{"id":8275,"date":"2025-02-06T11:45:48","date_gmt":"2025-02-06T10:45:48","guid":{"rendered":"https:\/\/www.combell.com\/en\/blog\/?p=8275"},"modified":"2025-02-06T11:56:46","modified_gmt":"2025-02-06T10:56:46","slug":"what-is-docker","status":"publish","type":"post","link":"https:\/\/www.combell.com\/en\/blog\/what-is-docker\/","title":{"rendered":"What is Docker and why should you use it?"},"content":{"rendered":"<p><strong>Docker is an open-source platform that allows software developers and IT administrators to easily develop, package, and distribute applications in containers. But what exactly is a Docker container? And why do we need Docker? In this blog, we\u2019ll walk you through the key aspects of Docker and how it has fundamentally changed software development and IT management.<\/strong><\/p>\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<div class=\"wp-block-uagb-table-of-contents uagb-toc__align-left uagb-toc__columns-1  uagb-block-831c9ef3     \"\n\t\t\t\t\tdata-scroll= \"1\"\n\t\t\t\t\tdata-offset= \"30\"\n\t\t\t\t\tstyle=\"\"\n\t\t\t\t><\/p>\n<div class=\"uagb-toc__wrap\">\n<div class=\"uagb-toc__title\">\n\t\t\t\t\t\t\t<strong>Table of contents<\/strong>\t\t\t\t\t\t\t\t\t\t\t\t\t<svg xmlns=\"https:\/\/www.w3.org\/2000\/svg\" viewBox= \"0 0 384 512\"><path d=\"M192 384c-8.188 0-16.38-3.125-22.62-9.375l-160-160c-12.5-12.5-12.5-32.75 0-45.25s32.75-12.5 45.25 0L192 306.8l137.4-137.4c12.5-12.5 32.75-12.5 45.25 0s12.5 32.75 0 45.25l-160 160C208.4 380.9 200.2 384 192 384z\"><\/path><\/svg>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n<div class=\"uagb-toc__list-wrap\">\n<ol class=\"uagb-toc__list\">\n<li class=\"uagb-toc__list\"><a href=\"#what-is-a-docker-container\">What is a Docker Container?<\/a><\/li>\n<ul class=\"uagb-toc__list\">\n<li class=\"uagb-toc__list\"><a href=\"#start-immediately-with-a-pre-built-container\">Start immediately with a pre-built container<\/a><\/li>\n<li class=\"uagb-toc__list\"><a href=\"#the-benefits-of-docker\">The benefits of Docker<\/a><\/li>\n<\/li>\n<\/ul>\n<\/li>\n<li class=\"uagb-toc__list\"><a href=\"#why-do-we-need-docker\">Why do we need Docker?<\/a><\/li>\n<ul class=\"uagb-toc__list\">\n<li class=\"uagb-toc__list\"><a href=\"#treating-infrastructure-as-code\">Treating Infrastructure as code<\/a><\/li>\n<li class=\"uagb-toc__list\"><a href=\"#what-are-docker-images\">What are Docker images?<\/a><\/li>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<li class=\"uagb-toc__list\"><a href=\"#how-does-docker-work\">How does Docker work?<\/a><\/li>\n<ul class=\"uagb-toc__list\">\n<li class=\"uagb-toc__list\"><a href=\"#what-is-the-difference-between-docker-and-kubernetes\">What is the difference between Docker and Kubernetes?<\/a><\/li>\n<li class=\"uagb-toc__list\"><a href=\"#docker-compose\">Docker Compose<\/a><\/li>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<li class=\"uagb-toc__list\"><a href=\"#docker-in-practice\">Docker in practice<\/a><\/li>\n<li class=\"uagb-toc__list\"><a href=\"#getting-started-with-docker\">Getting started with Docker<\/a><\/li>\n<ul class=\"uagb-toc__list\">\n<li class=\"uagb-toc__list\"><a href=\"#what-is-docker-desktop\">What is Docker Desktop?<\/a><\/li>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<li class=\"uagb-toc__list\"><a href=\"#docker-a-solution-for-modern-software-development-challenges\">Docker: A solution for modern software development challenges<\/a><\/li>\n<li class=\"uagb-toc__list\"><a href=\"#frequently-asked-questions-about-docker\">Frequently asked questions about Docker<\/a><\/li>\n<\/ul>\n<\/ul>\n<\/ul>\n<\/ul>\n<\/ol><\/div>\n<\/p><\/div>\n<\/p><\/div>\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<h2 class=\"wp-block-heading\">What is a Docker Container?<\/h2>\n<p>A Docker container is a lightweight, standalone, executable unit that contains everything an application needs to run: from code and runtime to libraries and settings.<\/p>\n<p>Containers operate independently of the underlying operating system, which means they are extremely flexible and platform-independent.<\/p>\n<p>Containers are not only compact but also highly efficient. They use shared resources from the host operating system, resulting in significantly less overhead compared to traditional virtual machines (VMs). This makes Docker containers ideal for modern software development, where flexibility and speed are crucial.<\/p>\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"600\" src=\"https:\/\/www.combell.com\/en\/blog\/files\/docker@2x.png\" alt=\"\" class=\"wp-image-13000\" srcset=\"https:\/\/www.combell.com\/en\/blog\/files\/docker@2x.png 600w, https:\/\/www.combell.com\/en\/blog\/files\/docker@2x-300x300.png 300w, https:\/\/www.combell.com\/en\/blog\/files\/docker@2x-50x50.png 50w, https:\/\/www.combell.com\/en\/blog\/files\/docker@2x-60x60.png 60w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><figcaption class=\"wp-element-caption\">With Docker, you can install an operating system, just like with a virtual machine.<\/figcaption><\/figure>\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<h3 class=\"wp-block-heading\">Start immediately with a pre-built container<\/h3>\n<p>Unlike a virtual machine, containers share the same kernel with the host operating system, which leads to less duplication of resources.<\/p>\n<p>This means you can run multiple containers on the same machine without feeling like you\u2019re inefficiently using your hardware. One big advantage is that you can get started with a pre-built container right away, without wasting time on configuration.<\/p>\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<div class=\"wp-block-uagb-inline-notice uagb-inline_notice__align-left uagb-block-d4a7254a uagb-inline_notice__outer-wrap\">\n<p class=\"uagb-notice-title\">Tip<\/p>\n<div class=\"uagb-notice-text\">\n<p>Want to learn more about how containers can contribute to your IT strategy? Check out our <a href=\"https:\/\/www.combell.com\" target=\"_blank\" rel=\"noreferrer noopener\">Managed Container Services<\/a> and discover how Combell can help you with a fully managed platform.