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# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
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#
#    http://www.apache.org/licenses/LICENSE-2.0
#
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from ducktape.tests.test import Test
from ducktape.mark import matrix, parametrize
from ducktape.mark.resource import cluster

from kafkatest.services.zookeeper import ZookeeperService
from kafkatest.services.kafka import KafkaService
from kafkatest.services.performance import ProducerPerformanceService
from kafkatest.services.console_consumer import ConsoleConsumer
from kafkatest.version import DEV_BRANCH, V_1_1_0

class QuotaConfig(object):
    CLIENT_ID = 'client-id'
    USER = 'user'
    USER_CLIENT = '(user, client-id)'

    LARGE_QUOTA = 1000 * 1000 * 1000
    USER_PRINCIPAL = 'CN=systemtest'

    def __init__(self, quota_type, override_quota, kafka):
        if quota_type == QuotaConfig.CLIENT_ID:
            if override_quota:
                self.client_id = 'overridden_id'
                self.producer_quota = 3750000
                self.consumer_quota = 3000000
                self.configure_quota(kafka, self.producer_quota, self.consumer_quota, ['clients', self.client_id])
                self.configure_quota(kafka, QuotaConfig.LARGE_QUOTA, QuotaConfig.LARGE_QUOTA, ['clients', None])
            else:
                self.client_id = 'default_id'
                self.producer_quota = 2500000
                self.consumer_quota = 2000000
                self.configure_quota(kafka, self.producer_quota, self.consumer_quota, ['clients', None])
                self.configure_quota(kafka, QuotaConfig.LARGE_QUOTA, QuotaConfig.LARGE_QUOTA, ['clients', 'overridden_id'])
        elif quota_type == QuotaConfig.USER:
            if override_quota:
                self.client_id = 'some_id'
                self.producer_quota = 3750000
                self.consumer_quota = 3000000
                self.configure_quota(kafka, self.producer_quota, self.consumer_quota, ['users', QuotaConfig.USER_PRINCIPAL])
                self.configure_quota(kafka, QuotaConfig.LARGE_QUOTA, QuotaConfig.LARGE_QUOTA, ['users', None])
                self.configure_quota(kafka, QuotaConfig.LARGE_QUOTA, QuotaConfig.LARGE_QUOTA, ['clients', self.client_id])
            else:
                self.client_id = 'some_id'
                self.producer_quota = 2500000
                self.consumer_quota = 2000000
                self.configure_quota(kafka, self.producer_quota, self.consumer_quota, ['users', None])
                self.configure_quota(kafka, QuotaConfig.LARGE_QUOTA, QuotaConfig.LARGE_QUOTA, ['clients', None])
        elif quota_type == QuotaConfig.USER_CLIENT:
            if override_quota:
                self.client_id = 'overridden_id'
                self.producer_quota = 3750000
                self.consumer_quota = 3000000
                self.configure_quota(kafka, self.producer_quota, self.consumer_quota, ['users', QuotaConfig.USER_PRINCIPAL, 'clients', self.client_id])
                self.configure_quota(kafka, QuotaConfig.LARGE_QUOTA, QuotaConfig.LARGE_QUOTA, ['users', QuotaConfig.USER_PRINCIPAL, 'clients', None])
                self.configure_quota(kafka, QuotaConfig.LARGE_QUOTA, QuotaConfig.LARGE_QUOTA, ['users', None])
                self.configure_quota(kafka, QuotaConfig.LARGE_QUOTA, QuotaConfig.LARGE_QUOTA, ['clients', self.client_id])
            else:
                self.client_id = 'default_id'
                self.producer_quota = 2500000
                self.consumer_quota = 2000000
                self.configure_quota(kafka, self.producer_quota, self.consumer_quota, ['users', None, 'clients', None])
                self.configure_quota(kafka, QuotaConfig.LARGE_QUOTA, QuotaConfig.LARGE_QUOTA, ['users', None])
                self.configure_quota(kafka, QuotaConfig.LARGE_QUOTA, QuotaConfig.LARGE_QUOTA, ['clients', None])

    def configure_quota(self, kafka, producer_byte_rate, consumer_byte_rate, entity_args):
        node = kafka.nodes[0]
        cmd = "%s --zookeeper %s --alter --add-config producer_byte_rate=%d,consumer_byte_rate=%d" % \
              (kafka.path.script("kafka-configs.sh", node), kafka.zk_connect_setting(), producer_byte_rate, consumer_byte_rate)
        cmd += " --entity-type " + entity_args[0] + self.entity_name_opt(entity_args[1])
        if len(entity_args) > 2:
            cmd += " --entity-type " + entity_args[2] + self.entity_name_opt(entity_args[3])
        node.account.ssh(cmd)

