resource_arm_app_service_plan.go

package azurerm

import (
	"fmt"
	"log"
	"regexp"
	"strings"

	"github.com/terraform-providers/terraform-provider-azurerm/azurerm/helpers/azure"
	"github.com/terraform-providers/terraform-provider-azurerm/azurerm/helpers/suppress"
	"github.com/terraform-providers/terraform-provider-azurerm/azurerm/helpers/tf"
	"github.com/terraform-providers/terraform-provider-azurerm/azurerm/internal/features"
	"github.com/terraform-providers/terraform-provider-azurerm/azurerm/internal/tags"

	"github.com/Azure/azure-sdk-for-go/services/web/mgmt/2018-02-01/web"
	"github.com/hashicorp/terraform/helper/schema"
	"github.com/hashicorp/terraform/helper/validation"
	"github.com/terraform-providers/terraform-provider-azurerm/azurerm/utils"
)

func resourceArmAppServicePlan() *schema.Resource {
	return &schema.Resource{
		Create: resourceArmAppServicePlanCreateUpdate,
		Read:   resourceArmAppServicePlanRead,
		Update: resourceArmAppServicePlanCreateUpdate,
		Delete: resourceArmAppServicePlanDelete,

		Importer: &schema.ResourceImporter{
			State: schema.ImportStatePassthrough,
		},

		Schema: map[string]*schema.Schema{
			"name": {
				Type:         schema.TypeString,
				Required:     true,
				ForceNew:     true,
				ValidateFunc: validateAppServicePlanName,
			},

			"resource_group_name": azure.SchemaResourceGroupName(),

			"location": azure.SchemaLocation(),

			"kind": {
				Type:     schema.TypeString,
				Optional: true,
				Default:  "Windows",
				ForceNew: true,
				ValidateFunc: validation.StringInSlice([]string{
					// @tombuildsstuff: I believe `app` is the older representation of `Windows`
					// thus we need to support it to be able to import resources without recreating them.
					// @jcorioland: new SKU and kind 'xenon' have been added for Windows Containers support
					// https://azure.microsoft.com/en-us/blog/announcing-the-public-preview-of-windows-container-support-in-azure-app-service/
					"App",
					"elastic",
					"FunctionApp",
					"Linux",
					"Windows",
					"xenon",
				}, true),
				DiffSuppressFunc: suppress.CaseDifference,
			},

			"sku": {
				Type:     schema.TypeList,
				Required: true,
				MaxItems: 1,
				Elem: &schema.Resource{
					Schema: map[string]*schema.Schema{
						"tier": {
							Type:     schema.TypeString,
							Required: true,
						},
						"size": {
							Type:     schema.TypeString,
							Required: true,
						},
						"capacity": {
							Type:     schema.TypeInt,
							Optional: true,
							Computed: true,
						},
					},
				},
			},

			"properties": {
				Type:       schema.TypeList,
				Optional:   true,
				Computed:   true,
				MaxItems:   1,
				Deprecated: "These properties have been moved to the top level",
				Elem: &schema.Resource{
					Schema: map[string]*schema.Schema{
						"app_service_environment_id": {
							Type:          schema.TypeString,
							Optional:      true,
							ForceNew:      true,
							Computed:      true,
							Deprecated:    "This property has been moved to the top level",
							ConflictsWith: []string{"app_service_environment_id"},
						},

						"reserved": {
							Type:          schema.TypeBool,
							Optional:      true,
							Computed:      true,
							Deprecated:    "This property has been moved to the top level",
							ConflictsWith: []string{"reserved"},
						},

						"per_site_scaling": {
							Type:          schema.TypeBool,
							Optional:      true,
							Computed:      true,
							Deprecated:    "This property has been moved to the top level",
							ConflictsWith: []string{"per_site_scaling"},
						},
					},
				},
			},

			/// AppServicePlanProperties
			"app_service_environment_id": {
				Type:          schema.TypeString,
				Optional:      true,
				ForceNew:      true,
				Computed:      true,
				ConflictsWith: []string{"properties.0.app_service_environment_id"},
			},

			"per_site_scaling": {
				Type:          schema.TypeBool,
				Optional:      true,
				Computed:      true,
				ConflictsWith: []string{"properties.0.per_site_scaling"},
			},

			"reserved": {
				Type:          schema.TypeBool,
				Optional:      true,
				Computed:      true,
				ConflictsWith: []string{"properties.0.reserved"},
			},

			"maximum_elastic_worker_count": {
				Type:         schema.TypeInt,
				Optional:     true,
				Computed:     true,
				ValidateFunc: validation.IntAtLeast(0),
			},

			"maximum_number_of_workers": {
				Type:     schema.TypeInt,
				Computed: true,
			},

			"is_xenon": {
				Type:     schema.TypeBool,
				Optional: true,
			},

			"tags": tags.Schema(),
		},
	}
}

func resourceArmAppServicePlanCreateUpdate(d *schema.ResourceData, meta interface{}) error {
	client := meta.(*ArmClient).web.AppServicePlansClient
	ctx := meta.(*ArmClient).StopContext

	log.Printf("[INFO] preparing arguments for AzureRM App Service Plan creation.")

