p.mu.Lock()
	defer p.mu.Unlock()
	if existing := p.currentPodCache[uid]; existing.Netns != nil {
		if existing.Netns.Inode() == workload.Netns.Inode() {
			workload.Netns.Close()
			// Replace the workload, but keep the old Netns
			p.currentPodCache[uid] = WorkloadInfo{
				Workload: workload.Workload,
				Netns:    existing.Netns,
			}
			// already in cache
			return existing.Netns
		}

If set to true, the user is not prompted and a Yes response is assumed in all cases.`
	overrideHelpStr = `If true, allow revision tags to be overwritten, otherwise reject revision tag updates that
overwrite existing revision tags.`
	revisionHelpStr = "Control plane revision to reference from a given revision tag"
	tagCreatedStr   = `Revision tag %q created, referencing control plane revision %q. To enable injection using this

			cniNetDir := t.TempDir()
			cniBinDir := t.TempDir()

			// Create existing config file if specified in test case
			cniConfigFilePath := filepath.Join(cniNetDir, c.configFilename)
			if err := file.AtomicCopy(filepath.Join("testdata", c.existingConfigFilename), cniNetDir, c.configFilename); err != nil {
				t.Fatal(err)
			}

			// Create existing binary files

		newMap = existingMap
		plugins, err := util.GetPlugins(newMap)
		if err != nil {
			return nil, fmt.Errorf("existing CNI config: %v", err)
		}

		for i, rawPlugin := range plugins {
			plugin, err := util.GetPlugin(rawPlugin)
			if err != nil {
				return nil, fmt.Errorf("existing CNI plugin: %v", err)
			}
			if plugin["type"] == "istio-cni" {
				plugins = append(plugins[:i], plugins[i+1:]...)
				break

and understand each binary that gets deployed, and select which combination to use.

Note: each component can be installed in parallel with an existing Istio 1.0 or 1.1 installation in
`istio-system`. The new components will not interfere with existing apps, but can interoperate,
and it is possible to gradually move apps from Istio 1.0/1.1 to the new environments and
across environments ( for example canary -> prod )

## Goals

Ztunnel should:
* **Not break users**. This means that deploying Ztunnel should retain all existing Kubernetes behavior.
  * This includes UDP, non-compliant HTTP, server-first protocols, stateful sets, external services, etc.

		// pod was added to our cache
		// we get here in 2 cases:
		// 1. new pod was created on our node
		// 2. we were restarted and current existing pods are added to our cache

		// We have no good way to distinguish between these two cases from here. But we don't need to!
		// Existing pods will be handled by the dataplane using `GetAmbientPods`,
		// and the initial enqueueNamespace, and new pods will be handled by the CNI.

  // Version is the API Version of the Resource.  "*" means all.
  // +optional
  optional string version = 4;

  // Resource is one of the existing resource types.  "*" means all.
  // +optional
  optional string resource = 5;

  // Subresource is one of the existing resource types.  "" means none.
  // +optional
  optional string subresource = 6;

	if err := unix.Setns(int(n.Fd()), unix.CLONE_NEWNET); err != nil {
		return fmt.Errorf("Error switching to ns fd %v: %v", n.Fd(), err)
	}
	return nil
}

// inspired by netns.Do() but with an existing fd.
func NetnsDo(fdable NetnsFd, toRun func() error) error {
	containedCall := func() error {
		threadNS, err := netns.GetCurrentNS()
		if err != nil {
			return fmt.Errorf("failed to open current netns: %v", err)
		}

  // Version is the API Version of the Resource.  "*" means all.
  // +optional
  optional string version = 4;

  // Resource is one of the existing resource types.  "*" means all.
  // +optional
  optional string resource = 5;

  // Subresource is one of the existing resource types.  "" means none.
  // +optional
  optional string subresource = 6;