{"id":168307,"date":"2023-05-26T15:35:23","date_gmt":"2023-05-26T14:35:23","guid":{"rendered":"https:\/\/datascientest.com\/en\/?p=168307"},"modified":"2023-05-26T15:35:25","modified_gmt":"2023-05-26T14:35:25","slug":"docker-definition-and-tutorial","status":"publish","type":"post","link":"https:\/\/datascientest.com\/en\/docker-definition-and-tutorial","title":{"rendered":"Docker: what is it and how do I use it?"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"168307\" class=\"elementor elementor-168307\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-b65455c e-flex e-con-boxed e-con\" data-id=\"b65455c\" data-element_type=\"container\" data-settings=\"{&quot;content_width&quot;:&quot;boxed&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-7ca0671 elementor-widget elementor-widget-heading\" data-id=\"7ca0671\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.15.0 - 02-08-2023 *\/\n.elementor-heading-title{padding:0;margin:0;line-height:1}.elementor-widget-heading .elementor-heading-title[class*=elementor-size-]>a{color:inherit;font-size:inherit;line-height:inherit}.elementor-widget-heading .elementor-heading-title.elementor-size-small{font-size:15px}.elementor-widget-heading .elementor-heading-title.elementor-size-medium{font-size:19px}.elementor-widget-heading .elementor-heading-title.elementor-size-large{font-size:29px}.elementor-widget-heading .elementor-heading-title.elementor-size-xl{font-size:39px}.elementor-widget-heading .elementor-heading-title.elementor-size-xxl{font-size:59px}<\/style><h2 class=\"elementor-heading-title elementor-size-default\">Docker is the most widely used containerization platform. Find out everything you need to know about it: what it is, what it's for, how it works, and what training courses are available to learn how to use it.<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-e1a8c93 e-flex e-con-boxed e-con\" data-id=\"e1a8c93\" data-element_type=\"container\" data-settings=\"{&quot;content_width&quot;:&quot;boxed&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-93216b3 elementor-widget elementor-widget-heading\" data-id=\"93216b3\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">What is a container?<\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1a28cd5 elementor-widget elementor-widget-text-editor\" data-id=\"1a28cd5\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.15.0 - 02-08-2023 *\/\n.elementor-widget-text-editor.elementor-drop-cap-view-stacked .elementor-drop-cap{background-color:#69727d;color:#fff}.elementor-widget-text-editor.elementor-drop-cap-view-framed .elementor-drop-cap{color:#69727d;border:3px solid;background-color:transparent}.elementor-widget-text-editor:not(.elementor-drop-cap-view-default) .elementor-drop-cap{margin-top:8px}.elementor-widget-text-editor:not(.elementor-drop-cap-view-default) .elementor-drop-cap-letter{width:1em;height:1em}.elementor-widget-text-editor .elementor-drop-cap{float:left;text-align:center;line-height:1;font-size:50px}.elementor-widget-text-editor .elementor-drop-cap-letter{display:inline-block}<\/style>\t\t\t\t<p><span style=\"font-weight: 400;\">Containers and microservices are <\/span><b>increasingly being used<\/b><span style=\"font-weight: 400;\"> for application development and deployment. This is known as cloud-native development. In this context, Docker has become a <\/span><b>massively exploited solution <\/b><span style=\"font-weight: 400;\">in the enterprise.<\/span><\/p><p><span style=\"font-weight: 400;\">Before discovering Docker, you need to understand what a container is. It&#8217;s a lightweight runtime environment and an alternative to traditional virtualization methods based on virtual machines.<\/span><\/p><p><span style=\"font-weight: 400;\">One of the key practices of modern software development is to <\/span><b>isolate applications deployed<\/b><span style=\"font-weight: 400;\"> on the same host or cluster. This prevents them from interfering with each other.<\/span><\/p><p><span style=\"font-weight: 400;\">To run applications, however, it is necessary to <\/span><b>exploit packages<\/b><span style=\"font-weight: 400;\">, <\/span><b>libraries<\/b><span style=\"font-weight: 400;\">, and <\/span><b>various software components<\/b><span style=\"font-weight: 400;\">. Virtual machines have long been used to exploit these resources while isolating an application.<\/span><\/p><p><span style=\"font-weight: 400;\">These allow applications to be separated from each other on the same system, reducing conflicts between software components and competition for resources. However, an alternative has now emerged: <\/span><b>containers<\/b><span style=\"font-weight: 400;\">.