Fix - MariaDB firewall rule name restrictions does not match official

azurerm/internal/services/mariadb/mariadb_firewall_rule_resource.go

@@ -3,12 +3,10 @@ package mariadb
 import (
 	"fmt"
 	"log"
-	"regexp"
 	"time"
 
 	"github.com/Azure/azure-sdk-for-go/services/mariadb/mgmt/2018-06-01/mariadb"
 	"github.com/hashicorp/terraform-plugin-sdk/helper/schema"
-	"github.com/hashicorp/terraform-plugin-sdk/helper/validation"
 	"github.com/terraform-providers/terraform-provider-azurerm/azurerm/helpers/azure"
 	"github.com/terraform-providers/terraform-provider-azurerm/azurerm/helpers/tf"
 	azValidate "github.com/terraform-providers/terraform-provider-azurerm/azurerm/helpers/validate"
@@ -37,13 +35,10 @@ func resourceArmMariaDBFirewallRule() *schema.Resource {
 
 		Schema: map[string]*schema.Schema{
 			"name": {
-				Type:     schema.TypeString,
-				Required: true,
-				ForceNew: true,
-				ValidateFunc: validation.StringMatch(
-					regexp.MustCompile("^[-a-z0-9]{1,128}$"),
-					"name must be 1-128 characters long and contain only letters, numbers and hyphens",
-				),
+				Type:         schema.TypeString,
+				Required:     true,
+				ForceNew:     true,
+				ValidateFunc: validate.FirewallRuleName,
 			},
 
 			"resource_group_name": azure.SchemaResourceGroupName(),

azurerm/internal/services/mariadb/mariadb_firewall_rule_resource_test.go

@@ -98,7 +98,7 @@ resource "azurerm_mariadb_server" "test" {
 }
 
 resource "azurerm_mariadb_firewall_rule" "test" {
-  name                = "acctestfwrule-%d"
+  name                = "acctestFWRule_01-%d"
   resource_group_name = "${azurerm_resource_group.test.name}"
   server_name         = "${azurerm_mariadb_server.test.name}"
   start_ip_address    = "0.0.0.0"

azurerm/internal/services/mariadb/validate/firewall_rule_name.go

@@ -0,0 +1,25 @@
+package validate
+
+import (
+	"fmt"
+	"regexp"
+)
+
+func FirewallRuleName(i interface{}, k string) (warnings []string, errors []error) {
+	v, ok := i.(string)
+	if !ok {
+		errors = append(errors, fmt.Errorf("expected type of %s to be string", k))
+		return
+	}
+
+	// The name attribute rules are :
+	// 1. can contain only letters, numbers, underscore and hyphen.
+	// 2. The value must be between 1 and 128 characters long
+
+	if !regexp.MustCompile(`^[a-zA-Z\d-_]{1,128}$`).MatchString(v) {
+		errors = append(errors, fmt.Errorf("%s can contain only letters, numbers, underscore and hyphen, and be between 1 and 128 characters long", k))
+		return
+	}
+
+	return warnings, errors
+}

azurerm/internal/services/mariadb/validate/firewall_rule_name_test.go

@@ -0,0 +1,58 @@
+package validate
+
+import (
+	"testing"
+)
+
+func TestFirewallRuleName(t *testing.T) {
+	testData := []struct {
+		input    string
+		expected bool
+	}{
+		{
+			// empty
+			input:    "",
+			expected: false,
+		},
+		{
+			// basic example
+			input:    "abc123",
+			expected: true,
+		},
+		{
+			// can contain underscore
+			input:    "aBc_123",
+			expected: true,
+		},
+		{
+			// can contain hyphen
+			input:    "ab-c",
+			expected: true,
+		},
+		{
+			// can't contain `*`
+			input:    "abcon*demand",
+			expected: false,
+		},
+		{
+			// 128 chars
+			input:    "abcdefghijklmnopqrstuvwxyzabcdefabcdefghijklmnopqrstuvwxyzabcdefabcdefghijklmnopqrstuvwxyzabcdefabcdefghijklmnopqrstuvwxyzabcdef",
+			expected: true,
+		},
+		{
+			// 129 chars
+			input:    "abcdefghijklmnopqrstuvwxyzabcdefabcdefghijklmnopqrstuvwxyzabcdefabcdefghijklmnopqrstuvwxyzabcdefabcdefghijklmnopqrstuvwxyzabcdefg",
+			expected: false,
+		},
+	}
+
+	for _, v := range testData {
+		t.Logf("[DEBUG] Testing %q..", v.input)
+
+		_, errors := FirewallRuleName(v.input, "name")
+		actual := len(errors) == 0
+		if v.expected != actual {
+			t.Fatalf("Expected %t but got %t", v.expected, actual)
+		}
+	}
+}

azurerm/internal/services/synapse/validate/firewall_rule_name.go

@@ -13,11 +13,11 @@ func FirewallRuleName(i interface{}, k string) (warnings []string, errors []erro
 	}
 
 	// The name attribute rules are :
-	// 1. can contain only letters, numbers, underscore and hythen.
+	// 1. can contain only letters, numbers, underscore and hyphen.
 	// 2. The value must be between 1 and 128 characters long
 
 	if !regexp.MustCompile(`^[a-zA-Z\d-_]{1,128}$`).MatchString(v) {
-		errors = append(errors, fmt.Errorf("%s can contain only letters, numbers, underscore and hythen, and be between 1 and 128 characters long", k))
+		errors = append(errors, fmt.Errorf("%s can contain only letters, numbers, underscore and hyphen, and be between 1 and 128 characters long", k))
 		return
 	}