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23 de oct. de 2023 · At its core, Docker has two concepts that are useful to understand: the Dockerfile and Docker Images. A Dockerfile contains the set of instructions for building a Docker Image. A Docker Image serves as a template for creating Docker containers.
15 de jun. de 2021 · Docker uses the Dockerfile to construct an image. Images define the software available in containers. This is loosely equivalent to starting a VM with an operating system ISO. If you create an image, any Docker user will be able to launch your app with docker run.
When you use Docker, you are creating and using images, containers, networks, volumes, plugins, and other objects. This section is a brief overview of some of those objects. Images. An image is a read-only template with instructions for creating a Docker container. Often, an image is based on another image, with some additional customization.
In this self-paced, hands-on tutorial, you will learn how to build images, run containers, use volumes to persist data and mount in source code, and define your application using Docker Compose. You’ll even learn about a few advanced topics, such as networking and image building best practices.
17 de mar. de 2021 · In this introduction, we’ll not only take you through the basics of Docker images, but also show you where to find ready-made, off-the-shelf images that will give you a head start in building your own containerized applications, tools, and services.
11 de mar. de 2024 · Overview. We can think of a Docker image as an inert template used to create Docker containers. Images typically start with a root filesystem and add filesystem changes and their corresponding execution parameters in ordered, read-only layers.
Learn how to build your first Docker image, a key step in containerizing your application. We'll guide you through the process of creating an image repository and building and pushing your image to Docker Hub.
