I've setup a K8S-cluster in GKE and installed RabbitMQ (from the marketplace) and Istio (via Helm). I can access rabbitMQ from pods until I enable the envoy proxy to be injected into these pods, but after that the traffic will not reach rabbitMQ, and I can't figure out how to enable traffic to the rabbitmq service.
There is a service rabbitmq-rabbitmq-svc (in the rabbitmq namespace) that is of type LoadBalancer. I've tried a simple busybox when I don't have envoy running and then I have no trouble telneting to rabbitmq (port 5672), but as soon as I try with automatic envoy injection envoy prevents the traffic. I tried unsuccessfully to add a DestinationRule. (I've added a rule but it makes no difference)
apiVersion: networking.istio.io/v1alpha3
kind: DestinationRule
metadata:
name: rabbitmq-rabbitmq-svc
spec:
host: rabbitmq.rabbitmq.svc.cluster.local
trafficPolicy:
loadBalancer:
simple: LEAST_CONNIt seems like it should be a simple solution, but I can't figure it out... :/
UPDATE Turns out it was a simple error in the hostname, ended up using this and it works:
apiVersion: networking.istio.io/v1alpha3
kind: DestinationRule
metadata:
name: rabbitmq-rabbitmq-svc
spec:
host: rabbitmq-rabbitmq-svc.rabbitmq.svc.cluster.localI maybe encounter the same problem with you before. But my app can connect rabbitmq by envoy after declaring epmd with 4369 port in rabbitmq service.
apiVersion: v1
kind: Service
metadata:
name: rabbitmq
labels:
app: rabbitmq
spec:
type: ClusterIP
ports:
- port: 5672
targetPort: 5672
name: message
- port: 4369
targetPort: 4369
name: epmd
- port: 15672
targetPort: 15672
name: management
selector:
app: rabbitmqTurns out it was a simple error in the hostname, the correct one was rabbitmq-rabbitmq-svc.rabbitmq.svc.cluster.local