Deploying Apache Kafka on Akash using the official apache/kafka
Docker image involves several steps, including preparing the SDL file, deploying it to the Akash network, and verifying the deployment. Follow the guide below:
Step 1: Prepare the SDL File
Create an SDL (Service Definition Language) file to define your Kafka deployment. Here’s an example of an SDL file (kafka-deployment.yml
):
version: "2.0"
services: kafka: image: apache/kafka:latest env: - KAFKA_BROKER_ID=1 - KAFKA_ZOOKEEPER_CONNECT=zookeeper:2181 - KAFKA_ADVERTISED_LISTENERS=PLAINTEXT://{AKASH_HOST}:9092 - KAFKA_LISTENERS=PLAINTEXT://0.0.0.0:9092 expose: - port: 9092 as: 9092 to: - global
zookeeper: image: bitnami/zookeeper:latest env: - ALLOW_ANONYMOUS_LOGIN=yes expose: - port: 2181 as: 2181 to: - global
profiles: compute: kafka: resources: cpu: units: 0.5 memory: size: 1Gi storage: size: 5Gi zookeeper: resources: cpu: units: 0.25 memory: size: 512Mi storage: size: 2Gi
placement: akash: attributes: region: us-west signedBy: anyOf: - akash pricing: kafka: denom: uakt amount: 500 zookeeper: denom: uakt amount: 300
deployment: kafka: profile: kafka count: 1 zookeeper: profile: zookeeper count: 1
Key Notes:
- Replace
{AKASH_HOST}
with the hostname or IP of your Akash deployment (it will be assigned later). zookeeper
is required as Kafka relies on it for distributed coordination.- Adjust resource and pricing configurations based on your requirements.
Step 2: Deploy the SDL to Akash
-
Install Akash CLI: Ensure you have the Akash CLI installed on your system. You can follow Akash’s official installation guide.
-
Authenticate to Akash:
akash wallet import <your-wallet-key> -
Submit the Deployment:
akash tx deployment create kafka-deployment.yml --from <your-wallet-address> -
Bid on the Deployment: Use the Akash CLI to review provider bids and accept a bid:
akash query market lease list --owner <your-wallet-address>akash tx market lease create --dseq <deployment-sequence> --from <your-wallet-address>
Step 3: Verify Deployment
-
Check Logs: Use the Akash CLI to view the logs and ensure the services are running:
akash provider lease-logs --dseq <deployment-sequence> --from <your-wallet-address> -
Access Kafka: Once deployed, Akash will assign an external hostname or IP for your Kafka service. You can retrieve it using:
akash provider lease-status --dseq <deployment-sequence> --from <your-wallet-address>Use the
KAFKA_ADVERTISED_LISTENERS
address to interact with Kafka clients.
Step 4: Test the Kafka Deployment
Install Kafka’s CLI tools on your local machine and configure them to interact with the deployed Kafka broker. Example commands:
-
Create a Topic:
kafka-topics.sh --create --topic test-topic --bootstrap-server <AKASH_HOST>:9092 -
Produce Messages:
kafka-console-producer.sh --topic test-topic --bootstrap-server <AKASH_HOST>:9092 -
Consume Messages:
kafka-console-consumer.sh --topic test-topic --from-beginning --bootstrap-server <AKASH_HOST>:9092
Step 5: Monitor and Scale
-
Monitor Resource Usage: Regularly monitor the usage of your deployment to ensure sufficient resources are allocated.
akash provider lease-status --dseq <deployment-sequence> -
Scale the Deployment: Modify the
count
value in the SDL file to scale Kafka or Zookeeper instances, then redeploy.
This guide provides a straightforward way to deploy Kafka on Akash using the official Docker image. You can further customize the SDL file or Kafka configuration to suit specific needs.