/
sarama.go
615 lines (513 loc) · 22.5 KB
/
sarama.go
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// Copyright 2017 LinkedIn Corp. Licensed under the Apache License, Version
// 2.0 (the "License"); you may not use this file except in compliance with
// the License. You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
package helpers
import (
"crypto/tls"
"crypto/x509"
"os"
"time"
"go.uber.org/zap"
"go.uber.org/zap/zapcore"
"github.com/Shopify/sarama"
"github.com/spf13/viper"
"github.com/stretchr/testify/mock"
)
// Since 1.X Kafka has moved to semver, so those have a consistent format. For earlier versions we support formats:
// * major.minor.very_minor.patch
// * major.minor.patch
// * major.minor
// However, Sarama does not support anything but the "major.minor.very_minor.patch" flavor of these older versions,
// so we keep these other mappings here as a fallback to not break existing configurations
var legacyKafkaVersionFallback = map[string]sarama.KafkaVersion{
"": sarama.V0_10_2_0,
// Only support back as far as 0.8.2, even if they say 0.8.[0,1], we know they actual mean the last version index
"0.8.0": sarama.V0_8_2_0,
"0.8.1": sarama.V0_8_2_1,
"0.8.2": sarama.V0_8_2_2,
"0.8": sarama.V0_8_2_0,
"0.9.0": sarama.V0_9_0_0,
"0.9": sarama.V0_9_0_0,
"0.10.0": sarama.V0_10_0_0,
"0.10.1": sarama.V0_10_1_0,
"0.10.2": sarama.V0_10_2_0,
"0.10": sarama.V0_10_0_0,
"0.11.0": sarama.V0_11_0_0,
"0.11": sarama.V0_11_0_0,
}
func parseKafkaVersion(kafkaVersion string) sarama.KafkaVersion {
version, err := sarama.ParseKafkaVersion(kafkaVersion)
if err != nil {
// try find the version in the legacy matching
version1, ok := legacyKafkaVersionFallback[kafkaVersion]
if !ok {
panic("Unknown Kafka Version: " + kafkaVersion)
}
version = version1
}
return version
}
// GetSaramaConfigFromClientProfile takes the name of a client-profile configuration entry and returns a sarama.Config
// object that can be used to create a Sarama client with the specified configuration. This includes the Kafka version,
// client ID, TLS, and SASL configs. If there is any error in the configuration, such as a bad TLS certificate file,
// this func will panic as it is normally called when configuring modules.
func GetSaramaConfigFromClientProfile(profileName string) *sarama.Config {
// Set config root and defaults
configRoot := "client-profile." + profileName
if (profileName != "") && (!viper.IsSet("client-profile." + profileName)) {
panic("unknown client-profile '" + profileName + "'")
}
viper.SetDefault(configRoot+".client-id", "burrow-lagchecker")
viper.SetDefault(configRoot+".kafka-version", "2.8.0")
saramaConfig := sarama.NewConfig()
saramaConfig.ClientID = viper.GetString(configRoot + ".client-id")
saramaConfig.Version = parseKafkaVersion(viper.GetString(configRoot + ".kafka-version"))
saramaConfig.Consumer.Return.Errors = true
// Configure TLS if enabled
if viper.IsSet(configRoot + ".tls") {
tlsName := viper.GetString(configRoot + ".tls")
saramaConfig.Net.TLS.Enable = true
certFile := viper.GetString("tls." + tlsName + ".certfile")
keyFile := viper.GetString("tls." + tlsName + ".keyfile")
caFile := viper.GetString("tls." + tlsName + ".cafile")
if caFile == "" {
saramaConfig.Net.TLS.Config = &tls.Config{}
} else {
caCert, err := os.ReadFile(caFile)
if err != nil {
panic("cannot read TLS CA file: " + err.Error())
}
caCertPool := x509.NewCertPool()
caCertPool.AppendCertsFromPEM(caCert)
saramaConfig.Net.TLS.Config = &tls.Config{
RootCAs: caCertPool,
}
if certFile != "" && keyFile != "" {
cert, err := tls.LoadX509KeyPair(certFile, keyFile)
if err != nil {
panic("cannot read TLS certificate or key file: " + err.Error())
}
