
-	})
+	}
+
+	if pool["node_count"] != nil {
+		req.Count = intPtr(pool["node_count"].(int))
+	}
+
+	if pool["auto_scale"] == nil {
+		pool["auto_scale"] = false
+	}
+	req.AutoScale = boolPtr(pool["auto_scale"].(bool))
+
+	if pool["min_nodes"] != nil {
+		req.MinNodes = intPtr(pool["min_nodes"].(int))
+	}
+
+	if pool["max_nodes"] != nil {
+		req.MaxNodes = intPtr(pool["max_nodes"].(int))
+	}
+
+	p, resp, err := client.Kubernetes.UpdateNodePool(context.Background(), clusterID, poolID, req)
 
 	if err != nil {
 		if resp != nil && resp.StatusCode == 404 {
@@ -320,6 +406,9 @@ func expandNodePools(nodePools []interface{}) []*godo.KubernetesNodePool {
 			Name:      pool["name"].(string),
 			Size:      pool["size"].(string),
 			Count:     pool["node_count"].(int),
+			AutoScale: pool["auto_scale"].(bool),
+			MinNodes:  pool["min_nodes"].(int),
+			MaxNodes:  pool["max_nodes"].(int),
 			Tags:      expandTags(pool["tags"].(*schema.Set).List()),
 			Nodes:     expandNodes(pool["nodes"].([]interface{})),
 		}
@@ -345,31 +434,12 @@ func expandNodes(nodes []interface{}) []*godo.KubernetesNode {
 	return expandedNodes
 }
 
-func flattenNodePool(pool *godo.KubernetesNodePool, parentTags ...string) []interface{} {
-	rawPool := map[string]interface{}{
-		"id":         pool.ID,
-		"name":       pool.Name,
-		"size":       pool.Size,
-		"node_count": pool.Count,
-	}
-
-	if pool.Tags != nil {
-		rawPool["tags"] = flattenTags(filterTags(pool.Tags))
-	}
-
-	if pool.Nodes != nil {
-		rawPool["nodes"] = flattenNodes(pool.Nodes)
-	}
-
-	return []interface{}{rawPool}
-}
-
 func flattenNodes(nodes []*godo.KubernetesNode) []interface{} {
+	flattenedNodes := make([]interface{}, 0)
 	if nodes == nil {
-		return nil
+		return flattenedNodes
 	}
 
-	flattenedNodes := make([]interface{}, 0)
 	for _, node := range nodes {
 		rawNode := map[string]interface{}{
 			"id":         node.ID,

digitalocean/resource_digitalocean_kubernetes_node_pool_test.go

@@ -54,6 +54,7 @@ func TestAccDigitalOceanKubernetesNodePool_Update(t *testing.T) {
 					resource.TestCheckResourceAttr("digitalocean_kubernetes_node_pool.barfoo", "name", rName),
 					resource.TestCheckResourceAttr("digitalocean_kubernetes_node_pool.barfoo", "tags.#", "2"),
 					resource.TestCheckResourceAttr("digitalocean_kubernetes_node_pool.barfoo", "node_count", "1"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_node_pool.barfoo", "actual_node_count", "1"),
 					resource.TestCheckResourceAttr("digitalocean_kubernetes_node_pool.barfoo", "nodes.#", "1"),
 				),
 			},
@@ -66,6 +67,7 @@ func TestAccDigitalOceanKubernetesNodePool_Update(t *testing.T) {
 					resource.TestCheckResourceAttr("digitalocean_kubernetes_node_pool.barfoo", "name", rName+"-updated"),
 					resource.TestCheckResourceAttr("digitalocean_kubernetes_node_pool.barfoo", "tags.#", "3"),
 					resource.TestCheckResourceAttr("digitalocean_kubernetes_node_pool.barfoo", "node_count", "2"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_node_pool.barfoo", "actual_node_count", "2"),
 					resource.TestCheckResourceAttr("digitalocean_kubernetes_node_pool.barfoo", "nodes.#", "2"),
 				),
 			},
@@ -73,12 +75,329 @@ func TestAccDigitalOceanKubernetesNodePool_Update(t *testing.T) {
 	})
 }
 
