Kinesis Mock

• Kinesis Mock
• Overview
• Starting the service
• Service Configuration
• Usage
  • Configuring AWS SDK Kinesis Client
  • Configuring the KPL
  • Configuring the KCL
• Known issues

Overview

A mock for the Kinesis API, intended for local testing.

Starting the service

There are a few ways to start kinesis-mock.

Docker

It is available as a docker image in the GitHub Container Registry:

1docker pull ghcr.io/etspaceman/kinesis-mock:0.4.1
2docker run -p 4567:4567 -p 4568:4568 ghcr.io/etspaceman/kinesis-mock:0.4.1

NPM

It is available on NPM as an executable service.

1npm i kinesis-local
2npx kinesis-local

Manual

You can also leverage the following executable options in the release assets:

File	Description	Launching
main.js	Executable NodeJS file that can be run in any NodeJS enabled environment	node ./main.js
main.js.map	Source mappings for main.js
server.json	self-signed certificate for TLS. Should be included in the same area as main.js

Service Configuration

Below is the available configuration for the service. Note that it is not recommended to edit the ports in the docker environment (rather you can map these ports to a local one).

Variable	Data Type	Default Value	Notes
INITIALIZE_STREAMS	String		A comma-delimited string of stream names, its optional corresponding shard count and an optional region to initialize during startup. If the shard count is not provided, the default shard count of 4 is used. If the region is not provided, the default region is used. For example: "my-first-stream:1,my-other-stream::us-west-2,my-last-stream:1"
KINESIS_MOCK_TLS_PORT	Int	4567	Https Only
KINESIS_MOCK_PLAIN_PORT	Int	4568	Http Only
KINESIS_MOCK_KEYSTORE_PASSWORD	Int		Password for the JKS KeyStore (only for JVM, not JS)
KINESIS_MOCK_KEYMANAGER_PASSWORD	Int		Password for the JKS KeyManager (only for JVM, not JS)
KINESIS_MOCK_CERT_PASSWORD	Int		Password used for self-signed certificate (only for JS, not JVM)
KINESIS_MOCK_CERT_PATH	Int	server.json	Path to certificate file (only for JS, not JVM)
CREATE_STREAM_DURATION	Duration	500ms
DELETE_STREAM_DURATION	Duration	500ms
REGISTER_STREAM_CONSUMER_DURATION	Duration	500ms
START_STREAM_ENCRYPTION_DURATION	Duration	500ms
STOP_STREAM_ENCRYPTION_DURATION	Duration	500ms
DEREGISTER_STREAM_CONSUMER_DURATION	Duration	500ms
MERGE_SHARDS_DURATION	Duration	500ms
SPLIT_SHARD_DURATION	Duration	500ms
UPDATE_SHARD_COUNT_DURATION	Duration	500ms
UPDATE_STREAM_MODE_DURATION	Duration	500ms
SHARD_LIMIT	Int	50
ON_DEMAND_STREAM_COUNT_LIMIT	Int	10
AWS_ACCOUNT_ID	String	"000000000000"
AWS_REGION	String	"us-east-1"	Default region in use for operations. E.g. if a region is not provided by the INITIALIZE_STREAMS values.
LOG_LEVEL	String	"INFO"	Sets the log-level for kinesis-mock specific logs
ROOT_LOG_LEVEL	String	"ERROR"	Sets the log-level for all dependencies
LOAD_DATA_IF_EXISTS	Boolean	true	Loads data from the configured persisted data file if it exists
SHOULD_PERSIST_DATA	Boolean	false	Persists data to disk. Used to keep data during restarts of the service
PERSIST_PATH	String	"data"	Path to persist data to. If it doesn't start with "/", the path is considered relative to the present working directory.
PERSIST_FILE_NAME	String	"kinesis-data.json"	File name for persisted data
PERSIST_INTERVAL	Duration	5s	Delay between data persistence

Log Levels

You can configure the LOG_LEVEL of the mock with the following levels in mind:

• ERROR- Unhandled errors in the service
• WARN - Handled errors in the service (e.g. bad requests)
• INFO - High-level, low-noise informational messages (default)
• DEBUG - Low-level, high-noise informational messages
• TRACE - Log data bodies going in / out of the service

Usage

The image exposes 2 ports for interactions:

• 4567 (https)
• 4568 (http)

For an example docker-compose setup which uses this image, check out the docker-compose.yml file.

There are examples configuring the KPL, KCL and AWS SDK to use this mock in the integration tests.

