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Docker for Windows: what and how to use?

If you are interested in software development, ie creating applications for operating systems, you may have heard of Docker for Windows, a highly improved new implementation of the relatively old service that uses it. name, the Docker.

This service essentially allows the user to create containers with various application information and codes to make it easy to deploy and operate on different operating systems in a very simple way.

1. What Docker for Windows?

Simply put, Docker allows software developers to more easily deploy portability tools in the applications they create or write.

It is an open source software project, which is to make sure that it is safe as your entire code is openly available to anyone who wants to see to check for any irregularities. In addition, it can be changed by the user after downloading, without any problem, copyright that allows its change.

Docker for Windows is a platform developed in the Go language, created by Google; It is a very high performance software that ensures very easy development and administration of isolated environments, which ensures that the application reaches the end user very quickly.

What ?

It is intended to create, test and deploy programs in a separate environment, other than the machine or the original device; This environment is called “container”.

Thus, the developer can package the software in a more standardized way, which is only because the platform offers several basic execution functions.

Environments, or containers, can be run either externally, by cloud, or internally, locally on the machine itself, to perform tests or the like.

Docker, besides being the name of the program that allows it all, is also the name of the software developer, which has contributions from several other major technology companies, such as Google, Microsoft and IBM.

2. How to install Docker for Windows?

If you develop programs and are interested in a way to get your applications to the end user more simply, it's a great idea to consider using Docker to do this. Therefore, we will instruct you how to install this excellent platform on your computer.

First of all, it has some basic requirements that are necessary to start the installation process. First, you can't unfortunately have an issue Home You need one of the following editions: Pro, Enterprise, or Education, 15063 or higher.

In addition, installing Docker for Windows also requires that both the "hyper-v" feature and the Windows container tools be enabled. If you do not know how to do this, just follow the steps below.

There are several ways to enable these tools; The first is through Windows PowerShell: To do so, open this tool in administrator mode and then run the following commands:

Enable-WindowsOptionalFeature -Online -FeatureName Microsoft-Hyper-V -All

Enable-WindowsOptionalFeature -Online -FeatureName containers All

Install Docker for Windows Powershell

If a message appears stating that the command cannot be found, make sure it is running in administrator mode. Then do not forget to restart your computer.

The second using Command Prompt (CMD) in conjunction with DISM, a tool that helps you configure both Windows and operating system images. Then simply open CMD or PowerShell as an administrator and execute the commands

DISM / Online / Enable-Feature / All / FeatureName: Microsoft-Hyper-Vand

DISM / Online / Enable-Feature / FeatureName: Containers.

Install Docker for Windows dism

The third, and last, through Windows settings: first, right-click the Windows icon on the taskbar and click“Apps and Features”; then click"Programs and resources", right; comes“Enable or Disable Windows Features ”, selectHyper-V andContainers and click ok.

Install Docker for Windows Settings

For error-free execution of Docker for Windows, the following hardware requirements are also required: a 64bit processor with SLAT support (like all i3, i5, i7 and i9, among others), 4GB of RAM, and virtualization support enabled on BIOS.

To check if your CPU supports this tool, just download the “coreinfo” tool at this link, extract it, open a command prompt as an administrator, go to the folder where you extracted it using the “CD” command and typing in the location and then type command coreinfo -v.

A short list of information will appear, among whichEPT if you use an Intel processor orNPT from AMD. Beside this section, have an asterisk “*” if your processor has SLAT, or a minus “-” if no.

Find out if you have SLAT

To enable virtualization in the BIOS, your computer must be turned off. Then click the power button and click the button to go to your BIOS, which usually Delete. Go into the processor settings and enable it“Intel Virtualization Technology“ or“AMD-V”depending on the manufacturer.

BIOS options may be under different names, depending on the manufacturer of your motherboard or notebook. In this case, search for the specific model. Then just click on Save & exit.