saramaConfig.Net.TLS.Config.Certificates = []tls.Certificate{cert}
}
}
saramaConfig.Net.TLS.Config.InsecureSkipVerify = viper.GetBool("tls." + tlsName + ".noverify")
}
// Configure SASL if enabled
if viper.IsSet(configRoot + ".sasl") {
saslName := viper.GetString(configRoot + ".sasl")
saramaConfig.Net.SASL.Enable = true
mechanism := viper.GetString("sasl." + saslName + ".mechanism")
if mechanism == "SCRAM-SHA-256" {
saramaConfig.Net.SASL.Mechanism = sarama.SASLTypeSCRAMSHA256
saramaConfig.Net.SASL.SCRAMClientGeneratorFunc = func() sarama.SCRAMClient {
return &XDGSCRAMClient{HashGeneratorFcn: SHA256}
}
} else if mechanism == "SCRAM-SHA-512" {
saramaConfig.Net.SASL.Mechanism = sarama.SASLTypeSCRAMSHA512
saramaConfig.Net.SASL.SCRAMClientGeneratorFunc = func() sarama.SCRAMClient {
return &XDGSCRAMClient{HashGeneratorFcn: SHA512}
}
}
saramaConfig.Net.SASL.Handshake = viper.GetBool("sasl." + saslName + ".handshake-first")
saramaConfig.Net.SASL.User = viper.GetString("sasl." + saslName + ".username")
saramaConfig.Net.SASL.Password = viper.GetString("sasl." + saslName + ".password")
}
// Timeout for the initial connection
if viper.IsSet(configRoot + ".dial-timeout") {
saramaConfig.Net.DialTimeout = time.Duration(viper.GetInt(configRoot+".dial-timeout")) * time.Second
}
// Timeout for a request's response
if viper.IsSet(configRoot + ".read-timeout") {
saramaConfig.Net.ReadTimeout = time.Duration(viper.GetInt(configRoot+".read-timeout")) * time.Second
}
return saramaConfig
}
// SaramaClient is an internal interface to the sarama.Client. We use our own interface because while sarama.Client is
// an interface, sarama.Broker is not. This makes it difficult to test code which uses the Broker objects. This
// interface operates in the same way, with the addition of an interface function for creating consumers on the client.
type SaramaClient interface {
// Config returns the Config struct of the client. This struct should not be altered after it has been created.
Config() *sarama.Config
// Brokers returns the current set of active brokers as retrieved from cluster metadata.
Brokers() []SaramaBroker
// Topics returns the set of available topics as retrieved from cluster metadata.
Topics() ([]string, error)
// Partitions returns the sorted list of all partition IDs for the given topic.
Partitions(topic string) ([]int32, error)
// WritablePartitions returns the sorted list of all writable partition IDs for the given topic, where "writable"
// means "having a valid leader accepting writes".
WritablePartitions(topic string) ([]int32, error)
// Leader returns the broker object that is the leader of the current topic/partition, as determined by querying the
// cluster metadata.
Leader(topic string, partitionID int32) (SaramaBroker, error)
// Replicas returns the set of all replica IDs for the given partition.
Replicas(topic string, partitionID int32) ([]int32, error)
// InSyncReplicas returns the set of all in-sync replica IDs for the given partition. In-sync replicas are replicas
// which are fully caught up with the partition leader.
InSyncReplicas(topic string, partitionID int32) ([]int32, error)
// RefreshMetadata takes a list of topics and queries the cluster to refresh the available metadata for those topics.
// If no topics are provided, it will refresh metadata for all topics.
RefreshMetadata(topics ...string) error
// GetOffset queries the cluster to get the most recent available offset at the given time (in milliseconds) on the
// topic/partition combination. Time should be OffsetOldest for the earliest available offset, OffsetNewest for the
// offset of the message that will be produced next, or a time.
