Docker network

Composes Docker containers behind an Nginx reverse proxy backed by auto-renewing TLS certificates provided by Certbot.

Components

Nginx reverse proxy backed by Certbot

TLS certificate configuration via Certbot should only be done on the actual AWS EC2 virtual machine to support HTTPS. All local development and testing should be done via simple HTTP. Certificates and keys are saved in the gitignored data/certbot/ directory. See here for further information.

Nginx website beale.ga

The primary web app provided behind the Nginx reverse proxy is the beale.ga website. The entire beale/html/ directory is passed to a Docker volume, so any new files can be placed there with no further configuration necessary. DNS management can be handled by logging into the admin Google account on freenom.com.

GitHub Actions

Linting is done automatically whenever a pull request is opened or updated. When a pull request to main is accepted, the Docker images are built and pushed to and ghcr.io.

Jenkins

Another web app provided behind the Nginx reverse proxy is a Jenkins server gated behind an admin username and password: jenkins.beale.ga. This Jenkins instance is not currently being actively used, but it is up and available.

All configuration changes made through the Jenkins web app will be saved in the gitignored data/jenkins/ directory. For example, when you first run Jenkins, you should create an admin user and restrict access to logged-in users for future sessions.

AWS EC2 server

EC2 US East virtual machine: Ubuntu 20.04.1 LTS
EC2 security group allowing inbound ports 22, 80, and 443
IAM role: ec2-admin
Elastic IP address

Developer's guide

Building beale.ga

Install both Docker and Docker Compose. Follow the relevant procedures for your machine and operating system.
Ensure Docker is up and running. Consider having Docker autostart on your local machine's turn, e.g. for Linux sudo systemctl enable docker.
Clone this repository: git clone https://github.com/jftung/docker-network.git
Change to the beale directory and bring up the server:
```
cd beale
sudo docker-compose up &
```
Connect to http://localhost:8080 and test your changes
Bring down the server:
```
sudo docker-compose down
```

Linting

Install Prettier and ESLint (only necessary the first time):

    npm install

Run linters:

    ./lint.sh

You can safely ignore any Prettier errors about "No supported files were found in the directory." These linters are automatically run whenever a pull request is opened or updated.

As a historical appendix, the npm package.json, package-lock.json, and .eslintrc.json files were originally generated via:

    npm init
    npm install eslint --save-dev
    npm install prettier --save-dev
    ./node_modules/.bin/eslint --init

Deployment

This section is only relevant for admins of the beale.ga and jenkins.beale.ga websites.

First time setup

Docker installation

Install both Docker and Docker Compose. Follow the relevant procedures for your machine and operating system.

Ensure Docker is up and running. Enable autostart on the AWS EC2 machine turn, i.e. sudo systemctl enable docker.

Repository setup

Create an encrypted secret CR_PAT for this repository
Clone this repository: git clone https://github.com/jftung/docker-network.git
Export the container personal access token environment variable on the AWS EC2 machine:
```
export CR_PAT="admin_personal_access_token"
```

Export the container personal access token environment variable:

echo $CR_PAT | sudo docker login ghcr.io -u jftung --password-stdin
sudo docker pull ghcr.io/jftung/nginx-reverse-proxy
sudo docker pull ghcr.io/jftung/certbot-beale
sudo docker pull ghcr.io/jftung/nginx-beale
sudo docker pull ghcr.io/jftung/jenkins-host

Run the Let's Encrypt / Certbot init script:
```
sudo ./certbot/init-letsencrypt.sh
```
Restart the server. This server will automatically restart whenever it is brought down (including when the machine turns) unless you explicitly stop it via commands like sudo docker-compose down or sudo docker stop <container name>
```
sudo docker-compose restart &
```

Subsequent deployments

When a pull request to main is accepted, the Docker images are automatically built and pushed to and ghcr.io. From there, a script on the AWS EC2 machine controls the actual deployment and bouncing of the docker containers.

Always run:

    ./deploy.sh

Only run if updates were made to any of the following files:

docker-compose.yml
nginx/beale/Dockerfile
nginx/beale/nginx.conf
nginx/reverse-proxy/Dockerfile
nginx/reverse-proxy/nginx.conf
certbot/Dockerfile
jenkins/Dockerfile
.github/workflows/deploy.yml
```
  sudo docker-compose restart &
```

jftung/docker-network

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