// K8S may get a pod Add event without any IPs in the object, and the pod will later be updated with IPs.
//
// We always need the IPs, but this is fine because this AddPodToMesh can be called from the CNI plugin as well,
// which always has the firsthand info of the IPs, even before K8S does - so we pass them separately here because
// we actually may have them before K8S in the Pod object.

		return nil
	}
	return err
}

// Get any IPs currently assigned to the Pod.
//
// If 'PodIPs' exists, it is preferred (and should be guaranteed to contain the address in 'PodIP'),
// otherwise fallback to 'PodIP'.
//
// Note that very early in the pod's lifecycle (before all the node CNI plugin invocations finish)
// K8S may not have received the pod IPs yet, and may not report the pod as having any.

}

// addPodToHostNSIpset:
// 1. get pod manifest
// 2. Get all pod ips (might be several, v6/v4)
// 3. update ipsets accordingly
// 4. return the ones we added successfully, and errors for any we couldn't (dupes)
//
// Dupe IPs should be considered an IPAM error and should never happen.

	fakePodIP := "11.1.1.12"
	_, addr, _ := net.ParseCIDR(fakePodIP + "/32")
	valid := CNIPluginAddEvent{
		Netns:        "/var/netns/foo",
		PodName:      "pod-bingo",
		PodNamespace: "funkyns",
		IPs: []IPConfig{{
			Address: *addr,
		}},
	}

	setupLogging()
	NodeName = "testnode"
	ctx, cancel := context.WithCancel(context.Background())
	defer cancel()
	pod := &corev1.Pod{

///

## Conceitos de Implantação

Esses exemplos executam o programa do servidor (por exemplo, Uvicorn), iniciando **um único processo**, ouvindo em todos os IPs (`0.0.0.0`) em uma porta predefinida (por exemplo, `80`).

Esta é a ideia básica. Mas você provavelmente vai querer cuidar de algumas coisas adicionais, como:

* Segurança - HTTPS
* Executando na inicialização

server["Server on http://127.0.0.1:8000/app"]

browser --> proxy
proxy --> server
```

/// tip | "Dica"

O IP `0.0.0.0` é comumente usado para significar que o programa escuta em todos os IPs disponíveis naquela máquina/servidor.

///

A interface de documentação também precisaria do OpenAPI schema para declarar que API `server` está localizado em `/api/v1` (atrás do proxy). Por exemplo:

```JSON hl_lines="4-8"

///

## Deployment Concepts

These examples run the server program (e.g Uvicorn), starting **a single process**, listening on all the IPs (`0.0.0.0`) on a predefined port (e.g. `80`).

This is the basic idea. But you will probably want to take care of some additional things, like:

* Security - HTTPS
* Running on startup
* Restarts

// constructor initializes.
func DomainNames(domainNames []string) EtcdOption {
	return func(args *CoreDNS) {
		args.domainNames = domainNames
	}
}

// DomainIPs set a list of custom domain IPs, note this will
// fail if set to empty when constructor initializes.
func DomainIPs(domainIPs set.StringSet) EtcdOption {
	return func(args *CoreDNS) {
		args.domainIPs = domainIPs
	}
}

					continue
				}

				// if domain IPs intersect then it won't be an empty set.
				// such an intersection means that bucket exists on etcd.
				// but if we do see a difference with local domain IPs with
				// hostSlice from etcd then we should update with newer
				// domainIPs, we proceed to do that here.
				bucketsToBeUpdated.Add(bucket)
				continue
			}

			// then we will just fail to add the pod to the mesh, and it will be retried later when cni plugin adds it.

			// We need a pod IP - if the pod was added via the CNI plugin, that plugin told us the IPs
			// for the pod. If this is a pod added via informer, the pod should have already gone thru
			// the CNI plugin chain, and have a PodIP.
			//
			// If PodIPs exists, it is preferred, otherwise fallback to PodIP.
			//