I have an application running on a pure docker environment. I wanted to deploy that in a k8s. Hence I created config maps, deployments etc. Below is the config file before deploying to k8s.

  config:
    message:
      - type: "fusion:expense:expense_type:v1"
        versions:
          - version: "v1"
            handler:
              request_uri: "http://localhost:8082/api/v1/expenses/"
          - version: "v2"
            handler:
              request_uri: "http://localhost:8082/api/v2/expenses/"
      - type: "card_type"
        versions:
          - version: "v1"
            handler:
              request_uri: "http://localhost:8082/api/v1/cardtype"
    ossprovider:
      endpoint: "http://localhost:19000"

adaptors:
  endpoint: http://localhost:8092/adaptors/

I created a service like

kind: Service
metadata:
  name: fin-service
spec:
  type: ClusterIP
  ports:
    - port: 8090
      targetPort: 8090 
      protocol: TCP
      name: http
    - port: 8082
      targetPort: 8082 
      protocol: TCP
    - port: 19000
      targetPort: 19000
      protocol: TCP
  selector:
    fin-app

My deployment looks like this:

apiVersion: apps/v1
kind: Deployment
metadata:
  name: fin
  namespace: {{ .Values.namespace }}
  labels:
    fin
spec:
  replicas: {{ .Values.replicaCount }}
  selector:
    matchLabels:
      fin
  template:
    metadata:
      labels:
        fin
    spec:
    {{- with .Values.imagePullSecrets }}
      imagePullSecrets:
        {{- toYaml . | nindent 8 }}
    {{- end }}
      containers:
        - name: {{ .Values.containers.oss_messaginglayer.name }}
          image: {{ .Values.image.oss_messaginglayer.repository }}
          imagePullPolicy: {{ .Values.image.pullPolicy }}
          ports:
            - name: http
              containerPort: 8090
              protocol: TCP

Since I created a service, I wanted to use this service end point in the config file as fin-service instead of localhost.

app:
  config:
    message:
      - type: "fusion:expense:expense_type:v1"
        versions:
          - version: "v1"
            handler:
              request_uri: "http://fin-service:8082/api/v1/expenses/"
          - version: "v2"
            handler:
              request_uri: "http://fin-service:8082/api/v2/expenses/"
      - type: "card_type"
        versions:
          - version: "v1"
            handler:
              request_uri: "http://fin-service:8082/api/v1/cardtype"
    ossprovider:
      endpoint: "http://fin-service:19000"

adaptors:
  endpoint: http://fin-service:8092/adaptors/

But I get connection refused errors at http://fin-service:19000. Where am I going off the track?