Why are Docker and containers so popular now?

4 min readApr 9, 2021

A book in 1981 by the name of Nailing Jelly spoke about software as something challenging to get a firm grip on. And that is true right now as well, with some applications which you make yourself or buy off the market shelves remains hard to run, manage, and deploy. But helps you get a firm grip on your application in every process, from development to deployment. Docker provides a method to wrap up an application so that its deployment and runtime issues have management outside the application itself. The management facilities have storage and memory input and output, access permissions, and performance as well. You can also run your containers on any OS which is compatible with Docker and has the runtime.

Containers work a little similar to a virtual machine but in a very subtle way. Instead of running hardware configurations for separate devices, they isolate the single application and its dependencies from external software libraries. The app requires these libraries to run from the operating system and the other containers as well. All the containers share a standard operating system with the other containers, and they are compartmental in a dependent way from the system. Some of the benefits of Learn Docker Step-by-Step are-

1. Docker allows you to use system resources efficiently

Instances of container apps use far less memory than other virtual machines. They also start and stop significantly quicker than other applications. Docker certification containers have a denser pack with their host hardware, allowing less spending on hardware bills. The cost of your hardware use depends upon what apps you choose to play and how resource intense they are in nature. Containers usually work as they are more efficient than virtual machines. It is also possible to save money with software licenses because you need fewer OS instances to run the same applications load.

2. Docker enables faster software delivery cycles

Enterprise software has to respond quickly with changing conditions, and that means both easy scalings to meet demand and easy updates. The updates can also scale with the features an organization requires, leaving out the rest. Docker containers also make it easy to upload new versions of software to the cloud. This feature also allows software users to roll back to a previous version if they need to. It also makes the implementation of blue/green deployments easier than usual, which you will know if you Learn Docker Step-by-Step.

3. Docker aids application portability

The operation method of your Docker certification enterprise application makes a lot of difference in security. You can operate it behind a firewall for an extra layer of protection to keep things secure. Or you can run it in the public cloud for easy access by the public and high flexibility of resources. Docker containers compress everything an application needs to function, and they allow applications to shift effortlessly between both environments. Any application user with Docker runtime can efficiently run a docker container on a cloud instance or developer’s computer.

4. Docker is best for microservices

Lightweight, self-contained, and portable Docker containers make it easy to build progressive software. Microservices is just one of the container patterns which Docker makes easy. Applications in micro-services are loosely packed and allow different parts of a business application to scale, modify, and service separately. Containers are not a necessary inclusion with microservices but are perfect for agile development processes, and you can learn that if you Learn Docker Step-by-Step.

Docker is a fantastic tool that can aid you in many places, but there are certain things that it cannot do.

1. Docker will not make your security better

Docker certification runs applications in a container, which is excellent as it adds an extra layer of protection. But that does not say anything about the pre-existing condition of your internet connection or computer. You can still have security compromises if attacked by a hacker who possesses expertise with containers.

2. Docker does not convert applications into microservices

If you Learn Docker Step-by-Step and convert a pre-existing application into a container, you can reduce its resource consumption and make it significantly easier to deploy. But it does not change the design of your application or how it interacts with other applications in the Docker platform. The benefits only come through the developer’s time and effort and just the mindset of moving everything inside containers.

3. Docker is not a virtual machine

One of the most predominant myths in the container world is that Docker can make virtual machines obsolete. Many applications that run inside virtual machines can move inside a container, but that does not mean all of them can. If you run organizational apps inside containers, you can swap many applications from virtual machines, but it will not get you the isolation of virtual machines.

Originally published at https://tananet.net on April 9, 2021.