Kubernetes Controller

The JetStream controllers allow you to manage NATS JetStream Streams and Consumers via K8S CRDs. You can find more info on how to deploy and usage here. Below you can find an example of how to create a stream and a couple of consumers:

---
apiVersion: jetstream.nats.io/v1beta1
kind: Stream
metadata:
name: mystream
spec:
name: mystream
subjects: ["orders.*"]
storage: memory
maxAge: 1h
---
apiVersion: jetstream.nats.io/v1beta1
kind: Consumer
metadata:
name: my-push-consumer
spec:
streamName: mystream
durableName: my-push-consumer
deliverSubject: my-push-consumer.orders
deliverPolicy: last
ackPolicy: none
replayPolicy: instant
---
apiVersion: jetstream.nats.io/v1beta1
kind: Consumer
metadata:
name: my-pull-consumer
spec:
streamName: mystream
durableName: my-pull-consumer
deliverPolicy: all
filterSubject: orders.received
maxDeliver: 20
ackPolicy: explicit

Once the CRDs are installed you can use kubectl to manage the streams and consumers as follows:

$ kubectl get streams
NAME STATE STREAM NAME SUBJECTS
mystream Created mystream [orders.*]
$ kubectl get consumers
NAME STATE STREAM CONSUMER ACK POLICY
my-pull-consumer Created mystream my-pull-consumer explicit
my-push-consumer Created mystream my-push-consumer none
# If you end up in an Errored state, run kubectl describe for more info.
# kubectl describe streams mystream
# kubectl describe consumers my-pull-consumer
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