Hi, I have 2 container in one pod
- one container opens port 5222 (it's the Nats.io nats-streaming server)
- the other container is a busybox. From busybox I can telnet to that port
5222, so it is definitely opened...
Additionally I’ve created a Service nats1 exposing 5222. But from another
pod, connecting to that Service, I get a "connection refused” (doing
something like "telnet nats1 5222").
Other ports, opened by nats-streaming server, f.e. 4222, are working fine.
So what can happen, that a port is opened, but cannot be exposed by a
Service? (While other ports work fine...)
Regards Christopher
Some informations:
I did a workaround with a HAProxy, running in the nats pod, mapping port
5333 to internal 5222. That works, but I hope thats not the best solution...
Used k8s 1.4.6, Nats,io nats-streaming server (coded in Go)
service endpoints are there:
$ kubectl get endpoints nats1
NAME ENDPOINTS AGE
nats1 10.244.8.3:5222,10.244.8.3:4222,10.244.8.3:8222 26m
the YAML:
---
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
name: nats1-deployment
spec:
replicas: 1
template:
metadata:
labels:
name: nats1-app
spec:
containers:
- name: nats-streaming
image: nats-streaming
args:
- --cluster
- nats://localhost:5222
- --routes
- nats://nats2:5222
- -DV
ports:
- name: clusterport
containerPort: 5222
protocol: TCP
- name: busybox
image: busybox
command:
- sleep
- "3600"
---
kind: Service
apiVersion: v1
metadata:
name: nats1
spec:
ports:
- name: client
port: 4222
- name: cluster
port: 5222
targetPort: clusterport
selector:
name: nats1-app
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