GetOffset(topic string, partitionID int32, timestamp int64) (int64, error)
// Coordinator returns the coordinating broker for a consumer group. It will return a locally cached value if it's
// available. You can call RefreshCoordinator to update the cached value. This function only works on Kafka 0.8.2 and
// higher.
Coordinator(consumerGroup string) (SaramaBroker, error)
// RefreshCoordinator retrieves the coordinator for a consumer group and stores it in local cache. This function only
// works on Kafka 0.8.2 and higher.
RefreshCoordinator(consumerGroup string) error
// Close shuts down all broker connections managed by this client. It is required to call this function before a client
// object passes out of scope, as it will otherwise leak memory. You must close any Producers or Consumers using a
// client before you close the client.
Close() error
// Closed returns true if the client has already had Close called on it
Closed() bool
// NewConsumerFromClient creates a new consumer using the given client. It is still necessary to call Close() on the
// underlying client when shutting down this consumer.
NewConsumerFromClient() (sarama.Consumer, error)
// List the consumer groups available in the cluster.
// Returns a Map with the consumer group and consumer group type, this is
// used in the code as a Set, the consumer group type is not relevant, we
// decided to not convert it to a map[string]struct returned by Sarama
ListConsumerGroups() (map[string]string, error)
}
// BurrowSaramaClient is an implementation of the SaramaClient interface for use in Burrow modules
type BurrowSaramaClient struct {
Client sarama.Client
}
// Config returns the Config struct of the client. This struct should not be altered after it has been created.
func (c *BurrowSaramaClient) Config() *sarama.Config {
return c.Client.Config()
}
// Brokers returns the current set of active brokers as retrieved from cluster metadata.
func (c *BurrowSaramaClient) Brokers() []SaramaBroker {
brokers := c.Client.Brokers()
shimBrokers := make([]SaramaBroker, len(brokers))
for i, broker := range brokers {
shimBrokers[i] = &BurrowSaramaBroker{broker}
}
return shimBrokers
}
// Topics returns the set of available topics as retrieved from cluster metadata.
func (c *BurrowSaramaClient) Topics() ([]string, error) {
return c.Client.Topics()
}
// Partitions returns the sorted list of all partition IDs for the given topic.
func (c *BurrowSaramaClient) Partitions(topic string) ([]int32, error) {
return c.Client.Partitions(topic)
}
// WritablePartitions returns the sorted list of all writable partition IDs for the given topic, where "writable"
// means "having a valid leader accepting writes".
func (c *BurrowSaramaClient) WritablePartitions(topic string) ([]int32, error) {
return c.Client.WritablePartitions(topic)
}
// Leader returns the broker object that is the leader of the current topic/partition, as determined by querying the
// cluster metadata.
func (c *BurrowSaramaClient) Leader(topic string, partitionID int32) (SaramaBroker, error) {
broker, err := c.Client.Leader(topic, partitionID)
var shimBroker *BurrowSaramaBroker
if broker != nil {
shimBroker = &BurrowSaramaBroker{broker}
}
return shimBroker, err
}
// Replicas returns the set of all replica IDs for the given partition.
func (c *BurrowSaramaClient) Replicas(topic string, partitionID int32) ([]int32, error) {
return c.Client.Replicas(topic, partitionID)
}
// InSyncReplicas returns the set of all in-sync replica IDs for the given partition. In-sync replicas are replicas
// which are fully caught up with the partition leader.
func (c *BurrowSaramaClient) InSyncReplicas(topic string, partitionID int32) ([]int32, error) {
return c.Client.InSyncReplicas(topic, partitionID)
}
// RefreshMetadata takes a list of topics and queries the cluster to refresh the available metadata for those topics.
// If no topics are provided, it will refresh metadata for all topics.
func (c *BurrowSaramaClient) RefreshMetadata(topics ...string) error {
return c.Client.RefreshMetadata(topics...)
