--- title: What Is Docker and How It Creates a Container | daily.dev description: An introductory explanation breaks Docker down into three distinct components: the image (an immutable package containing code, dependencies, and... canonical: https://daily.dev/posts/what-is-docker-and-how-it-creates-a-container-zuwznqbaf twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: What Is Docker and How It Creates a Container | daily.dev og:description: An introductory explanation breaks Docker down into three distinct components: the image (an immutable package containing code, dependencies, and... og:url: https://daily.dev/posts/what-is-docker-and-how-it-creates-a-container-zuwznqbaf og:image: https://api.daily.dev/og/posts/zUwznqbaF.png og:image:alt: What Is Docker and How It Creates a Container og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # What Is Docker and How It Creates a Container **[We Are .NET](https://daily.dev/sources/wearedotnet)** · 4 min read · 2 upvotes · 0 comments ## Summary An introductory explanation breaks Docker down into three distinct components: the image (an immutable package containing code, dependencies, and configuration), the container (an isolated process created from that image), and the Docker engine (which receives commands and coordinates container startup). Using the docker run command as an example, it clarifies that an image is a static template while a container is the running process derived from it, and that multiple containers can be created from a single unchanged image. It closes by teasing a follow-up on image layers, Dockerfiles, and registries. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### What is the difference between a Docker image and a Docker container? A Docker image is an immutable package containing the files, binaries, libraries, and configuration needed to run an application, while a container is the isolated process created when that image is started. The image acts as a static template that never changes, and multiple separate containers can be started from the same unchanged image. _Developers learning container fundamentals can find more Docker explainers like this on daily.dev._ ### What role does the Docker engine play when running docker run? The Docker engine receives the docker run instruction and coordinates starting the container process from the specified image. It is neither the image nor the container itself, but the underlying system that uses the image as a template to launch and manage the isolated process that becomes the container. _Anyone piecing together how Docker commands actually work can track similar breakdowns on daily.dev._ ## Similar posts on daily.dev - [Docker Images vs Containers Explained: The Complete Beginner Guide with Examples \(2026\)](https://daily.dev/posts/docker-images-vs-containers-explained-the-complete-beginner-guide-with-examples-2026--uaeekolsa) · Medium · 0 upvotes · 0 comments --- Tags: [#devops](https://daily.dev/tags/devops), [#docker](https://daily.dev/tags/docker), [#containers](https://daily.dev/tags/containers) [View this post on daily.dev](https://daily.dev/posts/what-is-docker-and-how-it-creates-a-container-zuwznqbaf) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"What Is Docker and How It Creates a Container","url":"https://daily.dev/posts/what-is-docker-and-how-it-creates-a-container-zuwznqbaf","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/what-is-docker-and-how-it-creates-a-container-zuwznqbaf"},"datePublished":"2026-08-31T19:16:17.837Z","dateModified":"2026-08-31T19:16:36.857Z","description":"An introductory explanation breaks Docker down into three distinct components: the image (an immutable package containing code, dependencies, and...","image":"https://i.ytimg.com/vi/7zNdcd9JEZc/sddefault.jpg","thumbnailUrl":"https://i.ytimg.com/vi/7zNdcd9JEZc/sddefault.jpg","isAccessibleForFree":true,"articleSection":"We Are .NET","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"We Are .NET","logo":"https://media.daily.dev/image/upload/s--BsnVOa3i--/f_auto/v1718347410/logos/wearedotnet","url":"https://daily.dev/sources/wearedotnet"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/what-is-docker-and-how-it-creates-a-container-zuwznqbaf","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":2},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"devops,docker,containers","timeRequired":"PT4M","video":{"@type":"VideoObject","name":"What Is Docker and How It Creates a Container","description":"An introductory explanation breaks Docker down into three distinct components: the image (an immutable package containing code, dependencies, and...","thumbnailUrl":"https://i.ytimg.com/vi/7zNdcd9JEZc/sddefault.jpg","uploadDate":"2026-08-31T19:16:17.837Z","duration":"PT4M","url":"https://api.daily.dev/r/zUwznqbaF","embedUrl":"https://www.youtube.com/embed/7zNdcd9JEZc"}} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"We Are .NET","item":"https://daily.dev/sources/wearedotnet"},{"@type":"ListItem","position":3,"name":"What Is Docker and How It Creates a Container"}]} {"@context":"https://schema.org","@type":"FAQPage","@id":"https://daily.dev/posts/what-is-docker-and-how-it-creates-a-container-zuwznqbaf#faq","mainEntity":[{"@type":"Question","name":"What is the difference between a Docker image and a Docker container?","acceptedAnswer":{"@type":"Answer","text":"A Docker image is an immutable package containing the files, binaries, libraries, and configuration needed to run an application, while a container is the isolated process created when that image is started. 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