Docker для windows что это

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Simple to maintain

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Secure from the start

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Эта статья даст вам полное представление о Docker Desktop для пользователей Windows и MAC. Мы изучим установку Docker Desktop на компьютерах с Windows и Mac. После установки мы также попытаемся выполнить некоторые операции Docker.

Docker Desktop — это собственное настольное приложение, разработанное Docker для пользователей Windows и MAC. Это самый простой способ запуска, сборки, отладки и тестирования приложений Dockerized.

Docker Desktop предлагает важные и наиболее полезные функции, такие как быстрые циклы редактирования, уведомления об изменениях файлов, встроенная поддержка корпоративной сети и гибкость для работы с собственным выбором прокси и VPN.

Docker Desktop состоит из инструментов для разработчика, приложения Docker, Kubernetes и синхронизации версий. Он позволяет вам создавать сертифицированные образы и шаблоны языков и инструментов.

Скорость, безопасность и выбор — все, что вам нужно для разработки и доставки контейнерных приложений, доступных на вашем рабочем столе, будет представлено вам.

Прежде чем перейти к процессу установки, давайте разберемся с его версиями.

Версии Docker

Docker в основном поставляется в двух версиях, в Community и ENterprise.

Community версия поставляется с бесплатным набором продуктов Docker. ENterprise корпоративная версия представляет собой сертифицированную контейнерную платформу, которая предоставляет коммерческим пользователям дополнительные функции, такие как безопасность образов, управление образами, оркестровка и управление средой выполнения контейнеров, но по разумной цене.

Мы начнем наше обучение с Community Edition. Контейнеры Docker, работающие в конкретной операционной системе, совместно используют ядро ​​ОС. Это означает, что мы не можем использовать ядро ​​Windows (хост) для запуска контейнеров Linux или наоборот. Чтобы проделать это, у нас есть Docker Desktop для Windows и MAC.

Выпуски Docker Desktop

Docker Desktop выпускается в двух вариантах.

• Stable: как видно из названия, стабильный выпуск тщательно протестирован и может быть использован при разработке более надежных приложений. Его версии полностью синхронизированы с версиями Docker Engine.
• Edge: эти версии состоят из всех новых и экспериментальных функций Docker Engine. Есть больше шансов ошибок, сбоев и проблем, которые могут возникнуть. Тем не менее, пользователи получат возможность ознакомиться с предстоящими функциями.

Docker на Windows

Есть два варианта Docker на Windows.

1. Использование Docker Toolbox

Docker Toolbox предоставляет набор легких инструментов.

• Oracle virtual box
• Docker Engine
• Docker Machine
• Docker compose
• Kitematic GUI

Вышеуказанные инструменты устраняют необходимость развертывания отдельной виртуальной машины для запуска Docker. Просто установите исполняемый файл панели инструментов Docker непосредственно в Windows и начните разработку приложений. Требуется 64-битная ОС и Windows 7 или выше с включенным режимом виртуализации.

Но опять же, панель инструментов Docker — это оригинальная поддержка, предоставляемая в Windows для запуска Docker и его устаревшего решения для всех ОС Windows, которые не соответствуют требуемой конфигурации.

2. Использование Docker Desktop

Docker Desktop — это новейшая технология, используемая для Docker в Windows. Он заменяет виртуальную машину Oracle собственной технологией виртуализации, доступной в Windows, то есть Microsoft Hyper-V.

Он по-прежнему будет запускать Docker на Linux-машине, созданной под ним. Но на этот раз вместо виртуальной машины Oracle мы использовали нативный Microsoft Hyper-V.

Установка Docker на Windows

Вы можете скачать репозиторий Docker Desktop из Docker Hub.

истемные требования:

• Windows 10 или Windows Server 2016 Professional или Enterprise Edition
• Поддержка Hyper-V.

Чтобы запустить Hyper-V, оборудование должно соответствовать следующим требованиям:

• 64-битный процессор
• > = 4 ГБ ОЗУ
• Поддержка виртуализации оборудования на уровне BIOS

Следовательно, программная и аппаратная зависимость заключается в запуске Docker Desktop на Windows.

Установка Docker на macOS

Вы можете скачать репозиторий Docker Desktop из Docker Hub.  

