task-manager-in-docker

Discover Task Manager in Docker! 🐳 Embrace the power of multistage builds to shrink image sizes and optimize resource utilization. Join us on a journey of streamlined deployment, enhanced efficiency, and seamless scalability. Let's revolutionize DevOps together! 💼✨ #MultistageBuilds #Containerization #Efficiency

CI/CD: GitHub Actions -> Docker Hub -> EC2

This repository now includes a workflow at .github/workflows/deploy-ec2.yml.

It does the following on every push to main:

1. Builds the Docker image.
2. Pushes the image to Docker Hub with the latest tag.
3. Connects to your EC2 instance over SSH.
4. Pulls the latest image, starts a candidate container on a temporary port, checks health, then replaces the old container.

Required GitHub Secrets

Add these in your GitHub repository under Settings -> Secrets and variables -> Actions:

• DOCKERHUB_USERNAME: your Docker Hub username.
• DOCKERHUB_TOKEN: Docker Hub access token (not password).
• DOCKER_IMAGE_NAME: full Docker Hub image name, for example yourname/task-manager.
• EC2_HOST: public IP or DNS of the EC2 instance.
• EC2_USER: SSH user (for Ubuntu AMI usually ubuntu).
• EC2_SSH_KEY: private key content (.pem) used by GitHub Actions to SSH.
• APP_NAME: deployment name, for example task-manager.
• HOST_PORT: host port to publish (optional for this CLI app).
• APP_PORT: container port to publish (optional for this CLI app).
• TEMP_PORT: temporary host port used while the new container is checked.
• HEALTHCHECK_PATH: HTTP path used to verify the new container, for example /health.

Notes About This Project

This app is currently a CLI program (interactive stdin) and not an HTTP web server.

• If you are only running it as a background container, keep HOST_PORT, APP_PORT, TEMP_PORT, and HEALTHCHECK_PATH empty.
• If you later convert it into an API/web service, set APP_PORT, TEMP_PORT, and HEALTHCHECK_PATH (for example 8080, 8081, and /health).

EC2 One-Time Checks

Run these once on EC2:

sudo systemctl enable docker
sudo systemctl start docker
sudo usermod -aG docker "$USER"

Then reconnect to the server so group changes apply.