	resGroup := d.Get("resource_group_name").(string)
	name := d.Get("name").(string)

	if features.ShouldResourcesBeImported() && d.IsNewResource() {
		existing, err := client.Get(ctx, resGroup, name)
		if err != nil {
			if !utils.ResponseWasNotFound(existing.Response) {
				return fmt.Errorf("Error checking for presence of existing App Service Plan %q (Resource Group %q): %s", name, resGroup, err)
			}
		}

		if existing.ID != nil && *existing.ID != "" {
			return tf.ImportAsExistsError("azurerm_app_service_plan", *existing.ID)
		}
	}

	location := azure.NormalizeLocation(d.Get("location").(string))
	kind := d.Get("kind").(string)
	t := d.Get("tags").(map[string]interface{})

	sku := expandAzureRmAppServicePlanSku(d)
	properties := expandAppServicePlanProperties(d)

	isXenon := d.Get("is_xenon").(bool)
	properties.IsXenon = &isXenon

	if kind == "xenon" && !isXenon {
		return fmt.Errorf("Creating or updating App Service Plan %q (Resource Group %q): when kind is set to xenon, is_xenon property should be set to true", name, resGroup)
	}

	appServicePlan := web.AppServicePlan{
		Location:                 &location,
		Kind:                     &kind,
		Sku:                      &sku,
		Tags:                     tags.Expand(t),
		AppServicePlanProperties: properties,
	}

	if v, exists := d.GetOkExists("app_service_environment_id"); exists {
		appServicePlan.AppServicePlanProperties.HostingEnvironmentProfile = &web.HostingEnvironmentProfile{
			ID: utils.String(v.(string)),
		}
	}

	if v, exists := d.GetOkExists("per_site_scaling"); exists {
		appServicePlan.AppServicePlanProperties.PerSiteScaling = utils.Bool(v.(bool))
	}

	reserved, reservedExists := d.GetOkExists("reserved")
	if strings.EqualFold(kind, "Linux") {
		if !reserved.(bool) || !reservedExists {
			return fmt.Errorf("Reserved has to be set to true when using kind Linux")
		}
	}

	if v, exists := d.GetOkExists("maximum_elastic_worker_count"); exists {
		appServicePlan.AppServicePlanProperties.MaximumElasticWorkerCount = utils.Int32(int32(v.(int)))
	}

	if reservedExists {
		appServicePlan.AppServicePlanProperties.Reserved = utils.Bool(reserved.(bool))
	}

	future, err := client.CreateOrUpdate(ctx, resGroup, name, appServicePlan)
	if err != nil {
		return fmt.Errorf("Error creating/updating App Service Plan %q (Resource Group %q): %+v", name, resGroup, err)
	}

	if err = future.WaitForCompletionRef(ctx, client.Client); err != nil {
		return fmt.Errorf("Error waiting for the create/update of App Service Plan %q (Resource Group %q): %+v", name, resGroup, err)
	}

	read, err := client.Get(ctx, resGroup, name)
	if err != nil {
		return fmt.Errorf("Error retrieving App Service Plan %q (Resource Group %q): %+v", name, resGroup, err)
	}
	if read.ID == nil {
		return fmt.Errorf("Cannot read AzureRM App Service Plan %q (resource group %q) ID", name, resGroup)
	}

	d.SetId(*read.ID)

	return resourceArmAppServicePlanRead(d, meta)
}

func resourceArmAppServicePlanRead(d *schema.ResourceData, meta interface{}) error {
	client := meta.(*ArmClient).web.AppServicePlansClient

	id, err := azure.ParseAzureResourceID(d.Id())
	if err != nil {
		return err
	}

	log.Printf("[DEBUG] Reading Azure App Service Plan %s", id)

	resourceGroup := id.ResourceGroup
	name := id.Path["serverfarms"]

	ctx := meta.(*ArmClient).StopContext
	resp, err := client.Get(ctx, resourceGroup, name)
	if err != nil {
		if utils.ResponseWasNotFound(resp.Response) {
			log.Printf("[DEBUG] App Service Plan %q was not found in Resource Group %q - removnig from state!", name, resourceGroup)
			d.SetId("")
			return nil
		}

		return fmt.Errorf("Error making Read request on App Service Plan %q (Resource Group %q): %+v", name, resourceGroup, err)
	}