Системные требования:

• MAC Hardware 2010 или новее с аппаратной поддержкой управления памятью и неограниченным режимом. Выполните команду kern.hv_support, чтобы проверить, поддерживает ли оборудование MAC инфраструктуру гипервизора.
• MAC OS версии 10.13 или новее.
• > = 4 ГБ ОЗУ
• Virtual-Box до версии 4.3.30

Работа с образами

После установки проверьте версию установленного Docker Engine.

docker --version

Docker работает с доставкой и запуском контейнерных приложений. Вам либо нужно создать свое собственное контейнерное приложение, либо Docker поддерживает контейнерные образы в Docker Hub, и его можно легко загрузить с помощью простой команды docker run.

Здесь мы будем тянуть образ Redis.

docker pull redis

С помощью простой команды run образы можно скачивать и загружать на GitHub или Docker Hub, и любой пользователь во всем мире может получить к нему доступ и начать работать с ним.

Docker Container запускает образ Docker. Следующим шагом является запуск контейнера.

docker run -p 6379 Redis

Будет создан зашифрованный идентификатор контейнера. Вы можете быстро проверить состояние работающего экземпляра в Docker, нажав на Dashboard option.

Обязательно остановите контейнер, прежде чем удалять его из Docker Engine.

Возможности Docker Desktop

Существует множество преимуществ:

• Поддерживает широкий спектр инструментов разработки.
• Обеспечьте быстрый и оптимизированный способ создания и публикации контейнерного образа на любой облачной платформе.
• Простота установки и настройки полной среды Docker
• Повышение производительности благодаря встроенной виртуализации Hyper-V для Windows и HyperKit для MAC.
• Возможность работать в Linux через WSL 2 на компьютерах с Windows.
• Легкий доступ к работающим контейнерам в локальной сети.
• Возможность поделиться любым приложением на облачной платформе, на разных языках и в разных средах.
• Для обеспечения безопасности и актуальности выполняются автоматические обновления.
• Включены последние версии Kubernetes.
• Возможность переключения между Linux и Windows сервером на Windows.

Docker Desktop — это нативное приложение, разработанное на Windows и MAC OS для запуска, сборки и доставки контейнерных приложений или сервисов.

Однако

Docker Desktop предназначен не для производственной среды, а для рабочего стола и среды разработки.

Также рекомендуем прочитать:

1. Docker для начинающих — технология контейнеров
2. В чем разница между Docker и Kubernetes?
3. Введение в Docker Hub и все, что вы должны знать о нем
4. Как установить Docker на Ubuntu, Windows, Debian и CentOS?
5. Kubernetes — Введение для начинающих
6. Docker посмотреть запущенные контейнеры, запустить или остановить контейнеры

If you’re looking for simple and painless software deployment, Docker is the right tool for you. It is the best containerization platform and in this blog on Docker for Windows we’ll specifically focus on how Docker works on Windows.

To get in-depth knowledge on Docker, you can enroll for live DevOps Certification Training by Edureka with 24/7 support and lifetime access.

I’ll be covering the following topics in this blog:

1. Why use Docker For Windows?
2. Docker for Windows prerequisites 
3. Components installed with Docker 
4. What is Docker?
5. Docker Terminologies
6. Hands-On

Why use Docker for Windows?

Why use Docker for Windows – Docker for Windows

• Avoids the work on my machine but doesn’t work on production problem: This problem occurs due to the inconsistent environment throughout the software development workflow. With Docker you can run an application within a container which contains all the dependencies of the application and the container can be run throughout the software development cycle. This practice provides a consistent environment throughout the software development life cycle
• Improves productivity: By installing Docker on windows we’re running Docker natively. If you’ve been following Docker for a while, you know that Docker containers originally supported only Linux operating systems. But thanks to the recent release, Docker can now natively run on windows, which means that Linux support is not needed, instead the  Docker container will run on the windows kernel itself
• Supports native networking: Not only the Docker container, the entire Docker tool set is now compatible with windows. This includes the Docker CLI (client), Docker compose, data volumes and all the other building blocks for Dockerizied infrastructure are now compatible with windows. But how is this advantageous? Since all the Docker components are locally compatible with windows, they can now run with minimal computational overhead.

  You can get a better understanding with this Online Docker Training Course.

Docker For Windows Prerequisites

Docker for Windows – Prerequisites

The following requirements need to be met before installing Docker on windows:

1. Check if you’re using Windows 10, either pro edition or enterprise edition, 64-bit system. Docker will not run on any other windows version. So if you’re running on an older windows version, you can install the Docker toolbox instead. 
2. Docker for windows requires a Type-1 hypervisor and in the case of windows, it’s called the Hyper-V. Hyper-V is basically a lightweight virtualization solution build on top of the hypervisor framework. So you don’t need a virtual box, you just have to enable the hypervisor.
3. And also you need to enable the virtualization in BIOS. Now when you install Docker for windows, by default of this is enabled. But in case you’re facing any issue during installation, please check if your Hyper-V and virtualization is enabled.