<\/p>\n<\/div>\n<\/div>\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<h3 class=\"wp-block-heading\">The benefits of Docker<\/h3>\n<div class=\"wp-block-uagb-icon-list uagb-block-639758fd\">\n<div class=\"uagb-icon-list__wrap\">\n<div class=\"wp-block-uagb-icon-list-child uagb-block-5fa52111\"><span class=\"uagb-icon-list__source-wrap\"><svg xmlns=\"https:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 512 512\"><path d=\"M0 256C0 114.6 114.6 0 256 0C397.4 0 512 114.6 512 256C512 397.4 397.4 512 256 512C114.6 512 0 397.4 0 256zM256 368C269.3 368 280 357.3 280 344V280H344C357.3 280 368 269.3 368 256C368 242.7 357.3 232 344 232H280V168C280 154.7 269.3 144 256 144C242.7 144 232 154.7 232 168V232H168C154.7 232 144 242.7 144 256C144 269.3 154.7 280 168 280H232V344C232 357.3 242.7 368 256 368z\"><\/path><\/svg><\/span><span class=\"uagb-icon-list__label\"><strong>Flexibility<\/strong>: Containers can be easily moved between different environments.<\/span><\/div>\n<div class=\"wp-block-uagb-icon-list-child uagb-block-ea2338b8\"><span class=\"uagb-icon-list__source-wrap\"><svg xmlns=\"https:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 512 512\"><path d=\"M0 256C0 114.6 114.6 0 256 0C397.4 0 512 114.6 512 256C512 397.4 397.4 512 256 512C114.6 512 0 397.4 0 256zM256 368C269.3 368 280 357.3 280 344V280H344C357.3 280 368 269.3 368 256C368 242.7 357.3 232 344 232H280V168C280 154.7 269.3 144 256 144C242.7 144 232 154.7 232 168V232H168C154.7 232 144 242.7 144 256C144 269.3 154.7 280 168 280H232V344C232 357.3 242.7 368 256 368z\"><\/path><\/svg><\/span><span class=\"uagb-icon-list__label\"><strong>Scalability<\/strong>: You can quickly start additional containers to meet increased demand.<\/span><\/div>\n<div class=\"wp-block-uagb-icon-list-child uagb-block-3424847a\"><span class=\"uagb-icon-list__source-wrap\"><svg xmlns=\"https:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 512 512\"><path d=\"M0 256C0 114.6 114.6 0 256 0C397.4 0 512 114.6 512 256C512 397.4 397.4 512 256 512C114.6 512 0 397.4 0 256zM256 368C269.3 368 280 357.3 280 344V280H344C357.3 280 368 269.3 368 256C368 242.7 357.3 232 344 232H280V168C280 154.7 269.3 144 256 144C242.7 144 232 154.7 232 168V232H168C154.7 232 144 242.7 144 256C144 269.3 154.7 280 168 280H232V344C232 357.3 242.7 368 256 368z\"><\/path><\/svg><\/span><span class=\"uagb-icon-list__label\"><strong>Cost Savings<\/strong>: Efficient resource utilization saves on hardware and infrastructure costs.<\/span><\/div>\n<div class=\"wp-block-uagb-icon-list-child uagb-block-e32ba987\"><span class=\"uagb-icon-list__source-wrap\"><svg xmlns=\"https:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 512 512\"><path d=\"M0 256C0 114.6 114.6 0 256 0C397.4 0 512 114.6 512 256C512 397.4 397.4 512 256 512C114.6 512 0 397.4 0 256zM256 368C269.3 368 280 357.3 280 344V280H344C357.3 280 368 269.3 368 256C368 242.7 357.3 232 344 232H280V168C280 154.7 269.3 144 256 144C242.7 144 232 154.7 232 168V232H168C154.7 232 144 242.7 144 256C144 269.3 154.7 280 168 280H232V344C232 357.3 242.7 368 256 368z\"><\/path><\/svg><\/span><span class=\"uagb-icon-list__label\"><strong>Security<\/strong>: Containers run in isolated environments, reducing the risk of security issues.<\/span><\/div>\n<div class=\"wp-block-uagb-icon-list-child uagb-block-e2e24c49\"><span class=\"uagb-icon-list__source-wrap\"><svg xmlns=\"https:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 512 512\"><path d=\"M0 256C0 114.6 114.6 0 256 0C397.4 0 512 114.6 512 256C512 397.4 397.4 512 256 512C114.6 512 0 397.4 0 256zM256 368C269.3 368 280 357.3 280 344V280H344C357.3 280 368 269.3 368 256C368 242.7 357.3 232 344 232H280V168C280 154.7 269.3 144 256 144C242.7 144 232 154.7 232 168V232H168C154.7 232 144 242.7 144 256C144 269.3 154.7 280 168 280H232V344C232 357.3 242.7 368 256 368z\"><\/path><\/svg><\/span><span class=\"uagb-icon-list__label\"><strong>Performance<\/strong>: Containers have less overhead than traditional VMs.<\/span><\/div>\n<\/div>\n<\/div>\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<div class=\"wp-block-uagb-inline-notice uagb-inline_notice__align-left uagb-block-cf64cd3b uagb-inline_notice__outer-wrap\">\n<p class=\"uagb-notice-title\">Tip<\/p>\n<div class=\"uagb-notice-text\">\n<p>Another major advantage of Docker is that it is compatible with different programming languages and frameworks. This makes it a universal solution for development teams with diverse technology stacks. In practice, companies implementing Docker can guarantee faster time-to-market for their customers\u2014a significant competitive advantage!<\/p>\n<\/div>\n<\/div>\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<h2 class=\"wp-block-heading\">Why do we need Docker?<\/h2>\n<p>In a traditional development environment, you often encounter challenges such as inconsistency between development, test and production environments.<\/p>\n<p>Resulting in <strong>lost time and errors<\/strong>. Docker offers a solution here by providing a uniform environment, regardless of where the container is running. Some key reasons why Docker is indispensable:<\/p>\n<div class=\"wp-block-uagb-icon-list uagb-block-b47cd4e4 uagb-icon-list__outer-wrap uagb-icon-list__layout-vertical uagb-icon-list__icon-at-top\">\n<div class=\"uagb-icon-list__wrap\">\n<div class=\"wp-block-uagb-icon-list-child uagb-block-7af36dfe uagb-icon-list-repeater uagb-icon-list__wrapper\"><a target=\"_self\" aria-label=\"Consistency: Ensure applications perform consistently, regardless of the environment.