cniConfigStr = strings.ReplaceAll(cniConfigStr, "__LOG_LEVEL__", vars.logLevel)
	cniConfigStr = strings.ReplaceAll(cniConfigStr, "__LOG_UDS_ADDRESS__", vars.logUDSAddress)
	cniConfigStr = strings.ReplaceAll(cniConfigStr, "__CNI_EVENT_ADDRESS__", vars.cniEventAddress)
	cniConfigStr = strings.ReplaceAll(cniConfigStr, "__KUBECONFIG_FILENAME__", vars.kubeconfigFilename)

	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

  // Accessible property names are escaped according to the following rules when accessed in the expression:
  // - '__' escapes to '__underscores__'
  // - '.' escapes to '__dot__'
  // - '-' escapes to '__dash__'
  // - '/' escapes to '__slash__'
  // - Property names that exactly match a CEL RESERVED keyword escape to '__{keyword}__'. The keywords are:

	// 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",
  "type": "istio-cni",
  "log_level": "__LOG_LEVEL__",
  "kubernetes": {

                "id": "links",
                "value": [
                  {
                    "targetBlank": false,
                    "title": "$__cell dashboard",
                    "url": "/dashboard/db/istio-workload-dashboard?var-workload=${__cell_2:raw}&var-namespace=${__cell_3:raw}"
                  }
                ]
              },
              {
                "id": "custom.align"
              }