Skip to content

Latest commit

 

History

History
128 lines (90 loc) · 4.19 KB

README-dev.md

File metadata and controls

128 lines (90 loc) · 4.19 KB
Raw

Developer Documentation

This document needs review and updating!

This document describes how to set up this project in developer mode so that you can extend / debug the project using the same environment as will be deployed in production. Please see deployment/README.md for specific details on how to deploy into a production environment.

Application architecture under docker

The following diagram provides and overview of the core architecture components (Database, uwsgi server, web server):

dockerdjangoarchitecture - new page 1

The blue box is there to provide a means to develop on the same environment as you deploy and would not be relevant for server side deployments. Everything is managed using docker containers, with pycharm making ssh connections into the developer container and using the python interpreter found therein.

Note: You don't need to use this architecture, you can deploy as a standard django app using virtualenv and locally installed postgis, nginx etc.

Setup pycharm to work with a remove docker development environment

The setup procedure relies on docker and fig being available on your system. Please ensure you have at least docker 1.4.1 and fig 1.0.1 available.

We use a makefile so that it is not neccessary to remember tedious fig command syntax (we use separated fig files for production, staging and development deployments).

Build your dev docker image

This image extends the production one, adding ssh to it. You must have built the production one first!

cd deployment
make devbuild

Run the dev container

We provide a script to start the container:

cd deployment
make dev

Create a remote interpreter in pycharm

Open the project in pycharm then do:

  • File -> Settings
  • Project Interpreter
  • Click on the gear icon next to project interpreter
  • Add remote...

Now use these credentials:

  • SSH Credentials (tick)
  • Host: localhost
  • Port: (use the ssh port specified in the fig-dev.yml file)
  • User name: docker
  • Auth type: password (and tick 'save password')
  • Password: docker
  • Python interpreter path: /usr/bin/python

When prompted about host authenticity, click Yes

In settings, django support:

  • tick to enable django support.
  • Set django project root to the path on your host that holds django code e.g. <path to code base>/django_project
  • Set the settings option to your setting profile e.g. core/settings/dev_docker.py
  • manage script (leave default)

Create the django run configuration

  • Run -> Edit configurations
  • Click the green + icon in the top left corner
  • Choose Django server from the popup list

Now set these options:

  • Name: Django Server
  • Host: 0.0.0.0
  • Port: (use the http port specified in the fig-dev.yml file)
  • Additional options: --settings=core.settings.dev_docker
  • Environment vars: Leave as default unless you need to add something to the env
  • Python interpreter: Ensure it is set you your remote interpreter (should be set to that by default)
  • Interpreter options: Leave blank
  • Path mappings: Here you need to indicate path equivalency between your host filesystem and the filesystem in the remote (docker) host. Click the ellipsis and add a run that points to your git checkout on your local host and the /home/web directory in the docker host. e.g.
    • Local path:
    • Remote path: /home/web
  • click OK to save your run configuration

Now you can run the server using the green triangle next to the Django server label in the run configurations pull down. Debug will also work and you will be able to step through views etc as you work.

Developer FAQ

Q: I get ImportError: Could not import settings core.settings.dev_docker when starting the server.

A: django_project/core/settings/secret.py is either corrupt or you don't have permissions to read it as the user you are running runserver`` as. A common cause of this is if you are running the server in both production mode and developer mode on the same host. Simply remove the file or change ownership permissions so that you can read/write it.