NATS

NATS is a lightweight and high-performance messaging solution used for microservices communication, IoT, and real-time applications. This managed service facilitates the management of NATS clusters, with support for Jetstream for persistent messaging.

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Configuration Example

Here is a YAML configuration example for a NATS cluster with Jetstream enabled and custom parameters:

apiVersion: apps.cozystack.io/v1alpha1
kind: NATS
metadata:
  name: nats-example
spec:
  external: false
  replicas: 3
  storageClass: "replicated"
  users:
    user1:
      password: "strongpassword"
    user2: {}
  jetstream:
    enabled: true
    size: 20Gi
  config:
    merge:
      server_name: "nats-example"
      authorization:
        token: "my-secret-token"
      jetstream:
        max_memory_store: 2Gi

Using the kubeconfig provided by Hikube and this example yaml, saved as a manifest.yaml file, you can easily test the application deployment using the following command:

kubectl apply -f manifest.yaml

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Configurable Parameters

General Parameters

Name	Description	Default Value
external	Allows external access from outside the cluster.	false
replicas	Number of replicas in the NATS cluster.	2
storageClass	Storage class used for data.	"replicated" or "local"

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Configuration Parameters

Name	Description	Default Value
users	Users configuration.	{}
jetstream.size	Size of persistent storage for Jetstream (message store).	10Gi
jetstream.enabled	Enables or disables Jetstream for persistent messaging.	true
config.merge	Additional configuration to merge into the NATS configuration.	{}
config.resolver	Additional configuration to merge for resolution in the NATS configuration.	{}

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Additional Resources

To learn more about NATS and Jetstream, check the following resources:

• Official NATS Documentation Comprehensive guide for configuring and using NATS.

• Jetstream Documentation Guide on using Jetstream for persistent messaging.