pycsw with Postgres

This is the modern (2020) way we are running pycsw on gamone. After lots of issues with sqlite as the db we moved to Postgres.

1. Modify docker-compose.yml following general format at https://github.com/axiom-data-science/docker-pycsw. This is what the relevant snippet looks like:

    image: kartoza/postgis:11.0-2.5
    stop_signal: SIGINT
    environment:
      POSTGRES_DBNAME: pycsw
      POSTGRES_USER: pycsw
      POSTGRES_PASS: pycsw
    volumes:
      - /opt/docker/postgres/data/db:/var/lib/postgresql

  pycsw:
    image: axiom/docker-pycsw:latest
    volumes:
      - /opt/docker/pycsw/usgs-cmg.cfg:/opt/pycsw/default.cfg
      - /opt/docker/pycsw/force:/force 
      - /opt/docker/pycsw/export:/export
      - /opt/docker/pycsw/store:/store

    ports:
      - "8000:8000"
    depends_on:
      - postgres

2. Update usgs-cmg.cfg to use postgres as the database. Insert this text at the relevant line, and comment out the sqlite line: database=postgresql://pycsw:pycsw@postgres/pycsw

3. Migrate directories. I moved the old pycsw directory to a backup and created a new, empty /opt/docker/pycsw directory. In here I placed the usgs-cmg.cfg file (updated with the postgres line above) and the export, force, store directores; otherwise the container won't start.

4. Start Postgres

docker-compose up -d postgres

4. Restart pycsw

docker-compose stop pycsw
docker-compose up -d pycsw