+func TestAccDigitalOceanKubernetesNodePool_CreateWithAutoScale(t *testing.T) {
+	t.Parallel()
+	rName := randomTestName()
+	var k8s godo.KubernetesCluster
+	var k8sPool godo.KubernetesNodePool
+
+	resource.Test(t, resource.TestCase{
+		PreCheck:     func() { testAccPreCheck(t) },
+		Providers:    testAccProviders,
+		CheckDestroy: testAccCheckDigitalOceanKubernetesClusterDestroy,
+		Steps: []resource.TestStep{
+			// Create without auto-scaling.
+			{
+				Config: fmt.Sprintf(`
+					resource "digitalocean_kubernetes_cluster" "foobar" {
+						name = "%s"
+						region = "lon1"
+						version = "%s"
+
+						node_pool {
+							name = "default"
+							size  = "s-1vcpu-2gb"
+							node_count = 1
+						}
+					}
+
+					resource digitalocean_kubernetes_node_pool "barfoo" {
+						cluster_id = "${digitalocean_kubernetes_cluster.foobar.id}"
+						name = "%s"
+						size = "s-1vcpu-2gb"
+						node_count = 1
+						auto_scale = true
+						min_nodes = 1
+						max_nodes = 5
+					}
+				`, rName, testClusterVersion, rName),
+				Check: resource.ComposeAggregateTestCheckFunc(
+					testAccCheckDigitalOceanKubernetesClusterExists("digitalocean_kubernetes_cluster.foobar", &k8s),
+					testAccCheckDigitalOceanKubernetesNodePoolExists("digitalocean_kubernetes_node_pool.barfoo", &k8s, &k8sPool),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "name", rName),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_node_pool.barfoo", "name", rName),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_node_pool.barfoo", "node_count", "1"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_node_pool.barfoo", "actual_node_count", "1"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_node_pool.barfoo", "nodes.#", "1"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_node_pool.barfoo", "auto_scale", "true"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_node_pool.barfoo", "min_nodes", "1"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_node_pool.barfoo", "max_nodes", "5"),
+				),
+			},
+			// Remove node count, keep auto-scaling.
+			{
+				Config: fmt.Sprintf(`
+					resource "digitalocean_kubernetes_cluster" "foobar" {
+						name = "%s"
+						region = "lon1"
+						version = "%s"
+
+						node_pool {
+							name = "default"
+							size = "s-1vcpu-2gb"
+							node_count = 1
+						}
+					}
+
+					resource digitalocean_kubernetes_node_pool "barfoo" {
+						cluster_id = "${digitalocean_kubernetes_cluster.foobar.id}"
+						name = "%s"
+						size = "s-1vcpu-2gb"
+						auto_scale = true
+						min_nodes = 1
+						max_nodes = 3
+					}
+				`, rName, testClusterVersion, rName),
+				Check: resource.ComposeAggregateTestCheckFunc(
+					testAccCheckDigitalOceanKubernetesClusterExists("digitalocean_kubernetes_cluster.foobar", &k8s),
+					testAccCheckDigitalOceanKubernetesNodePoolExists("digitalocean_kubernetes_node_pool.barfoo", &k8s, &k8sPool),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "name", rName),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_node_pool.barfoo", "name", rName),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_node_pool.barfoo", "node_count", "1"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_node_pool.barfoo", "actual_node_count", "1"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_node_pool.barfoo", "nodes.#", "1"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_node_pool.barfoo", "auto_scale", "true"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_node_pool.barfoo", "min_nodes", "1"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_node_pool.barfoo", "max_nodes", "3"),
+				),
+			},
+			// Update node count, keep auto-scaling.
+			{
+				Config: fmt.Sprintf(`
+					resource "digitalocean_kubernetes_cluster" "foobar" {
+						name = "%s"
+						region = "lon1"
+						version = "%s"
+
+						node_pool {
+							name = "default"
+							size = "s-1vcpu-2gb"
+							node_count = 1
+						}
+					}
+
+					resource digitalocean_kubernetes_node_pool "barfoo" {
+						cluster_id = "${digitalocean_kubernetes_cluster.foobar.id}"
+						name = "%s"
+						size = "s-1vcpu-2gb"
+						node_count = 2
+						auto_scale = true
+						min_nodes = 1
+						max_nodes = 3
+					}
+				`, rName, testClusterVersion, rName),
+				Check: resource.ComposeAggregateTestCheckFunc(
+					testAccCheckDigitalOceanKubernetesClusterExists("digitalocean_kubernetes_cluster.foobar", &k8s),
