feat(dds): support primary standby switch

docs/resources/dds_primary_standby_switch.md

@@ -0,0 +1,57 @@
+---
+subcategory: "Document Database Service (DDS)"
+layout: "huaweicloud"
+page_title: "HuaweiCloud: huaweicloud_dds_primary_standby_switch"
+description: |-
+  Manages a DDS primary standby switch resource within HuaweiCloud.
+---
+
+# huaweicloud_dds_primary_standby_switch
+
+Manages a DDS primary standby switch resource within HuaweiCloud.
+
+## Example Usage
+
+### Perform switch for a replica set instance
+
+```hcl
+variable "instance_id" {}
+
+resource "huaweicloud_dds_primary_standby_switch" "test" {
+  instance_id = var.instance_id
+}
+```
+
+### Promote standby node to primary for replica set node, shard node or config node
+
+```hcl
+variable "instance_id" {}
+variable "node_id" {}
+
+resource "huaweicloud_dds_primary_standby_switch" "test" {
+  instance_id = var.instance_id
+  node_id     = var.node_id
+}
+```
+
+## Argument Reference
+
+The following arguments are supported:
+
+* `region` - (Optional, String, ForceNew) Specifies the region in which to create the resource.
+  If omitted, the provider-level region will be used.
+  Changing this creates a new resource.
+
+* `instance_id` - (Required, String, ForceNew) Specifies the instance ID.
+  Changing this creates a new resource.
+
+* `node_id` - (Optional, String, ForceNew) Specifies the ID of replica set node, shard node or config node.
+  Changing this creates a new resource.
+
+  -> If `node_id` is not specified, perform a primary/secondary switchover in a replica set instance.
+
+## Attribute Reference
+
+In addition to all arguments above, the following attributes are exported:
+
+* `id` - The resource ID.

huaweicloud/provider.go

@@ -1438,6 +1438,7 @@ func Provider() *schema.Provider {
 			"huaweicloud_dds_instance_eip_associate":      dds.ResourceDDSInstanceBindEIP(),
 			"huaweicloud_dds_instance_restore":            dds.ResourceDDSInstanceRestore(),
 			"huaweicloud_dds_instance_parameters_modify":  dds.ResourceDDSInstanceParametersModify(),
+			"huaweicloud_dds_primary_standby_switch":      dds.ResourceDDSPrimaryStandbySwitch(),
 			"huaweicloud_dds_recycle_policy":              dds.ResourceDDSRecyclePolicy(),
 
 			"huaweicloud_ddm_instance":               ddm.ResourceDdmInstance(),

huaweicloud/services/acceptance/dds/resource_huaweicloud_dds_primary_standby_switch_test.go

@@ -0,0 +1,71 @@
+package dds
+
+import (
+	"fmt"
+	"testing"
+
+	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/resource"
+
+	"github.com/huaweicloud/terraform-provider-huaweicloud/huaweicloud/services/acceptance"
+)
+
+func TestAccDDSPrimaryStandbySwitch_basic(t *testing.T) {
+	rName := acceptance.RandomAccResourceName()
+
+	resource.ParallelTest(t, resource.TestCase{
+		PreCheck:          func() { acceptance.TestAccPreCheck(t) },
+		ProviderFactories: acceptance.TestAccProviderFactories,
+		CheckDestroy:      nil,
+		Steps: []resource.TestStep{
+			{
+				Config: testAccDDSPrimaryStandbySwitch_Instance(rName),
+				Check:  resource.ComposeTestCheckFunc(),
+			},
+		},
+	})
+}
+
+func testAccDDSPrimaryStandbySwitch_Instance(rName string) string {
+	return fmt.Sprintf(`
+%s
+
+resource "huaweicloud_dds_primary_standby_switch" "test" {
+  instance_id = huaweicloud_dds_instance.instance.id
+}`, testAccDDSInstanceReplicaSetBasic(rName))
+}
+
+func TestAccDDSPrimaryStandbySwitch_node(t *testing.T) {
+	rName := acceptance.RandomAccResourceName()
+
+	resource.ParallelTest(t, resource.TestCase{
+		PreCheck:          func() { acceptance.TestAccPreCheck(t) },
+		ProviderFactories: acceptance.TestAccProviderFactories,
+		CheckDestroy:      nil,
+		Steps: []resource.TestStep{
+			{
+				Config: testAccDDSPrimaryStandbySwitch_Node(rName),
+				Check:  resource.ComposeTestCheckFunc(),
+			},
+		},
+	})
+}
+
+func testAccDDSPrimaryStandbySwitch_Node(rName string) string {
+	return fmt.Sprintf(`
+%s
+
+locals {
+  node_ids = [for node in huaweicloud_dds_instance.instance.nodes: node.id if node.role == "Secondary"]
+}
+
+resource "huaweicloud_dds_primary_standby_switch" "test" {
+  instance_id = huaweicloud_dds_instance.instance.id
+  node_id     = local.node_ids[0]
+
+  lifecycle {
+    ignore_changes = [
+      node_id,
+    ]
+  }
+}`, testAccDDSInstanceV3Config_basic(rName, 8800))
+}