<\/span><\/p><p><span style=\"font-weight: 400;\">A virtual machine is like a complete operating system, several gigabytes in size, enabling the <\/span><b>partitioning of infrastructure resources<\/b><span style=\"font-weight: 400;\">. A container delivers only the resources required by an application.<\/span><\/p><p><span style=\"font-weight: 400;\">Indeed, the container shares its <\/span><b>OS kernel<\/b><span style=\"font-weight: 400;\"> with other containers. This differs from a virtual machine, which uses a hypervisor to distribute hardware resources. This reduces the footprint of applications on the infrastructure. The container contains <\/span><b>all the system components needed<\/b><span style=\"font-weight: 400;\"> to run the code, without weighing as much as a complete OS.<\/span><\/p><p><span style=\"font-weight: 400;\">Similarly, a container is lighter and simpler than a virtual machine, so it can start up and shut down more quickly. It is therefore <\/span><b>more responsive and adaptable<\/b><span style=\"font-weight: 400;\"> to the fluctuating needs of application scaling.<\/span><\/p><p><span style=\"font-weight: 400;\">A final plus: unlike a hypervisor, a <\/span><b>container engine<\/b><span style=\"font-weight: 400;\"> doesn&#8217;t need to emulate a complete operating system. Containers, therefore, offer better performance than traditional virtual machine deployments.<\/span><\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-be8cd07 e-flex e-con-boxed e-con\" data-id=\"be8cd07\" data-element_type=\"container\" data-settings=\"{&quot;content_width&quot;:&quot;boxed&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-fb08768 elementor-widget elementor-widget-heading\" data-id=\"fb08768\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">What is Docker?<\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ddb31b3 elementor-widget elementor-widget-text-editor\" data-id=\"ddb31b3\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Docker is a container platform launched in 2013 that has greatly contributed to the <\/span><b>democratization of containerization<\/b><span style=\"font-weight: 400;\">. It makes it easy to create containers and container-based applications. There are others, but this is the most widely used. It&#8217;s also easier to deploy and use than its competitors.<\/span><\/p><p><span style=\"font-weight: 400;\">It&#8217;s open-source, secure, and cost-effective. Many individuals and companies are <\/span><b>contributing to the development <\/b><span style=\"font-weight: 400;\">of this project. A wide ecosystem of products, services, and resources is developed by this vast community.<\/span><\/p><p><span style=\"font-weight: 400;\">Initially designed for <\/span><a href=\"https:\/\/datascientest.com\/en\/linux-the-preferred-os-for-developers\"><span style=\"font-weight: 400;\">Linux<\/span><\/a><span style=\"font-weight: 400;\">, Docker also supports containers on Windows or Mac, thanks to a <\/span><b>Linux virtualization &#8220;layer&#8221;<\/b><span style=\"font-weight: 400;\"> between the Windows \/ macOS operating system and the Docker runtime environment. It is therefore possible to <\/span><b>run native Windows containers<\/b><span style=\"font-weight: 400;\"> on Windows or Linux container environments.<\/span><\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f11be89 elementor-widget__width-initial elementor-widget elementor-widget-image\" data-id=\"f11be89\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.15.0 - 02-08-2023 *\/\n.elementor-widget-image{text-align:center}.elementor-widget-image a{display:inline-block}.elementor-widget-image a img[src$=\".svg\"]{width:48px}.elementor-widget-image img{vertical-align:middle;display:inline-block}<\/style>\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"800\" height=\"684\" src=\"https:\/\/datascientest.com\/en\/files\/2023\/05\/Docker-1024x876.jpeg\" class=\"attachment-large size-large wp-image-168322\" alt=\"Docker logo\" srcset=\"https:\/\/datascientest.com\/en\/files\/2023\/05\/Docker-1024x876.jpeg 1024w, https:\/\/datascientest.com\/en\/files\/2023\/05\/Docker-300x257.jpeg 300w, https:\/\/datascientest.com\/en\/files\/2023\/05\/Docker-768x657.jpeg 768w, https:\/\/datascientest.com\/en\/files\/2023\/05\/Docker.jpeg 1316w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-78b160e e-flex e-con-boxed e-con\" data-id=\"78b160e\" data-element_type=\"container\" data-settings=\"{&quot;content_width&quot;:&quot;boxed&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-07992d1 elementor-widget elementor-widget-heading\" data-id=\"07992d1\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">What are the different components of Docker?