docker_practice/compose/django.md

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## 使 Django
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> `Python`
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使 `Docker Compose` `Django/PostgreSQL`
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Docker `Dockerfile` Docker
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```dockerfile
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FROM python:3
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ENV PYTHONUNBUFFERED 1
RUN mkdir /code
WORKDIR /code
ADD requirements.txt /code/
RUN pip install -r requirements.txt
ADD . /code/
```
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使 Python `Dockerfile` [](../image/create.md# Dockerfile ) [ Dockerfile 使](../dockerfile/README.md)
`requirements.txt`
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```bash
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Django>=1.8,<2.0
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psycopg2
```
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`docker-compose.yml` 西 web 使 Docker
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```yaml
version: "3"
services:
db:
image: postgres
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web:
build: .
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command: python3 manage.py runserver 0.0.0.0:8000
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volumes:
- .:/code
ports:
- "8000:8000"
links:
- db
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```
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[`docker-compose.yml` ](yml_ref.md)
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使 `docker-compose run` `Django`
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```bash
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$ docker-compose run web django-admin.py startproject django_example .
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```
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Compose 使 `Dockerfile` web 使 `django-admin.py startproject django_example`
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`Django`
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```bash
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$ ls
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Dockerfile docker-compose.yml django_example manage.py requirements.txt
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```
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Linux,
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```bash
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sudo chown -R $USER:$USER .
```
`django_example/settings.py` `DATABASES = ...`
```python
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DATABASES = {
'default': {
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'ENGINE': 'django.db.backends.postgresql',
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'NAME': 'postgres',
'USER': 'postgres',
'HOST': 'db',
'PORT': 5432,
}
}
```
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[postgres](https://hub.docker.com/_/postgres/) 镜像固定设置好的。然后,运行 `docker-compose up`
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```bash
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$ docker-compose up
django_db_1 is up-to-date
Creating django_web_1 ...
Creating django_web_1 ... done
Attaching to django_db_1, django_web_1
db_1 | The files belonging to this database system will be owned by user "postgres".
db_1 | This user must also own the server process.
db_1 |
db_1 | The database cluster will be initialized with locale "en_US.utf8".
db_1 | The default database encoding has accordingly been set to "UTF8".
db_1 | The default text search configuration will be set to "english".
web_1 | Performing system checks...
web_1 |
web_1 | System check identified no issues (0 silenced).
web_1 |
web_1 | November 23, 2017 - 06:21:19
web_1 | Django version 1.11.7, using settings 'django_example.settings'
web_1 | Starting development server at http://0.0.0.0:8000/
web_1 | Quit the server with CONTROL-C.
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```
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`Django` Docker `8000` `127.0.0.1:8000` `Django`
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Docker `docker-compose up`
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```bash
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$ docker-compose run web python manage.py syncdb
```