}
// GetOffset queries the cluster to get the most recent available offset at the given time (in milliseconds) on the
// topic/partition combination. Time should be OffsetOldest for the earliest available offset, OffsetNewest for the
// offset of the message that will be produced next, or a time.
func (c *BurrowSaramaClient) GetOffset(topic string, partitionID int32, timestamp int64) (int64, error) {
return c.Client.GetOffset(topic, partitionID, timestamp)
}
// Coordinator returns the coordinating broker for a consumer group. It will return a locally cached value if it's
// available. You can call RefreshCoordinator to update the cached value. This function only works on Kafka 0.8.2 and
// higher.
func (c *BurrowSaramaClient) Coordinator(consumerGroup string) (SaramaBroker, error) {
broker, err := c.Client.Coordinator(consumerGroup)
var shimBroker *BurrowSaramaBroker
if broker != nil {
shimBroker = &BurrowSaramaBroker{broker}
}
return shimBroker, err
}
// RefreshCoordinator retrieves the coordinator for a consumer group and stores it in local cache. This function only
// works on Kafka 0.8.2 and higher.
func (c *BurrowSaramaClient) RefreshCoordinator(consumerGroup string) error {
return c.Client.RefreshCoordinator(consumerGroup)
}
// Close shuts down all broker connections managed by this client. It is required to call this function before a client
// object passes out of scope, as it will otherwise leak memory. You must close any Producers or Consumers using a
// client before you close the client.
func (c *BurrowSaramaClient) Close() error {
return c.Client.Close()
}
// Closed returns true if the client has already had Close called on it
func (c *BurrowSaramaClient) Closed() bool {
return c.Client.Closed()
}
// NewConsumerFromClient creates a new consumer using the given client. It is still necessary to call Close() on the
// underlying client when shutting down this consumer.
func (c *BurrowSaramaClient) NewConsumerFromClient() (sarama.Consumer, error) {
return sarama.NewConsumerFromClient(c.Client)
}
// SaramaBroker is an internal interface on the sarama.Broker struct. It is used with the SaramaClient interface in
// order to provide a fully testable interface for the pieces of Sarama that are used inside Burrow. Currently, this
// interface only defines the methods that Burrow is using. It should not be considered a complete interface for
// sarama.Broker
type SaramaBroker interface {
// ID returns the broker ID retrieved from Kafka's metadata, or -1 if that is not known.
ID() int32
// Close closes the connection associated with the broker
Close() error
// GetAvailableOffsets sends an OffsetRequest to the broker and returns the OffsetResponse that was received
GetAvailableOffsets(*sarama.OffsetRequest) (*sarama.OffsetResponse, error)
}
// BurrowSaramaBroker is an implementation of the SaramaBroker interface that is used with SaramaClient
type BurrowSaramaBroker struct {
broker *sarama.Broker
}
// ID returns the broker ID retrieved from Kafka's metadata, or -1 if that is not known.
func (b *BurrowSaramaBroker) ID() int32 {
return b.broker.ID()
}
// Close closes the connection associated with the broker
func (b *BurrowSaramaBroker) Close() error {
return b.broker.Close()
}
// GetAvailableOffsets sends an OffsetRequest to the broker and returns the OffsetResponse that was received
func (b *BurrowSaramaBroker) GetAvailableOffsets(request *sarama.OffsetRequest) (*sarama.OffsetResponse, error) {
return b.broker.GetAvailableOffsets(request)
}
// ListConsumerGroups List the consumer groups available in the cluster.
func (c *BurrowSaramaClient) ListConsumerGroups() (map[string]string, error) {
admin, err := sarama.NewClusterAdminFromClient(c.Client)
if err != nil {
return nil, err
}
return admin.ListConsumerGroups()
}
// MockSaramaClient is a mock of SaramaClient. It is used in tests by multiple packages. It should never be used in the
// normal code.
