Example of NATS with externalAccess

[andretadeu]

Hi,

I am trying to configure NATS for external access by following the documentation in Setting up External Access, however I am not having much success on it. I tried both without load balancer or with it.

values.yaml without load balancer configurations:

nats:
  bootconfig:
    image: natsio/nats-boot-config:latest
    pullPolicy: IfNotPresent
  nats:
    enabled: true
    externalAccess: true
    advertise: true
    serviceAccount:
      name: "nats-server"

    jetstream:
      enabled: true
      memStorage:
        enabled: true
        size: 2Gi

values.yaml with load balancer configurations:

nats:
  bootconfig:
    image: natsio/nats-boot-config:latest
    pullPolicy: IfNotPresent
  nats:
    enabled: true
    externalAccess: true
    advertise: true
    serviceAccount:
      name: "nats-server"

    jetstream:
      enabled: true
      memStorage:
        enabled: true
        size: 2Gi
  cluster:
    enabled: true
    noAdvertise: true
  leafnodes:
    enabled: true
    noAdvertise: true
  natsbox:
    image: natsio/nats-box:latest
    enabled: true

But I am always having the following issue:

NAME                            READY   STATUS                  RESTARTS        AGE
inf-nats-box-5fccdd8f55-glczt   1/1     Running                 0               19m
mongodb-0                       1/1     Running                 0               19m
mongodb-1                       1/1     Running                 0               19m
mongodb-2                       1/1     Running                 0               19m
inf-nats-0                      0/3     Init:CrashLoopBackOff   8 (3m19s ago)   19m

and

[<redacted> ~]$ microk8s kubectl -n ipm-inf logs inf-nats-0
Defaulted container "nats" out of: nats, reloader, metrics, bootconfig (init)
Error from server (BadRequest): container "nats" in pod "inf-nats-0" is waiting to start: PodInitializing

What is missing in the configurations here?

Edit 1: redacted user and host

[wallyqs]

for microk8s I think you may have to use something like a nodeport, or is there a load balancer option available?

[andretadeu]

I have not setup a service, as I am trying to read and understand the documentation. For now I have:

[<redacted> terraform-inf-am]$ microk8s kubectl -n ipm-inf get svc
NAME               TYPE        CLUSTER-IP   EXTERNAL-IP   PORT(S)                                                 AGE
inf-nats           ClusterIP   None         <none>        4222/TCP,6222/TCP,8222/TCP,7777/TCP,7422/TCP,7522/TCP   47m
mongodb-headless   ClusterIP   None         <none>        27017/TCP

because I did not create any Service to expose a port. I will try this first.

Edit 1: Redacted user and host

[wallyqs]

not very familiar with microk8s, but I think you may need to use a nodeport for k8s which we don't support out of the box in the helm chart or have examples for, so there might be a bit of a learning curve there... The external access is more convenient when you have nodes that have public ips like in an EKS cluster for example.

[andretadeu]

Does this PR make sense? PR-568