## Detalhes Técnicos

Versões modernas de Python tem suporte para **"código assíncrono"** usando algo chamado **"corrotinas"**, com sintaxe **`async` e `await`**.

Vamos ver aquela frase por partes na seção abaixo:

* **Código assíncrono**
* **`async` e `await`**
* **Corrotinas**

## Código assíncrono

		for _, c := range ctx.Clusters() {
			ver, err := c.GetKubernetesVersion()
			if err != nil {
				return fmt.Errorf("failed to get Kubernetes version: %v", err)
			}
			if !kubelib.IsAtLeastVersion(c, minorVersion) {
				s.Skip(fmt.Sprintf("Required Kubernetes version (1.%v) is greater than current: %v",
					minorVersion, ver.String()))
			}
		}
		return nil
	}

		return ESSUnknown, "", fmt.Errorf("unable to get ES Server version - json parse error: %v", err)
	}

	if v, ok := m["version"].(map[string]interface{}); ok {
		if ver, ok := v["number"].(string); ok {
			status, err := getESVersionSupportStatus(ver)
			return status, ver, err
		}
	}
	return ESSUnknown, "", fmt.Errorf("Unable to get ES Server Version - got INFO response: %v", m)
}

func (c *esClientV7) isAtleastV7() bool {

	var latestVersion *versionutil.Version
	for versionStr, nodes := range kubeAPIServerVersions {
		ver, err := versionutil.ParseSemantic(versionStr)
		if err != nil {
			return nil, fmt.Errorf("couldn't parse kube-apiserver version %s from nodes %v", versionStr, nodes)
		}
		if latestVersion == nil || ver.AtLeast(latestVersion) {
			latestVersion = ver
		}
	}

	return latestVersion, nil

	for rev, ver := range istioVersions {
		text += fmt.Sprintf("Revision %s:\n%s\n\n", rev, ver)
	}
	text += "The following proxy revisions/versions were found in the cluster:\n"
	for rev, ver := range proxyVersions {
		text += fmt.Sprintf("Revision %s: Versions {%s}\n", rev, strings.Join(ver, ", "))
	}
	common.LogAndPrintf(text)

	ver, err := kubeadmutil.KubernetesReleaseVersion(cfg.KubernetesVersion)
	if err != nil {
		return err
	}

	// Requested version is automatic CI build, thus mark CIKubernetesVersion as `ci/<resolved-version>`
	if isCIVersion {
		cfg.CIKubernetesVersion = fmt.Sprintf("%s%s", constants.CIKubernetesVersionPrefix, ver)
	}

	cfg.KubernetesVersion = ver

	t := translate.NewTranslator()
	ver, err := v.client.GetKubernetesVersion()
	if err != nil {
		return 0, 0, 0, err
	}
	cp, err := controlplane.NewIstioControlPlane(iop.Spec, t, nil, ver)
	if err != nil {
		return 0, 0, 0, err
	}
	if err := cp.Run(); err != nil {
		return 0, 0, 0, err
	}

	// More changes would be required if the kubelet version one day decouples from that of Kubernetes.
	var ver *version.Version
	if len(versionInfo.Major) == 0 {
		return DefaultKubernetesPlaceholderVersion
	}
	ver = version.MustParseSemantic(versionInfo.GitVersion)
	// Append the MINOR version skew.

func ParseIstioVersion(ver string) *IstioVersion {
	// strip the release- prefix if any and extract the version string
	ver = istioVersionRegexp.FindString(strings.TrimPrefix(ver, "release-"))

	if ver == "" {
		// return very large values assuming latest version
		return MaxIstioVersion
	}

	parts := strings.Split(ver, ".")

		return nil
	}
	data = reflect.ValueOf(data).Elem().Interface()
	return data
}

type Status any

// Key function for the configuration objects
func Key(grp, ver, typ, name, namespace string) string {
	return grp + "/" + ver + "/" + typ + "/" + namespace + "/" + name // Format: %s/%s/%s/%s/%s
}

// Key is the unique identifier for a configuration object
func (meta *Meta) Key() string {
	return Key(