Components Installed With Docker

Components installed with Docker – Docker for Windows

1. Docker Engine: When we say Docker, we actually mean Docker engine. The Docker engine contains the Docker daemon, REST API for interacting with the Docker daemon and a command line interface client that communicates with the daemon. Docker daemon accepts Docker commands such as Docker run, Docker build, etc, from the Docker client.
2. Docker Compose: Docker compose is used to run multiple Docker containers at once by using a single command, which is docker-compose up.
3. Docker Machine: Docker machine is used to install Docker engine. It is basically what you install on your local system. The Docker machine has it’s own CLI client known as the Docker machine and a Docker engine client called Docker.
4. Kitematic: Kitematic is an open source project built to simplify the use of Docker on Windows. It helps to automate the installation of Docker and it provides a very interactive user interface for running Docker containers.

If you want to learn more about Docker for Windows, check out this video by our DevOps experts.

What Is Docker?

Docker is a containerization platform that runs applications within containers called Docker containers. Docker containers are light weighted when compared to virtual machines. When you install a Virtual machine on your system, it uses the guest operating system on top of your host operating system.  This obviously takes up a lot of resources like disk space, RAM, etc. On the other hand, Docker containers make use of the host operating system itself.

What is Docker – Docker for Windows

In the above image, you can see that, there’s a host operating system on top of which the Docker engine is mounted. The Docker engine runs container #1 and container #2. Both of these containers have different applications and each application has its own libraries and packages installed within the container.

I hope you have a good idea about what Docker is if you still have doubts check out this blog to learn more!

Let’s discuss some Docker terminologies now:

• Docker Images

Docker images are read-only templates to build Docker images. Docker images are created from a file called Dockerfile. Within the Dockerfile, you define all the dependencies and packages that are needed by your application.

• Docker Containers

Every time you run a Docker image, it runs as a Docker container. Therefore, a Docker container is the run time instance of a Docker image.

• Docker’s Registry

Docker’s registry, known as DockerHub is used to store Docker images. These images can be pulled from the remote server and can be run locally. DockerHub allows you to have Public/Private repositories.

• Docker Swarm

Docker swarm is a technique to create and maintain a cluster of Docker engines. A cluster of Docker engines comprises of multiple Docker engines connected to each other, forming a network. This network of Docker engines is called a Docker swarm. A Docker manager initiates the whole swarm and the other Docker nodes have services running on them. The main goal of the Docker manager is to make sure that the applications or services are running effectively on these Docker nodes.

• Docker Compose

Docker compose is used to run multiple containers at once. Let’s say that you have 3 applications in 3 different containers and you want to execute them at once. This is where Docker compose comes in, you can run multiple applications in different containers at once, with a single command, which is docker-compose up.

Hands-On

We’ll begin our demo by installing Docker for windows. But before we do that, check if you’ve met the prerequisites.

One more thing to note is since Docker for Windows requires Microsoft’s Hyper-V and once it’s enabled, VirtualBox will no longer be able to run virtual machines. So you can’t run Docker for Windows and a VirtualBox on the same system, side by side.

Install Docker On Windows:

1. Download Docker for Windows installer from the official website
2. Double-click on the installer to run it
3. Go through the Install Wizard, accept the license and proceed with the install
4. After installation, open the Docker for Windows app and wait till the whale icon on the status bar becomes stable
5. Open up any terminal like Windows PowerShell and start running Docker

Installation – Docker for Windows

Enough of theory, let’s get our hands dirty and create a simple Python web application by using Docker Compose. This application uses the Flask framework and maintains a hit counter on Redis.

Flask is a web development framework, written in Python and Redis is an in-memory storage component, used as a database. You don’t have to install Python or Redis, we’re simply going to use Docker images for Python and Redis.

In this demo we’re going to use Docker compose to run two services, namely:

1. Web service
2. Redis service.

What does the application do? It maintains a hit counter every time you access a web page. So each time you access the website the hit counter gets incremented. It’s simple logic, just increment the value of the hit counter when the web page is accessed.

