How To Dev

Introduction When you deploy an application to a production environment, various issues can cause it to stop working. These could be code bugs, database problems, or external service issues. Each problem requires a different solution. However, if you’re using Kubernetes to deploy your application and want it to automatically restart when an issue occurs, this article is for you. Prerequisites Before proceeding, ensure you have: A Kubernetes cluster set up. You can use Google Kubernetes Engine or set up a local Kubernetes cluster with Kind . Knowledge of Kubernetes , specifically how to create Deployments and Services . Kubernetes Probes In this article, I'll guide you through using three types of probes to check the status of your application: 1. Startup Probe    - As the name suggests, this probe runs when the application starts. It ensures the container has started successfully. Only after the Startup Probe succeeds do the Readiness and Liveness Probes execute. 2. Readin...

Introduction In the previous article, I introduced the basic concepts of Kubernetes Ingress , and how to use Ingress along with related components ( Nginx Ingress Controller and cert-manager ) to automatically issue TLS certificates when deploying HTTPS applications . In this article, I'll show you how to define rules in Ingress to route traffic to different Services based on your needs. Prepare Docker Image First, you'll need a Docker image to get started. You can either use two different Docker images or follow my next instructions to prepare a Docker image . Here's a code block to create a NodeJS server that displays a title based on an environment variable input: import express from 'express' const port = 3000 const title = 'This is NodeJS Typescript Application' const app = express () app . get ( '/' , ( _ , res ) => { res . send (( process ?. env ?. TITLE ?? title ) + '! Current time is ' + Date . now ()) ...

Introduction DevOps is a combination of development (Dev) and operations (Ops), aimed at uniting people, processes, and technology to enhance the software development lifecycle. Here are some key aspects of DevOps: Collaboration and Communication: DevOps fosters a culture where development, IT operations, quality engineering, and security teams work together seamlessly. Continuous Integration and Continuous Delivery (CI/CD): These practices automate the integration and delivery of code changes, ensuring faster and more reliable software releases. Infrastructure as Code (IaC): This approach involves managing and provisioning computing infrastructure through machine-readable scripts, rather than physical hardware configuration. Monitoring and Logging: Continuous monitoring and logging help teams to detect issues early and maintain system reliability. Automation: Automating repetitive tasks reduces errors and increases efficiency, allowing teams to focus on more strategic work. By impleme...

Introduction Kubernetes (often abbreviated as K8s ) is an open-source system designed to automate the deployment, scaling, and management of containerized applications. This page serves as a collection of articles related to Kubernetes (K8s) , including theoretical concepts and practical guides on using Kubernetes to set up essential tools for the software development process. I will continue to update this series with new articles as ideas come to mind, to ensure the series becomes more comprehensive. The articles are arranged in increasing order of difficulty to make it easier for you to follow. If you have time, it's recommended that you start from the beginning of the series to acquire the necessary knowledge and information that will prepare you for the subsequent articles. Key Topics Covered in This Series Basic Knowledge : Fundamental concepts, common commands, etc. Resources : Pod, Deployment, Service, StatefulSet, Ingress, etc. Pod Autoscaler : Horizontal and Vertical sc...

Introduction Docker is an open platform for developing, shipping, and running applications. This page is dedicated to compiling articles related to Docker , covering both the theoretical aspects and practical applications of Docker in setting up popular tools essential for software development. I will be updating this series with more articles in the future as new ideas for topics arise. The articles are arranged in increasing order of difficulty, making it easier for you to follow along. If you have the time, I recommend starting from the beginning of the series to ensure that you grasp the necessary knowledge and information needed for the more advanced articles later on. Here are some key topics in the series that you need to explore to effectively use Docker : Basic knowledge Docker commands Docker Compose Building Docker images Performance improvement Integration with CI/CD Once you have a solid understanding of the foundational knowledge, the extended topics (including advanced...

Introduction Gitlab is a comprehensive platform designed for software development and version control using git. It provides a user-friendly web interface that enhances the speed of working with git, making it easier to manage Git repositories. Gitlab  offers a range of features including: Free public and private repositories: You can host your code securely and privately or share it with the world. Continuous Integration/Continuous Deployment (CI/CD) : Automate the testing and deployment of your code. Free private docker image storage on Container Registry In this article, I'll guide you on how to push a Docker image to the Gitlab Container Registry and set up CI to automatically build and push Docker images when you push code to a Gitlab repository. Pushing a Docker Image to the Gitlab Container Registry First, you'll need a Gitlab account and a repository (either public or private will work). Use the NodeJS Typescript Server project I introduced earlier , or any proj...

Introduction Continuous Integration (CI) : This is the process of building, testing, and performing necessary actions to ensure code quality before it gets merged into the main branch for deployment. Continuous Delivery (CD) : This usually happens after CI and includes steps to deploy the source code to various environments like staging and production . This guide will show you how to set up CI/CD on Github using Google Cloud Build . While Github provides shared runners, if you or your organization have many jobs that need executing during development, setting up your own runner is a better choice. Before proceeding, you should understand some basics about Google Cloud Run to build and deploy Docker images. You can refer to this article for more details: Build Docker image for NodeJS Typescript Server . Setting Up GitHub CI/CD First, create a Github repository. You can choose either a public or private repository. You can use a NodeJS TypeScript application, following my guide o...

Introduction Google Cloud Run (GCR) makes deploying a Docker image as easy as running it locally. GCR also includes customizable configuration options for managing services, simplifying the deployment process significantly. Build Docker Image The key step in deploying with a Docker image is successfully building that image. In this guide, we’ll use a NodeJS server Docker image created in this article . Follow the steps to build your Docker image (or use an existing one), and push it to Google Artifact Registry before proceeding. Deploy Docker Image To deploy a Docker image using Google Cloud Run , simply use the following command: gcloud run deploy express-ts --image {docker image} --port {port container} --region {region id} --max-instances {number of instance} --allow-unauthenticated --image : is the link to the Docker image on Google Artifact Registry or Docker Hub --port : is the container port you are exposing --max-instances : is the number of instances...