\" rel=\"noopener noreferrer\" href=\"#\"> <\/a><span class=\"uagb-icon-list__source-wrap\"><svg xmlns=\"https:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 512 512\"><path d=\"M256 0C114.6 0 0 114.6 0 256c0 141.4 114.6 256 256 256s256-114.6 256-256C512 114.6 397.4 0 256 0zM406.6 278.6l-103.1 103.1c-12.5 12.5-32.75 12.5-45.25 0s-12.5-32.75 0-45.25L306.8 288H128C110.3 288 96 273.7 96 256s14.31-32 32-32h178.8l-49.38-49.38c-12.5-12.5-12.5-32.75 0-45.25s32.75-12.5 45.25 0l103.1 103.1C414.6 241.3 416 251.1 416 256C416 260.9 414.6 270.7 406.6 278.6z\"><\/path><\/svg><\/span><span class=\"uagb-icon-list__label\"><strong>Consistency<\/strong>: Ensure applications perform consistently, regardless of the environment.<\/span><\/div>\n<div class=\"wp-block-uagb-icon-list-child uagb-block-13ea809d uagb-icon-list-repeater uagb-icon-list__wrapper\"><a target=\"_self\" aria-label=\"Efficient Resource Usage: Optimize hardware usage by using containers.\" rel=\"noopener noreferrer\" href=\"#\"> <\/a><span class=\"uagb-icon-list__source-wrap\"><svg xmlns=\"https:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 512 512\"><path d=\"M256 0C114.6 0 0 114.6 0 256c0 141.4 114.6 256 256 256s256-114.6 256-256C512 114.6 397.4 0 256 0zM406.6 278.6l-103.1 103.1c-12.5 12.5-32.75 12.5-45.25 0s-12.5-32.75 0-45.25L306.8 288H128C110.3 288 96 273.7 96 256s14.31-32 32-32h178.8l-49.38-49.38c-12.5-12.5-12.5-32.75 0-45.25s32.75-12.5 45.25 0l103.1 103.1C414.6 241.3 416 251.1 416 256C416 260.9 414.6 270.7 406.6 278.6z\"><\/path><\/svg><\/span><span class=\"uagb-icon-list__label\"><strong>Efficient Resource Usage<\/strong>: Optimize hardware usage by using containers.<\/span><\/div>\n<div class=\"wp-block-uagb-icon-list-child uagb-block-e08bdb5f uagb-icon-list-repeater uagb-icon-list__wrapper\"><a target=\"_self\" aria-label=\"Rapid Deployment: Easily deploy containers across multiple servers or cloud environments.\" rel=\"noopener noreferrer\" href=\"#\"> <\/a><span class=\"uagb-icon-list__source-wrap\"><svg xmlns=\"https:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 512 512\"><path d=\"M256 0C114.6 0 0 114.6 0 256c0 141.4 114.6 256 256 256s256-114.6 256-256C512 114.6 397.4 0 256 0zM406.6 278.6l-103.1 103.1c-12.5 12.5-32.75 12.5-45.25 0s-12.5-32.75 0-45.25L306.8 288H128C110.3 288 96 273.7 96 256s14.31-32 32-32h178.8l-49.38-49.38c-12.5-12.5-12.5-32.75 0-45.25s32.75-12.5 45.25 0l103.1 103.1C414.6 241.3 416 251.1 416 256C416 260.9 414.6 270.7 406.6 278.6z\"><\/path><\/svg><\/span><span class=\"uagb-icon-list__label\"><strong>Rapid Deployment<\/strong>: Easily deploy containers across multiple servers or cloud environments.<\/span><\/div>\n<div class=\"wp-block-uagb-icon-list-child uagb-block-cf613082 uagb-icon-list-repeater uagb-icon-list__wrapper\"><a target=\"_self\" aria-label=\"Version Control: Docker images allow you to easily manage different versions of your application.\" rel=\"noopener noreferrer\" href=\"#\"> <\/a><span class=\"uagb-icon-list__source-wrap\"><svg xmlns=\"https:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 512 512\"><path d=\"M256 0C114.6 0 0 114.6 0 256c0 141.4 114.6 256 256 256s256-114.6 256-256C512 114.6 397.4 0 256 0zM406.6 278.6l-103.1 103.1c-12.5 12.5-32.75 12.5-45.25 0s-12.5-32.75 0-45.25L306.8 288H128C110.3 288 96 273.7 96 256s14.31-32 32-32h178.8l-49.38-49.38c-12.5-12.5-12.5-32.75 0-45.25s32.75-12.5 45.25 0l103.1 103.1C414.6 241.3 416 251.1 416 256C416 260.9 414.6 270.7 406.6 278.6z\"><\/path><\/svg><\/span><span class=\"uagb-icon-list__label\"><strong>Version Control<\/strong>: Docker images allow you to easily manage different versions of your application.<\/span><\/div>\n<\/div>\n<\/div>\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<h3 class=\"wp-block-heading\">Treating Infrastructure as code<\/h3>\n<p>Moreover, Docker fits perfectly within the <strong>DevOps philosophy<\/strong>, which focuses on collaboration between developers and administrators. By treating infrastructure as code, you make processes repeatable and minimise human error.<\/p>\n<p>A concrete example: suppose you are developing an e-commerce application. You can create a Docker container that contains all dependencies, such as the correct version of a database and the application code. Whether you run this container locally, on a test environment or in production, the behaviour remains the same.<\/p>\n<p>Want to be completely unburdened in managing your containers? Our <a href=\"https:\/\/www.combell.com\/en\/managed-container-services\">Managed Container Services<\/a> are the ideal solution for companies looking for maximum reliability and performance.<\/p>\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"521\" src=\"https:\/\/www.combell.com\/en\/blog\/files\/docker-container-1024x521.png\" alt=\"A Docker Image can be seen as an essential component of a container.\" class=\"wp-image-13001\" srcset=\"https:\/\/www.combell.com\/en\/blog\/files\/docker-container-1024x521.png 1024w, https:\/\/www.combell.com\/en\/blog\/files\/docker-container-300x153.png 300w, https:\/\/www.combell.com\/en\/blog\/files\/docker-container-768x391.png 768w, https:\/\/www.combell.com\/en\/blog\/files\/docker-container.png 1400w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">A Docker Image can be seen as an essential component of a container.<\/figcaption><\/figure>\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<h3 class=\"wp-block-heading\">What are Docker images?<\/h3>\n<p>A Docker image is the building block of a container. It contains the source code of an application, along with the required libraries, dependencies, and configurations.<\/p>\n<p>When you build an image, you create a complete, standalone environment that remains consistent regardless of where it is executed.<\/p>\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<p>How to use a Docker image:<\/p>\n<div class=\"wp-block-uagb-icon-list uagb-block-5a3db20e uagb-icon-list__outer-wrap uagb-icon-list__layout-vertical uagb-icon-list__icon-at-top\">\n<div class=\"uagb-icon-list__wrap\">\n<div class=\"wp-block-uagb-icon-list-child uagb-block-72194202 uagb-icon-list-repeater uagb-icon-list__wrapper\"><a target=\"_self\" aria-label=\"Create an Image: By writing a Dockerfile, you define what an image looks like.