Skip to main content

Posts

🔧 Fixing “Permission Denied While Trying to Connect to the Docker Daemon Socket” in Jenkins

🔧 Fixing “Permission Denied While Trying to Connect to the Docker Daemon Socket” in Jenkins Running Jenkins builds that involve Docker can sometimes lead to frustrating errors. One such common error is: permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock If you’ve stumbled upon this error during a Jenkins pipeline or freestyle job, don’t worry — you’re not alone. In this article, we’ll break down what this error means, why it happens, and how to fix it the right way. 🧠 What Does the Error Mean? When Jenkins tries to run a Docker command (like docker build , docker run , or docker rm ), it needs to communicate with the Docker daemon . On Linux systems, Docker exposes a special Unix socket file: /var/run/docker.sock This socket file controls access to Docker. Only users with permission to this file (typically, members of the docker group) can interact with Docker. So, if Jenkins shows this error: permission denied while tryi...
Post a Comment
Read more
Recent posts

How to Install Jenkins on Ubuntu (Step-by-Step Guide)

How to Install Jenkins on Ubuntu (Step-by-Step Guide) If you're a developer or DevOps engineer, Jenkins is one of the most powerful tools you can have in your CI/CD pipeline. In this guide, we’ll walk through how to install Jenkins on an Ubuntu system from scratch — including the setup of Java , system services , and how to access the Jenkins dashboard. 📋 Prerequisites Before diving in, make sure: You're running Ubuntu 22.04 LTS or similar You have sudo privileges Your system has access to the internet ☕ Step 1: Install Java Jenkins requires Java 17 or newer. Here’s how to install OpenJDK 17: sudo apt update sudo apt install fontconfig openjdk-21-jre You can verify the installation: java -version openjdk version "21.0.3" 2024-04-16 OpenJDK Runtime Environment ( build 21.0.3+11-Debian-2 ) OpenJDK 64-Bit Server VM ( build 21.0.3+11-Debian-2, mixed mode, sharing ) 📦 Step 2: Add Jenkins Repository Jenkins isn’t in Ubuntu’s default repos, ...
Post a Comment
Read more

Deploying a Custom HTTPD Application in Minikube: Step-by-Step Guide

Welcome to another hands-on tutorial! Today, we’re deploying a custom HTTPD application in a Kubernetes cluster using Minikube. Follow along as we walk through each step, from setting up prerequisites to deploying, scaling, and cleaning up our application. By the end, you’ll have an in-depth understanding of deploying Docker applications in Minikube with Kubernetes. Prerequisites: Setting Up Your Environment Before we start, make sure you have these tools installed and configured on your local machine: Docker (to build and run container images) kubectl (to manage Kubernetes clusters) Minikube (to run a Kubernetes cluster locally) To verify each tool, use the following commands: docker --version kubectl version --client minikube version Step 1: Run Docker Without Sudo For convenience, we’ll configure Docker to run without sudo : sudo usermod -aG docker $USER newgrp docker After running these commands, log out and back in or use newgrp docker to apply the changes. Step 2: Start the M...
Post a Comment
Read more

Setting Up Minikube and Kubectl on Ubuntu Using Docker: A Step-by-Step Guide to Deploy custom httpd image on Kubernets

Kubernetes is a powerful platform for managing containerized applications, and Minikube provides an easy way to run Kubernetes locally. In this article, we'll walk through the installation of Minikube and `kubectl` on Ubuntu using Docker as the driver. We’ll also demonstrate how to deploy a custom HTTPD application with your own index file. Prerequisites Before diving in, make sure you have: - A system running Ubuntu. - A stable internet connection. - Administrative access to install packages. Step 1: Install Docker Minikube requires a hypervisor to run Kubernetes clusters, and Docker is a popular choice. Here’s how to install Docker on Ubuntu. 1. Update the package index:    sudo apt update 2. Install prerequisites:    sudo apt install -y apt-transport-https ca-certificates curl software-properties-common 3. Add Docker’s official GPG key:    curl -fsSL https://download.docker.com/ linux/ubuntu/gpg | sudo apt-key add - 4.Add Docker’s stable repository: ...
Post a Comment
Read more

Deploying a Custom HTTPD Image with Your Own Web Content Using Jenkins Github Webhooks

In this article, we’ll guide you through deploying a custom HTTPD (Apache) Docker image containing your own web content using a Jenkins Freestyle project. This setup allows for easy automation and deployment every time you update your web content in a GitHub repository. Prerequisites Before we begin, ensure you have: - A GitHub account and a repository for your web content. - Jenkins installed and running. - Docker installed on your Jenkins server. - Basic knowledge of Docker and Jenkins. Step 1: Prepare Your Web Content 1. Create Your Web Content:    - On your local machine, create a directory for your web content.    - Inside this directory, create an `index.html` file or any additional files you want to serve.    <!DOCTYPE html>    <html lang="en">    <head>        <meta charset="UTF-8">        <meta name="viewport" content="width=device-width, init...
Post a Comment
Read more

Setting Up a Custom HTTPD Server on Kubernetes with Minikube on Ubuntu

In this article, we’ll walk through the steps to set up a Kubernetes cluster on Ubuntu using Minikube and deploy a custom Apache HTTP server (`httpd`) with your own `index.html` file. Whether you’re a beginner or just looking to refresh your skills, this guide will help you get started with Kubernetes and Docker. What You’ll Need - An Ubuntu system - Basic knowledge of the command line - Installed tools: `curl`, `apt-transport-https`, `virtualbox` (or another virtualization tool) Step 1: Prepare Your Environment First, let’s ensure your system is up-to-date and has the necessary packages. sudo apt update sudo apt upgrade -y sudo apt install -y curl apt-transport-https virtualbox Step 2: Install Minikube Minikube is a tool that makes it easy to run Kubernetes locally. Here’s how to install it: 1. Download the Minikube binary:    curl -LO https://storage.googleapis.com/minikube/releases/latest/minikube-linux-amd64 2. Install Minikube:    sudo install minikube-linux-amd...
Post a Comment
Read more

Docker Volumes

Docker Volumes are a key feature that allow you to persist data generated by and used by Docker containers. Volumes are stored on the host filesystem outside the container's filesystem, so they are not deleted when the container is removed, making them ideal for persisting data like database files, logs, and configuration files. Example: Using Docker Volumes 1. Creating a Simple Container with a Volume Let's create a simple Docker container using the official nginx image and attach a volume to persist data. docker run -d --name my-nginx -v /mydata:/usr/share/nginx/html:ro -p 8080:80 nginx Explanation: -d : Runs the container in detached mode (in the background). --name my-nginx : Names the container my-nginx . -v /mydata:/usr/share/nginx/html:ro : Creates a volume that maps the host directory /mydata to the container directory /usr/share/nginx/html . The :ro option makes this volume read-only inside the container. -p 8080:80 : Maps port 8080 on the host to port 80 in the con...
Post a Comment
Read more