Interesting IT Concepts

0. Containers!
1. CI/CD and Github Actions
2. How to Code on the go
3. More: Microservices, WebHooks, API Calls…

Containers

I love to use containers for SelfHosting

echo "Updating system and installing required packages..." && \
sudo apt-get update && \
sudo apt-get upgrade -y && \
echo "Downloading Docker installation script..." && \
sudo curl -fsSL https://get.docker.com -o get-docker.sh && \
sudo sh get-docker.sh && \
echo "Docker installed successfully. Checking Docker version..." && \
sudo docker version && \
echo "Testing Docker installation with 'hello-world' image..." && \
sudo docker run hello-world && \
echo "Installing Docker Compose..." && \
sudo apt install docker-compose -y && \
echo "Docker Compose installed successfully. Checking version..." && \
sudo docker-compose --version && \
echo "Checking status of Docker service..." && \
sudo systemctl status docker | grep "Active" && \
sudo docker run -d -p 8000:8000 -p 9000:9000 --name=portainer --restart=always -v /var/run/docker.sock:/var/run/docker.sock -v portainer_data:/data portainer/portainer-ce

echo "Updating system and installing required packages..." && \
sudo apt-get update && \
sudo apt-get upgrade -y && \
echo "Installing Podman..." && \
sudo apt-get -y install podman && \
echo "Podman installed successfully. Checking Podman version..." && \
podman --version && \
echo "Testing Podman installation with 'hello-world' image..." && \
sudo podman run hello-world && \
echo "Installing Podman Compose..." && \
sudo apt-get -y install podman-compose && \
echo "Podman Compose installed successfully. Checking version..." && \
podman-compose --version && \
echo "Checking status of Podman service..." && \
sudo systemctl status podman | grep "Active" && \
sudo podman run -d -p 8000:8000 -p 9000:9000 --name=portainer --restart=always -v /var/run/podman/podman.sock:/var/run/podman/podman.sock -v portainer_data:/data portainer/portainer-ce

What it is CI/CD?

How to use Github Actions CI/CD?

GitHub Actions, a CI/CD framework provided by GitHub, allows you to automate the build, test, and deployment processes for your software projects.

This is how I’ve used GH Actions in my projects:

GitHub Workflows enable automatic Docker container creation given conditions (like a new push). To start, go to your repository, click on Actions, and then New workflow.

You can select a workflow template that suits your project or follow the steps below to create your own .yml file for CI/CD.

The CI/CD workflow configuration is stored in .github/workflows/ci_cd.yml:

name: CI/CD Pipeline

on:
  push:
    branches:
      - main

jobs:
  build-and-push:
    runs-on: ubuntu-latest

    steps:
    - name: Checkout repository
      uses: actions/checkout@v2

    - name: Set up Docker Buildx
      uses: docker/setup-buildx-action@v1

This setup prepares your Docker image.

Next, you can push the image to a container registry, such as GitHub Container Registry or DockerHub.

Pushing Containers to GitHub Container Registry

To push the created container to GitHub Container Registry, add the following to your workflow:

    - name: Login to GitHub Container Registry
      uses: docker/login-action@v1
      with:
        registry: ghcr.io
        username: ${{ github.actor }}
        password: ${{ secrets.CICD_TOKEN_For_This_WF }}

    - name: Build and push Docker image
      uses: docker/build-push-action@v2
      with:
        context: .
        push: true
        tags: ghcr.io/your_github_username/your_repo_name:v1.0        

You’ll need a CICD_TOKEN_For_This_WF secret so GitHub can authenticate the action.

Obtain this token from GitHub Settings under Developer Settings -> Personal Access Tokens.

Next, add this token as a repository secret under Repo Settings -> Secrets & variables -> Actions -> New repository Secret.

To make your Docker image publicly accessible, set the package visibility to public under https://github.com/yourGHuser?tab=packages and update the Visibility of the Package.

Now, anyone can pull your Docker image using:

docker pull ghcr.io/your_github_username/your_repo_name:v1.0

Testing GH Actions Workflows locally

• Check the project: https://github.com/nektos/act

Run your GitHub Actions locally 🚀

Coding on The Go

Github CodeSpaces

• https://github.com/codespaces

VSCode Through Docker

Github Authenticating

sudo apt update
sudo apt install gh #https://docs.github.com/en/get-started/getting-started-with-git/about-remote-repositories#cloning-with-https-urls
gh auth login #you can use HTTPs

• https://github.com/login/device and paste the Code the CLI will give you

Other Concepts

What are Microservices?

What are Web-Hooks?

A webhook is like a doorbell.

When certain events happen in one system (like a new post on a blog or a new commit in a repository), it automatically sends a notification to another system.

It’s a way for apps to provide other applications with real-time information.

What are API calls?

An API call is like making a phone call to a specific service. You request the information or service you need, and the system responds back. It’s a way for applications to interact and request data from each other.