pod_namespace.go

func getPodNamespace() string {
	const namespaceEnvVar = "POD_NAMESPACE"
	const namespaceFile = "/var/run/secrets/kubernetes.io/serviceaccount/namespace"
	namespaceName := os.Getenv(namespaceEnvVar)
	if namespaceName != "" {
		return namespaceName
	}
	namespaceNameBytes, err := os.ReadFile(namespaceFile)
	if err != nil {
		log.Printf("[ERROR] '%s' environment variable not specified and could not read file '%s': '%#v'",
			namespaceEnvVar, namespaceFile, err)
		return ""
	}

	return string(namespaceNameBytes)
}