+					testAccCheckDigitalOceanKubernetesNodePoolExists("digitalocean_kubernetes_node_pool.barfoo", &k8s, &k8sPool),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "name", rName),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_node_pool.barfoo", "name", rName),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_node_pool.barfoo", "node_count", "2"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_node_pool.barfoo", "actual_node_count", "2"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_node_pool.barfoo", "nodes.#", "2"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_node_pool.barfoo", "auto_scale", "true"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_node_pool.barfoo", "min_nodes", "1"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_node_pool.barfoo", "max_nodes", "3"),
+				),
+			},
+			// Disable auto-scaling.
+			{
+				Config: fmt.Sprintf(`
+					resource "digitalocean_kubernetes_cluster" "foobar" {
+						name = "%s"
+						region = "lon1"
+						version = "%s"
+
+						node_pool {
+							name = "default"
+							size = "s-1vcpu-2gb"
+							node_count = 1
+						}
+					}
+
+					resource digitalocean_kubernetes_node_pool "barfoo" {
+						cluster_id = "${digitalocean_kubernetes_cluster.foobar.id}"
+						name = "%s"
+						size = "s-1vcpu-2gb"
+						node_count = 2
+					}
+				`, rName, testClusterVersion, rName),
+				Check: resource.ComposeAggregateTestCheckFunc(
+					testAccCheckDigitalOceanKubernetesClusterExists("digitalocean_kubernetes_cluster.foobar", &k8s),
+					testAccCheckDigitalOceanKubernetesNodePoolExists("digitalocean_kubernetes_node_pool.barfoo", &k8s, &k8sPool),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "name", rName),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_node_pool.barfoo", "name", rName),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_node_pool.barfoo", "node_count", "2"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_node_pool.barfoo", "actual_node_count", "2"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_node_pool.barfoo", "nodes.#", "2"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_node_pool.barfoo", "auto_scale", "false"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_node_pool.barfoo", "min_nodes", "0"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_node_pool.barfoo", "max_nodes", "0"),
+				),
+			},
+		},
+	})
+}
+
+func TestAccDigitalOceanKubernetesNodePool_UpdateWithAutoScale(t *testing.T) {
+	t.Parallel()
+	rName := randomTestName()
+	var k8s godo.KubernetesCluster
+	var k8sPool godo.KubernetesNodePool
+
+	resource.Test(t, resource.TestCase{
+		PreCheck:     func() { testAccPreCheck(t) },
+		Providers:    testAccProviders,
+		CheckDestroy: testAccCheckDigitalOceanKubernetesClusterDestroy,
+		Steps: []resource.TestStep{
+			// Create without auto-scaling.
+			{
+				Config: fmt.Sprintf(`
+					resource "digitalocean_kubernetes_cluster" "foobar" {
+						name = "%s"
+						region = "lon1"
+						version = "%s"
+
+						node_pool {
+							name = "default"
+							size = "s-1vcpu-2gb"
+							node_count = 1
+						}
+					}
+
+					resource digitalocean_kubernetes_node_pool "barfoo" {
+						cluster_id = "${digitalocean_kubernetes_cluster.foobar.id}"
+						name = "%s"
+						size = "s-1vcpu-2gb"
+						node_count = 1
+					}
+				`, rName, testClusterVersion, rName),
+				Check: resource.ComposeAggregateTestCheckFunc(
+					testAccCheckDigitalOceanKubernetesClusterExists("digitalocean_kubernetes_cluster.foobar", &k8s),
+					testAccCheckDigitalOceanKubernetesNodePoolExists("digitalocean_kubernetes_node_pool.barfoo", &k8s, &k8sPool),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "name", rName),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_node_pool.barfoo", "name", rName),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_node_pool.barfoo", "node_count", "1"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_node_pool.barfoo", "actual_node_count", "1"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_node_pool.barfoo", "nodes.#", "1"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_node_pool.barfoo", "auto_scale", "false"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_node_pool.barfoo", "min_nodes", "0"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_node_pool.barfoo", "max_nodes", "0"),
+				),
+			},
+			// Update to enable auto-scaling.
+			{
+				Config: fmt.Sprintf(`
+					resource "digitalocean_kubernetes_cluster" "foobar" {
+						name = "%s"
+						region = "lon1"
+						version = "%s"
+
+						node_pool {
+							name = "default"
+							size = "s-1vcpu-2gb"
+							node_count = 1
+						}
+					}
+
+					resource digitalocean_kubernetes_node_pool "barfoo" {
