7-redis

README

Redis storage example

Using Redis as option of storage.

This example has an Emitter and one Processor. The emitter generates events with random keys (user_id) consumed by Kafka. The processor consumes this events and uses redis as storage/cache.

Usage

Run a local Kafka cluster and redis server by calling make start in folder examples/. This will start a kafka cluster accessible under 127.0.0.1:9092 and a redis service under 127.0.0.1:6379 if you want to use a different configuration you need to adjust the config file config.yaml.

The config file also has some more options to set:

kafka:
  brokers:
    - "127.0.0.1:9092"
  group: "examples"
  stream: "events"
  redis: "127.0.0.1:6379"
  namespace: "producer"

Where:

• brokers : slice of kafka brokers hosts.
• group : group name of this example belongs.
• stream: stream name of this example belongs.
• redis: address of redis (localhost:6379).
• namespace: namespace distinguish applications that write to the same keys on Redis.

After starting the machines and adjusting the config run the example with go run 7-redis/*.go -config 7-redis/config.yaml.

The events are produced and consumed by Kafka with random keys. It's possible run several of the same binary and check the behaviour of kafka rebalancing and removing partitions.

After you are finished with the example you may stop the Kafka cluster and redis server by entering make stop in the examples/ folder.