	// A 404 doesn't error from the app service plan sdk so we'll add this check here to catch resource not found responses
	// TODO This block can be removed if https://github.com/Azure/azure-sdk-for-go/issues/5407 gets addressed.
	if utils.ResponseWasNotFound(resp.Response) {
		log.Printf("[DEBUG] App Service Plan %q was not found in Resource Group %q - removing from state!", name, resourceGroup)
		d.SetId("")
		return nil
	}

	d.Set("name", name)
	d.Set("resource_group_name", resourceGroup)
	if location := resp.Location; location != nil {
		d.Set("location", azure.NormalizeLocation(*location))
	}
	d.Set("kind", resp.Kind)

	if props := resp.AppServicePlanProperties; props != nil {
		if err := d.Set("properties", flattenAppServiceProperties(props)); err != nil {
			return fmt.Errorf("Error setting `properties`: %+v", err)
		}

		if profile := props.HostingEnvironmentProfile; profile != nil {
			d.Set("app_service_environment_id", profile.ID)
		}

		if props.MaximumNumberOfWorkers != nil {
			d.Set("maximum_number_of_workers", int(*props.MaximumNumberOfWorkers))
		}

		if props.MaximumElasticWorkerCount != nil {
			d.Set("maximum_elastic_worker_count", int(*props.MaximumElasticWorkerCount))
		}

		d.Set("per_site_scaling", props.PerSiteScaling)
		d.Set("reserved", props.Reserved)
		d.Set("is_xenon", props.IsXenon)
	}

	if err := d.Set("sku", flattenAppServicePlanSku(resp.Sku)); err != nil {
		return fmt.Errorf("Error setting `sku`: %+v", err)
	}

	return tags.FlattenAndSet(d, resp.Tags)
}

func resourceArmAppServicePlanDelete(d *schema.ResourceData, meta interface{}) error {
	client := meta.(*ArmClient).web.AppServicePlansClient
	ctx := meta.(*ArmClient).StopContext

	id, err := azure.ParseAzureResourceID(d.Id())
	if err != nil {
		return err
	}
	resourceGroup := id.ResourceGroup
	name := id.Path["serverfarms"]

	log.Printf("[DEBUG] Deleting App Service Plan %q (Resource Group %q)", name, resourceGroup)

	resp, err := client.Delete(ctx, resourceGroup, name)
	if err != nil {
		if !utils.ResponseWasNotFound(resp) {
			return fmt.Errorf("Error deleting App Service Plan %q (Resource Group %q): %+v", name, resourceGroup, err)
		}
	}

	return nil
}

func expandAzureRmAppServicePlanSku(d *schema.ResourceData) web.SkuDescription {
	configs := d.Get("sku").([]interface{})
	config := configs[0].(map[string]interface{})

	tier := config["tier"].(string)
	size := config["size"].(string)

	sku := web.SkuDescription{
		Name: utils.String(size),
		Tier: utils.String(tier),
		Size: utils.String(size),
	}

	if v, ok := config["capacity"]; ok {
		capacity := v.(int)
		sku.Capacity = utils.Int32(int32(capacity))
	}

	return sku
}

func flattenAppServicePlanSku(input *web.SkuDescription) []interface{} {
	outputs := make([]interface{}, 0)
	if input == nil {
		return outputs
	}

	output := make(map[string]interface{}, 2)

	if input.Tier != nil {
		output["tier"] = *input.Tier
	}

	if input.Size != nil {
		output["size"] = *input.Size
	}

	if input.Capacity != nil {
		output["capacity"] = *input.Capacity
	}

	outputs = append(outputs, output)

	return outputs
}

func expandAppServicePlanProperties(d *schema.ResourceData) *web.AppServicePlanProperties {
	configs := d.Get("properties").([]interface{})
	properties := web.AppServicePlanProperties{}
	if len(configs) == 0 {
		return &properties
	}
	config := configs[0].(map[string]interface{})

	appServiceEnvironmentId := config["app_service_environment_id"].(string)
	if appServiceEnvironmentId != "" {
		properties.HostingEnvironmentProfile = &web.HostingEnvironmentProfile{
			ID: utils.String(appServiceEnvironmentId),
		}
	}

	perSiteScaling := config["per_site_scaling"].(bool)
	properties.PerSiteScaling = utils.Bool(perSiteScaling)

	reserved := config["reserved"].(bool)
	properties.Reserved = utils.Bool(reserved)

	return &properties
}

func flattenAppServiceProperties(props *web.AppServicePlanProperties) []interface{} {
	result := make([]interface{}, 0, 1)
	properties := make(map[string]interface{})

	if props.HostingEnvironmentProfile != nil && props.HostingEnvironmentProfile.ID != nil {
		properties["app_service_environment_id"] = *props.HostingEnvironmentProfile.ID
	}

	if props.PerSiteScaling != nil {
		properties["per_site_scaling"] = *props.PerSiteScaling
	}

	if props.Reserved != nil {
		properties["reserved"] = *props.Reserved
	}

	result = append(result, properties)
	return result
}

func validateAppServicePlanName(v interface{}, k string) (warnings []string, errors []error) {
	value := v.(string)

	if matched := regexp.MustCompile(`^[0-9a-zA-Z-_]{1,60}$`).Match([]byte(value)); !matched {
		errors = append(errors, fmt.Errorf("%q may only contain alphanumeric characters, dashes and underscores up to 60 characters in length", k))
	}

	return warnings, errors
}