I am trying to set up a connection between Google Cloud Postgres and Google Kubernetes Engine using a CloudSQL proxy. If I check out the logs of both workloads:

I am getting:

2021-02-02T11:42:09.748706102Z2021/02/02 11:42:09 dial tcp 127.0.0.1:5432: connect: connection refused

I am writing down all the steps that I performed with all the real file keywords or file names.

Steps

1. Set up a google cloud cluster with 3 nodes.
2. Set up a Postgres instance of Google Cloud SQL. Add a new user gothamuser and password is gothampass: Running on 5432 port
3. Set up an I am service account through gothamcity-gke@miles-789.iam.gserviceaccount.com and saved the config.json file.
4. Link of Docker file [.1]
5. Build the container using gcloud builds submit --tag gcr.io/miles-789/gothamcity:0.10 .
6. Link of Deployment.yaml [.2]
7. Execute deployment file using kubectl create -f deployment.yaml
8. Link of service.yaml[3]
9. Execute service file using kubectl create -f service.yaml
10. Created cloud SQL instances using kubectl create secret generic cloudsql-instance-credentials --from-file=cred.json=/Users/gotham/Downloads/cofig.json
11. Created cloudsql-db credentials using kubectl create secret generic cloudsql-db-credentials --from-literal=username=gothamuser --from-literal=password=gothampass. Didn't mention the database name because I have to connect multiple databases.
12. Added cloudsql-db-credentials and cloudsql-instance-credentials in psql.yaml file
13. Link of psql.yaml file [4]
14. Execute this file using kubectl create -f psql.yaml
15. DB Configurations on Go project [5]

Screenshot of kubectl commands

1 kubectl get nodes

2 kubectl get pods

Mentioned Files

[1.] Docker

FROM golang:alpine AS build-env
ENV GOPATH /go
WORKDIR /go/src
COPY . /go/src/gothamcity

RUN cd /go/src/gothamcity && go build .

FROM alpine
RUN apk update && apk add ca-certificates && rm -rf /var/cache/apk*

WORKDIR /app
COPY --from=build-env /go/src/gothamcity/gothamcity /app
COPY .env /app

EXPOSE 5432
EXPOSE 8080

ENTRYPOINT [ "./gothamcity" ]

[2.] Deployment.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: gothamcity-backend
spec:
  replicas: 1
  selector:
    matchLabels:
      app: gothamcity
  template:
    metadata:
      labels:
        app: gothamcity
    spec:
      containers:
      - name: gothamcity-app
        image: gcr.io/miles-789/gothamcity:0.10
        ports:
        - containerPort: 8080
        env:
          - name: PORT
            value: "8080"

[3] Service.yaml

apiVersion: v1
kind: Service
metadata:
  name: gothamcity
spec:
  type: LoadBalancer
  selector:
    app: gothamcity
  ports:
  - port: 80
    targetPort: 8080

[4] psql.yaml

 apiVersion: apps/v1
kind: Deployment
metadata:
  name: gothamcity-psql-proxy
spec:
  selector:
    matchLabels:
      app: gothamcity
  template:
    metadata:
      labels:
        app: gothamcity
    spec:
      containers:
      - image: gcr.io/miles-789/gothamcity:0.10
        name: gothamcity-app
        env:
        - namee: DB_HOST
          value: 127.0.0.1
        - name: DB_USER
          valueFrom:
            secretKeyRef:
              name: cloudsql-db-credentials
              key: username
        - name: DB_PASS
          valueFrom:
            secretKeyRef:
              name: cloudsql-db-credentials
              key: password
        - name: DB_NAME
          valueFrom:
            secretKeyRef:
              name: cloudsql-db-credentials
              key: database
      - name: cloud-sql-proxy
        image: gcr.io/cloudsql-docker/gce-proxy:1.17
        command:
          - "/cloud_sql_proxy"
          - "-instances=miles-789:europe-east1:gotham-miles-v1=tcp:5432"
          - "-credential_file=/secrets/config.json"
        securityContext:
          runAsNonRoot: true
        volumeMounts:
        - name: cloudsql-instance-credentials
          mountPath: /secrets/
          readOnly: true
      volumes:
      - name: cloudsql-instance-credentials
        secret:
          secretName: cloudsql-instance-credentials

[5] DB Configurations

package dataservices

import "os"

const (
    dbhost = "DBHOST"
    dbport = "DBPORT"
    dbuser = "DBUSER"
    dbpass = "DBPASS"
    dbname = "DBNAME"
    env    = "ENV"
)

func dbConfig(database string) map[string]string {
    var host = os.Getenv("DB_HOST")
    var user = os.Getenv("DB_USER")
    var password = os.Getenv("DB_PASS")
    var name = database
    var port = "5432"
    conf := make(map[string]string)
    conf[dbhost] = host
    conf[dbport] = port
    conf[dbuser] = user
    conf[dbpass] = password
    conf[dbname] = name
    return conf
}

I can't understand What am i doing wrong here. Is it a typo or I am missing some kind of configuration here.