apiVersion: networking.istio.io/v1alpha3
kind: DestinationRule
metadata:
  name: db-tls
spec:
  host: mydbserver.prod.svc.cluster.local
  trafficPolicy:
    tls:
      mode: SIMPLE

metadata:
  name: db-tls
spec:
  host: mydbserver.prod.svc.cluster.local
  trafficPolicy:
    portLevelSettings:
      - port:
          number: 443
        tls:
          mode: SIMPLE

apiVersion: networking.istio.io/v1alpha3
kind: DestinationRule
metadata:
  name: db-tls
spec:
  host: mydbserver.prod.svc.cluster.local
  trafficPolicy:
    tls:
      mode: SIMPLE
      credentialName: db-credential
  workloadSelector:
      matchLabels:

metadata:
  name: db-tls
spec:
  host: mydbserver.prod.svc.cluster.local
  trafficPolicy:
    portLevelSettings:
      - port:
          number: 443
        tls:
          mode: SIMPLE
          credentialName: db-credential
  workloadSelector:
      matchLabels:

				},
				err: nil,
			},
		},
		{
			name: "tls mode SIMPLE, with CredentialName specified",
			opts: &buildClusterOpts{
				mutable: newTestCluster(),
			},
			tls: &networking.ClientTLSSettings{
				Mode:            networking.ClientTLSSettings_SIMPLE,
				CredentialName:  credentialName,
				SubjectAltNames: []string{"SAN"},
				Sni:             "some-sni.com",
			},

				CredentialName:    "some credential",
				ClientCertificate: "",
				PrivateKey:        "",
				CaCertificates:    "",
			},
			valid: true,
		},
		{
			name: "SIMPLE CredentialName set with ClientCertificate specified",
			tls: &networking.ClientTLSSettings{
				Mode:              networking.ClientTLSSettings_SIMPLE,
				CredentialName:    "credential",

}

func newTLSGatewayDestinationRule(t framework.TestContext, to echo.Instances, destinationRuleMode string, credentialName string) {
	args := map[string]any{
		"to":             to,
		"Mode":           destinationRuleMode,
		"CredentialName": credentialName,
	}

	// Get namespace for gateway pod.
	istioCfg := istio.DefaultConfigOrFail(t, t)

func newTLSSidecarDestinationRule(t framework.TestContext, to echo.Instances, destinationRuleMode string,
	workloadSelector string, credentialName string, clientNamespace namespace.Instance,
) {
	args := map[string]any{
		"to":               to,
		"Mode":             destinationRuleMode,
		"CredentialName":   credentialName,
		"WorkloadSelector": workloadSelector,
	}
	se := `
apiVersion: networking.istio.io/v1alpha3
kind: ServiceEntry

	if tls == nil {
		return nil, nil
	}
	// Hack to avoid egress sds cluster config generation for sidecar when
	// CredentialName is set in DestinationRule without a workloadSelector.
	// We do not want to support CredentialName setting in non workloadSelector based DestinationRules, because
	// that would result in the CredentialName being supplied to all the sidecars which the DestinationRule is scoped to,

apiVersion: release-notes/v2
kind: bug-fix
area: istioctl  
issue:
- 51567
releaseNotes:
- |