For this demo, you’ll need to create four files:

1. Python file
2. Requirements.txt
3. Dockerfile
4. Docker compose file

Below is the Python file (webapp.py) that creates an application by using the Flask framework and it maintains a hit counter on Redis. 

import time
import redis
from flask import Flask
app = Flask(__name__)
cache = redis.Redis(host='redis', port=6379)
def get_hit_count():
retries = 5
while True:
try:
return cache.incr('hits')
except redis.exceptions.ConnectionError as exc:
if retries == 0:
raise exc
retries -= 1
time.sleep(0.5)
@app.route('/')
def hello():
count = get_hit_count()
return 'Hello World! I have been seen {} times.
'.format(count)
if __name__ == "__main__":
app.run(host="0.0.0.0", debug=True)

The requirements.txt file has the name of the two dependencies, i.e. Flask and Redis that we’ll be installing in the Dockerfile.

flask
redis

The Dockerfile is used to create Docker images. Here, I’m installing python and the requirements mentioned in the requirements.txt file.

 
FROM python:3.4-alpine 
ADD . /code 
WORKDIR /code 
RUN pip install -r requirements.txt 
CMD ["python", "webapp.py"] 

The Docker compose file or the YAML file contains two services:

1. Web service: Builds the Dockerfile in the current directory
2. Redis service: Pulls a Redis image from DockerHub

version: '3'
services:
web:
build: .
ports:
- "5000:5000"
redis:
image: "redis:alpine"

You can now run these two services or containers by using the following command:

docker-compose up

To view the output you can use Kitematic. To open Kitematic, right click on the whale icon on the status bar.

Kitematic – Docker for Windows

On the top left-hand corner, you can see the two services running. 

Kitematic – Docker for Windows

This is what the output looks like. When you refresh the page, the hit count gets incremented.  

Output – Docker for Windows

With this, we come to the end of this blog. I hope you have a better understanding of how Docker works on Windows. Stay tuned for more blogs on the most trending technologies.

If you found this Docker for Windows blog relevant, check out the DevOps training by Edureka, a trusted online learning company with a network of more than 450,000 satisfied learners spread across the globe. The Edureka DevOps Certification Training course helps learners gain expertise in various DevOps processes and tools such as Puppet, Jenkins, Docker, Nagios, Ansible, and GIT for automating multiple steps in SDLC.

What is Docker Desktop & How Does it Work?

It is often imperative to first understand the history behind any tools and tech to understand from where it came and why it was created even in the first place. So to get into history, Docker first saw its light in 2011 in France when Solomon Hykes envisioned building platform-independent mechanisms to deploy all your development binaries in such a way that all the libraries, os level dependencies, and codes can be deployed on any cloud or system giving the developer confidence that their software will function as expected without any rework and hiccups.

The core reason for docker container conceptualization was to make a developer’s life easy. Setting up a working environment configuration to support different software versions on any given machine was a big issue. But with docker, you just need to create an isolated package comprising of all the configurations (called docker container) supporting different versions, and each container here holds a separate isolated environment configuration that doesn’t impact the OS level configs or any other running container active on your machine.

Now that we have some basic idea of why docker was started and created, it’s a high time we define a few components to establish docker as a concept. So the first thing is to define Docker. Know more about devops skills that a devops engineer should master. 

What is Docker?

Docker is like that huge Cargo Ship loaded with big boxes (unique containers to be pulled by the tagged owners) that offers developers a Software platform that allows them to build, test, and deploy applications quickly. Docker packages software into standardized units called containers that have everything the software needs to run including libraries, system tools, code, and runtime.

Docker provides the ability to package and run an application in a loosely isolated environment called a container. The isolation and security allow you to run many containers simultaneously on a given host. 

To further understand the magic of docker we need to decode the Docker architecture as it lays down clearly how each component of the Docker system interacts with the others.

Docker Architecture

Fig 1- Docker Architecture

Docker has three major components:  

• Client 
• Docker Host
• Registry

Let’s dig deeper into each one of these, one by one. First and foremost we need to understand the docker daemon.

If you want to know more about docker and get a practical sense of it, you can explore our dedicated docker online course. 

What Is Docker Deamon?

It is a kind of persistent thread that runs in the background in order to manage the Docker containers on a single host. 

Docker daemon also known as dockerd, runs on the host operating system acting like a runtime that takes care of docker objects like 

• Docker images 
• Docker containers 
• Networks and  
• Storage 

Now that you know the basics of docker daemons let’s understand the first key component of Docker architecture

Docker Client

As it is seen, in Fig 1, the docker client is like your local machine where all the necessary client operations are performed by the users. This client gives developers a primary interface (CLI) to interact with the Docker server (daemons) using the pre-defined set of commands

Its main objective is to provide a medium to direct the pull of images from a registry and to have it run on a Docker host. Common commands issued by a docker client are: 

$ docker build 
$ docker pull 
$ docker run 

Docker client uses these commands and REST APIs to interact with Docker daemon which also is a Server. Do you know that the Docker client can communicate with more than one daemon?