Configuring AWS SDK Kinesis Client

1import software.amazon.awssdk.auth.credentials.{AwsCredentials,AwsCredentialsProvider}
2import software.amazon.awssdk.http.SdkHttpConfigurationOption
3import software.amazon.awssdk.http.async.SdkAsyncHttpClient
4import software.amazon.awssdk.http.nio.netty.NettyNioAsyncHttpClient
5import software.amazon.awssdk.regions.Region
6import software.amazon.awssdk.services.kinesis.KinesisAsyncClient
7import software.amazon.awssdk.services.kinesis.model._
8import software.amazon.awssdk.utils.AttributeMap
9
10object MyApp {
11  // A mock credentials provider
12  final case class AwsCreds(accessKey: String, secretKey: String)
13    extends AwsCredentials
14    with AwsCredentialsProvider {
15    override def accessKeyId(): String = accessKey
16    override def secretAccessKey(): String = secretKey
17    override def resolveCredentials(): AwsCredentials = this
18  }
19
20  object AwsCreds {
21    val LocalCreds: AwsCreds =
22      AwsCreds("mockKinesisAccessKey", "mockKinesisSecretKey")
23  }
24  
25  // The kinesis-mock uses a self-signed certificate
26  private val trustAllCertificates =
27    AttributeMap
28      .builder()
29      .put(
30        SdkHttpConfigurationOption.TRUST_ALL_CERTIFICATES,
31        java.lang.Boolean.TRUE
32      )
33      .build()
34  
35  def nettyClient: SdkAsyncHttpClient =
36    NettyNioAsyncHttpClient
37      .builder()
38      .buildWithDefaults(trustAllCertificates)
39
40  val kinesisClient: KinesisAsyncClient = 
41    KinesisAsyncClient
42        .builder()
43        .httpClient(nettyClient)
44        .region(Region.US_EAST_1)
45        .credentialsProvider(AwsCreds.LocalCreds)
46        .endpointOverride(URI.create(s"https://localhost:4567"))
47        .build()
48}

Configuring the KPL

1import com.amazonaws.auth.{AWSCredentials, AWSCredentialsProvider}
2
3object MyApp {
4  // A mock credentials provider
5  final case class AwsCreds(accessKey: String, secretKey: String)
6    extends AWSCredentials
7    with AWSCredentialsProvider {
8    override def getAWSAccessKeyId: String = accessKey
9    override def getAWSSecretKey: String = secretKey
10    override def getCredentials: AWSCredentials = this
11    override def refresh(): Unit = ()
12  }
13
14  object AwsCreds {
15    val LocalCreds: AwsCreds =
16      AwsCreds("mockKinesisAccessKey", "mockKinesisSecretKey")
17  }
18  
19  val kplProducer = new KinesisProducer(
20    new KinesisProducerConfiguration()
21      .setCredentialsProvider(AwsCreds.LocalCreds)
22      .setRegion(Regions.US_EAST_1.getName)
23      .setKinesisEndpoint("localhost")
24      .setKinesisPort(4567L)
25      .setCloudwatchEndpoint("localhost")
26      .setCloudwatchPort(4566L) // Using localstack's Cloudwatch port
27      .setVerifyCertificate(false)
28    )
29}