\" rel=\"noopener noreferrer\" href=\"#\"> <\/a><span class=\"uagb-icon-list__source-wrap\"><svg xmlns=\"https:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 512 512\"><path d=\"M256 0C114.6 0 0 114.6 0 256c0 141.4 114.6 256 256 256s256-114.6 256-256C512 114.6 397.4 0 256 0zM406.6 278.6l-103.1 103.1c-12.5 12.5-32.75 12.5-45.25 0s-12.5-32.75 0-45.25L306.8 288H128C110.3 288 96 273.7 96 256s14.31-32 32-32h178.8l-49.38-49.38c-12.5-12.5-12.5-32.75 0-45.25s32.75-12.5 45.25 0l103.1 103.1C414.6 241.3 416 251.1 416 256C416 260.9 414.6 270.7 406.6 278.6z\"><\/path><\/svg><\/span><span class=\"uagb-icon-list__label\"><strong>Create an Image<\/strong>: By writing a Dockerfile, you define what an image looks like.<\/span><\/div>\n<div class=\"wp-block-uagb-icon-list-child uagb-block-c6ad2c56 uagb-icon-list-repeater uagb-icon-list__wrapper\"><a target=\"_self\" aria-label=\"Publish the Image: You can upload an image to Docker Hub or another container registry.\" rel=\"noopener noreferrer\" href=\"#\"> <\/a><span class=\"uagb-icon-list__source-wrap\"><svg xmlns=\"https:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 512 512\"><path d=\"M256 0C114.6 0 0 114.6 0 256c0 141.4 114.6 256 256 256s256-114.6 256-256C512 114.6 397.4 0 256 0zM406.6 278.6l-103.1 103.1c-12.5 12.5-32.75 12.5-45.25 0s-12.5-32.75 0-45.25L306.8 288H128C110.3 288 96 273.7 96 256s14.31-32 32-32h178.8l-49.38-49.38c-12.5-12.5-12.5-32.75 0-45.25s32.75-12.5 45.25 0l103.1 103.1C414.6 241.3 416 251.1 416 256C416 260.9 414.6 270.7 406.6 278.6z\"><\/path><\/svg><\/span><span class=\"uagb-icon-list__label\"><strong>Publish the Image<\/strong>: You can upload an image to Docker Hub or another container registry.<\/span><\/div>\n<div class=\"wp-block-uagb-icon-list-child uagb-block-7048ee65 uagb-icon-list-repeater uagb-icon-list__wrapper\"><a target=\"_self\" aria-label=\"Use the Image: Create containers based on your image.\" rel=\"noopener noreferrer\" href=\"#\"> <\/a><span class=\"uagb-icon-list__source-wrap\"><svg xmlns=\"https:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 512 512\"><path d=\"M256 0C114.6 0 0 114.6 0 256c0 141.4 114.6 256 256 256s256-114.6 256-256C512 114.6 397.4 0 256 0zM406.6 278.6l-103.1 103.1c-12.5 12.5-32.75 12.5-45.25 0s-12.5-32.75 0-45.25L306.8 288H128C110.3 288 96 273.7 96 256s14.31-32 32-32h178.8l-49.38-49.38c-12.5-12.5-12.5-32.75 0-45.25s32.75-12.5 45.25 0l103.1 103.1C414.6 241.3 416 251.1 416 256C416 260.9 414.6 270.7 406.6 278.6z\"><\/path><\/svg><\/span><span class=\"uagb-icon-list__label\"><strong>Use the Image<\/strong>: Create containers based on your image.<\/span><\/div>\n<\/div>\n<\/div>\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<p>A key advantage of Docker images is that they can be easily shared within teams, enabling better collaboration and speeding up development processes. Additionally, Docker images can undergo version control, which is essential for larger development projects.<\/p>\n<p>A development team can create a base image for a Node.js application. Every developer can use this image to get started immediately, without wasting time on configuration issues.<\/p>\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<h2 class=\"wp-block-heading\">How does Docker work?<\/h2>\n<p>Docker operates on a client-server architecture composed of the following four components:<\/p>\n<ol>\n<li><strong>Docker Engine<\/strong>: The core of Docker, responsible for building, running, and managing containers. The engine runs on the host machine and includes three key parts:<\/li>\n<\/ol>\n<div class=\"wp-block-uagb-icon-list uagb-block-1cbe50c3 uagb-icon-list__outer-wrap uagb-icon-list__layout-vertical uagb-icon-list__icon-at-top\">\n<div class=\"uagb-icon-list__wrap\">\n<div class=\"wp-block-uagb-icon-list-child uagb-block-8917b5df uagb-icon-list-repeater uagb-icon-list__wrapper\"><a target=\"_self\" aria-label=\"Docker Daemon: Executes container operations.\" rel=\"noopener noreferrer\" href=\"#\"> <\/a><span class=\"uagb-icon-list__source-wrap\"><svg xmlns=\"https:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 512 512\"><path d=\"M256 0C114.6 0 0 114.6 0 256c0 141.4 114.6 256 256 256s256-114.6 256-256C512 114.6 397.4 0 256 0zM406.6 278.6l-103.1 103.1c-12.5 12.5-32.75 12.5-45.25 0s-12.5-32.75 0-45.25L306.8 288H128C110.3 288 96 273.7 96 256s14.31-32 32-32h178.8l-49.38-49.38c-12.5-12.5-12.5-32.75 0-45.25s32.75-12.5 45.25 0l103.1 103.1C414.6 241.3 416 251.1 416 256C416 260.9 414.6 270.7 406.6 278.6z\"><\/path><\/svg><\/span><span class=\"uagb-icon-list__label\"><strong>Docker Daemon<\/strong>: Executes container operations.<\/span><\/div>\n<div class=\"wp-block-uagb-icon-list-child uagb-block-778a8827 uagb-icon-list-repeater uagb-icon-list__wrapper\"><a target=\"_self\" aria-label=\"REST API: Communicates with the Docker Daemon.\" rel=\"noopener noreferrer\" href=\"#\"> <\/a><span class=\"uagb-icon-list__source-wrap\"><svg xmlns=\"https:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 512 512\"><path d=\"M256 0C114.6 0 0 114.6 0 256c0 141.4 114.6 256 256 256s256-114.6 256-256C512 114.6 397.4 0 256 0zM406.6 278.6l-103.1 103.1c-12.5 12.5-32.75 12.5-45.25 0s-12.5-32.75 0-45.25L306.8 288H128C110.3 288 96 273.7 96 256s14.31-32 32-32h178.8l-49.38-49.38c-12.5-12.5-12.5-32.75 0-45.25s32.75-12.5 45.25 0l103.1 103.1C414.6 241.3 416 251.1 416 256C416 260.9 414.6 270.7 406.6 278.6z\"><\/path><\/svg><\/span><span class=\"uagb-icon-list__label\"><strong>REST API<\/strong>: Communicates with the Docker Daemon.<\/span><\/div>\n<div class=\"wp-block-uagb-icon-list-child uagb-block-d9aef72d uagb-icon-list-repeater uagb-icon-list__wrapper\"><a target=\"_self\" aria-label=\"Docker CLI: The command-line interface for executing Docker commands.