Docker Host

It is a complete hosting environment that holds docker daemon, containers, images, networks, and storage that is required by developers to execute and run any given applications

Docker Registry

The primary role of the docker registry is to store docker images. These image repositories can be either public or private. The popular public registry is the Docker hub.

So whenever you as a developer are looking to pull one of the docker images using the docker pull command, the required images are pulled from your publicly configured registry (like docker hub). Similarly, when you use the docker push command, your image is pushed to your configured registry. 

Before we wrap up the docker fundamentals we also need to touch upon the docker objects.

Docker Objects

You can’t fully understand Docker without understanding the underlying docker objects. Some of the key objects are

• Docker Images
• Docker Containers 

Docker Images

Being a developer you would have for sure came across a situation where the development you have done locally on your PC/Laptop requires you to configure your editor, OS dependencies, libraries, environment variables, etc to package and run your code binary. But if your system breaks down due to some reason and you are asked to move to a new PC/Laptop, that old code binary struggles to run as expected on it.

But in the current time, this is not the case thanks to Docker and a docker objects called Image.

Docker image

It is nothing but a read-only template that has all the instructions required to create a docker container(another object which we will cover next). These images use as a private container registry to share container images either publicly or privately. Every packed image in the container is meta-tagged to explain the container’s ability.

These images are at the core of the Docker ecosystem, as they foster team collaboration and speedy development and deployment. The kind of experience it brings is simply commendable and that’s why Docker images and their underlying utility are so popular in the developer and tech fraternity.

Dockerfile

Being a developer, you may simply use docker images created by someone and shared publicly or maybe want to create a custom image to be used within the organization. While creating a custom image you rely on the concept of Dockerfile which defines a simple syntax comprising the steps needed to create the image and deploy it on Docker hub/ AWS ECR repo.

Dockerfile has all the instructions which are created as a separate layer in the docker image, so whenever you update the docker images only those layers which have changed are rebuilt. This is the reason which makes docker images so lightweight, tiny, and quick as compared to the older concept of virtualization 

Docker Containers

Now that we know the basics of docker images it’s time to decode another key docker object called Containers.

Containers are nothing but the runnable instance of a docker image. 

Runnable is an interface that is to be implemented by a class whose instances are intended to be executed by a thread. 

These containers can be

• Created 
• Started 
• Stopped 
• Moved 
• Deleted

All by the use of Docker CLI/API.

Containers are isolated pieces that can be plugged into one or more networks and also allow storage to be associated with it. Each container that are hosted in Docker Host is unique and is defined by the images it holds as well as by the configs. 

Do you know?  

When a container is deleted, all the changes to its state that are not stored in persistent storage vanishes. 

With this, we have covered all the fundamentals one should before knowing Docker Desktop. So let’s start defining. But before that, get to know more about how to become a devops engineer. 

What Is Docker Desktop?

As we have understood so far that docker objects like images and containers are key building blocks, it is also imperative to know that these objects are generally dockerized, and here the role of Docker Desktop comes into the picture.

Docker desktop is the fastest way to containerize/dockerize applications. It is a native application designed by Docker for both Windows and MAC users. 

Why Docker Desktop?

Docker desktop that is built on top of the Docker engine is a perfect tool for developers that are looking to leverage the Docker ecosystem and get started quickly to dockerize and deploy their apps. It is a powerful tool that packages Docker’s CLI, Docker Compose, Kubernetes, and other tools to Fastrack application development.

It is easy to install and OS independent and comes up with these key features that make it stand out amongst others 

Top Features that Makes Docker Desktop Special

• Simple and easy-to-install providing an environment to build, ship, and run your containers 
• Storage volumes are easily mapped and managed
• Supports both Local and remote management of Docker images 
• Facilitates collaborations amongst developers where they can share repeatable and reproducible development from their local machine to the docker container 
• Easy to get started with Kubernetes on your local machine with Docker Desktop.
• Provides a simple dashboard to help developers get an overview of running containers, images, and volumes 
• Tailor-made to support multi-architecture images 

Now that we have got enough reason to use the Docker desktop it’s time to get decode how one can install it and get started.

