remove vip restrictions (#2493)

* remove vip restrictions

* remove vip restrictions

Author: hellertang

.changelog/2493.txt

@@ -0,0 +1,3 @@
+```release-note:enhancement
+resource/tencentcloud_clb_instance: Remove `vip` restrictions
+```

tencentcloud/services/clb/resource_tc_clb_instance.go

@@ -173,7 +173,7 @@ func ResourceTencentCloudClbInstance() *schema.Resource {
 				Optional:    true,
 				ForceNew:    true,
 				Computed:    true,
-				Description: "Applies for CLB instances for a specified VIP, only applicable to open CLB.",
+				Description: "Specifies the VIP for the application of a CLB instance. This parameter is optional. If you do not specify this parameter, the system automatically assigns a value for the parameter. IPv4 and IPv6 CLB instances support this parameter, but IPv6 NAT64 CLB instances do not.",
 			},
 			"load_balancer_pass_to_target": {
 				Type:        schema.TypeBool,
@@ -282,9 +282,6 @@ func resourceTencentCloudClbInstanceCreate(d *schema.ResourceData, meta interfac
 
 	//vip
 	if v, ok := d.GetOk("vip"); ok {
-		if networkType == CLB_NETWORK_TYPE_INTERNAL {
-			return fmt.Errorf("[CHECK][CLB instance][Create] check: INTERNAL network_type do not support vip setting")
-		}
 		request.Vip = helper.String(v.(string))
 	}
 

website/docs/r/clb_instance.html.markdown

@@ -284,7 +284,7 @@ The following arguments are supported:
 * `target_region_info_region` - (Optional, String) Region information of backend services are attached the CLB instance. Only supports `OPEN` CLBs.
 * `target_region_info_vpc_id` - (Optional, String) Vpc information of backend services are attached the CLB instance. Only supports `OPEN` CLBs.
 * `vip_isp` - (Optional, String, ForceNew) Network operator, only applicable to open CLB. Valid values are `CMCC`(China Mobile), `CTCC`(Telecom), `CUCC`(China Unicom) and `BGP`. If this ISP is specified, network billing method can only use the bandwidth package billing (BANDWIDTH_PACKAGE).
-* `vip` - (Optional, String, ForceNew) Applies for CLB instances for a specified VIP, only applicable to open CLB.
+* `vip` - (Optional, String, ForceNew) Specifies the VIP for the application of a CLB instance. This parameter is optional. If you do not specify this parameter, the system automatically assigns a value for the parameter. IPv4 and IPv6 CLB instances support this parameter, but IPv6 NAT64 CLB instances do not.
 * `vpc_id` - (Optional, String, ForceNew) VPC ID of the CLB.
 * `zone_id` - (Optional, String) Available zone id, only applicable to open CLB.