Support automatic kubernetes updates for stackit_ske_cluster (#360)

* new field kubernets_version_min and deprecate kubernetes_version

* Fix lint and tests

* Update acc test

* Deprecate datasource field, fix checkAllowPrivilegedContainers

* Update acc test, datasource and descriptions

* Update acc test

* Improve descriptions, fix bug

* Improve docs, fix acc test

* Update docs

* Update docs, fix acc test

* Update stackit/internal/services/ske/cluster/resource.go

Co-authored-by: Diogo Ferrão <diogo.ferrao@freiheit.com>

* Fix links

* Default ske auto-update to true

---------

Co-authored-by: Diogo Ferrão <diogo.ferrao@freiheit.com>

stackit/internal/validate/validate.go

@@ -16,6 +16,11 @@ import (
 	"github.com/stackitcloud/terraform-provider-stackit/stackit/internal/core"
 )
 
+const (
+	MajorMinorVersionRegex = `^\d+\.\d+?$`
+	FullVersionRegex       = `^\d+\.\d+.\d+?$`
+)
+
 type Validator struct {
 	description         string
 	markdownDescription string
@@ -137,7 +142,7 @@ func MinorVersionNumber() *Validator {
 	return &Validator{
 		description: description,
 		validate: func(ctx context.Context, req validator.StringRequest, resp *validator.StringResponse) {
-			exp := `^\d+\.\d+?$`
+			exp := MajorMinorVersionRegex
 			r := regexp.MustCompile(exp)
 			version := req.ConfigValue.ValueString()
 			if !r.MatchString(version) {
@@ -151,6 +156,30 @@ func MinorVersionNumber() *Validator {
 	}
 }
 
+func VersionNumber() *Validator {
+	description := "value must be a version number, without a leading 'v': '[MAJOR].[MINOR]' or '[MAJOR].[MINOR].[PATCH]'"
+
+	return &Validator{
+		description: description,
+		validate: func(ctx context.Context, req validator.StringRequest, resp *validator.StringResponse) {
+			minorVersionExp := MajorMinorVersionRegex
+			minorVersionRegex := regexp.MustCompile(minorVersionExp)
+
+			versionExp := FullVersionRegex
+			versionRegex := regexp.MustCompile(versionExp)
+
+			version := req.ConfigValue.ValueString()
+			if !minorVersionRegex.MatchString(version) && !versionRegex.MatchString(version) {
+				resp.Diagnostics.Append(validatordiag.InvalidAttributeValueDiagnostic(
+					req.Path,
+					description,
+					req.ConfigValue.ValueString(),
+				))
+			}
+		},
+	}
+}
+
 func RFC3339SecondsOnly() *Validator {
 	description := "value must be in RFC339 format (seconds only)"
 

stackit/internal/validate/validate_test.go

@@ -363,6 +363,80 @@ func TestMinorVersionNumber(t *testing.T) {
 	}
 }
 
+func TestVersionNumber(t *testing.T) {
+	tests := []struct {
+		description string
+		input       string
+		isValid     bool
+	}{
+		{
+			"ok",
+			"1.20",
+			true,
+		},
+		{
+			"ok-2",
+			"1.3",
+			true,
+		},
+		{
+			"ok-3",
+			"10.1",
+			true,
+		},
+		{
+			"ok-patch-version",
+			"1.20.1",
+			true,
+		},
+		{
+			"ok-patch-version-2",
+			"1.20.10",
+			true,
+		},
+		{
+			"ok-patch-version-3",
+			"10.20.10",
+			true,
+		},
+		{
+			"Empty",
+			"",
+			false,
+		},
+		{
+			"not ok",
+			"afssfdfs",
+			false,
+		},
+		{
+			"not ok-major-version",
+			"1",
+			false,
+		},
+		{
+			"not ok-version",
+			"v1.20.1",
+			false,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.description, func(t *testing.T) {
+			r := validator.StringResponse{}
+			VersionNumber().ValidateString(context.Background(), validator.StringRequest{
+				ConfigValue: types.StringValue(tt.input),
+			}, &r)
+
+			if !tt.isValid && !r.Diagnostics.HasError() {
+				t.Fatalf("Should have failed")
+			}
+			if tt.isValid && r.Diagnostics.HasError() {
+				t.Fatalf("Should not have failed: %v", r.Diagnostics.Errors())
+			}
+		})
+	}
+}
+
 func TestRFC3339SecondsOnly(t *testing.T) {
 	tests := []struct {
 		description string