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Docker Overview Docker is an open-source containerization platform that enables developers to package applications along with their dependencies into lightweight, portable containers, which can then be deployed across Linux environments. Installation Procedure Step 1: Remove Legacy Docker Versions Ubuntu may ship with older Docker packages that ...

Creating a Docker container for Nginx involves defining the container configuration and building an image. Begin by creating a Dockerfile in a new directory with the following instructions: FROM nginx:alpine # Optional: Replace default configuration with custom file COPY nginx.conf /etc/nginx/nginx.conf # Optional: Add static content to defau ...

Building a Multi-Node Docker Swarm 1. Environment Setup Server Name IP Address Role controller 10.32.161.124 Manager worker1 10.32.161.125 Worker worker2 10.32.161.126 Worker 2. Docker CE Installation Install Docker CE on ...

Having established a base CentOS 7 image, the next step is to construct middleware images. This example demonstrates building a Docker image that integrates Nginx and PHP-FPM. The project structure is as follows: docker-training/ ├── centos7/ ├── mysql/ ├── php-fpm/ │ ├── Dockerfile │ ├── nginx_default.conf │ ├── nginx_nginx.conf │ ├── ...

Docker Installation on Ubuntu This guide covers two methods for installing Docker Engine on Ubuntu systems: the automated script approach and the manual repository configuration. Method 1: Automated Installation Script The fastest way to install Docker is using the official convenience script with a mirror for better download speeds: curl -fsSL ...

Architectural Overview In conatinerization, an image functions as an immutable blueprint, analogous to a compiled class definition in object-oriented languaegs. A container represents an active, isolated runtime instance derived from that blueprint. Grasping this relationship is essential for orchestrating reproducible application environments. ...

Chart Structure and Configuration A Helm chart is a collection of files that describe a related set of Kubernetes resources. The core components include Chart.yaml, values.yaml, and template files under the templates/ directory. Chart.yaml This file defines metadata about the chart: apiVersion: v1 name: k8sapp version: 0.1.1 appVersion: "1 ...

Kubectl Deploymant Workflow The process for deploying applications using Kubectl involves several key steps: Verify cluster readiness (Minikube or kubeadm) Create Deployment configuration Apply the configuration Verify deployment status Deploying a Sample Web Application 1. Creating the Deployment Configuration A Deployment object manages app ...

Creating the Base Image This process builds an Nginx imagee from AlmaLinux:latest that automatically starts Nginx when containers launch. Setting Up Files mkdir ~/docker-nginx cd ~/docker-nginx echo 'Nginx operational' > index.html Dockerfile Configuration FROM almalinux:latest RUN yum clean all && \ yum -y install epel-release ...

Snipe-IT is an open-source application for tracking IT assets, including hardware, software licenses, and accessories. Setting Up the Docker Environment Install Docker and Docker Compose on your host system. Configuring Environment Variables Create a directory for configuration files and generate an environment file. mkdir -p /opt/snipe-it/conf ...