Create a copy of the instance and set default values.
        This is so the base class can create a scraper_config with the proper values.

def _create_kubelet_prometheus_instance(self, instance):
        """
        Create a copy of the instance and set default values.
        This is so the base class can create a scraper_config with the proper values.
        """
        kubelet_instance = deepcopy(instance)
        kubelet_instance.update(
            {
                'namespace': self.NAMESPACE,
                # We need to specify a prometheus_url so the base class can use it as the key for our config_map,
                # we specify a dummy url that will be replaced in the `check()` function. We append it with "kubelet"
                # so the key is different than the cadvisor scraper.
                'prometheus_url': instance.get('kubelet_metrics_endpoint', 'dummy_url/kubelet'),
                'metrics': [
                    {
                        'apiserver_client_certificate_expiration_seconds': 'apiserver.certificate.expiration',
                        'rest_client_requests_total': 'rest.client.requests',
                        'rest_client_request_latency_seconds': 'rest.client.latency',
                        'kubelet_runtime_operations': 'kubelet.runtime.operations',
                        'kubelet_runtime_operations_errors': 'kubelet.runtime.errors',
                        'kubelet_network_plugin_operations_latency_microseconds': 'kubelet.network_plugin.latency',
                        'kubelet_volume_stats_available_bytes': 'kubelet.volume.stats.available_bytes',
                        'kubelet_volume_stats_capacity_bytes': 'kubelet.volume.stats.capacity_bytes',
                        'kubelet_volume_stats_used_bytes': 'kubelet.volume.stats.used_bytes',
                        'kubelet_volume_stats_inodes': 'kubelet.volume.stats.inodes',
                        'kubelet_volume_stats_inodes_free': 'kubelet.volume.stats.inodes_free',
                        'kubelet_volume_stats_inodes_used': 'kubelet.volume.stats.inodes_used',
                    }
                ],
                # Defaults that were set when the Kubelet scraper was based on PrometheusScraper
                'send_monotonic_counter': instance.get('send_monotonic_counter', False),
                'health_service_check': instance.get('health_service_check', False),
            }
        )
        return kubelet_instance