Getting Started With Docker Desktop for Windows & Mac

Before we kickstart this phase its important to understand a few things

What are a few things to know?  

• Docker desktop supports both Windows and MAC systems.
• One should use a community open source edition to get started with Docker desktop
• Also, there is a commercial edition that is suitable for enterprises and a large team
• Commercial use of Docker Desktop in larger enterprises (more than 250 employees OR more than $10 million USD in annual revenue) now requires a paid subscription. 

Installing Docker Desktop On Mac

Docker desktop comes with two versions for mac

• One for MAC with Intel Chip
• One For MAC with its own indigenous Apple chip

Pre-requisites Of MAC — Intel Chips :  

• macOS must be version 10.15 or newer. That is, Catalina, Big Sur, or Monterey.
• Run the command kern.hv_support to verify if MAC hardware supports the Hypervisor framework 
• If you experience any issues after upgrading your macOS to version 10.15, you must install the latest version of Docker Desktop to be compatible with this version of macOS. 
• At least 4 GB of RAM. 
• VirtualBox prior to version 4.3.30 must not be installed as it is not compatible with Docker Desktop 

Installing Docker Desktop On MAC — Intel Chip:  

The best way is to visit

Install Docker Desktop on Mac 

Estimated reading time: 7 minutes Update to the Docker Desktop terms Commercial use of Docker Desktop in larger…docs.docker.com 

And download the latest Docker installation file from there, you will get the options as depicted below.

Click for the intel version and wait till the docker .dmg file is downloaded. Once done just click the file and the rest will be an easy cakewalk as the wizard will be there to guide you. You must read and agree on the SLA which will be popping on your MAC to proceed.

Similarly, you can install docker desktop on your MAC with an Apple silicon chip

Pre-requisites Of MAC — Intel Chips : 

• It is recommended that you download the latest Docker Desktop version. With version 4.3.0, the hard requirement to install Rosetta 2 is no more required but still, to get the best-uninterrupted experience, it is wise that you install Rosetta 2.
• One can install Rosetta 2 manually from the CLI, using the following command: 

$softwareupdate --install-rosetta 

Installing Docker Desktop On MAC — Apple Silicon Chip: 

The process through guided wizard remains the same. Download the .dmg file for the Apple silicon version and the rest you can easily set up using Wizard after you have given your consent against the SLA.

Installing on MAC using CLI: (for both chip types it works ) 

Once you have downloaded the preferred .dmg file considering your MAC machine chip type (Intel/Apple silicon) you can easily install the docker desktop via CLI commands as shown below.

You need to type these commands on your mac terminal

$ sudo hdiutil attach Docker.dmg 
$ sudo /Volumes/Docker/Docker.app/Contents/MacOS/install 
$ sudo hdiutil detach /Volumes/Docker 

What is hdiutil? 

hdiutil is a command-line utility in macOS to Manipulate disk images (attach, verify, burn, etc). 

$ sudo /Volumes/Docker/Docker.app/Contents/MacOS/install 

Here install command accepts the following arguments — 

• —accept-license: accepts the Docker Subscription Service Agreement(SLA) now, rather than requiring it to be accepted when the application is first run 
• —allowed-org=<org name>: requires the user to sign in and be part of the specified Docker Hub organization when running the application 

If you are done installing, you may be able to open it by visiting your launchpad and clicking on the docker icon

Once you click, you can see the docker fav menu icon on the extreme top right of your MAC as seen in the image below, in my case you can see a first small icon that starts to animate and you will see the docker desktop dashboard as shown below.

It will show you the current docker images, volumes attached, and the environment info. This means you are now successfully running Docker Desktop. You can click the docker fav menu icon to see Preferences and other options. 

Installing Docker Desktop On Windows

Visit this official docker link — 

Install Docker Desktop on Windows 

Update to the Docker Desktop terms Commercial use of Docker Desktop in larger enterprises (more than 250 employees OR…docs.docker.com 

And select the option as shown below-

Pre-requisite:  

You should take care of the following before installing docker desktop on your windows machine:

• Windows 11 64-bit: Home or Pro version 21H2 or higher, or Enterprise or Education version 21H2 or higher. 
• Windows 10 64-bit: Home or Pro 21H1 (build 19043) or higher, or Enterprise or Education 20H2 (build 19042) or higher. 
• Enable the WSL 2 feature on Windows. For detailed instructions, refer to the Microsoft documentation. 

