I'm trying to find a good way to populate a database with initial data for a simple application. I'm using a tutorial from realpython.com as a starting point. I then run a simple python script after the database is created to add a single entry, but when I do this the data is added multiple times even though I only call the script once. result
population script (test.py):
from app import db
from models import *
t = Post("Hello 3")
db.session.add(t)
db.session.commit()
edit:
Here is the docker-compose file which i use to build the project:
web:
restart: always
build: ./web
expose:
- "8000"
links:
- postgres:postgres
volumes:
- /usr/src/app/static
env_file: .env
command: /usr/local/bin/gunicorn -w 2 -b :8000 app:app
nginx:
restart: always
build: ./nginx/
ports:
- "80:80"
volumes:
- /www/static
volumes_from:
- web
links:
- web:web
data:
restart: always
image: postgres:latest
volumes:
- /var/lib/postgresql
command: "true"
postgres:
restart: always
image: postgres:latest
volumes_from:
- data
ports:
- "5432:5432"
it references two different Dockerfiles:
Dockerfile #1 which builds the App container and is 1 line:
FROM python:3.4-onbuild
Dockerfile #2 is used to build the nginx container
FROM tutum/nginx
RUN rm /etc/nginx/sites-enabled/default
ADD sites-enabled/ /etc/nginx/sites-enabled
edit2:
Some people have suggested that the data was persisting over several runs, and that was my initial thought as well. This is not the case, as I remove all active docker containers via docker rm before testing. Also the number of "extra" data is not consistent, ranging randomly from 3-6 in the few tests that I have run so far.
It turns out this is a bug related to using the run command on containers with the "restart: always" instruction in the docker-compose/Dockerfile. In order to resolve this issue without a bug fix I removed the "restart: always" from the web container.
related issue: https://github.com/docker/compose/issues/1013
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.