+						cluster_id = "${digitalocean_kubernetes_cluster.foobar.id}"
+						name = "%s"
+						size = "s-1vcpu-2gb"
+						node_count = 1
+						auto_scale = true
+						min_nodes = 1
+						max_nodes = 3
+					}
+				`, rName, testClusterVersion, rName),
+				Check: resource.ComposeAggregateTestCheckFunc(
+					testAccCheckDigitalOceanKubernetesClusterExists("digitalocean_kubernetes_cluster.foobar", &k8s),
+					testAccCheckDigitalOceanKubernetesNodePoolExists("digitalocean_kubernetes_node_pool.barfoo", &k8s, &k8sPool),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "name", rName),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_node_pool.barfoo", "name", rName),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_node_pool.barfoo", "node_count", "1"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_node_pool.barfoo", "actual_node_count", "1"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_node_pool.barfoo", "nodes.#", "1"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_node_pool.barfoo", "auto_scale", "true"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_node_pool.barfoo", "min_nodes", "1"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_node_pool.barfoo", "max_nodes", "3"),
+				),
+			},
+			// Remove node count, keep auto-scaling.
+			{
+				Config: fmt.Sprintf(`
+					resource "digitalocean_kubernetes_cluster" "foobar" {
+						name = "%s"
+						region = "lon1"
+						version = "%s"
+
+						node_pool {
+							name = "default"
+							size  = "s-1vcpu-2gb"
+							node_count = 1
+						}
+					}
+
+					resource digitalocean_kubernetes_node_pool "barfoo" {
+						cluster_id = "${digitalocean_kubernetes_cluster.foobar.id}"
+						name = "%s"
+						size = "s-1vcpu-2gb"
+						auto_scale = true
+						min_nodes = 1
+						max_nodes = 3
+					}
+				`, rName, testClusterVersion, rName),
+				Check: resource.ComposeAggregateTestCheckFunc(
+					testAccCheckDigitalOceanKubernetesClusterExists("digitalocean_kubernetes_cluster.foobar", &k8s),
+					testAccCheckDigitalOceanKubernetesNodePoolExists("digitalocean_kubernetes_node_pool.barfoo", &k8s, &k8sPool),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "name", rName),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_node_pool.barfoo", "name", rName),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_node_pool.barfoo", "node_count", "1"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_node_pool.barfoo", "actual_node_count", "1"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_node_pool.barfoo", "nodes.#", "1"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_node_pool.barfoo", "auto_scale", "true"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_node_pool.barfoo", "min_nodes", "1"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_node_pool.barfoo", "max_nodes", "3"),
+				),
+			},
+		},
+	})
+}
+
+func TestAccDigitalOceanKubernetesNodePool_WithEmptyNodePool(t *testing.T) {
+	t.Parallel()
+	rName := randomTestName()
+	var k8s godo.KubernetesCluster
+	var k8sPool godo.KubernetesNodePool
+
+	resource.Test(t, resource.TestCase{
+		PreCheck:     func() { testAccPreCheck(t) },
+		Providers:    testAccProviders,
+		CheckDestroy: testAccCheckDigitalOceanKubernetesClusterDestroy,
+		Steps: []resource.TestStep{
+			{
+				Config: testAccDigitalOceanKubernetesConfigWithEmptyNodePool(rName),
+				Check: resource.ComposeAggregateTestCheckFunc(
+					testAccCheckDigitalOceanKubernetesClusterExists("digitalocean_kubernetes_cluster.foobar", &k8s),
+					testAccCheckDigitalOceanKubernetesNodePoolExists("digitalocean_kubernetes_node_pool.barfoo", &k8s, &k8sPool),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_cluster.foobar", "name", rName),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_node_pool.barfoo", "name", fmt.Sprintf("%s-pool", rName)),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_node_pool.barfoo", "actual_node_count", "0"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_node_pool.barfoo", "nodes.#", "0"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_node_pool.barfoo", "auto_scale", "true"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_node_pool.barfoo", "min_nodes", "0"),
+					resource.TestCheckResourceAttr("digitalocean_kubernetes_node_pool.barfoo", "max_nodes", "3"),
+				),
+			},
+		},
+	})
+}
+
 func testAccDigitalOceanKubernetesConfigBasicWithNodePool(rName string) string {
 	return fmt.Sprintf(`
 resource "digitalocean_kubernetes_cluster" "foobar" {
 	name    = "%s"
 	region  = "lon1"
-	version = "1.15.4-do.0"
+	version = "%s"
 	tags    = ["foo","bar"]
 
