Hvordan tilpasser man konfigurationsfilen for det officielle PostgreSQL Docker-billede?

Med Docker Compose

Når du arbejder med Docker Compose, kan du bruge command: postgres -c option=value i din docker-compose.yml for at konfigurere Postgres.

Dette får for eksempel Postgres til at logge på en fil:

command: postgres -c logging_collector=on -c log_destination=stderr -c log_directory=/logs

Tilpasning af Vojtech Viteks svar, kan du bruge

command: postgres -c config_file=/etc/postgresql.conf

for at ændre den konfigurationsfil Postgres vil bruge. Du skal montere din brugerdefinerede konfigurationsfil med en volumen:

volumes:
   - ./customPostgresql.conf:/etc/postgresql.conf

Her er docker-compose.yml af min applikation, der viser, hvordan man konfigurerer Postgres:

# Start the app using docker-compose pull && docker-compose up to make sure you have the latest image
version: '2.1'
services:
  myApp:
    image: registry.gitlab.com/bullbytes/myApp:latest
    networks:
      - myApp-network
  db:
     image: postgres:9.6.1
     # Make Postgres log to a file.
     # More on logging with Postgres: https://www.postgresql.org/docs/current/static/runtime-config-logging.html
     command: postgres -c logging_collector=on -c log_destination=stderr -c log_directory=/logs
     environment:
       # Provide the password via an environment variable. If the variable is unset or empty, use a default password
       # Explanation of this shell feature: https://unix.stackexchange.com/questions/122845/using-a-b-for-variable-assignment-in-scripts/122848#122848
       - POSTGRES_PASSWORD=${POSTGRES_PASSWORD:-4WXUms893U6j4GE&Hvk3S*hqcqebFgo!vZi}
     # If on a non-Linux OS, make sure you share the drive used here. Go to Docker's settings -> Shared Drives
     volumes:
       # Persist the data between container invocations
       - postgresVolume:/var/lib/postgresql/data
       - ./logs:/logs
     networks:
       myApp-network:
         # Our application can communicate with the database using this hostname
         aliases:
           - postgresForMyApp
networks:
  myApp-network:
    driver: bridge
# Creates a named volume to persist our data. When on a non-Linux OS, the volume's data will be in the Docker VM
# (e.g., MobyLinuxVM) in /var/lib/docker/volumes/
volumes:
  postgresVolume:

Tilladelse til at skrive til logbiblioteket

Bemærk, at når du er på Linux, skal logbiblioteket på værten have de rigtige tilladelser. Ellers får du den lidt misvisende fejl

chgroup ./logs docker && chmod 770 ./logs