Windows Subsystem for Linux is a compatibility layer for running Linux binary executables natively on Windows 10, Windows 11, and Windows Server 2019. In May 2019, WSL 2 was announced, introducing important changes such as a real Linux kernel, through a subset of Hyper-V features 

• The following hardware prerequisites are required to successfully run WSL 2 on Windows 10 or Windows 11: 
• 64-bit processor with Second Level Address Translation (SLAT) 
• 4GB system RAM 
• Hyper-V and Containers Windows features must be enabled.(only if you want Hyper-V option instead of WSL 2) 
• BIOS-level hardware virtualization support must be enabled in the BIOS settings. For more information, see Virtualization. 
• Download and install the Linux kernel update package. 

Installing Docker Desktop On Windows Using Wizard:  

1. Double-click Docker Desktop Installer.exe that you downloaded as per the instructions we have covered above in order to run the installer. 
2. When asked, ensure WSL 2 instead of Hyper-V option on the Configuration page is selected. It depends on your choice of backend. 
3. Note in case your PC only supports one of the two options, you will not be able to select which backend to use 
4. Follow the given instructions on the installation wizard to authorize the installer and complete the installation 
5. When the installation is done, click Close to complete the installation process. 

Note! 

If your admin account is different from your user account, you must add the user to the docker-users group.

• Run Computer Management as an administrator and navigate to Local Users and Groups > Groups > docker-users. Right-click to add the user to the group. Log out and log back in for the changes to take effect. 

Installing from the CLI:  

Please ensure Docker Desktop Installer.exe is available locally on your machine. If yes, then type the following command in a terminal. Make sure you are in the root folder where the installer file exists.

«Docker Desktop Installer.exe» install 

In case you use PowerShell you should type 

Start-Process ‘.\win\build\Docker Desktop Installer.exe’ -Wait install 

The install command accepts the following arguments : 

• —quiet: suppresses information output when running the installer 
• —accept-license: accepts the Docker Subscription Service Agreement now, rather than requiring it to be accepted when the application is first run 
• —allowed-org=<org name>: requires the user to sign in and be part of the specified Docker Hub organization when running the application 
• —backend=<backend name>: selects the backend to use for Docker Desktop, hyper-v or wsl-2 (default) 

Note! 

In case your admin account is different from your user account, you must add the user to the docker-users group: 

net localgroup docker-users <user> /add 

Now that the installation process has been completed, its time to validate the same 

Start the Docker On Your Machine :  

Start Docker Desktop

To start Docker Desktop 

1. Search for Docker, and select the Docker Desktop menu option in the search results. 
2. Accepts the SLA terms & conditions

Note! 

If you do not agree to the updated terms, the Docker Desktop application will close and you can no longer run Docker Desktop on your machine. You can choose to accept the terms at a later date by opening Docker Desktop. 

3. When the initialization is complete, you can see Quick Start Guide UI as seen in the image below

You can skip it for the time being and move forward. You will be able to view the docker dahsboard. This shows you have successfully installed the docker desktop!.

If you want to install docker desktop on the Linux system, you can easily do so by following the instructions given in the below-given link.

Here is the installation link —  

Install Docker Desktop on Linux 

Welcome to Docker Desktop for Linux. This page contains information about system requirements, download URLs, and…docs.docker.com 

Docker Desktop release notes:  

When you are installing Docker desktop fresh or want to update, do keep a close eye on these release notes that are frequently updated and shared on Docker’s official web portal. Here is the link-

Docker Desktop release notes 

Estimated reading time: 31 minutes This page contains information about the new features, improvements, known issues…docs.docker.com 

This comprises the new features, improvements, known issues, and bug fixes in Docker Desktop releases. 

Quick Workshop To Get You Started

Now that we are done with the installation it’s time to play with the docker desktop. We will learn in this demo a few of the docker commands like

• docker run 
• docker push  
• docker pull 
• docker build  

We will see the pushed docker image in our docker hub public repo. So before we start please sign in to your docker desktop, you need to have an account with docker hub, if not please visit here- 

Docker Hub Container Image Library | App Containerization 

Edit descriptionhub.docker.com 

Firstly, signup. Once you have created the account go to the docker desktop icon and sign-up with the same. Once you signup you will see the below-given screen

1. Docker Run: 

Open your terminal and type this command-

$ docker run hello-world 

When you type there may be a high probability that the image with this name would not be present locally, but don’t worry docker understands this as a default thing so it will look for the docker image with this name in their docker hub public repo and will take a pull to download the same as shown in the image below.

Output:  

You can clearly see that the docker run command looked for the image and as it didn’t find the same, took the pull from the hub.

