existingConfigFilename: "istio-cni.conf",
		},
	}

	for _, c := range cases {
		t.Run(c.name, func(t *testing.T) {
			// Create temp directory for files
			cniNetDir := t.TempDir()
			cniBinDir := t.TempDir()

			// Create existing config file if specified in test case
			cniConfigFilePath := filepath.Join(cniNetDir, c.configFilename)

	LivenessEndpoint   = "/healthz"
	ReadinessEndpoint  = "/readyz"
	ReadinessPort      = "8000"
	ServiceAccountPath = "/var/run/secrets/kubernetes.io/serviceaccount"
)

// Exposed for testing "constants"
var (
	CNIBinDir     = "/opt/cni/bin"
	HostCNIBinDir = "/host/opt/cni/bin"
	// Well-known subpath we will mount any needed host-mounts under,
	// to preclude shadowing or breaking any pod-internal mounts
	HostMountsPath = "/host"

		K8sServicePort:        os.Getenv("KUBERNETES_SERVICE_PORT"),
		K8sNodeName:           os.Getenv("KUBERNETES_NODE_NAME"),
		K8sServiceAccountPath: constants.ServiceAccountPath,

		CNIBinSourceDir:  constants.CNIBinDir,
		CNIBinTargetDirs: []string{constants.HostCNIBinDir},
		MonitoringPort:   viper.GetInt(constants.MonitoringPort),

		ExcludeNamespaces: viper.GetString(constants.ExcludeNamespaces),

is a GKE cluster.

```bash
ISTIO_CNI_ARGS=
# TODO: What k8s data can we use for this check for whether GKE?
if [[ "${ISTIO_CLUSTER_ISGKE}" == "true" ]]; then
    ISTIO_CNI_ARGS="--set cni.cniBinDir=/home/kubernetes/bin"
fi
iop kube-system istio-cni $IBASE/istio-cni/ ${ISTIO_CNI_ARGS}
```

TODO. It is possible to add Istio-CNI later, and gradually migrate.

### Install Control plane

	"ambient_enabled": %t,
    "kubernetes": {
        "k8sapiroot": "APIRoot",
        "kubeconfig": "testK8sConfig",
        "nodename": "testNodeName",
        "excludenamespaces": "testNS",
        "cnibindir": "/testDirectory"
    }
    }`

	pod, ns := buildFakePodAndNSForClient()
	testDoAddRun(t, fmt.Sprintf(confNoPrevResult, false), testNSName, pod, ns)

{
  "cniVersion": "0.3.1",
  "name": "istio-cni",
  "type": "prefix-istio-cni",
  "plugin_log_level": "debug",
  "kubernetes": {
      "kubeconfig": "/path/to/kubeconfig",
      "cni_bin_dir": "/path/cni/bin"
  }

      },
      "type": "bridge"
    },
    {
      "sysctl": {
        "net.core.somaxconn": "500"
      },
      "type": "tuning"
    },
    {
      "kubernetes": {
        "cni_bin_dir": "/path/cni/bin",
        "kubeconfig": "/path/to/kubeconfig"
      },
      "name": "istio-cni",
      "plugin_log_level": "debug",
      "type": "istio-cni"
    }
  ]

{
  "cniVersion": "0.3.1",
  "name": "istio-cni",
  "type": "istio-cni",
  "plugin_log_level": "__LOG_LEVEL__",
  "kubernetes": {
      "kubeconfig": "__KUBECONFIG_FILENAME__",
      "cni_bin_dir": "/path/cni/bin"
  }

	cniNetworkConfig     = `{
  "cniVersion": "0.3.1",
  "name": "istio-cni",
  "type": "istio-cni",
  "plugin_log_level": "__LOG_LEVEL__",
  "kubernetes": {
      "kubeconfig": "__KUBECONFIG_FILENAME__",
      "cni_bin_dir": "/path/cni/bin"
  }
}
`
)

func TestCreateCNIConfigFile(t *testing.T) {
	cases := []struct {
		name              string
		chainedCNIPlugin  bool
		specifiedConfName string