Knowledgebase

Docker has revolutionized the way applications are developed, shipped, and deployed by using containerization. Containers encapsulate everything an application needs to run, making deployment faster, more reliable, and consistent across environments. In this guide, we’ll walk you through the process of installing and configuring Docker on your VPS, along with some best practices for managing containers.

1. What is Docker? Understanding the Basics

Docker is a platform that enables developers to package applications and their dependencies into containers. This ensures that applications run seamlessly on any environment, whether it’s development, testing, or production.

• Benefits of Docker: Consistent environments, scalability, efficient resource use, and simplified application management.
• Why Use Docker on a VPS? Running Docker on a VPS allows you to easily deploy and manage multiple applications without worrying about conflicting dependencies.

2. Prerequisites: Preparing Your VPS for Docker Installation

Before installing Docker, ensure your VPS meets the following requirements:

• Supported OS: Docker supports major Linux distributions like Ubuntu, CentOS, and Debian.
• Root or Sudo Access: You’ll need administrative privileges to install Docker.
• Updated System: Update your VPS with sudo apt update && sudo apt upgrade on Ubuntu or similar commands on other Linux distributions.

3. Step 1: Installing Docker on Your VPS

Follow these steps to install Docker on your server:

• Install Required Packages: Start by installing required packages that allow apt to use packages over HTTPS:

  sudo apt install apt-transport-https ca-certificates curl software-properties-common

• Add Docker’s Official GPG Key: Add Docker’s GPG key to verify package signatures:

  curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -

• Add Docker Repository: Add the Docker repository to APT sources:

  sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"

• Install Docker: Update the package index and install Docker:

  sudo apt update sudo apt install docker-ce

• Verify Installation: Check if Docker is running correctly:

  sudo systemctl status docker

4. Step 2: Configuring Docker for Optimal Performance

Configuring Docker to suit your needs is essential for getting the most out of it.

• Set Up User Permissions: Add your user to the Docker group to run Docker commands without sudo:

  sudo user