type MockSaramaClient struct {
mock.Mock
}
// Config mocks SaramaClient.Config
func (m *MockSaramaClient) Config() *sarama.Config {
args := m.Called()
return args.Get(0).(*sarama.Config)
}
// Brokers mocks SaramaClient.Brokers
func (m *MockSaramaClient) Brokers() []SaramaBroker {
args := m.Called()
return args.Get(0).([]SaramaBroker)
}
// Topics mocks SaramaClient.Topics
func (m *MockSaramaClient) Topics() ([]string, error) {
args := m.Called()
return args.Get(0).([]string), args.Error(1)
}
// Partitions mocks SaramaClient.Partitions
func (m *MockSaramaClient) Partitions(topic string) ([]int32, error) {
args := m.Called(topic)
return args.Get(0).([]int32), args.Error(1)
}
// WritablePartitions mocks SaramaClient.WritablePartitions
func (m *MockSaramaClient) WritablePartitions(topic string) ([]int32, error) {
args := m.Called(topic)
return args.Get(0).([]int32), args.Error(1)
}
// Leader mocks SaramaClient.Leader
func (m *MockSaramaClient) Leader(topic string, partitionID int32) (SaramaBroker, error) {
args := m.Called(topic, partitionID)
return args.Get(0).(SaramaBroker), args.Error(1)
}
// Replicas mocks SaramaClient.Replicas
func (m *MockSaramaClient) Replicas(topic string, partitionID int32) ([]int32, error) {
args := m.Called(topic, partitionID)
return args.Get(0).([]int32), args.Error(1)
}
// InSyncReplicas mocks SaramaClient.InSyncReplicas
func (m *MockSaramaClient) InSyncReplicas(topic string, partitionID int32) ([]int32, error) {
args := m.Called(topic, partitionID)
return args.Get(0).([]int32), args.Error(1)
}
// RefreshMetadata mocks SaramaClient.RefreshMetadata
func (m *MockSaramaClient) RefreshMetadata(topics ...string) error {
if len(topics) > 0 {
args := m.Called([]interface{}{topics}...)
return args.Error(0)
}
args := m.Called()
return args.Error(0)
}
// GetOffset mocks SaramaClient.GetOffset
func (m *MockSaramaClient) GetOffset(topic string, partitionID int32, timestamp int64) (int64, error) {
args := m.Called(topic, partitionID, timestamp)
return args.Get(0).(int64), args.Error(1)
}
// Coordinator mocks SaramaClient.Coordinator
func (m *MockSaramaClient) Coordinator(consumerGroup string) (SaramaBroker, error) {
args := m.Called(consumerGroup)
return args.Get(0).(SaramaBroker), args.Error(1)
}
// RefreshCoordinator mocks SaramaClient.RefreshCoordinator
func (m *MockSaramaClient) RefreshCoordinator(consumerGroup string) error {
args := m.Called(consumerGroup)
return args.Error(0)
}
// Close mocks SaramaClient.Close
func (m *MockSaramaClient) Close() error {
args := m.Called()
return args.Error(0)
}
// Closed mocks SaramaClient.Closed
func (m *MockSaramaClient) Closed() bool {
args := m.Called()
return args.Bool(0)
}
// NewConsumerFromClient mocks SaramaClient.NewConsumerFromClient
func (m *MockSaramaClient) NewConsumerFromClient() (sarama.Consumer, error) {
args := m.Called()
return args.Get(0).(sarama.Consumer), args.Error(1)
}
func (m *MockSaramaClient) ListConsumerGroups() (map[string]string, error) {
args := m.Called()
return args.Get(0).(map[string]string), args.Error(1)
}
// MockSaramaBroker is a mock of SaramaBroker. It is used in tests by multiple packages. It should never be used in the
// normal code.
type MockSaramaBroker struct {
mock.Mock
}
// ID mocks SaramaBroker.ID
func (m *MockSaramaBroker) ID() int32 {
args := m.Called()
return args.Get(0).(int32)
}
// Close mocks SaramaBroker.Close
func (m *MockSaramaBroker) Close() error {
args := m.Called()
return args.Error(0)
}
// GetAvailableOffsets mocks SaramaBroker.GetAvailableOffsets
func (m *MockSaramaBroker) GetAvailableOffsets(request *sarama.OffsetRequest) (*sarama.OffsetResponse, error) {
args := m.Called(request)
return args.Get(0).(*sarama.OffsetResponse), args.Error(1)
}
// MockSaramaConsumer is a mock of sarama.Consumer. It is used in tests by multiple packages. It should never be used
// in the normal code.