<\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6488623 elementor-widget elementor-widget-text-editor\" data-id=\"6488623\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">The Docker platform is based on several technologies and components. Here are the main elements.<\/span><\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8c006a6 elementor-widget elementor-widget-heading\" data-id=\"8c006a6\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h5 class=\"elementor-heading-title elementor-size-default\">Docker Engine<\/h5>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-36816a2 elementor-widget elementor-widget-text-editor\" data-id=\"36816a2\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">The Docker Engine is the application to be installed on the host machine to create, run and manage Docker containers. As its name suggests, it is the engine of the Docker system.<\/span><\/p><p><span style=\"font-weight: 400;\">It is this engine that groups and links the various components together. It is the <\/span><b>client-server technology<\/b><span style=\"font-weight: 400;\"> used to create and run containers, and the term Docker is often used to designate Docker Engine.\u00a0<\/span><\/p><p><span style=\"font-weight: 400;\">A distinction is made between Docker Engine Enterprise and Docker Engine Community. The Docker Community Edition is the original version, offered as <\/span><b>open source free of charge<\/b><span style=\"font-weight: 400;\">.<\/span><\/p><p><span style=\"font-weight: 400;\">The Enterprise version, launched in 2017, adds management features such as cluster control and image management or vulnerability detection. It is priced at $1,500 per node per year.<\/span><\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6f69bc1 elementor-widget elementor-widget-heading\" data-id=\"6f69bc1\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h5 class=\"elementor-heading-title elementor-size-default\">Docker Daemon\n<\/h5>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-98d0a40 elementor-widget elementor-widget-text-editor\" data-id=\"98d0a40\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">The Docker Daemon <\/span><b>processes API requests<\/b><span style=\"font-weight: 400;\"> to manage various aspects of the installation such as images, containers, or storage volumes.<\/span><\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4b6a74d elementor-widget elementor-widget-heading\" data-id=\"4b6a74d\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h5 class=\"elementor-heading-title elementor-size-default\">Docker Client<\/h5>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7d2027f elementor-widget elementor-widget-text-editor\" data-id=\"7d2027f\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">The Docker Client is the <\/span><b>main interface for communicating<\/b><span style=\"font-weight: 400;\"> with the Docker system. It receives commands via the command-line interface and forwards them to the Docker Daemon.<\/span><\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a28b6dc elementor-widget elementor-widget-heading\" data-id=\"a28b6dc\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h5 class=\"elementor-heading-title elementor-size-default\">Dockerfile<\/h5>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e4021e2 elementor-widget elementor-widget-text-editor\" data-id=\"e4021e2\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Every Docker container starts with a &#8220;Dockerfile&#8221;. This is a <\/span><b>text file written in understandable syntax<\/b><span style=\"font-weight: 400;\">, containing the instructions for creating a Docker image.<\/span><\/p><p><span style=\"font-weight: 400;\">A Dockerfile specifies the operating system on which the container will be based, and the languages, environmental variables, file locations, network ports, and other components required.<\/span><\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b0b7c47 elementor-widget elementor-widget-heading\" data-id=\"b0b7c47\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h5 class=\"elementor-heading-title elementor-size-default\">Docker images<\/h5>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3fd4e56 elementor-widget elementor-widget-text-editor\" data-id=\"3fd4e56\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">A Docker image is a read-only template used to create Docker containers. It is made up of several layers packaging all the installations, dependencies, libraries, processes and application code required for a fully operational container environment.