Kubernetes: Pod is not created after applying deployment - kubernetes

Question

I have a problem with Kubernetes on my local machine. I want to create a pod with a database so I prepared a deployment file with service.
apiVersion: v1
kind: Service
metadata:
name: bid-service-db
labels:
app: bid-service-db
tier: database
spec:
ports:
- name: "5432"
port: 5432
targetPort: 5432
selector:
app: bid-service-db
tier: database
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: bid-service-db
labels:
app: bid-service-db
tier: database
spec:
selector:
matchLabels:
app: bid-service-db
strategy:
type: Recreate
template:
metadata:
labels:
app: bid-service-db
tier: database
spec:
containers:
- env:
- name: POSTGRES_DB
value: mydb
- name: POSTGRES_PASSWORD
value: password
- name: POSTGRES_USER
value: postgres
image: postgres:13
imagePullPolicy: Never
name: bid-service-db
ports:
- containerPort: 5432
name: bid-service-db
resources: {}
restartPolicy: Always
serviceAccountName: ""
volumes:
- name: postgres-persistance-storage
persistentVolumeClaim:
claimName: bid-service-db-volume
status: {}
I am applying this file with k apply -f bid-db-deployment.yaml. k get all returns that only service was created, but pod not started. What can I do in this case? How to troubleshoot that?

Answer 1

if you didn't get any errors on the 'apply' you can get the failure reason by:
kubectl describe deployment/DEPLOMENT_NAME
Also, you can take only the deployment part and put it in a separate YAML file and see if you get errors.

Answer 2

Since after restart the cluster it worked for you, a good ideia next times should be verify the logs from kube-api and kube-controller pods using the command:
kubectl logs pn kube-system <kube-api/controller_pod_name>
To get the list of your deployments in all name space you can use the command:
kubectl get deployments -A