Added - Support for change hostname label to be updatable

Author: Vinicius Monteiro

internal/integrationtest/mysql_mysql_db_system_resource_test.go

@@ -901,3 +901,55 @@ func TestMysqlMysqlDbSystemResource_secureConnections(t *testing.T) {
 		},
 	})
 }
+
+func TestMysqlMysqlDbSystemResource_hostnameLabel(t *testing.T) {
+	httpreplay.SetScenario("TestMysqlMysqlDbSystemResource_hostnameLabel")
+	defer httpreplay.SaveScenario()
+
+	config := acctest.ProviderTestConfig()
+
+	compartmentId := utils.GetEnvSettingWithBlankDefault("compartment_ocid")
+	compartmentIdVariableStr := fmt.Sprintf("variable \"compartment_id\" { default = \"%s\" }\n", compartmentId)
+
+	resourceName := "oci_mysql_mysql_db_system.test_mysql_db_system"
+
+	var resId, resId2 string
+
+	updatedRepresentation := acctest.GetUpdatedRepresentationCopy("hostname_label", acctest.Representation{RepType: acctest.Optional, Create: `hostnameLabel`, Update: `hostnameLabel2`},
+		acctest.RepresentationCopyWithNewProperties(MysqlMysqlDbSystemRepresentation, map[string]interface{}{
+			"backup_policy": acctest.RepresentationGroup{RepType: acctest.Optional, Group: MysqlDbSystemBackupPolicyNotUpdateableRepresentation},
+		}))
+
+	acctest.ResourceTest(t, nil, []resource.TestStep{
+		// verify Create with hostname_label
+		{
+			Config: config + compartmentIdVariableStr + MysqlDbSystemSourceBackupResourceDependencies +
+				acctest.GenerateResourceFromRepresentationMap("oci_mysql_mysql_db_system", "test_mysql_db_system", acctest.Optional, acctest.Create, updatedRepresentation),
+			Check: acctest.ComposeAggregateTestCheckFuncWrapper(
+				resource.TestCheckResourceAttr(resourceName, "hostname_label", "hostnameLabel"),
+
+				func(s *terraform.State) (err error) {
+					resId, err = acctest.FromInstanceState(s, resourceName, "id")
+					return err
+				},
+			),
+		},
+
+		// verify update to hostname_label
+		{
+			Config: config + compartmentIdVariableStr + MysqlDbSystemSourceBackupResourceDependencies +
+				acctest.GenerateResourceFromRepresentationMap("oci_mysql_mysql_db_system", "test_mysql_db_system", acctest.Optional, acctest.Update, updatedRepresentation),
+			Check: acctest.ComposeAggregateTestCheckFuncWrapper(
+				resource.TestCheckResourceAttr(resourceName, "hostname_label", "hostnameLabel2"),
+
+				func(s *terraform.State) (err error) {
+					resId2, err = acctest.FromInstanceState(s, resourceName, "id")
+					if resId != resId2 {
+						return fmt.Errorf("Resource recreated when it was supposed to be updated.")
+					}
+					return err
+				},
+			),
+		},
+	})
+}

internal/service/mysql/mysql_mysql_db_system_resource.go

@@ -270,7 +270,6 @@ func MysqlMysqlDbSystemResource() *schema.Resource {
 				Type:     schema.TypeString,
 				Optional: true,
 				Computed: true,
-				ForceNew: true,
 			},
 			"ip_address": {
 				Type:     schema.TypeString,
@@ -1224,6 +1223,11 @@ func (s *MysqlMysqlDbSystemResourceCrud) Update() error {
 		request.FreeformTags = tfresource.ObjectMapToStringMap(freeformTags.(map[string]interface{}))
 	}
 
+	if hostnameLabel, ok := s.D.GetOkExists("hostname_label"); ok && s.D.HasChange("hostname_label") {
+		tmp := hostnameLabel.(string)
+		request.HostnameLabel = &tmp
+	}
+
 	if isHighlyAvailable, ok := s.D.GetOkExists("is_highly_available"); ok && s.D.HasChange("is_highly_available") {
 		tmp := isHighlyAvailable.(bool)
 		request.IsHighlyAvailable = &tmp

website/docs/r/mysql_mysql_db_system.html.markdown

@@ -150,7 +150,7 @@ The following arguments are supported:
 
 	For a standalone DB System, this defines the fault domain in which the DB System is placed. 
 * `freeform_tags` - (Optional) (Updatable) Simple key-value pair applied without any predefined name, type or scope. Exists for cross-compatibility only. Example: `{"bar-key": "value"}` 
-* `hostname_label` - (Optional) The hostname for the primary endpoint of the DB System. Used for DNS.
+* `hostname_label` - (Optional) (Updatable) The hostname for the primary endpoint of the DB System. Used for DNS.
 
 	The value is the hostname portion of the primary private IP's fully qualified domain name (FQDN) (for example, "dbsystem-1" in FQDN "dbsystem-1.subnet123.vcn1.oraclevcn.com").