<\/span><\/p><p><span style=\"font-weight: 400;\">Once the Dockerfile has been written, the <\/span><b>&#8220;build&#8221; utility<\/b><span style=\"font-weight: 400;\"> is invoked to create an image based on this file. This image is presented as a portable file indicating which software components the container will run and how.<\/span><\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e53ddae elementor-align-center button-principal elementor-widget elementor-widget-button\" data-id=\"e53ddae\" data-element_type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-md\" href=\"https:\/\/datascientest.com\/en\/data-engineer-course\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t<span class=\"elementor-button-text\">Understand the different Docker components<\/span>\n\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-fea25c8 elementor-widget elementor-widget-heading\" data-id=\"fea25c8\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h5 class=\"elementor-heading-title elementor-size-default\">Docker containers<\/h5>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e53038a elementor-widget elementor-widget-text-editor\" data-id=\"e53038a\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">A Docker container is an instance of a Docker image running on an individual microservice or a complete application stack. When a container is launched, <\/span><b>a writable layer is added<\/b><span style=\"font-weight: 400;\"> to the image. This stores all changes made to the container during the runtime.<\/span><\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-67a90e5 elementor-widget elementor-widget-heading\" data-id=\"67a90e5\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h5 class=\"elementor-heading-title elementor-size-default\">Docker run<\/h5>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-09a5e5e elementor-widget elementor-widget-text-editor\" data-id=\"09a5e5e\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Docker&#8217;s &#8220;run&#8221; utility is the command used to launch a container. Each container is an instance of an image.<\/span><\/p><p><span style=\"font-weight: 400;\">Containers are designed to be temporary, but can be stopped and restarted in the same state. <\/span><b>Multiple instances<\/b><span style=\"font-weight: 400;\"> of the same image can be run simultaneously.<\/span><\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f3ff193 elementor-widget elementor-widget-heading\" data-id=\"f3ff193\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h5 class=\"elementor-heading-title elementor-size-default\">The Docker registry<\/h5>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-77f969c elementor-widget elementor-widget-text-editor\" data-id=\"77f969c\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">The Docker Registry is a <\/span><b>cataloging system for hosting<\/b><span style=\"font-weight: 400;\"> and push-and-pull Docker images. You can use your local registry, or one of the many registry services hosted by third parties such as <\/span><b>Red Hat Quay<\/b><span style=\"font-weight: 400;\">, <\/span><b>Amazon ECR<\/b><span style=\"font-weight: 400;\">, and <\/span><b>Google Container Registry<\/b><span style=\"font-weight: 400;\">.<\/span><\/p><p><span style=\"font-weight: 400;\">The Docker Hub is the official Docker registry. It&#8217;s a SaaS directory for <\/span><b>managing and sharing containers<\/b><span style=\"font-weight: 400;\">. Docker images from open-source projects and software vendors can be found there. You can download these images and share your own.<\/span><\/p><p><span style=\"font-weight: 400;\">A Docker registry <\/span><b>organizes images<\/b><span style=\"font-weight: 400;\"> in different storage directories. Each of these contains different versions of a Docker image sharing the same image name.<\/span><\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8f9cc31 elementor-widget elementor-widget-heading\" data-id=\"8f9cc31\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h5 class=\"elementor-heading-title elementor-size-default\">The History of Docker<\/h5>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ad48596 elementor-widget elementor-widget-text-editor\" data-id=\"ad48596\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Docker Inc was founded by Solomon Hykes, Kamel Founadi, and Sebastien Pahl during the Y Combinator Summer 2010 startup incubation group. The company was launched in 2011.