Configuring the KCL

1import software.amazon.awssdk.auth.credentials.{AwsCredentials,AwsCredentialsProvider}
2import software.amazon.awssdk.http.SdkHttpConfigurationOption
3import software.amazon.awssdk.http.async.SdkAsyncHttpClient
4import software.amazon.awssdk.http.nio.netty.NettyNioAsyncHttpClient
5import software.amazon.awssdk.regions.Region
6import software.amazon.awssdk.services.cloudwatch.CloudWatchAsyncClient
7import software.amazon.awssdk.services.dynamodb.DynamoDbAsyncClient
8import software.amazon.awssdk.services.kinesis.KinesisAsyncClient
9import software.amazon.awssdk.services.kinesis.model._
10import software.amazon.awssdk.utils.AttributeMap
11import software.amazon.kinesis.checkpoint.CheckpointConfig
12import software.amazon.kinesis.common._
13import software.amazon.kinesis.coordinator.{CoordinatorConfig, Scheduler}
14import software.amazon.kinesis.leases.LeaseManagementConfig
15import software.amazon.kinesis.lifecycle.LifecycleConfig
16import software.amazon.kinesis.lifecycle.events._
17import software.amazon.kinesis.metrics.MetricsConfig
18import software.amazon.kinesis.processor._
19import software.amazon.kinesis.retrieval.polling.PollingConfig
20import software.amazon.kinesis.retrieval.RetrievalConfig
21
22object MyApp {
23  // A mock credentials provider
24  final case class AwsCreds(accessKey: String, secretKey: String)
25    extends AwsCredentials
26    with AwsCredentialsProvider {
27    override def accessKeyId(): String = accessKey
28    override def secretAccessKey(): String = secretKey
29    override def resolveCredentials(): AwsCredentials = this
30  }
31
32  object AwsCreds {
33    val LocalCreds: AwsCreds =
34      AwsCreds("mockKinesisAccessKey", "mockKinesisSecretKey")
35  }
36  
37  // The kinesis-mock uses a self-signed certificate
38  private val trustAllCertificates =
39    AttributeMap
40      .builder()
41      .put(
42        SdkHttpConfigurationOption.TRUST_ALL_CERTIFICATES,
43        java.lang.Boolean.TRUE
44      )
45      .build()
46  
47  def nettyClient: SdkAsyncHttpClient =
48    NettyNioAsyncHttpClient
49      .builder()
50      .buildWithDefaults(trustAllCertificates)
51
52  val kinesisClient: KinesisAsyncClient = 
53    KinesisAsyncClient
54      .builder()
55      .httpClient(nettyClient)
56      .region(Region.US_EAST_1)
57      .credentialsProvider(AwsCreds.LocalCreds)
58      .endpointOverride(URI.create(s"https://localhost:4567"))
59      .build()
60
61  val cloudwatchClient: CloudWatchAsyncClient - 
62    CloudWatchAsyncClient
63      .builder()
64      .httpClient(nettyClient)
65      .region(Region.US_EAST_1)
66      .credentialsProvider(AwsCreds.LocalCreds)
67      .endpointOverride(URI.create(s"https://localhost:4566")) // localstack port
68      .build()
69
70  val dynamoClient: DynamoDbAsyncClient - 
71    DynamoDbAsyncClient
72      .builder()
73      .httpClient(nettyClient)
74      .region(Region.US_EAST_1)
75      .credentialsProvider(AwsCreds.LocalCreds)
76      .endpointOverride(URI.create(s"http://localhost:8000")) // dynamodb-local port
77      .build()
78    
79  object KCLRecordProcessor extends ShardRecordProcessor {
80    override def initialize(x: InitializationInput): Unit = ()
81    override def processRecords(x: ProcessRecordsInput): Unit = println(s"GOT RECORDS: $x")
82    override def leaseLost(x: LeaseLostInput): Unit = ()
83    override def shardEnded(x: ShardEndedInput): Unit = ()
84    override def shutdownRequested(x: ShutdownRequestedInput): Unit = ()
85  }
86
87  object KCLRecordProcessorFactory extends ShardRecordProcessorFactory {
88    override def shardRecordProcessor(): ShardRecordProcessor =
89      KCLRecordProcessor
90    override def shardRecordProcessor(
91      streamIdentifier: StreamIdentifier
92    ): ShardRecordProcessor = KCLRecordProcessor
93  }
94
95  val appName = "some-app-name"
96  val workerId = "some-worker-id"
97  val streamName = "some-stream-name"
98  // kinesis-mock only supports polling consumers today
99  val retrievalSpecificConfig = new PollingConfig(streamName, kinesisClient)
100  
101  // Consumer can be executed from this by running scheduler.run()
102  val scheduler = new Scheduler(
103    new CheckpointConfig(),
104    new CoordinatorConfig(appName)
105    .parentShardPollIntervalMillis(1000L),
106    new LeaseManagementConfig(
107      appName,
108      dynamoClient,
109      kinesisClient,
110      workerId
111    ).shardSyncIntervalMillis(1000L),
112    new LifecycleConfig(),
113    new MetricsConfig(cloudwatchClient, appName),
114    new ProcessorConfig(KCLRecordProcessorFactory),
115    new RetrievalConfig(
116      kinesisClient,
117      streamName,
118      appName
119    ).initialPositionInStreamExtended(
120    InitialPositionInStreamExtended.newInitialPosition(
121        InitialPositionInStream.TRIM_HORIZON
122    )
123    ).retrievalSpecificConfig(retrievalSpecificConfig)
124    .retrievalFactory(retrievalSpecificConfig.retrievalFactory())
125  )
126}

Known issues

• Does not currently support SubscribeToShard due to lack of push-promise support (https://github.com/http4s/http4s/issues/4624)