huaweicloud/services/dds/resource_huaweicloud_dds_primary_standby_switch.go

@@ -0,0 +1,164 @@
+package dds
+
+import (
+	"context"
+	"fmt"
+	"strings"
+	"time"
+
+	"github.com/hashicorp/go-uuid"
+	"github.com/hashicorp/terraform-plugin-sdk/v2/diag"
+	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/resource"
+	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema"
+
+	"github.com/chnsz/golangsdk"
+
+	"github.com/huaweicloud/terraform-provider-huaweicloud/huaweicloud/config"
+	"github.com/huaweicloud/terraform-provider-huaweicloud/huaweicloud/utils"
+)
+
+// @API DDS POST /v3/{project_id}/instances/{instance_id}/switchover
+// @API DDS POST /v3/{project_id}/instances/{instance_id}/nodes/{node_id}/primary
+// @API DDS GET /v3/{project_id}/jobs
+func ResourceDDSPrimaryStandbySwitch() *schema.Resource {
+	return &schema.Resource{
+		CreateContext: resourceDDSPrimaryStandbySwitchCreate,
+		ReadContext:   resourceDDSPrimaryStandbySwitchRead,
+		DeleteContext: resourceDDSPrimaryStandbySwitchDelete,
+
+		Schema: map[string]*schema.Schema{
+			"region": {
+				Type:     schema.TypeString,
+				Optional: true,
+				Computed: true,
+				ForceNew: true,
+			},
+			"instance_id": {
+				Type:     schema.TypeString,
+				Required: true,
+				ForceNew: true,
+			},
+			"node_id": {
+				Type:     schema.TypeString,
+				Optional: true,
+				ForceNew: true,
+			},
+		},
+	}
+}
+
+func resourceDDSPrimaryStandbySwitchCreate(ctx context.Context, d *schema.ResourceData, meta interface{}) diag.Diagnostics {
+	cfg := meta.(*config.Config)
+	region := cfg.GetRegion(d)
+	client, err := cfg.NewServiceClient("dds", region)
+	if err != nil {
+		return diag.Errorf("error creating DDS client: %s", err)
+	}
+
+	var jobID string
+
+	if _, ok := d.GetOk("node_id"); ok {
+		// switch by node, it's a synchronous task
+		// but need to wait the node become primary for a few seconds
+		err = promoteStandbyNodeToPrimary(client, d)
+		if err != nil {
+			return diag.FromErr(err)
+		}
+
+		// lintignore:R018
+		time.Sleep(30 * time.Second)
+	} else {
+		// switch instance, it's a asynchronous task
+		jobID, err = performSwitchForInstance(client, d)
+		if err != nil {
+			return diag.FromErr(err)
+		}
+	}
+
+	id, err := uuid.GenerateUUID()
+	if err != nil {
+		return diag.Errorf("unable to generate ID: %s", err)
+	}
+	d.SetId(id)
+
+	// wait for job complete
+	if jobID != "" {
+		stateConf := &resource.StateChangeConf{
+			Pending:      []string{"Running"},
+			Target:       []string{"Completed"},
+			Refresh:      JobStateRefreshFunc(client, jobID),
+			Timeout:      d.Timeout(schema.TimeoutUpdate),
+			Delay:        10 * time.Second,
+			PollInterval: 10 * time.Second,
+		}
+
+		_, err = stateConf.WaitForStateContext(ctx)
+		if err != nil {
+			return diag.Errorf("error waiting for the job (%s) completed: %s ", jobID, err)
+		}
+	}
+
+	return nil
+}
+
+func promoteStandbyNodeToPrimary(client *golangsdk.ServiceClient, d *schema.ResourceData) error {
+	createHttpUrl := "v3/{project_id}/instances/{instance_id}/nodes/{node_id}/primary"
+	createPath := client.Endpoint + createHttpUrl
+	createPath = strings.ReplaceAll(createPath, "{project_id}", client.ProjectID)
+	createPath = strings.ReplaceAll(createPath, "{instance_id}", d.Get("instance_id").(string))
+	createPath = strings.ReplaceAll(createPath, "{node_id}", d.Get("node_id").(string))
+	createOpt := golangsdk.RequestOpts{
+		KeepResponseBody: true,
+		MoreHeaders: map[string]string{
+			"Content-Type": "application/json",
+		},
+	}
+
+	_, err := client.Request("POST", createPath, &createOpt)
+	if err != nil {
+		return fmt.Errorf("error promoting standby node to primary: %s", err)
+	}
+
+	return nil
+}
+
+func performSwitchForInstance(client *golangsdk.ServiceClient, d *schema.ResourceData) (string, error) {
+	createHttpUrl := "v3/{project_id}/instances/{instance_id}/switchover"
+	createPath := client.Endpoint + createHttpUrl
+	createPath = strings.ReplaceAll(createPath, "{project_id}", client.ProjectID)
+	createPath = strings.ReplaceAll(createPath, "{instance_id}", d.Get("instance_id").(string))
+	createOpt := golangsdk.RequestOpts{
+		KeepResponseBody: true,
+	}
+
+	createResp, err := client.Request("POST", createPath, &createOpt)
+	if err != nil {
+		return "", fmt.Errorf("error performing primary standby switch for instance: %s", err)
+	}
+	createRespBody, err := utils.FlattenResponse(createResp)
+	if err != nil {
+		return "", fmt.Errorf("error flattening response: %s", err)
+	}
+
+	jobID := utils.PathSearch("job_id", createRespBody, "").(string)
+	if jobID == "" {
+		return "", fmt.Errorf("unable to find job ID in API response")
+	}
+
+	return jobID, nil
+}
+
+func resourceDDSPrimaryStandbySwitchRead(_ context.Context, _ *schema.ResourceData, _ interface{}) diag.Diagnostics {
+	return nil
+}
+
+func resourceDDSPrimaryStandbySwitchDelete(_ context.Context, _ *schema.ResourceData, meta interface{}) diag.Diagnostics {
+	errorMsg := "Deleting primary standby switch resource is not supported. The resource is only removed from the state," +
+		" the instance remains in the cloud."
+	return diag.Diagnostics{
+		diag.Diagnostic{
+			Severity: diag.Warning,
+			Summary:  errorMsg,
+		},
+	}
+}