}
	}
	return loggingOptions
}

// CmdAdd is called for ADD requests
func CmdAdd(args *skel.CmdArgs) (err error) {
	// Defer a panic recover, so that in case if panic we can still return
	// a proper error to the runtime.
	defer func() {
		if e := recover(); e != nil {
			msg := fmt.Sprintf("istio-cni panicked during cmdAdd: %v\n%v", e, string(debug.Stack()))
			if err != nil {

		// this may fail, but it should be safe to ignore according
		// to https://github.com/uber-go/zap/issues/328
		_ = log.Sync()
	}()

	// TODO: implement plugin version
	funcs := skel.CNIFuncs{
		Add:   plugin.CmdAdd,
		Del:   plugin.CmdDelete,
		Check: plugin.CmdCheck,
	}
	err := skel.PluginMainFuncsWithError(funcs, version.All, fmt.Sprintf("CNI plugin istio-cni %v", istioversion.Info.Version))
	if err != nil {

- `istio-cni`
    - CNI plugin executable copied to `/opt/cni/bin`
    - currently implemented for k8s only
    - on pod add, determines whether pod should have netns setup to redirect to Istio proxy. See [cmdAdd](#cmdadd-workflow) for detailed logic.
        - it connects to K8S using the kubeconfig and JWT token copied from install-cni to get Pod and Namespace. Since this is a short-running command, each invocation creates a new connection.

)

// Internal constants
const (
	DefaultKubeconfigMode = 0o600
	CNIAgentLogScope      = "cni-agent"
	CNIPluginLogScope     = "cni-plugin"
	CNIAddEventPath       = "/cmdadd"
	UDSLogPath            = "/log"
	CNIEventSocketName    = "pluginevent.sock"
	LogUDSSocketName      = "log.sock"
	CNIPluginKubeconfName = "istio-cni-kubeconfig"
	// K8s liveness and readiness endpoints

	//
	// TODO one place this *can* fail is
	// - if a CNI plugin after us in the chain fails (currently, we are explicitly the last in the chain by design)
	// - the CmdAdd comes back thru here with a new IP
	// - we will never clean up that old IP that we "lost"
	// To fix this we probably need to impl CmdDel + manage our own podUID/IP mapping.
	if retErr == nil {