I am running a kubernetes cluster on coreos.
I have a kubernetes replication controller that works fine. It looks like this:
id: "redis-controller"
kind: "ReplicationController"
apiVersion: "v1beta3"
metadata:
name: "rediscontroller"
lables:
name: "rediscontroller"
spec:
replicas: 1
selector:
name: "rediscontroller"
template:
metadata:
labels:
name: "rediscontroller"
spec:
containers:
- name: "rediscontroller"
image: "redis:3.0.2"
ports:
- name: "redisport"
hostPort: 6379
containerPort: 6379
protocol: "TCP"
But I have a service for said replication controller's pods that looks like this:
id: "redis-service"
kind: "Service"
apiVersion: "v1beta3"
metadata:
name: "redisservice"
spec:
ports:
- protocol: "TCP"
port: 6379
targetPort: 6379
selector:
name: "redissrv"
createExternalLoadBalancer: true
sessionAffinity: "ClientIP"
the journal for kube-proxy has this to say about the service:
Jul 06 21:18:31 core-01 kube-proxy[6896]: E0706 21:18:31.477535 6896 proxysocket.go:126] Failed to connect to balancer: failed to connect to an endpoint.
Jul 06 21:18:41 core-01 kube-proxy[6896]: E0706 21:18:41.353425 6896 proxysocket.go:81] Couldn't find an endpoint for default/redisservice:: missing service entry
From what I understand, I do have the service pointing at the right pod and right ports, but am I wrong?
UPDATE 1
I noticed another possible issue, after fixing the things mentioned by Alex, I noticed in other services, where it is using websockets, the service can't find an endpoint. Does this mean the service needs a http endpoint to poll?
Extra thing to check for.
Endpoints are only created if your deployment is considered healthy. If you have defined your readinessProbe incorrectly (mea culpa) or the deployment does not react to it correctly, an endpoint will not be created.
A few things look funny to me, with the first two being most important:
kubectl get svc
?name: "rediscontroller"
, so you should use that as your service selector as well.For you particular case, make sure the service spec has a containerPort
if you specified it in your Pod spec. See details: http://kubernetes.io/docs/user-guide/debugging-services/#my-service-is-missing-endpoints
Otherwise please setup through the official K8s service debugging guide:
http://kubernetes.io/docs/user-guide/debugging-services/
It has a step-by-step checklist of things to look out to from service to DNS to networking to kube proxy etc.