<\/span><\/p><p><span style=\"font-weight: 400;\">It was also <\/span><b>one of the 12 startups in the first Founder&#8217;s Den cohort<\/b><span style=\"font-weight: 400;\">. The project was initiated by Solomon Hykes in France, as an internal company project for a platform as a service dotCloud.<\/span><\/p><p><span style=\"font-weight: 400;\">In 2013, Docker was presented to the public in Santa Clara as part of PyCon. The software was <\/span><b>launched as open-source<\/b><span style=\"font-weight: 400;\"> in March 2013. At the time, LXC was used as the default runtime environment, before being replaced a year later with<\/span><b> Docker version 0.9<\/b><span style=\"font-weight: 400;\"> by its own libcontainer component written in the Go language.<\/span><\/p><p><span style=\"font-weight: 400;\">Over the years, Docker has forged numerous strategic partnerships with Cloud and IT giants: Red Hat in 2013, Microsoft, IBM, and Amazon Web Services in 2014, Oracle in 2015, but also Cisco, Google, and Huawei.<\/span><\/p><p><span style=\"font-weight: 400;\">Since 2016, Docker can be<\/span><b> used natively on Windows 10<\/b><span style=\"font-weight: 400;\">. In the same year, an analysis by LinkedIn revealed that the number of mentions of the software on user profiles had increased by 160%.<\/span><\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-d3f826d e-flex e-con-boxed e-con\" data-id=\"d3f826d\" data-element_type=\"container\" data-settings=\"{&quot;content_width&quot;:&quot;boxed&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-904a203 elementor-widget elementor-widget-heading\" data-id=\"904a203\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">How does Docker work?<\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6a7e225 elementor-widget elementor-widget-text-editor\" data-id=\"6a7e225\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Docker is<\/span><b> based on the Linux kernel<\/b><span style=\"font-weight: 400;\"> and kernel functions such as groups and namespaces. It is these functions that enable processes to be separated so that they can run independently.<\/span><\/p><p><span style=\"font-weight: 400;\">Indeed, the purpose of containers is to run several processes and applications separately. This optimizes the use of infrastructure without reducing the level of security compared with separate systems.<\/span><\/p><p><span style=\"font-weight: 400;\">All container tools like Docker are associated with an <\/span><b>image-based deployment model<\/b><span style=\"font-weight: 400;\">. This model simplifies the sharing of an application or set of services across multiple environments.<\/span><\/p><p><span style=\"font-weight: 400;\">Docker also <\/span><b>automates the deployment of applications<\/b><span style=\"font-weight: 400;\"> within a container environment. Thanks to these various tools, users benefit from complete access to applications and can accelerate deployment, control versions, and assign them.<\/span><\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-adec118 e-flex e-con-boxed e-con\" data-id=\"adec118\" data-element_type=\"container\" data-settings=\"{&quot;content_width&quot;:&quot;boxed&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-6b3ebb6 elementor-widget elementor-widget-heading\" data-id=\"6b3ebb6\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">What is container orchestration?<\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-79d2577 elementor-widget elementor-widget-text-editor\" data-id=\"79d2577\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Docker makes it easy to <\/span><b>coordinate behavior<\/b><span style=\"font-weight: 400;\"> between containers and <\/span><b>connect them to create application stacks<\/b><span style=\"font-weight: 400;\">. To simplify the process of developing and testing multi-container applications, Docker has <\/span><b>created Docker Compose<\/b><span style=\"font-weight: 400;\">.<\/span><\/p><p><span style=\"font-weight: 400;\">This is a command-line tool, similar to the Docker client, using a specifically formatted description file to <\/span><b>assemble applications from multiple containers<\/b><span style=\"font-weight: 400;\"> and run them on a single host.<\/span><\/p><p><span style=\"font-weight: 400;\">When an application is ready to be deployed on Docker, it is necessary to be able to provision, configure, extend, and monitor the containers on the microservice architecture.