Have a pretty simple test.sql:

SELECT 'CREATE DATABASE test_dev'
WHERE NOT EXISTS (SELECT FROM pg_database WHERE datname = 'test_dev')\gexec

\c test_dev

CREATE TABLE IF NOT EXISTS test_table (
  username varchar(255)
);

INSERT INTO test_table(username)
VALUES ('test name');

Doing the following does what I expected it to do:

Dockerfile.dev

FROM postgres:11-alpine
EXPOSE 5432
COPY ./db/*.sql /docker-entrypoint-initdb.d/

docker build -t testproj/postgres -f db/Dockerfile.dev .

docker run -p 5432:5432 testproj/postgres

This creates the database, switches to it, creates a table, and inserts the values.

Now I'm trying to do the same in Kubernetes with Skaffold, but nothing really seems to happen: no error messages, but nothing changed in postgres

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: init-script
spec:
  accessModes:
    - ReadWriteMany
  resources:
    requests:
      storage: 500Mi
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: postgres-storage
spec:
  accessModes:
    - ReadWriteMany
  resources:
    requests:
      storage: 10Gi

apiVersion: apps/v1
kind: Deployment
metadata:
  name: postgres-deployment
spec:
  replicas: 1
  selector:
    matchLabels:
      component: postgres
  template:
    metadata:
      labels:
        component: postgres
    spec:
      volumes:
        - name: postgres-storage
          persistentVolumeClaim:
            claimName: postgres-storage
        - name: init-script
          persistentVolumeClaim:
            claimName: init-script
      containers:
        - name: postgres
          image: postgres
          ports:
            - containerPort: 5432
          volumeMounts:
            - name: postgres-storage
              mountPath: /var/lib/postgresql/data
              subPath: postgres
            - name: init-script
              mountPath: /docker-entrypoint-initdb.d
---
apiVersion: v1
kind: Service
metadata:
  name: postgres-cluster-ip-service
spec:
  type: ClusterIP
  selector:
    component: postgres
  ports:
    - port: 5432
      targetPort: 5432

What I am doing wrong here?

Basically tried to follow the answers here, but isn't panning out. Sounded like I needed to move the .sql to a persistent volume.

https://stackoverflow.com/a/53069399/3123109