docker.md

Using Docker for local development

You can use Docker to have a local Consul Democracy installation for development if:

• You're having troubles having prerequisites installed.
• You want to do a quick local installation just to try Consul Democracy or make a demo.
• You prefer not to interfere with other rails installations.

Prerequisites

You should have installed Docker and Docker Compose in your machine:

macOS

You can follow the official docker install

Or if you have homebrew and cask installed you can just:

brew install docker
brew install docker-compose
brew cask install docker
open -a docker

You'll be asked to give Docker app permissions and type your password, then you're set.

Linux

1. Install Docker:

sudo apt-get update
sudo apt-key adv --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys 58118E89F3A912897C070ADBF76221572C52609D
sudo apt-add-repository 'deb https://apt.dockerproject.org/repo ubuntu-xenial main'
sudo apt-get update
apt-cache policy docker-engine
sudo apt-get install -y docker-engine

2. Install Docker Compose

sudo curl -o /usr/local/bin/docker-compose -L "https://github.com/docker/compose/releases/download/1.15.0/docker-compose-$(uname -s)-$(uname -m)"
sudo chmod +x /usr/local/bin/docker-compose

Windows

Go to the [https://www.docker.com/get-started](Get Started with Docker) page. Under Docker Desktop, select Download for Windows with default options checked, and run. Should take about 5 minutes.

If you encounter the "WSL 2 installation incomplete" error:

1. Start PowerShell as Administrator
2. Run dism.exe /online /enable-feature /featurename:Microsoft-Windows-Subsystem-Linux /all /norestart
3. Run dism.exe /online /enable-feature /featurename:VirtualMachinePlatform /all /norestart
4. Install WSL2 Linux kernel update package for x64 machines
5. Run wsl --set-default-version 2
6. Restart your PC
7. The Docker Enginer will start up. Give it a few minutes. You now have the option of using the docker desktop app (GUI) and docker PowerShell/Bash commands

Installation

Clone the repo on your computer and enter the folder:

git clone https://github.com/consuldemocracy/consuldemocracy.git
cd consuldemocracy

macOS & Linux

Then lets create our secrets and database config files based on examples:

cp config/secrets.yml.example config/secrets.yml
cp config/database-docker.yml.example config/database.yml

Then you'll have to build the container with:

POSTGRES_PASSWORD=password docker-compose build

Start the database service:

POSTGRES_PASSWORD=password docker-compose up -d database

You can now initialize your development DB and populate it with:

POSTGRES_PASSWORD=password docker-compose run app rake db:create db:migrate
POSTGRES_PASSWORD=password docker-compose run app rake db:dev_seed

Windows

Pending to be completed... Contributions Welcome!

Running local Consul Democracy with Docker

macOS & Linux

Now we can finally run the application with:

POSTGRES_PASSWORD=password docker-compose up

And you'll be able to access it at your browser visiting http://localhost:3000

Additionally, if you want to run the rails console just run in another terminal:

POSTGRES_PASSWORD=password docker-compose run app rails console

To verify the containers are up execute:

docker ps .

You should see output similar to this:

Windows

Pending to be completed... Contributions Welcome!

Having trouble?

Run these commands at Consul Democracy's directory, to erase all your previous Consul Democracy's Docker images and containers. Then restart the Docker installation process:

1. Remove all Consul Democracy images:

docker-compose down --rmi all -v --remove-orphans

2. Remove all Consul Democracy containers

docker-compose rm -f -s -v

3. Verify if there is some container yet:

docker ps -a

Case positive, remove each one manually:

docker container rm <container_id>