<\/span><\/p><p><span style=\"font-weight: 400;\">To achieve this, open-source container orchestration systems such as <\/span><b>Kubernetes<\/b><span style=\"font-weight: 400;\">, <\/span><b>Mesos<\/b><span style=\"font-weight: 400;\">, and <\/span><b>Docker Swarm<\/b><span style=\"font-weight: 400;\"> are used. These systems provide the tools needed to manage container clusters.<\/span><\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-05047e0 elementor-widget__width-initial elementor-widget elementor-widget-video\" data-id=\"05047e0\" data-element_type=\"widget\" data-settings=\"{&quot;youtube_url&quot;:&quot;https:\\\/\\\/www.youtube.com\\\/watch?v=2vMEQ5zs1ko&quot;,&quot;video_type&quot;:&quot;youtube&quot;,&quot;controls&quot;:&quot;yes&quot;}\" data-widget_type=\"video.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.15.0 - 02-08-2023 *\/\n.elementor-widget-video .elementor-widget-container{overflow:hidden;transform:translateZ(0)}.elementor-widget-video .elementor-wrapper{aspect-ratio:var(--video-aspect-ratio)}.elementor-widget-video .elementor-wrapper iframe,.elementor-widget-video .elementor-wrapper video{height:100%;width:100%;display:flex;border:none;background-color:#000}@supports not (aspect-ratio:1\/1){.elementor-widget-video .elementor-wrapper{position:relative;overflow:hidden;height:0;padding-bottom:calc(100% \/ var(--video-aspect-ratio))}.elementor-widget-video .elementor-wrapper iframe,.elementor-widget-video .elementor-wrapper video{position:absolute;top:0;right:0;bottom:0;left:0}}.elementor-widget-video .elementor-open-inline .elementor-custom-embed-image-overlay{position:absolute;top:0;right:0;bottom:0;left:0;background-size:cover;background-position:50%}.elementor-widget-video .elementor-custom-embed-image-overlay{cursor:pointer;text-align:center}.elementor-widget-video .elementor-custom-embed-image-overlay:hover .elementor-custom-embed-play i{opacity:1}.elementor-widget-video .elementor-custom-embed-image-overlay img{display:block;width:100%;aspect-ratio:var(--video-aspect-ratio);-o-object-fit:cover;object-fit:cover;-o-object-position:center center;object-position:center center}@supports not (aspect-ratio:1\/1){.elementor-widget-video .elementor-custom-embed-image-overlay{position:relative;overflow:hidden;height:0;padding-bottom:calc(100% \/ var(--video-aspect-ratio))}.elementor-widget-video .elementor-custom-embed-image-overlay img{position:absolute;top:0;right:0;bottom:0;left:0}}.elementor-widget-video .e-hosted-video .elementor-video{-o-object-fit:cover;object-fit:cover}.e-con-inner>.elementor-widget-video,.e-con>.elementor-widget-video{width:var(--container-widget-width);--flex-grow:var(--container-widget-flex-grow)}<\/style>\t\t<div class=\"elementor-wrapper elementor-open-inline\">\n\t\t\t<div class=\"elementor-video\"><\/div>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-7d9da83 e-flex e-con-boxed e-con\" data-id=\"7d9da83\" data-element_type=\"container\" data-settings=\"{&quot;content_width&quot;:&quot;boxed&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-e07a226 elementor-widget elementor-widget-heading\" data-id=\"e07a226\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">What is Docker Desktop?<\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-967b301 elementor-widget elementor-widget-text-editor\" data-id=\"967b301\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Docker Desktop is Docker&#8217;s native PC application for Windows and Mac. It&#8217;s the <\/span><b>easiest way<\/b> <b>to run<\/b><span style=\"font-weight: 400;\">, build, debug, and test Dockerized applications.<\/span><\/p><p><span style=\"font-weight: 400;\">It brings together key features such as rapid test cycles, file change notifications, enterprise network support, and complete flexibility in the <\/span><b>choice of proxies<\/b><span style=\"font-weight: 400;\"> and <\/span><b>VPNs<\/b><span style=\"font-weight: 400;\">.<\/span><\/p><p><span style=\"font-weight: 400;\">The Docker Desktop application brings together developer tools, Docker App, Kubernetes, and version synchronization. It lets you create images and templates by choosing languages and tools.<\/span><\/p><p><span style=\"font-weight: 400;\">The main benefits are speed, security, and flexibility. A distinction is made between the free Community edition, and the paid Enterprise edition, which adds extra features for security, management, orchestration, and administration.<\/span><\/p><p><b>Two different versions<\/b><span style=\"font-weight: 400;\"> of Docker Desktop are available. The Stable version has been rigorously tested and can be used to develop reliable applications. Updates are released in parallel with those of the Docker Engine.