\" rel=\"noopener noreferrer\" href=\"#\"> <\/a><span class=\"uagb-icon-list__source-wrap\"><svg xmlns=\"https:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 512 512\"><path d=\"M256 0C114.6 0 0 114.6 0 256c0 141.4 114.6 256 256 256s256-114.6 256-256C512 114.6 397.4 0 256 0zM406.6 278.6l-103.1 103.1c-12.5 12.5-32.75 12.5-45.25 0s-12.5-32.75 0-45.25L306.8 288H128C110.3 288 96 273.7 96 256s14.31-32 32-32h178.8l-49.38-49.38c-12.5-12.5-12.5-32.75 0-45.25s32.75-12.5 45.25 0l103.1 103.1C414.6 241.3 416 251.1 416 256C416 260.9 414.6 270.7 406.6 278.6z\"><\/path><\/svg><\/span><span class=\"uagb-icon-list__label\"><strong>Docker CLI<\/strong>: The command-line interface for executing Docker commands.<\/span><\/div>\n<\/div>\n<\/div>\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<p>The <strong>Docker Engine REST API<\/strong> plays a crucial role in container management. It allows you to write automated scripts that send Docker API requests to the daemon. Thanks to this API, developers can seamlessly integrate containers into existing workflows.<\/p>\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<ol start=\"2\">\n<li><strong>Docker Images<\/strong>: A Docker image is an immutable template used to create containers. Think of it as a \"snapshot\" of an application and all its dependencies.<\/li>\n<li><strong>Docker Containers<\/strong>: Containers are created from images. They are dynamic and can be easily started or stopped.<\/li>\n<li><strong>Docker Hub<\/strong>: An online repository where you can find and share Docker images. Developers can start with standard images (e.g., for Node.js or Python) and customize them to meet specific needs.<\/li>\n<\/ol>\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<p>The use of Docker has led many companies to adopt new technologies more quickly and achieve more efficient workflows.<\/p>\n<p>Additionally, Docker supports plugins and integrations with tools like Kubernetes, GitLab, and Jenkins, enhancing usability in complex CI\/CD pipelines.<\/p>\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"731\" src=\"https:\/\/www.combell.com\/en\/blog\/files\/dokker-vs-kubernetes-1024x731.png\" alt=\"What is Docker Compared to Kubernetes?\" class=\"wp-image-13002\" srcset=\"https:\/\/www.combell.com\/en\/blog\/files\/dokker-vs-kubernetes-1024x731.png 1024w, https:\/\/www.combell.com\/en\/blog\/files\/dokker-vs-kubernetes-300x214.png 300w, https:\/\/www.combell.com\/en\/blog\/files\/dokker-vs-kubernetes-768x549.png 768w, https:\/\/www.combell.com\/en\/blog\/files\/dokker-vs-kubernetes.png 1400w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">What is Docker Compared to Kubernetes?<\/figcaption><\/figure>\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<h3 class=\"wp-block-heading\">What is the difference between Docker and Kubernetes?<\/h3>\n<p>Docker and <a href=\"https:\/\/www.combell.com\/en\/managed-kubernetes\">Kubernetes<\/a> are often mentioned together, but they serve different purposes:<\/p>\n<ul>\n<li><strong>Docker<\/strong> is a platform for creating, deploying, and managing containers.<\/li>\n<li><strong>Kubernetes<\/strong> is a container orchestration platform that helps manage multiple containers at scale.<\/li>\n<\/ul>\n<p>Docker is ideal for running a single container, whereas Kubernetes is necessary when managing many containers. With Kubernetes, businesses can increase their productivity and efficiency. It also offers <strong>self-healing functionality<\/strong>, automatically restarting failed containers<\/p>\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<h3 class=\"wp-block-heading\">Docker Compose<\/h3>\n<p>Imagine you have a web application with a frontend, backend, and database. With Docker, you can create containers for each of these components, and with Docker Compose, you can easily define and <strong>manage them together in a single configuration.<\/strong><\/p>\n<p>Docker Compose allows you to start, stop, and link multiple containers at once so your application functions as a cohesive unit.<\/p>\n<p>As your application grows and gains more users, you\u2019ll need Kubernetes to automatically start additional containers, distribute peak loads, and restart stuck containers.<\/p>\n<p>However, Docker Compose remains a handy tool for developing and testing applications on a <strong>smaller scale<\/strong> before deploying them to a production environment.<\/p>\n<p>Kubernetes also offers advanced features like auto-scaling, self-healing, and <a href=\"https:\/\/www.combell.com\/en\/technology\/load-balancing\">load balancing<\/a>, making it ideal for large-scale cloud-native applications. Combell even offers an <a href=\"https:\/\/www.combell.com\/en\/managed-kubernetes\">entry-level Kubernetes model<\/a>.<\/p>\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<div class=\"wp-block-uagb-inline-notice uagb-inline_notice__align-left uagb-block-a08aaba5 uagb-inline_notice__outer-wrap\">\n<p class=\"uagb-notice-title\">Also read<\/p>\n<div class=\"uagb-notice-text\">\n<p><a href=\"https:\/\/www.combell.com\/en\/blog\/what-is-kubernetes\/\">What is Kubernetes and why is it important for your business?<\/a><\/p>\n<\/div>\n<\/div>\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<h2 class=\"wp-block-heading\">Docker in practice<\/h2>\n<p><strong>\"Where is Docker used?\"<\/strong> you may ask. Docker is applied in many areas, by both individual developers and large companies. Examples include:<\/p>\n<ol>\n<li><strong>Software Development<\/strong>: Developers use Docker to build and test applications in a consistent environment.<\/li>\n<li><strong>Continuous Integration\/Continuous Deployment (CI\/CD)<\/strong>: Docker integrates seamlessly into CI\/CD pipelines, enabling faster releases.<\/li>\n<li><strong>Cloud Environments<\/strong>: Cloud providers like AWS, Azure, and Google Cloud offer extensive support for Docker.<\/li>\n<li><strong>Microservices<\/strong>: Docker is the perfect partner for a microservices architecture, where each service runs in its container.