Data directory "/var/lib/postgresql/data/pgdata" has wrong ownership

Docker Desktop
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Hi Vishal,
I’m still learning Docker too. I verified that you are correct. After I did a “docker-compose down”, I no longer had my data.

The response by Michael above provided the correct solution. I updated my docker compose file to be:

version: '2'

# docker volume create --name data -d local

services:
  postgres:
    restart: always
    container_name: postgres_db
    image: postgres:latest
    #tty: true
    ports:
      - "5432:5432"
    volumes:
       - data:/var/lib/postgresql/data
    environment:
      POSTGRES_USER: postgres
      POSTGRES_PASSWORD: docker
      POSTGRES_DB: db
      #PGDATA: /tmp

volumes:
  data:
    external: true

After, creating the “data” volume, I did a docker-compose. Everything initialized fine (no errors). I then created a database and loaded it with data. I then did a docker-compose down followed by a docker-compose up and the data was still there.

The thing that I am unsure of is where on the disk is this data stored. docker volume inspect does not provide any meaningful information.