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113 lines
4.1 KiB
ReStructuredText
113 lines
4.1 KiB
ReStructuredText
Deployment with Docker
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=================================================
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.. index:: Docker, deployment
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TODO: Review and revise
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**Warning**
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Docker is evolving extremely fast, but it has still some rough edges here and there. Compose is currently (as of version 1.4)
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not considered production ready. That means you won't be able to scale to multiple servers and you won't be able to run
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zero downtime deployments out of the box. Consider all this as experimental until you understand all the implications
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to run docker (with compose) on production.
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**Run your app with docker-compose**
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Prerequisites:
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* docker (at least 1.10)
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* docker-compose (at least 1.6)
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Before you start, check out the `docker-compose.yml` file in the root of this project. This is where each component
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of this application gets its configuration from. It consists of a `postgres` service that runs the database, `redis`
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for caching, `nginx` as reverse proxy and last but not least the `django` application run by gunicorn.
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{% if cookiecutter.use_celery == 'y' -%}
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Since this application also runs Celery, there are two more services with a service called `celeryworker` that runs the
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celery worker process and `celerybeat` that runs the celery beat process.
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{% endif %}
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All of these services except `redis` rely on environment variables set by you. There is an `env.example` file in the
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root directory of this project as a starting point. Add your own variables to the file and rename it to `.env`. This
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file won't be tracked by git by default so you'll have to make sure to use some other mechanism to copy your secret if
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you are relying solely on git.
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By default, the application is configured to listen on all interfaces on port 80. If you want to change that, open the
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`docker-compose.yml` file and replace `0.0.0.0` with your own ip. If you are using `nginx-proxy`_ to run multiple
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application stacks on one host, remove the port setting entirely and add `VIRTUAL_HOST={{cookiecutter.domain_name}}` to your env file.
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This pass all incoming requests on `nginx-proxy`_ to the nginx service your application is using.
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.. _nginx-proxy: https://github.com/jwilder/nginx-proxy
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Postgres is saving its database files to the `postgres_data` volume by default. Change that if you wan't
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something else and make sure to make backups since this is not done automatically.
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To get started, pull your code from source control (don't forget the `.env` file) and change to your projects root
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directory.
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You'll need to build the stack first. To do that, run::
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docker-compose build
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Once this is ready, you can run it with::
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docker-compose up
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To run a migration, open up a second terminal and run::
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docker-compose run django python manage.py migrate
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To create a superuser, run::
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docker-compose run django python manage.py createsuperuser
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If you need a shell, run::
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docker-compose run django python manage.py shell
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To get an output of all running containers.
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To check your logs, run::
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docker-compose logs
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If you want to scale your application, run::
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docker-compose scale django=4
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docker-compose scale celeryworker=2
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**Don't run the scale command on postgres or celerybeat**
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Once you are ready with your initial setup, you wan't to make sure that your application is run by a process manager to
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survive reboots and auto restarts in case of an error. You can use the process manager you are most familiar with. All
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it needs to do is to run `docker-compose up` in your projects root directory.
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If you are using `supervisor`, you can use this file as a starting point::
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[program:{{cookiecutter.project_slug}}]
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command=docker-compose up
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directory=/path/to/{{cookiecutter.project_slug}}
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redirect_stderr=true
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autostart=true
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autorestart=true
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priority=10
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Place it in `/etc/supervisor/conf.d/{{cookiecutter.project_slug}}.conf` and run::
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supervisorctl reread
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supervisorctl start {{cookiecutter.project_slug}}
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To get the status, run::
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supervisorctl status
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If you have errors, you can always check your stack with `docker-compose`. Switch to your projects root directory and run::
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docker-compose ps
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