"id": "sidecar~1.2.3.4~foo~bar",
    "cluster": "istio-proxy",
    "locality": {
    },

wnstream_rq_4xx,downstream_rq_5xx,downstream_rq_time,downstream_cx_tx_bytes_total,downstream_cx_rx_bytes_total,downstream_cx_total"},"ENVOY_PROMETHEUS_PORT":15090,"ENVOY_STATUS_PORT":15021,"INSTANCE_IPS":"10.3.3.3,10.4.4.4,10.5.5.5,10.6.6.6","ISTIO_VERSION":"binary-1.0","OUTLIER_LOG_PATH":"/dev/stdout","PILOT_SAN":["spiffe://cluster.local/ns/istio-system/sa/istio-pilot-service-account"],"PROXY_CONFIG":{"binaryPath":"/usr/local/bin/envoy","configPath":"/tmp/bootstrap/stats_inclusion","customConfi...

	}
	return "", fmt.Errorf("can not find ROOTCA from secret")
}

func (c *ConfigWriter) getIstioVersionInfo(bootstrapDump *adminv3.BootstrapConfigDump) (version, sha string) {
	const (
		istioVersionKey  = "ISTIO_VERSION"
		istioProxyShaKey = "ISTIO_PROXY_SHA"
	)

	md := bootstrapDump.GetBootstrap().GetNode().GetMetadata().GetFields()

	if versionPB, ok := md[istioVersionKey]; ok {
		version = versionPB.GetStringValue()

    "locality": {
    },

    "locality": {
    },

    "locality": {
    },

	}
	if config.Meta == nil {
		n.Metadata = &pstruct.Struct{
			Fields: map[string]*pstruct.Value{
				"ISTIO_VERSION": {Kind: &pstruct.Value_StringValue{StringValue: "65536.65536.65536"}},
			},
		}
	} else {
		n.Metadata = config.Meta
		if config.Meta.Fields["ISTIO_VERSION"] == nil {
			config.Meta.Fields["ISTIO_VERSION"] = &pstruct.Value{Kind: &pstruct.Value_StringValue{StringValue: "65536.65536.65536"}}
		}
	}
	return n

	t.Helper()
	ads := s.ConnectADS().WithID(sidecarID)

	metadata := &structpb.Struct{Fields: map[string]*structpb.Value{
		"ISTIO_VERSION": {Kind: &structpb.Value_StringValue{StringValue: "1.3"}},
		"NETWORK":       {Kind: &structpb.Value_StringValue{StringValue: network}},
	}}

	ads.RequestResponseAck(t, &discovery.DiscoveryRequest{
		Node: &core.Node{

			option: option.NodeMetadata(&model.BootstrapNodeMetadata{
				NodeMetadata: model.NodeMetadata{
					IstioVersion: "fake",
				},
			}, map[string]any{
				"key": "value",
			}),
			expected: "{\"ISTIO_VERSION\":\"fake\",\"key\":\"value\"}",
		},
		{
			testName: "discovery address",
			key:      "discovery_address",
			option:   option.DiscoveryAddress("fake"),
			expected: "fake",
		},
		{

	// this field should be preferred if it is present.
	ProxyConfig *NodeMetaProxyConfig `json:"PROXY_CONFIG,omitempty"`

	// IstioVersion specifies the Istio version associated with the proxy
	IstioVersion string `json:"ISTIO_VERSION,omitempty"`

	// IstioRevision specifies the Istio revision associated with the proxy.
	// Mostly used when istiod requests the upstream.
	IstioRevision string `json:"ISTIO_REVISION,omitempty"`