 	node_pool {
@@ -97,7 +416,7 @@ resource digitalocean_kubernetes_node_pool "barfoo" {
 	node_count = 1
 	tags  = ["three","four"]
 }
-`, rName, rName)
+`, rName, testClusterVersion, rName)
 }
 
 func testAccDigitalOceanKubernetesConfigBasicWithNodePool2(rName string) string {
@@ -105,7 +424,7 @@ func testAccDigitalOceanKubernetesConfigBasicWithNodePool2(rName string) string
 resource "digitalocean_kubernetes_cluster" "foobar" {
 	name    = "%s"
 	region  = "lon1"
-	version = "1.15.4-do.0"
+	version = "%s"
 	tags    = ["foo","bar"]
 
 	node_pool {
@@ -124,7 +443,33 @@ resource digitalocean_kubernetes_node_pool "barfoo" {
 	node_count = 2
 	tags  = ["one","two", "three"]
 }
-`, rName, rName)
+`, rName, testClusterVersion, rName)
+}
+
+func testAccDigitalOceanKubernetesConfigWithEmptyNodePool(rName string) string {
+	return fmt.Sprintf(`
+resource "digitalocean_kubernetes_cluster" "foobar" {
+	name    = "%s"
+	region  = "lon1"
+	version = "%s"
+
+	node_pool {
+		name       = "default"
+		size       = "s-1vcpu-2gb"
+		node_count = 1
+	}
+}
+
+resource digitalocean_kubernetes_node_pool "barfoo" {
+  cluster_id = "${digitalocean_kubernetes_cluster.foobar.id}"
+
+	name       = "%s-pool"
+	size       = "s-1vcpu-2gb"
+	auto_scale = true
+	min_nodes  = 0
+	max_nodes  = 3
+}
+`, rName, testClusterVersion, rName)
 }
 
 func testAccCheckDigitalOceanKubernetesNodePoolExists(n string, cluster *godo.KubernetesCluster, pool *godo.KubernetesNodePool) resource.TestCheckFunc {

digitalocean/util.go

@@ -0,0 +1,9 @@
+package digitalocean
+
+func boolPtr(val bool) *bool {
+	return &val
+}
+
+func intPtr(val int) *int {
+	return &val
+}

website/docs/d/kubernetes_cluster.html.md

@@ -60,6 +60,10 @@ The following attributes are exported:
   - `name` - The name of the node pool.
   - `size` - The slug identifier for the type of Droplet used as workers in the node pool.
   - `node_count` - The number of Droplet instances in the node pool.
+  - `actual_node_count` - The actual number of nodes in the node pool, which is especially useful when auto-scaling is enabled.
+  - `auto_scale` - A boolean indicating whether auto-scaling is enabled on the node pool.
+  - `min_nodes` - If auto-scaling is enabled, this represents the minimum number of nodes that the node pool can be scaled down to.
+  - `max_nodes` - If auto-scaling is enabled, this represents the maximum number of nodes that the node pool can be scaled up to.
   - `tags` - A list of tag names applied to the node pool.
   - `nodes` - A list of nodes in the pool. Each node exports the following attributes:
      + `id` -  A unique ID that can be used to identify and reference the node.