So now when you again run the docker run command you will see that it responded with the message — 

“Hello from the Docker!” 

2.  Listing all docker images : 

When you key in this command you can see the list of the Docker images that exist in your local system, which can also be seen in your docker desktop dashboard, here is how it looks in my docker dashboard.

3.  Docker ps command: 

The ‘docker ps’ is a Docker command to list the running containers by default 

$ docker ps 

When typed this command this, you can see in the output none of container images are in a running state

But if you want to list all the containers, including stopped once? We can do that by adding —all option. 

$ docker ps - all 

I have created on the image, docker/getting-started, let’s see if it is running state or not

If we type docker ps again let’s see what happens 

$ docker ps 

Now you can see that our latest pulled image docker/getting-started is in a running state.

4. Docker stop command: 

To stop a container, use the docker stop command with either the container id or container name. We may stop a container if we want to change our docker run command. 

Here we will stop our docker/getting-started container whose id is “6fa658d60902” 

$docker stop 6fa658d60902 

Now when we run the ps command after running docker stop, we can see that now our docker/getting-started has stopped.

5. Docker restart Command: 

As can be seen from the above image, after we ran the docker restart command using the command- 

$docker stop 6fa658d60902 

and again typed docker ps command we get our docker/getting-started container up and running again stopped. 

6. Docker Push Command: 

If you want to push your Docker image to any public repository like the docker hub, you can use the docker push command.

Let’s create a public repo in the docker hub. So go to docker and sign-in

Once you give a repo name and click a create button, you will see the following output UI

Our repo with name pramdemo/demorepo is created, also, the command which will be required to push to this new repo is given on the right side-

“docker push pramdemo/demorepo:tagname” 

Let’s see how we can push our locally existing docker images to this docker hub repo now.

When you type

$docker push pramdemo/demorepo 

it will flag an error because no such image exists with the tag pramdemo/demorepo 

Let’s tag our local image docker/getting-started and try to push the same to the docker hub repo 

$ docker tag docker/getting-started pramdemo/demorepo 

Now that we have the tagged image ready let’s try to push the same

$ docker push pramdemo/demorepo 

woohoo! the image got pushed, let. check the same in our docker hub repo 

You can see in the docker hub tag section the image got pushed.

This way you can code all your app create a docker image using dockerfile, and push the same to the docker hub publicly or privately. Once this is done your image will be ready to be pulled by any CI/CD pipeline or by any of your team members.

6. Docker Pull Command: 

Now that your image is pushed in your docker hub repo you can anytime take a pull of the same in your local machine and get started. let’s see how it works.

If you carefully see the pushed image you will also get a pull command that one can use to take a pull. In this case the command is

$ docker pull pramdemo/demorepo:latest 

the output:  

We can see from the CLI output our latest image got pulled successfully.

7. Docker remove Command:

If you wanna get rid of unwanted images from your repo you can do so by command 

docker rmi it removes images by their ID. 

To remove the image, you first need to list all the images to get the Image IDs, Image names, and other details. 

Let’s get the image id of docker/getting-started  

We can see that docker/getting-started has the image id 157095baba98 

So if we type

$ docker rmi 157095baba98 

Output:

We got an error as one of the containers is running which is using this image, so we need to first stop the container or we can also enforce the deletion by using -f flag, let’s do the same and see the outcome 

$docker rmi 157095baba98 -f 

output:  

We can see that our image docker/getting-started that had the image id 157095baba98 got deleted. When we typed the command

we can see that the all the images with the ID 157095baba98 got removed 

Takeaways

We have comprehensively covered the docker and docker desktop journey and can see how magical this tool is. We learned the fundamentals of

• Docker 
• Docker objects 
• Docker architecture
• What & Why of Docker Desktop tool 
• Installation of Docker on Windows and MAC systems 

Then we ran through a quick demo workshop to see a few of the popular docker commands in action.

So what we learned from this, well here are a few key learnings as a takeaway

• Docker is a go-to tool for any big enterprises or small startups to ensure they are building, running, testing, and shipping their binaries fast
• If you are looking for a smart collaboration tool for development docker has to be a part of your arsenal to scale those efforts, especially when you are looking to implement micro-services as a part of your DevOps culture 

To learn more about DevOps you can check one of the best courses for DevOps 

• Docker supports docker-compose & Kubernetes which helps you to orchestrate your containerized apps and deploy them to the K8S cluster at scale.

Want to learn more about Docker and Kubernetes, you can subscribe to this exclusive course called docker and kubernetes online training.