    def entity_name_opt(self, name):
        return " --entity-default" if name is None else " --entity-name " + name

class QuotaTest(Test):
    """
    These tests verify that quota provides expected functionality -- they run
    producer, broker, and consumer with different clientId and quota configuration and
    check that the observed throughput is close to the value we expect.
    """

    def __init__(self, test_context):
        """:type test_context: ducktape.tests.test.TestContext"""
        super(QuotaTest, self).__init__(test_context=test_context)

        self.topic = 'test_topic'
        self.logger.info('use topic ' + self.topic)

        self.maximum_client_deviation_percentage = 100.0
        self.maximum_broker_deviation_percentage = 5.0
        self.num_records = 50000
        self.record_size = 3000

        self.zk = ZookeeperService(test_context, num_nodes=1)
        self.kafka = KafkaService(test_context, num_nodes=1, zk=self.zk,
                                  security_protocol='SSL', authorizer_class_name='',
                                  interbroker_security_protocol='SSL',
                                  topics={self.topic: {'partitions': 6, 'replication-factor': 1, 'configs': {'min.insync.replicas': 1}}},
                                  jmx_object_names=['kafka.server:type=BrokerTopicMetrics,name=BytesInPerSec',
                                                    'kafka.server:type=BrokerTopicMetrics,name=BytesOutPerSec'],
                                  jmx_attributes=['OneMinuteRate'])
        self.num_producers = 1
        self.num_consumers = 2

    def setUp(self):
        self.zk.start()

    def min_cluster_size(self):
        """Override this since we're adding services outside of the constructor"""
        return super(QuotaTest, self).min_cluster_size() + self.num_producers + self.num_consumers

    @cluster(num_nodes=5)
    @matrix(quota_type=[QuotaConfig.CLIENT_ID, QuotaConfig.USER, QuotaConfig.USER_CLIENT], override_quota=[True, False])
    @parametrize(quota_type=QuotaConfig.CLIENT_ID, consumer_num=2)
    @parametrize(quota_type=QuotaConfig.CLIENT_ID, old_broker_throttling_behavior=True)
    @parametrize(quota_type=QuotaConfig.CLIENT_ID, old_client_throttling_behavior=True)
    def test_quota(self, quota_type, override_quota=True, producer_num=1, consumer_num=1,
                   old_broker_throttling_behavior=False, old_client_throttling_behavior=False):
        # Old (pre-2.0) throttling behavior for broker throttles before sending a response to the client.
        if old_broker_throttling_behavior:
            self.kafka.set_version(V_1_1_0)
        self.kafka.start()

        self.quota_config = QuotaConfig(quota_type, override_quota, self.kafka)
        producer_client_id = self.quota_config.client_id
        consumer_client_id = self.quota_config.client_id

        # Old (pre-2.0) throttling behavior for client does not throttle upon receiving a response with a non-zero throttle time.
        if old_client_throttling_behavior:
            client_version = V_1_1_0
        else:
            client_version = DEV_BRANCH

        # Produce all messages
        producer = ProducerPerformanceService(
            self.test_context, producer_num, self.kafka,
            topic=self.topic, num_records=self.num_records, record_size=self.record_size, throughput=-1,
            client_id=producer_client_id, version=client_version)

        producer.run()

        # Consume all messages
        consumer = ConsoleConsumer(self.test_context, consumer_num, self.kafka, self.topic,
            consumer_timeout_ms=60000, client_id=consumer_client_id,
            jmx_object_names=['kafka.consumer:type=consumer-fetch-manager-metrics,client-id=%s' % consumer_client_id],
            jmx_attributes=['bytes-consumed-rate'], version=client_version)
        consumer.run()

        for idx, messages in consumer.messages_consumed.iteritems():
            assert len(messages) > 0, "consumer %d didn't consume any message before timeout" % idx

        success, msg = self.validate(self.kafka, producer, consumer)
        assert success, msg

    def validate(self, broker, producer, consumer):
        """
        For each client_id we validate that:
        1) number of consumed messages equals number of produced messages
        2) maximum_producer_throughput <= producer_quota * (1 + maximum_client_deviation_percentage/100)
        3) maximum_broker_byte_in_rate <= producer_quota * (1 + maximum_broker_deviation_percentage/100)
        4) maximum_consumer_throughput <= consumer_quota * (1 + maximum_client_deviation_percentage/100)
        5) maximum_broker_byte_out_rate <= consumer_quota * (1 + maximum_broker_deviation_percentage/100)
        """
        success = True
        msg = ''

        self.kafka.read_jmx_output_all_nodes()

