Enable logging in postgresql using docker-compose - postgresql

Question

I am using Postgres as a service in my docker-compose file. I want logging to log file to be enabled when I do docker-compose up. One way to enable logging is by editing postgres.conf file but it's not useful in this case. One other way is to do something like this
docker run --name postgresql -itd --restart always sameersbn/postgresql:10-2 -c logging_collector=on
but this isn't useful too cause I am not starting it from an image but as a docker-compose service. Any idea how I can start the docker-compose up with logging enabled in Postgres???

Answer 1

Here is the docker-compose to run the command -c in compose
version: '3.6'
services:
postgresql:
image: postgres:11.5
container_name: platops_postgres
volumes: ['platops-data:/var/lib/postgresql/data/', 'postgress-logs:/var/log/postgresql/']
command: ["postgres", "-c", "logging_collector=on", "-c", "log_directory=/logs", "-c", "log_filename=postgresql.log", "-c", "log_statement=all"]
environment:
- POSTGRES_USER=postgresql
- POSTGRES_PASSWORD=postgresql
ports: ['5432:5432']
volumes:
platops-data: {}
# uncomment and set the path of the folder to maintain persistancy
# data-postgresql:
# driver: local
# driver_opts:
# o: bind
# type: none
# device: /path/of/db/postgres/data/
postgress-logs: {}
# uncomment and set the path of the folder to maintain persistancy
# data-postgresql:
# driver: local
# driver_opts:
# o: bind
# type: none
# device: /path/of/db/postgres/logs/
For more information, you can check with the containers/postgress

Answer 2

Just like you command with docker run:
docker run --name postgresql -itd --restart always sameersbn/postgresql:10-2 -c logging_collector=on
that you add the -c logging_collector=on arguments for the ENTRYPOINT ["/sbin/entrypoint.sh"] to enable logging. (Dockerfile).
In docker-compose.yml file, use command: like this:
version: "3.7"
services:
database:
image: sameersbn/postgresql:10-2
command: "-c logging_collector=on"
# ......
When Postgresql contaienr run, it will run command: /sbin/entrypoint.sh -c logging_collector=on.