meshConfig := &meshconfig.MeshConfig{
		DefaultConfig: &meshconfig.ProxyConfig{
			ProxyMetadata: map[string]string{},
		},
	}
	if err := protomarshal.ApplyYAML(istio.Data[istioctlutil.ConfigMapKey], meshConfig); err != nil {
		return nil, err
	}
	if isRevisioned(revision) && meshConfig.DefaultConfig.DiscoveryAddress == "" {