I'm trying to make the database service available inside kubernetes for which I created the following service along with the endpoint

apiVersion: v1
kind: Service
metadata:
  name: postgres
  namespace: xp
  labels:
    service: postgres
    type: database
spec:
  type: ClusterIP
  selector:
    service: postgres
    type: database
  ports:
    - name: client
      protocol: TCP
      port: 5432
      targetPort: 5432
---
apiVersion: v1
kind: Endpoints
metadata:
  name: postgres
  namespace: xp
  labels:
    service: postgres
    type: database
subsets:
  - addresses:
      - ip: 172.19.0.2
    ports:
      - name: client
        port: 5432
        protocol: TCP

I tried verifying the service using busybox but nslookup and ping both fail for postgres.xp however pinging the IP 172.19.0.2 runs just fine. how do I expose the IP of an external service inside?

Is the database inside kubernetes or outside kubernetes? For a database outside of kubernetes and being accessed from a deployment inside kubernetes you only need a simple service or type

ExternalName

.

apiVersion: v1
kind: Service
metadata:
  name: mysql
spec:
  type: ExternalName
  externalName: mysql001.lan

it's outside, just running on docker

When the pod access db, it does it at a slow pace.

That is interesting. I had recently added an

Ingress

, using Traefik in my K3s (v1.23.8+k3s1) cluster, which was to a

Service

that was just an

ExternalName

to a web server I have elsewhere in a private subnet - this was just to add TLS security to this web service and publicly expose it. The public end runs terribly slowly, often with 10 second pauses between HTTPS calls. I haven't had time to investigate further, but it is an interesting coincidence that you are experiencing slow access to external systems using an

ExternalName

type of

Service

.

so my case is not the only one! all the external services are slow. can't ping them. but they are 🥱 😴 working. my colleague decided to try setup the same using microk8s to see if the result is similar or different