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Docker’s layered images are great for shipping applications, but by default every change a container makes disapears when the container is removed. To keep that data around we need to look at the three official persistence mechanisms—volumes, bind mounts, and tmpfs mounts—and understand why they exist in the first place. Why the Union File Syst ...

Image Sources and Container Management Docker images can be categorized into two main types: Base System Images: Minimal operating system templates used as foundations Application Images: Pre-configured service images ready for deployment Creating base system images from templates: # Import CentOS 6 minimal template cat centos-6-x86-minimal.t ...

Overview This guide walks through deploying a SOCKS5 proxy server containerized with Docker. The setup uses the ss5 package and includes optional username/password authentication support. Project Structure Create a project directory with the following files: docker-compose.yml - Container orchestration configuration ss5.conf - Main SOCKS5 serv ...

OpenVPN is an open-source virtual private network (VPN) solution that establishes secure point-to-point or site-to-site connections using SSL/TLS. It offers three primary deployment options: OpenVPN Community Edition: A free, command-line-driven implementation requiring manual configuration of both server and client components across Linux, Wi ...

Introduction to Docker Compose Docker Compose is a tool designed for defining and running multi-container Docker applications. It uses YAML configuration files to specify services, making it suitable for various environments including production, staging, development, testing, and CI workflows. Building a Simple Application This example demonst ...

Network Infrastructure Setup To ensure the NameServer, Broker, and Console components can communicate, establish a dedicated Docker bridge network first. docker network create rocketmq-net NameServer Containerization Dockerfile for NameServer Create a file named Dockerfile.namesrv. This configuration uses OpenJDK 8 and sets up the environment ...

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 ...

Understanding Docker What is Docker? Docker is an open-source platform designed for developing, shipping, and running applications. It enables users to separate infrastructure components from applications, creating smaller granular units called containers, which accelerates software delivery speed. While Docker containers share similarities wit ...

Understanding Docker Desktop Mount Issues in VSCode Dev Containers with WSL2 This experience demonstrates why adding unnecessary complexity can create problems. Installing Docker Desktop just to run Docker commands directly and have a visual interface isn't always the best approach. WSL is your home—stay in the Linux environment. In a WSL2 + Do ...

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 ...