<\/li>\n<\/ol>\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<p><strong>A real-life example<\/strong>: a large e-commerce company uses Docker to build a scalable infrastructure. With containers, they can easily test new functionalities without risk of failure in their production environment.<\/p>\n<p>In addition, Docker is increasingly used in <strong>education and research<\/strong>. Students and researchers can easily experiment with complex software configurations without the risk of (distant) failures.<\/p>\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<h2 class=\"wp-block-heading\">Getting started with Docker<\/h2>\n<p>Starting with Docker is simpler than you might think. Follow these steps:<\/p>\n<ol>\n<li><strong>Install Docker Desktop<\/strong>: Available for Windows, macOS, and Linux.<\/li>\n<li><strong>Learn the Basics<\/strong>: Begin by creating a simple Docker container.<\/li>\n<li><strong>Use Docker Hub<\/strong>: Download existing images to experiment with.<\/li>\n<li><strong>Create Your Own Images<\/strong>: Learn how to write Dockerfiles and build custom images.<\/li>\n<\/ol>\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<p>Docker offers extensive <a href=\"https:\/\/www.docker.com\/blog\/\" target=\"_blank\" rel=\"noopener\">documentation<\/a> and <a href=\"https:\/\/docs.docker.com\/guides\/\" target=\"_blank\" rel=\"noopener\">tutorials<\/a> to help beginners get started quickly. Additionally, online communities are available for support.<\/p>\n<p>A great starting point is running a simple web server in a container. This helps you learn the basics of Docker, such as starting and stopping containers.<\/p>\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"600\" src=\"https:\/\/www.combell.com\/en\/blog\/files\/docker-desktop@2x.png\" alt=\"Docker Desktop is ideal for beginners.\" class=\"wp-image-13003\" srcset=\"https:\/\/www.combell.com\/en\/blog\/files\/docker-desktop@2x.png 600w, https:\/\/www.combell.com\/en\/blog\/files\/docker-desktop@2x-300x300.png 300w, https:\/\/www.combell.com\/en\/blog\/files\/docker-desktop@2x-50x50.png 50w, https:\/\/www.combell.com\/en\/blog\/files\/docker-desktop@2x-60x60.png 60w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><figcaption class=\"wp-element-caption\">Docker Desktop is ideal for beginners.<\/figcaption><\/figure>\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<h3 class=\"wp-block-heading\">What is Docker Desktop?<\/h3>\n<p>Docker Desktop is an <strong>all-in-one solution<\/strong> for developers to easily run Docker locally. It provides a user-friendly interface for managing containers, images, and settings, making it ideal for beginners.<\/p>\n<p>With Docker Desktop, you can manage containers locally without needing a full operating system for each container, significantly improving efficiency.<\/p>\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<p><strong>Using Docker Desktop, you can:<\/strong><\/p>\n<div class=\"wp-block-uagb-icon-list uagb-block-54de7cc7 uagb-icon-list__outer-wrap uagb-icon-list__layout-vertical uagb-icon-list__icon-at-top\">\n<div class=\"uagb-icon-list__wrap\">\n<div class=\"wp-block-uagb-icon-list-child uagb-block-bc7226e6 uagb-icon-list-repeater uagb-icon-list__wrapper\"><a target=\"_self\" aria-label=\"Start or stop new containers.\" rel=\"noopener noreferrer\" href=\"#\"> <\/a><span class=\"uagb-icon-list__source-wrap\"><svg xmlns=\"https:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 512 512\"><path d=\"M256 0C114.6 0 0 114.6 0 256c0 141.4 114.6 256 256 256s256-114.6 256-256C512 114.6 397.4 0 256 0zM406.6 278.6l-103.1 103.1c-12.5 12.5-32.75 12.5-45.25 0s-12.5-32.75 0-45.25L306.8 288H128C110.3 288 96 273.7 96 256s14.31-32 32-32h178.8l-49.38-49.38c-12.5-12.5-12.5-32.75 0-45.25s32.75-12.5 45.25 0l103.1 103.1C414.6 241.3 416 251.1 416 256C416 260.9 414.6 270.7 406.6 278.6z\"><\/path><\/svg><\/span><span class=\"uagb-icon-list__label\">Start or stop new containers.<\/span><\/div>\n<div class=\"wp-block-uagb-icon-list-child uagb-block-5e79e9d6 uagb-icon-list-repeater uagb-icon-list__wrapper\"><a target=\"_self\" aria-label=\"Manage and customize Dockerfiles.\" rel=\"noopener noreferrer\" href=\"#\"> <\/a><span class=\"uagb-icon-list__source-wrap\"><svg xmlns=\"https:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 512 512\"><path d=\"M256 0C114.6 0 0 114.6 0 256c0 141.4 114.6 256 256 256s256-114.6 256-256C512 114.6 397.4 0 256 0zM406.6 278.6l-103.1 103.1c-12.5 12.5-32.75 12.5-45.25 0s-12.5-32.75 0-45.25L306.8 288H128C110.3 288 96 273.7 96 256s14.31-32 32-32h178.8l-49.38-49.38c-12.5-12.5-12.5-32.75 0-45.25s32.75-12.5 45.25 0l103.1 103.1C414.6 241.3 416 251.1 416 256C416 260.9 414.6 270.7 406.6 278.6z\"><\/path><\/svg><\/span><span class=\"uagb-icon-list__label\">Manage and customize Dockerfiles.<\/span><\/div>\n<div class=\"wp-block-uagb-icon-list-child uagb-block-f847d3a2 uagb-icon-list-repeater uagb-icon-list__wrapper\"><a target=\"_self\" aria-label=\"Integrate with external tools like Visual Studio Code or IntelliJ IDEA.\" rel=\"noopener noreferrer\" href=\"#\"> <\/a><span class=\"uagb-icon-list__source-wrap\"><svg xmlns=\"https:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 512 512\"><path d=\"M256 0C114.6 0 0 114.6 0 256c0 141.4 114.6 256 256 256s256-114.6 256-256C512 114.6 397.4 0 256 0zM406.6 278.6l-103.1 103.1c-12.5 12.5-32.75 12.5-45.25 0s-12.5-32.75 0-45.25L306.8 288H128C110.3 288 96 273.7 96 256s14.31-32 32-32h178.8l-49.38-49.38c-12.5-12.5-12.5-32.75 0-45.25s32.75-12.5 45.25 0l103.1 103.1C414.6 241.3 416 251.1 416 256C416 260.9 414.6 270.7 406.6 278.6z\"><\/path><\/svg><\/span><span class=\"uagb-icon-list__label\">Integrate with external tools like Visual Studio Code or IntelliJ IDEA.<\/span><\/div>\n<\/div>\n<\/div>\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<p>Docker Desktop is available for Windows, macOS and Linux, and runs without problems on modern systems.