<\/span><\/p><p><span style=\"font-weight: 400;\">On the other hand, the Edge version includes <\/span><b>new experimental Docker Engine features<\/b><span style=\"font-weight: 400;\">. So there&#8217;s a risk of bugs, crashes, and other technical problems. However, this version allows you to try out the new features in advance.<\/span><\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-480bd00 elementor-align-center button-principal elementor-widget elementor-widget-button\" data-id=\"480bd00\" data-element_type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-md\" href=\"https:\/\/datascientest.com\/en\/data-engineer-course\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t<span class=\"elementor-button-text\">Become an expert with Docker Desktop<\/span>\n\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-6d1d454 e-flex e-con-boxed e-con\" data-id=\"6d1d454\" data-element_type=\"container\" data-settings=\"{&quot;content_width&quot;:&quot;boxed&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-b3f2b72 elementor-widget elementor-widget-heading\" data-id=\"b3f2b72\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Installing a web server on a Docker container\n<\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9679b66 elementor-widget elementor-widget-text-editor\" data-id=\"9679b66\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">It&#8217;s also possible to install an Apache Web Server inside a Docker container. As a reminder, <\/span><b>Apache Web Server<\/b><span style=\"font-weight: 400;\"> is an open-source tool for creating, deploying, and managing web servers.<\/span><\/p><p><span style=\"font-weight: 400;\">Among its many features are an authentication mechanism, database support, server-side scripting, and <\/span><b>compatibility with multiple programming languages<\/b><span style=\"font-weight: 400;\">.<\/span><\/p><p><span style=\"font-weight: 400;\">One of Apache&#8217;s key advantages is its ability to handle large volumes of traffic with minimal configuration. It is compatible with Linux, macOS, and Windows. Companies use it for <\/span><b>virtual or shared hosting<\/b><span style=\"font-weight: 400;\">.<\/span><\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-78ef592 e-flex e-con-boxed e-con\" data-id=\"78ef592\" data-element_type=\"container\" data-settings=\"{&quot;content_width&quot;:&quot;boxed&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-0e6d710 elementor-widget elementor-widget-heading\" data-id=\"0e6d710\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">The benefits of Docker<\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-68c2cb8 elementor-widget elementor-widget-text-editor\" data-id=\"68c2cb8\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Docker offers multiple advantages, enabling the development of applications that are easy to assemble, maintain and move around. Containers enable applications to be isolated from each other and the underlying system.<\/span><\/p><p><span style=\"font-weight: 400;\">They also enable portability, since applications don&#8217;t have to be tied to the host operating system. <\/span><b>Containerized applications<\/b><span style=\"font-weight: 400;\">, for example, can be <\/span><b>easily transferred<\/b><span style=\"font-weight: 400;\"> from on-premises systems to cloud environments.<\/span><\/p><p><span style=\"font-weight: 400;\">What&#8217;s more, containerization with Docker enables application stack components to be interchanged. Finally, containers simplify orchestration and scaling.<\/span><\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-2ca97fc e-flex e-con-boxed e-con\" data-id=\"2ca97fc\" data-element_type=\"container\" data-settings=\"{&quot;content_width&quot;:&quot;boxed&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-cba23f9 elementor-widget elementor-widget-heading\" data-id=\"cba23f9\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Who uses Docker?\n<\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8f7ef30 elementor-widget elementor-widget-text-editor\" data-id=\"8f7ef30\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Docker is a tool that benefits <\/span><b>both developers<\/b><span style=\"font-weight: 400;\"> and <\/span><b>system administrators<\/b><span style=\"font-weight: 400;\">. It is often found at the heart of DevOps processes.