Kubernetes : Golang application container does not start - docker

Question

I have simple golang application which talks to postgres database. The posrgres container is working as expected However my golang application does not start.
In my config.go the environment variables is specified as
type Config struct {
Port uint `env:"PORT" envDefault:"8000"`
PostgresURL string `env:"POSTGRES_URL" envDefault:"postgres://user:pass#127.0.0.1/simple-service"`
}
My golang application service and deployment yaml looks like:
apiVersion: v1
kind: Service
metadata:
name: simple-service-webapp-service
labels:
app: simple-service-webapp
spec:
ports:
- port: 8080
name: http
selector:
app: simple-service-webapp
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: simple-service-webapp-v1
labels:
version: v1
spec:
replicas: 1
selector:
matchLabels:
app: simple-service-webapp
version: v1
template:
metadata:
labels:
app: simple-service-webapp
version: v1
spec:
containers:
- name: simple-service-webapp
image: docker.io/225517/simple-service-webapp:v1
resources:
requests:
cpu: 100m
imagePullPolicy: Always
ports:
- containerPort: 8080
env:
- name: POSTGRES_HOST
value: postgresdb
- name: POSTGRES_PORT
value: "5432"
- name: POSTGRES_DB
value: simple-service
- name: POSTGRES_USER
value: user
- name: POSTGRES_PASSWORD
value: pass
readinessProbe:
httpGet:
path: /live
port: 8080
---
Below is the service and deployment yaml file for postgres service
apiVersion: v1
kind: Service
metadata:
name: postgresdb
labels:
app: postgresdb
spec:
ports:
- port: 5432
name: tcp
selector:
app: postgresdb
type: ClusterIP
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: postgresdb-v1
labels:
app: postgresdb
version: v1
spec:
replicas: 1
selector:
matchLabels:
app: postgresdb
version: v1
template:
metadata:
labels:
app: postgresdb
version: v1
spec:
containers:
- name: postgresdb
image: postgres
imagePullPolicy: IfNotPresent
ports:
- containerPort: 5432
env:
- name: POSTGRES_DB
value: simple-service
- name: POSTGRES_USER
value: user
- name: POSTGRES_PASSWORD
value: pass
readinessProbe:
exec:
command: ["psql", "-W", "pass", "-U", "user", "-d", "simple-service", "-c", "SELECT 1"]
initialDelaySeconds: 15
timeoutSeconds: 2
livenessProbe:
exec:
command: ["psql", "-W", "pass", "-U", "user", "-d", "simple-service", "-c", "SELECT 1"]
initialDelaySeconds: 45
timeoutSeconds: 2
---
Do I need to change anything in config.go? Could you please help thanks!

Answer 1

This is a community wiki answer based on the info from the comments, feel free to expand on it. I'm placing this for better visibility for the community.
Question was solved by setting appropriate postgres DB port (5432) and rewriting config so it look for the correct variable set on the deployment.