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Chaos Simulate Slow Broker

This interceptor simulates slow responses from brokers.

This demo will run you through some of these use cases step-by-step.

View the full demo in realtime​

You can either follow all the steps manually, or watch the recording

Review the docker compose environment​

As can be seen from docker-compose.yaml the demo environment consists of the following services:

  • gateway1
  • gateway2
  • kafka-client
  • kafka1
  • kafka2
  • kafka3
  • schema-registry
cat docker-compose.yaml

Starting the docker environment​

Start all your docker processes, wait for them to be up and ready, then run in background

  • --wait: Wait for services to be running|healthy. Implies detached mode.
  • --detach: Detached mode: Run containers in the background
docker compose up --detach --wait

Creating topic slow-topic on gateway1​

Creating on gateway1:

  • Topic slow-topic with partitions:1 and replication-factor:1
kafka-topics \
    --bootstrap-server localhost:6969 \
    --replication-factor 1 \
    --partitions 1 \
    --create --if-not-exists \
    --topic slow-topic

Adding interceptor simulate-slow-broker​

Let's create the interceptor, instructing Conduktor Gateway to simulate slow responses from brokers.

step-06-simulate-slow-broker-interceptor.json:

{
  "kind" : "Interceptor",
  "apiVersion" : "gateway/v2",
  "metadata" : {
    "name" : "simulate-slow-broker"
  },
  "spec" : {
    "comment" : "Adding interceptor: simulate-slow-broker",
    "pluginClass" : "io.conduktor.gateway.interceptor.chaos.SimulateSlowBrokerPlugin",
    "priority" : 100,
    "config" : {
      "rateInPercent" : 100,
      "minLatencyMs" : 2000,
      "maxLatencyMs" : 2001
    }
  }
}
curl \
    --silent \
    --request PUT "http://localhost:8888/gateway/v2/interceptor" \
    --header "Content-Type: application/json" \
    --user "admin:conduktor" \
    --data @step-06-simulate-slow-broker-interceptor.json | jq

Listing interceptors​

Listing interceptors on gateway1

curl \
    --silent \
    --request GET "http://localhost:8888/gateway/v2/interceptor" \
    --user "admin:conduktor" | jq

Let's produce some records to our created topic​

This should produce output similar to this:

11 records sent, 2,1 records/sec (0,00 MB/sec), 2683,6 ms avg latency, 4303,0 ms max latency.
64 records sent, 11,2 records/sec (0,00 MB/sec), 3067,1 ms avg latency, 4210,0 ms max latency.
100 records sent, 7,738141 records/sec (0,00 MB/sec), 3022,77 ms avg latency, 4303,00 ms max latency, 2960 ms 50th, 3902 ms 95th, 4303 ms 99th, 4303 ms 99.9th.
kafka-producer-perf-test \
  --producer-props \
      bootstrap.servers=localhost:6969 \
  --record-size 10 \
  --throughput 1 \
  --num-records 10 \
  --topic slow-topic

Tearing down the docker environment​

Remove all your docker processes and associated volumes

  • --volumes: Remove named volumes declared in the "volumes" section of the Compose file and anonymous volumes attached to containers.
docker compose down --volumes

Conclusion

Yes, Chaos Simulate Slow Broker is simple as it!