type MockSaramaConsumer struct {
mock.Mock
}
// Topics mocks sarama.Consumer.Topics
func (m *MockSaramaConsumer) Topics() ([]string, error) {
args := m.Called()
return args.Get(0).([]string), args.Error(1)
}
// Partitions mocks sarama.Consumer.Partitions
func (m *MockSaramaConsumer) Partitions(topic string) ([]int32, error) {
args := m.Called(topic)
return args.Get(0).([]int32), args.Error(1)
}
// ConsumePartition mocks sarama.Consumer.ConsumePartition
func (m *MockSaramaConsumer) ConsumePartition(topic string, partition int32, offset int64) (sarama.PartitionConsumer, error) {
args := m.Called(topic, partition, offset)
return args.Get(0).(sarama.PartitionConsumer), args.Error(1)
}
// HighWaterMarks mocks sarama.Consumer.HighWaterMarks
func (m *MockSaramaConsumer) HighWaterMarks() map[string]map[int32]int64 {
args := m.Called()
return args.Get(0).(map[string]map[int32]int64)
}
// Close mocks sarama.Consumer.Close
func (m *MockSaramaConsumer) Close() error {
args := m.Called()
return args.Error(0)
}
// Pause mocks sarama.Consumer.Pause
func (m *MockSaramaConsumer) Pause(topicPartitions map[string][]int32) {
m.Called()
}
// Resume mocks sarama.Consumer.Resume
func (m *MockSaramaConsumer) Resume(topicPartitions map[string][]int32) {
m.Called()
}
// PauseAll mocks sarama.Consumer.PauseAll
func (m *MockSaramaConsumer) PauseAll() {
m.Called()
}
// ResumeAll mocks sarama.Consumer.ResumeAll
func (m *MockSaramaConsumer) ResumeAll() {
m.Called()
}
// MockSaramaPartitionConsumer is a mock of sarama.PartitionConsumer. It is used in tests by multiple packages. It
// should never be used in the normal code.
type MockSaramaPartitionConsumer struct {
mock.Mock
}
// AsyncClose mocks sarama.PartitionConsumer.AsyncClose
func (m *MockSaramaPartitionConsumer) AsyncClose() {
m.Called()
}
// Close mocks sarama.PartitionConsumer.Close
func (m *MockSaramaPartitionConsumer) Close() error {
args := m.Called()
return args.Error(0)
}
// Messages mocks sarama.PartitionConsumer.Messages
func (m *MockSaramaPartitionConsumer) Messages() <-chan *sarama.ConsumerMessage {
args := m.Called()
return args.Get(0).(<-chan *sarama.ConsumerMessage)
}
// Errors mocks sarama.PartitionConsumer.Errors
func (m *MockSaramaPartitionConsumer) Errors() <-chan *sarama.ConsumerError {
args := m.Called()
return args.Get(0).(<-chan *sarama.ConsumerError)
}
// HighWaterMarkOffset mocks sarama.PartitionConsumer.HighWaterMarkOffset
func (m *MockSaramaPartitionConsumer) HighWaterMarkOffset() int64 {
args := m.Called()
return args.Get(0).(int64)
}
// IsPaused mocks sarama.PartitionConsumer.IsPaused
func (m *MockSaramaPartitionConsumer) IsPaused() bool {
args := m.Called()
return args.Get(0).(bool)
}
// Pause mocks sarama.PartitionConsumer.Pause
func (m *MockSaramaPartitionConsumer) Pause() {
m.Called()
}
// Resume mocks sarama.PartitionConsumer.Resume
func (m *MockSaramaPartitionConsumer) Resume() {
m.Called()
}
func newSaramaZapLogger(logger *zap.Logger) sarama.StdLogger {
sl, _ := zap.NewStdLogAt(logger.With(zap.String("name", "sarama")), zapcore.DebugLevel)
return sl
}
// InitSaramaLogging assigns a new logger to sarama.Logger, which
// will send messages to given zap logger at debug level
func InitSaramaLogging(logger *zap.Logger) {
sarama.Logger = newSaramaZapLogger(logger)
}