<\/p>\n<p>A key advantage of Docker Desktop is <strong>the ability to experiment locally<\/strong> with the same configurations used in production. This minimises problems during the transition between development and production environments. This makes it ideal for companies that want a <a href=\"https:\/\/www.combell.com\/en\/hybrid-cloud-servers\">hybrid cloud<\/a>-strategy, where local and cloud environments need to work seamlessly together.<\/p>\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<h2 class=\"wp-block-heading\">Docker: A solution for modern software development challenges<\/h2>\n<p>Docker is a powerful tool that has significantly improved software development and IT management. By using containers, you can develop and deploy applications quickly, consistently, and flexibly. Whether you are an individual developer or leading a large IT team, Docker offers an efficient solution to the challenges of modern software development.<\/p>\n<p>Additionally, Docker is an <strong>excellent springboard<\/strong> to more advanced technologies like Kubernetes and cloud-native development. With its wide range of applications and benefits, Docker has had a lasting impact on how software is built and managed.<\/p>\n<p>Using Docker for your development process can increase your productivity and improve the overall quality of your software.<\/p>\n<p>Would you like support in managing your containers? Then check out Combell's <a href=\"https:\/\/www.combell.com\/en\/managed-container-services\">Managed Container Services<\/a> and find out what we can do for your company.<\/p>\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<div class=\"wp-block-buttons is-vertical is-content-justification-center is-layout-flex wp-container-core-buttons-is-layout-1 wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button is-style-fill\"><a class=\"wp-block-button__link has-white-color has-yellow-background-color has-text-color has-background wp-element-button\" href=\"https:\/\/www.combell.com\/en\/managed-container-services\">Innovate and grow with smart container management<\/a><\/div>\n<\/div>\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<h2 class=\"wp-block-heading\">Frequently asked questions about Docker<\/h2>\n<div class=\"wp-block-uagb-faq uagb-faq__outer-wrap uagb-block-a9ef6185 uagb-faq-icon-row uagb-faq-layout-accordion uagb-faq-expand-first-false uagb-faq-inactive-other-true uagb-faq__wrap uagb-buttons-layout-wrap uagb-faq-equal-height uagb-faq-expand-first-true\" data-faqtoggle=\"true\" role=\"tablist\"><script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"@id\":\"https:\/\/www.combell.com\/en\/blog\/what-is-docker\/\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Is Docker free?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, Docker offers a free Community Edition (CE) ideal for individual use. For business applications, there are paid options with additional features.\"}},{\"@type\":\"Question\",\"name\":\"What do I need to get started with Docker?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"A computer with a supported operating system (Windows, macOS, or Linux) and basic command-line knowledge.\"}},{\"@type\":\"Question\",\"name\":\"Which programming languages does Docker support?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Docker supports all programming languages. As long as you include the necessary dependencies and configurations in your container, you can use any language.\"}},{\"@type\":\"Question\",\"name\":\"Can Docker run on older systems?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"While Docker runs on most modern systems, older systems may have limited compatibility. Always check the system requirements before installing Docker.\"}}]}<\/script><\/p>\n<div class=\"wp-block-uagb-faq-child uagb-faq-child__outer-wrap uagb-faq-item uagb-block-102aff7d\" role=\"tab\" tabindex=\"0\">\n<div class=\"uagb-faq-questions-button uagb-faq-questions\"><span class=\"uagb-icon uagb-faq-icon-wrap\"><svg xmlns=\"https:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 448 512\"><path d=\"M432 256c0 17.69-14.33 32.01-32 32.01H256v144c0 17.69-14.33 31.99-32 31.99s-32-14.3-32-31.99v-144H48c-17.67 0-32-14.32-32-32.01s14.33-31.99 32-31.99H192v-144c0-17.69 14.33-32.01 32-32.01s32 14.32 32 32.01v144h144C417.7 224 432 238.3 432 256z\"><\/path><\/svg><\/span><span class=\"uagb-icon-active uagb-faq-icon-wrap\"><svg xmlns=\"https:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 448 512\"><path d=\"M400 288h-352c-17.69 0-32-14.32-32-32.01s14.31-31.99 32-31.99h352c17.69 0 32 14.3 32 31.99S417.7 288 400 288z\"><\/path><\/svg><\/span><\/p>\n<h4 class=\"uagb-question\">Is Docker free?<\/h4>\n<\/div>\n<p class=\"uagb-faq-content\">Yes, Docker offers a free Community Edition (CE) ideal for individual use. For business applications, there are paid options with additional features.<\/p>\n<\/div>\n<div class=\"wp-block-uagb-faq-child uagb-faq-child__outer-wrap uagb-faq-item uagb-block-5ef170f3\" role=\"tab\" tabindex=\"0\">\n<div class=\"uagb-faq-questions-button uagb-faq-questions\"><span class=\"uagb-icon uagb-faq-icon-wrap\"><svg xmlns=\"https:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 448 512\"><path d=\"M432 256c0 17.69-14.33 32.01-32 32.01H256v144c0 17.69-14.33 31.99-32 31.99s-32-14.3-32-31.99v-144H48c-17.67 0-32-14.32-32-32.01s14.33-31.99 32-31.99H192v-144c0-17.69 14.33-32.01 32-32.01s32 14.32 32 32.01v144h144C417.7 224 432 238.3 432 256z\"><\/path><\/svg><\/span><span class=\"uagb-icon-active uagb-faq-icon-wrap\"><svg xmlns=\"https:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 448 512\"><path d=\"M400 288h-352c-17.69 0-32-14.32-32-32.01s14.31-31.99 32-31.99h352c17.69 0 32 14.3 32 31.99S417.7 288 400 288z\"><\/path><\/svg><\/span><\/p>\n<h4 class=\"uagb-question\">What do I need to get started with Docker?<\/h4>\n<\/div>\n<p class=\"uagb-faq-content\">A computer with a supported operating system (Windows, macOS, or Linux) and basic command-line knowledge.