if cfg.InstallConfig.AmbientEnabled {
			// Start ambient controller

			// node agent will spawn a goroutine and watch the K8S API for events,
			// as well as listen for messages from the CNI binary.
			log.Info("Starting ambient node agent with inpod redirect mode")
			ambientAgent, err := nodeagent.NewServer(ctx, watchServerReady, cfg.InstallConfig.CNIEventAddress,
				nodeagent.AmbientArgs{

        - If so, calls `istio-iptables` with params to setup pod netns
        - If ambient, sets up the ambient logic.

- `istio-iptables`
    - sets up iptables to redirect a list of ports to the port envoy will listen
    - shared code with istio-init container
    - it will generate an iptables-save config, based on annotations/labels and other settings, and apply it.

### CmdAdd Sidecar Workflow

github.com/docopt/docopt-go v0.0.0-20180111231733-ee0de3bc6815/go.mod h1:WwZ+bS3ebgob9U8Nd0kOddGdZWjyMGR8Wziv+TBNwSE=
github.com/dustin/go-humanize v0.0.0-20171111073723-bb3d318650d4/go.mod h1:HtrtbFcZ19U5GC7JDqmcUSB87Iq5E25KnS6fMYU6eOk=
github.com/dustin/go-humanize v1.0.0/go.mod h1:HtrtbFcZ19U5GC7JDqmcUSB87Iq5E25KnS6fMYU6eOk=