func GenerateLocalDNSCoreFile()

in pkg/agent/baker.go [1750:1780]

• 25 lines of code
• 4 McCabe index (conditional complexity)

func GenerateLocalDNSCoreFile(
	config *datamodel.NodeBootstrappingConfiguration,
	profile *datamodel.AgentPoolProfile,
	tmpl string,
) (string, error) {
	parameters := getParameters(config)
	variables := getCustomDataVariables(config)
	bakerFuncMap := getBakerFuncMap(config, parameters, variables)

	if profile.LocalDNSProfile == nil {
		return "", fmt.Errorf("localdns profile is nil")
	}
	if !profile.ShouldEnableLocalDNS() {
		return "", fmt.Errorf("EnableLocalDNS is set to false, corefile will not be generated")
	}

	funcMapForHasSuffix := template.FuncMap{
		"hasSuffix": strings.HasSuffix,
	}
	localDNSCoreFileData := profile.GetLocalDNSCoreFileData()
	localDNSCorefileTemplate := template.Must(template.New("localdnscorefile").Funcs(bakerFuncMap).Funcs(funcMapForHasSuffix).Parse(tmpl))

	// Generate the Corefile content.
	var corefileBuffer bytes.Buffer
	if err := localDNSCorefileTemplate.Execute(&corefileBuffer, localDNSCoreFileData); err != nil {
		return "", fmt.Errorf("failed to execute localdns corefile template: %w", err)
	}

	// Return gzipped base64 encoded Corefile. Used in nodecustomdata.
	return getBase64EncodedGzippedCustomScriptFromStr(corefileBuffer.String()), nil
}