<\/span><\/p><p><span style=\"font-weight: 400;\">Developers can focus on their code, without having to worry about the system on which it will run. What&#8217;s more, they can save time by<\/span><b> incorporating pre-designed programs<\/b><span style=\"font-weight: 400;\"> into their applications.<\/span><\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-496eaad e-flex e-con-boxed e-con\" data-id=\"496eaad\" data-element_type=\"container\" data-settings=\"{&quot;content_width&quot;:&quot;boxed&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-7cf3696 elementor-widget elementor-widget-heading\" data-id=\"7cf3696\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">How do I learn to use Docker?\n<\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-88fc77b elementor-widget elementor-widget-text-editor\" data-id=\"88fc77b\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Docker is increasingly used for application development. It is now essential to master this containerization platform in the enterprise.<\/span><\/p><p><span style=\"font-weight: 400;\">To learn how to use it and understand all its subtleties, you can turn to a <\/span><a href=\"https:\/\/datascientest.com\/en\/data-engineer-course\"><span style=\"font-weight: 400;\">Data Engineer<\/span><\/a><span style=\"font-weight: 400;\"> or <\/span><a href=\"https:\/\/datascientest.com\/en\/machine-learning-engineer-course\"><span style=\"font-weight: 400;\">Machine Learning Engineer training course<\/span><\/a><span style=\"font-weight: 400;\"> offered by DataScientest.<\/span><\/p><p><span style=\"font-weight: 400;\">Our training courses are available for both companies and individuals and enable you to quickly acquire the skills required for <\/span><b>data engineering<\/b><span style=\"font-weight: 400;\"> or <\/span><a href=\"https:\/\/datascientest.com\/en\/machine-learning-what-is-it-and-why-does-it-change-the-world\"><span style=\"font-weight: 400;\">Machine Learning<\/span><\/a><span style=\"font-weight: 400;\">, including mastery of Docker.<\/span><\/p><p><span style=\"font-weight: 400;\">You can complete the Data Engineer course in <\/span><b>11 weeks in BootCamp<\/b><span style=\"font-weight: 400;\"> mode, or nine months in Continuing Education. Once you&#8217;ve completed the course, you&#8217;ll receive a <\/span><b>Sorbonne University-certified diploma<\/b><span style=\"font-weight: 400;\">, enabling you to put Docker to work for your company.\u00a0<\/span><\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7918876 elementor-align-center button-principal elementor-widget elementor-widget-button\" data-id=\"7918876\" data-element_type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-md\" href=\"https:\/\/datascientest.com\/en\/data-engineer-course\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t<span class=\"elementor-button-text\">Start a Data Engineer training course<\/span>\n\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-cfa2a68 e-flex e-con-boxed e-con\" data-id=\"cfa2a68\" data-element_type=\"container\" data-settings=\"{&quot;content_width&quot;:&quot;boxed&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-2ce2fb9 elementor-widget elementor-widget-html\" data-id=\"2ce2fb9\" data-element_type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<script type=\"application\/ld+json\">\r\n{\r\n  \"@context\": \"https:\/\/schema.org\",\r\n  \"@type\": \"FAQPage\",\r\n  \"mainEntity\": [{\r\n    \"@type\": \"Question\",\r\n    \"name\": \"What is a container?\",\r\n    \"acceptedAnswer\": {\r\n      \"@type\": \"Answer\",\r\n      \"text\": \"Containers and microservices are increasingly being used for application development and deployment. This is known as cloud-native development. In this context, Docker has become a massively exploited solution in the enterprise. Before discovering Docker, you need to understand what a container is. It's a lightweight runtime environment and an alternative to traditional virtualization methods based on virtual machines.\"\r\n    }\r\n  },{\r\n    \"@type\": \"Question\",\r\n    \"name\": \"What is Docker?\",\r\n    \"acceptedAnswer\": {\r\n      \"@type\": \"Answer\",\r\n      \"text\": \"Docker is a container platform launched in 2013 that has greatly contributed to the democratization of containerization. It makes it easy to create containers and container-based applications. There are others, but this is the most widely used. It's also easier to deploy and use than its competitors. It's open-source, secure, and cost-effective. Many individuals and companies are contributing to the development of this project. 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