Now that all this is done, you can finally install Docker for Windows on your computer. To download the application, follow the link. After downloading, open the installer and follow the installation instructions, accepting the user license. When you're done, just clickFinish that he be installed.

This Docker for Windows installer contains several tools. These are aDocker Engine, the Docker CLI client, Docker Compose, Docker Machine, and Kitematic. Containers and images created by Docker are shared among all machines that have the application installed, logged in.

To verify that the installation was successful, you can perform a simple check through the command prompt or PowerShell. Open it and enter the following command: docker run hello-world.

window docker hello world

3. How does it work?

Now that the Docker for Windows tool is already installed on your computer, let's talk about its full capabilities, what it does, and how to get the most out of the platform in question.

The vast majority of large and mid-sized companies use applications such as ERPs and CRMs, which are software suites, to perform the functions of this platform. The problem with this lies in the fact that because they have a single source code and advertising they become inefficient in the long run.

docker architecture for windows

For this, came the tool called docker, which solves the problem through several steps; The first one is the decomposition of the program into several microservices, which are smaller parts, which allows developers to implement a more architecture suitable for the operation.

This is only possible because the source code is specific to each of the microservices, which allows software to go through more than one stage, such as test, virtual, and production environments. In each of them, the performance must be consistent, which is allowed by the container, which packages the components in a lightweight file, which allows good execution in any environment.

Docker for Windows, in turn, communicates via the API between the client and the server; For this to happen, the service must be installed on site and point the client to the right server.

It uses the kernel, or core, of Linux and its features like "Cgroups" and "namespaces" to segregate processes, allowing them to run completely independently, which is the main purpose of containers, ensuring the possibility that multiple processes and programs run separately and utilize the best possible infrastructure while providing high security.

Tools of this type, including this one, use a different image-based deployment type, which makes it easy to share applications and their dependencies in different environments. They also serve to automate the deployment of applications or the processes that form them in the environment.

A small restriction of this service is that Windows software images can be run on Windows hosts itself, while Linux images can be run on both Linux and Windows hosts. Host, in this case, a server or VM, virtual machine.

The technology that docker uses for containers is quite different from traditional Linux containers, even though its initial development was based on LXC. He has distanced himself from it nowadays, since LXC is only useful for lighter virtualizations, but his experience was quite poor.

docker containers for windows

Docker for Windows offers, in addition to the ability to execute containers, greater ease in creating and building them, sending and versioning images, and many other tools.

In standard Linux containers, applications run entirely as one due to the init system used. Already in Docker, it has a strong incentive for them to be divided into several processes, offering all the necessary tools for this, which has some advantages.

They are modularity, layeredness, better version control, reversibility and faster deployment.

Let's begin with the explanations for modularity: Since Docker runs applications in a compartmentalized manner, it is perfectly possible to disable some part of the program in question, for whatever reason, without completely disrupting it. In addition, it is easy to share processes between various applications.

Now, speaking of the layers; each Docker for Windows image file is made up of several of them, which are combined to form the final image. Whenever there is any change in the image, even a copy command, a new layer is created.

When creating new containers, layers can be reused to make the creation process considerably faster and future changes are shared between images, further increasing speed, size and efficiency.

The best version control is given that, whenever something changes, a changelog is created. The possibility of an easier reversal is probably the best advantage guaranteed by the use of layers, as there are always changelogs of everything, making access and reverse to previous versions much simplified.

Finally, the speed of deployment offered by Docker for Windows is critical to overall technology development, as it reduces the time it takes to get new hardware up and running from hours or days to mere minutes, while reducing the cost. It also facilitates upgrades, something else that had high costs.

Having a container for each process can simply share similar processes with new applications, which becomes even faster since an operating system is not required for this.

how it works

What did you think about our article about Docker for Windows?

Leave a comment if you have learned something new about software development, if you already knew about this platform or if you think we have forgotten something important. s

And if you want to start programming, check out the best courses available and the best ways to learn how to build apps on Android, and the best platforms for courses in general, where you'll find such instructions and more.