<\/p>\n<\/div>\n<div class=\"wp-block-uagb-faq-child uagb-faq-child__outer-wrap uagb-faq-item uagb-block-987516ba\" role=\"tab\" tabindex=\"0\">\n<div class=\"uagb-faq-questions-button uagb-faq-questions\"><span class=\"uagb-icon uagb-faq-icon-wrap\"><svg xmlns=\"https:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 448 512\"><path d=\"M432 256c0 17.69-14.33 32.01-32 32.01H256v144c0 17.69-14.33 31.99-32 31.99s-32-14.3-32-31.99v-144H48c-17.67 0-32-14.32-32-32.01s14.33-31.99 32-31.99H192v-144c0-17.69 14.33-32.01 32-32.01s32 14.32 32 32.01v144h144C417.7 224 432 238.3 432 256z\"><\/path><\/svg><\/span><span class=\"uagb-icon-active uagb-faq-icon-wrap\"><svg xmlns=\"https:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 448 512\"><path d=\"M400 288h-352c-17.69 0-32-14.32-32-32.01s14.31-31.99 32-31.99h352c17.69 0 32 14.3 32 31.99S417.7 288 400 288z\"><\/path><\/svg><\/span><\/p>\n<h4 class=\"uagb-question\">Which programming languages does Docker support?<\/h4>\n<\/div>\n<p class=\"uagb-faq-content\">Docker supports all programming languages. As long as you include the necessary dependencies and configurations in your container, you can use any language.<\/p>\n<\/div>\n<div class=\"wp-block-uagb-faq-child uagb-faq-child__outer-wrap uagb-faq-item uagb-block-011428c1\" role=\"tab\" tabindex=\"0\">\n<div class=\"uagb-faq-questions-button uagb-faq-questions\"><span class=\"uagb-icon uagb-faq-icon-wrap\"><svg xmlns=\"https:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 448 512\"><path d=\"M432 256c0 17.69-14.33 32.01-32 32.01H256v144c0 17.69-14.33 31.99-32 31.99s-32-14.3-32-31.99v-144H48c-17.67 0-32-14.32-32-32.01s14.33-31.99 32-31.99H192v-144c0-17.69 14.33-32.01 32-32.01s32 14.32 32 32.01v144h144C417.7 224 432 238.3 432 256z\"><\/path><\/svg><\/span><span class=\"uagb-icon-active uagb-faq-icon-wrap\"><svg xmlns=\"https:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 448 512\"><path d=\"M400 288h-352c-17.69 0-32-14.32-32-32.01s14.31-31.99 32-31.99h352c17.69 0 32 14.3 32 31.99S417.7 288 400 288z\"><\/path><\/svg><\/span><\/p>\n<h4 class=\"uagb-question\">Can Docker run on older systems?<\/h4>\n<\/div>\n<p class=\"uagb-faq-content\">While Docker runs on most modern systems, older systems may have limited compatibility. Always check the system requirements before installing Docker.<\/p>\n<\/div>\n<\/div>\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Docker is an open-source platform that allows software developers and IT administrators to easily develop, package, and distribute applications in containers. But what exactly is a Docker container? And why...<\/p>\n","protected":false},"author":33,"featured_media":13005,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","footnotes":""},"categories":[61],"tags":[1206,394],"acf":[],"uagb_featured_image_src":{"full":["https:\/\/www.combell.com\/en\/blog\/files\/wat-is-docker-header-small.jpg",1200,420,false],"thumbnail":["https:\/\/www.combell.com\/en\/blog\/files\/wat-is-docker-header-small-50x50.jpg",50,50,true],"medium":["https:\/\/www.combell.com\/en\/blog\/files\/wat-is-docker-header-small-300x105.jpg",300,105,true],"medium_large":["https:\/\/www.combell.com\/en\/blog\/files\/wat-is-docker-header-small-768x269.jpg",768,269,true],"large":["https:\/\/www.combell.com\/en\/blog\/files\/wat-is-docker-header-small-1024x358.jpg",1024,358,true],"1536x1536":["https:\/\/www.combell.com\/en\/blog\/files\/wat-is-docker-header-small.jpg",1200,420,false],"2048x2048":["https:\/\/www.combell.com\/en\/blog\/files\/wat-is-docker-header-small.jpg",1200,420,false],"post-featured":["https:\/\/www.combell.com\/en\/blog\/files\/wat-is-docker-header-small-850x290.jpg",850,290,true],"post-featured-opt":["https:\/\/www.combell.com\/en\/blog\/files\/wat-is-docker-header-small-750x256.jpg",750,256,true],"post-featured-opt-md":["https:\/\/www.combell.com\/en\/blog\/files\/wat-is-docker-header-small-850x290.jpg",850,290,true],"post-featured-opt-sm":["https:\/\/www.combell.com\/en\/blog\/files\/wat-is-docker-header-small-485x165.jpg",485,165,true],"post-featured-opt-xs":["https:\/\/www.combell.com\/en\/blog\/files\/wat-is-docker-header-small-375x128.jpg",375,128,true],"post-most-popular":["https:\/\/www.combell.com\/en\/blog\/files\/wat-is-docker-header-small-50x50.jpg",50,50,true],"post-author":["https:\/\/www.combell.com\/en\/blog\/files\/wat-is-docker-header-small-60x60.jpg",60,60,true]},"uagb_author_info":{"display_name":"Amber","author_link":"https:\/\/www.combell.com\/en\/blog\/author\/amber\/"},"uagb_comment_info":0,"uagb_excerpt":"Docker is an open-source platform that allows software developers and IT administrators to easily develop, package, and distribute applications in containers. But what exactly is a Docker container? And why...","_links":{"self":[{"href":"https:\/\/www.combell.com\/en\/blog\/wp-json\/wp\/v2\/posts\/8275"}],"collection":[{"href":"https:\/\/www.combell.com\/en\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.combell.com\/en\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.combell.com\/en\/blog\/wp-json\/wp\/v2\/users\/33"}],"replies":[{"embeddable":true,"href":"https:\/\/www.combell.com\/en\/blog\/wp-json\/wp\/v2\/comments?post=8275"}],"version-history":[{"count":14,"href":"https:\/\/www.combell.com\/en\/blog\/wp-json\/wp\/v2\/posts\/8275\/revisions"}],"predecessor-version":[{"id":13016,"href":"https:\/\/www.combell.com\/en\/blog\/wp-json\/wp\/v2\/posts\/8275\/revisions\/13016"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.combell.com\/en\/blog\/wp-json\/wp\/v2\/media\/13005"}],"wp:attachment":[{"href":"https:\/\/www.combell.com\/en\/blog\/wp-json\/wp\/v2\/media?parent=8275"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.combell.com\/en\/blog\/wp-json\/wp\/v2\/categories?post=8275"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.combell.com\/en\/blog\/wp-json\/wp\/v2\/tags?post=8275"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}