        # validate that number of consumed messages equals number of produced messages
        produced_num = sum([value['records'] for value in producer.results])
        consumed_num = sum([len(value) for value in consumer.messages_consumed.values()])
        self.logger.info('producer produced %d messages' % produced_num)
        self.logger.info('consumer consumed %d messages' % consumed_num)
        if produced_num != consumed_num:
            success = False
            msg += "number of produced messages %d doesn't equal number of consumed messages %d" % (produced_num, consumed_num)

        # validate that maximum_producer_throughput <= producer_quota * (1 + maximum_client_deviation_percentage/100)
        producer_maximum_bps = max(
            metric.value for k, metrics in producer.metrics(group='producer-metrics', name='outgoing-byte-rate', client_id=producer.client_id) for metric in metrics
        )
        producer_quota_bps = self.quota_config.producer_quota
        self.logger.info('producer has maximum throughput %.2f bps with producer quota %.2f bps' % (producer_maximum_bps, producer_quota_bps))
        if producer_maximum_bps > producer_quota_bps*(self.maximum_client_deviation_percentage/100+1):
            success = False
            msg += 'maximum producer throughput %.2f bps exceeded producer quota %.2f bps by more than %.1f%%' % \
                   (producer_maximum_bps, producer_quota_bps, self.maximum_client_deviation_percentage)

        # validate that maximum_broker_byte_in_rate <= producer_quota * (1 + maximum_broker_deviation_percentage/100)
        broker_byte_in_attribute_name = 'kafka.server:type=BrokerTopicMetrics,name=BytesInPerSec:OneMinuteRate'
        broker_maximum_byte_in_bps = broker.maximum_jmx_value[broker_byte_in_attribute_name]
        self.logger.info('broker has maximum byte-in rate %.2f bps with producer quota %.2f bps' %
                         (broker_maximum_byte_in_bps, producer_quota_bps))
        if broker_maximum_byte_in_bps > producer_quota_bps*(self.maximum_broker_deviation_percentage/100+1):
            success = False
            msg += 'maximum broker byte-in rate %.2f bps exceeded producer quota %.2f bps by more than %.1f%%' % \
                   (broker_maximum_byte_in_bps, producer_quota_bps, self.maximum_broker_deviation_percentage)

        # validate that maximum_consumer_throughput <= consumer_quota * (1 + maximum_client_deviation_percentage/100)
        consumer_attribute_name = 'kafka.consumer:type=consumer-fetch-manager-metrics,client-id=%s:bytes-consumed-rate' % consumer.client_id
        consumer_maximum_bps = consumer.maximum_jmx_value[consumer_attribute_name]
        consumer_quota_bps = self.quota_config.consumer_quota
        self.logger.info('consumer has maximum throughput %.2f bps with consumer quota %.2f bps' % (consumer_maximum_bps, consumer_quota_bps))
        if consumer_maximum_bps > consumer_quota_bps*(self.maximum_client_deviation_percentage/100+1):
            success = False
            msg += 'maximum consumer throughput %.2f bps exceeded consumer quota %.2f bps by more than %.1f%%' % \
                   (consumer_maximum_bps, consumer_quota_bps, self.maximum_client_deviation_percentage)

        # validate that maximum_broker_byte_out_rate <= consumer_quota * (1 + maximum_broker_deviation_percentage/100)
        broker_byte_out_attribute_name = 'kafka.server:type=BrokerTopicMetrics,name=BytesOutPerSec:OneMinuteRate'
        broker_maximum_byte_out_bps = broker.maximum_jmx_value[broker_byte_out_attribute_name]
        self.logger.info('broker has maximum byte-out rate %.2f bps with consumer quota %.2f bps' %
                         (broker_maximum_byte_out_bps, consumer_quota_bps))
        if broker_maximum_byte_out_bps > consumer_quota_bps*(self.maximum_broker_deviation_percentage/100+1):
            success = False
            msg += 'maximum broker byte-out rate %.2f bps exceeded consumer quota %.2f bps by more than %.1f%%' % \
                   (broker_maximum_byte_out_bps, consumer_quota_bps, self.maximum_broker_deviation_percentage)

        return success, msg

