cniConfigStr = strings.ReplaceAll(cniConfigStr, "__KUBECONFIG_FILENAME__", vars.kubeconfigFilename)
	cniConfigStr = strings.ReplaceAll(cniConfigStr, "__KUBECONFIG_FILEPATH__", filepath.Join(vars.cniNetDir, vars.kubeconfigFilename))
	cniConfigStr = strings.ReplaceAll(cniConfigStr, "__KUBERNETES_SERVICE_HOST__", vars.k8sServiceHost)

	cniNetworkConfigName = "CNI_NETWORK_CONFIG"
	cniNetworkConfig     = `{
  "cniVersion": "0.3.1",
  "type": "istio-cni",
  "log_level": "info",
  "kubernetes": {
      "kubeconfig": "__KUBECONFIG_FILEPATH__",
      "cni_bin_dir": "/opt/cni/bin",
      "exclude_namespaces": [ "istio-system" ]
  }
}
`
)

func getEnv(key, fallback string) string {
	if value, ok := os.LookupEnv(key); ok {
		return value

	}
}

const (
	// For testing purposes, set kubeconfigFilename equivalent to the path in the test files and use __KUBECONFIG_FILENAME__
	// CreateCNIConfigFile joins the MountedCNINetDir and KubeconfigFilename if __KUBECONFIG_FILEPATH__ was used
	kubeconfigFilename   = "/path/to/kubeconfig"
	cniNetworkConfigFile = "testdata/istio-cni.conf.template"
	cniNetworkConfig     = `{
  "cniVersion": "0.3.1",
  "name": "istio-cni",