website/docs/r/kubernetes_cluster.html.markdown

@@ -63,7 +63,10 @@ The following arguments are supported:
 * `node_pool` - (Required) A block representing the cluster's default node pool. Additional node pools may be added to the cluster using the `digitalocean_kubernetes_node_pool` resource. The following arguments may be specified:
   - `name` - (Required) A name for the node pool.
   - `size` - (Required) The slug identifier for the type of Droplet to be used as workers in the node pool.
-  - `node_count` - (Required) The number of Droplet instances in the node pool.
+  - `node_count` - (Optional) The number of Droplet instances in the node pool. If auto-scaling is enabled, this should only be set if the desired result is to explicitly reset the number of nodes to this value. If auto-scaling is enabled, and the node count is outside of the given min/max range, it will use the min nodes value.
+  - `auto_scale` - (Optional) Enable auto-scaling of the number of nodes in the node pool within the given min/max range.
+  - `min_nodes` - (Optional) If auto-scaling is enabled, this represents the minimum number of nodes that the node pool can be scaled down to.
+  - `max_nodes` - (Optional) If auto-scaling is enabled, this represents the maximum number of nodes that the node pool can be scaled up to.
   - `tags` - (Optional) A list of tag names to be applied to the Kubernetes cluster.
 * `tags` - (Optional) A list of tag names to be applied to the Kubernetes cluster.
 
@@ -89,6 +92,7 @@ In addition to the arguments listed above, the following additional attributes a
   - `expires_at` - The date and time when the credentials will expire and need to be regenerated.
 * `node_pool` - In addition to the arguments provided, these additional attributes about the cluster's default node pool are exported:
   - `id` -  A unique ID that can be used to identify and reference the node pool.
+  - `actual_node_count` - A computed field representing the actual number of nodes in the node pool, which is especially useful when auto-scaling is enabled.
   - `nodes` - A list of nodes in the pool. Each node exports the following attributes:
      + `id` -  A unique ID that can be used to identify and reference the node.
      + `name` - The auto-generated name for the node.

website/docs/r/kubernetes_node_pool.html.markdown

@@ -43,7 +43,10 @@ The following arguments are supported:
 * `cluster_id` - (Required) The ID of the Kubernetes cluster to which the node pool is associated.
 * `name` - (Required) A name for the node pool.
 * `size` - (Required) The slug identifier for the type of Droplet to be used as workers in the node pool.
-* `node_count` - (Required) The number of Droplet instances in the node pool.
+* `node_count` - (Optional) The number of Droplet instances in the node pool. If auto-scaling is enabled, this should only be set if the desired result is to explicitly reset the number of nodes to this value. If auto-scaling is enabled, and the node count is outside of the given min/max range, it will use the min nodes value.
+* `auto_scale` - (Optional) Enable auto-scaling of the number of nodes in the node pool within the given min/max range.
+* `min_nodes` - (Optional) If auto-scaling is enabled, this represents the minimum number of nodes that the node pool can be scaled down to.
+* `max_nodes` - (Optional) If auto-scaling is enabled, this represents the maximum number of nodes that the node pool can be scaled up to.
 * `tags` - (Optional) A list of tag names to be applied to the Kubernetes cluster.
 
 ## Attributes Reference
@@ -51,6 +54,7 @@ The following arguments are supported:
 In addition to the arguments listed above, the following additional attributes are exported:
 
 * `id` -  A unique ID that can be used to identify and reference the node pool.
+* `actual_node_count` - A computed field representing the actual number of nodes in the node pool, which is especially useful when auto-scaling is enabled.
 * `nodes` - A list of nodes in the pool. Each node exports the following attributes:
   - `id` -  A unique ID that can be used to identify and reference the node.
   - `name` - The auto-generated name for the node.