Introduction about Docker and Reasons for its Popularity

By Shiva Gaur
November 28, 2018 | 1218 Views

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Docker is a trending technology with the ability to wrap Linux’s operating system-level virtualization. It simplifies various tasks of developers such as building, managing and securing apps anytime, anywhere. Docker and containers work together to offer greater flexibility and convenience to the developers.


Docker is used to build containers that are used to store resources. Containers are the special type of processes that can access only the resources assigned to them. Thereby, isolating the set of resources from others, not in need. Both these platforms allow developers to run a single application with multiple platforms.

But why this isolation of resources is required?

Eliminate interference of different processes running on the same system.
Store information securely as data-sharing isn’t allowed between the resources, thereby, reducing data theft.
When more isolated applications can run on the same system, there will be less requirement of hardware.

If the containers are unable to work appropriately, they can be the root cause of security breaches. That’s the reason containers need to be consistent and reliable.

Did you know how popular Docker is? And how many people search Docker on Google on a daily basis?

Here is the result.

But what is the reason for its popularity?

It is popular because of limitless possibilities it opens for software development, delivery, and its deployment. Let’s discuss in detail how it helps in resolving problems and increase efficiency.

1. Faster Scaling

Containers allow businesses to work efficiently eliminating the need for deploying more computer hardware devices. Initially, scaling of businesses meant more devices and servers. However, businesses became victims of their own success as they had to shell out thousands of dollars to maintain them. Docker containers, on the other hand, allow sharing of systems which in turn lowers the cost of businesses.

2. Ease of Use

The best thing of using Docker container is that it is extremely easy to use. Learning, creating, and managing containers is not only simple but also easy to implement. Docker is an open-source platform which only needs a computer and an operating system to start with. Make sure your OS supports Docker for Mac/Windows, Virtualbox, or supports containers natively, such as Linux.

3. Better Software Delivery

Docker containers help to increase the efficiency of the tasks. The reason behind that is containers are portable, self-contained and have an isolated disk volume. That’s the reason, specific the container is relocated, it takes the dependencies such as libraries and runtime along with them.

4. Flexibility

Containerized applications are more flexible and resilient when compared to non-containerized applications. Containers that come with orchestrators are not only powerful tools but they also have the ability to manage large deployments and complex systems.

5. Software-defined Networking

One of the best things about using Docker containers is that it supports software-defined networking. You can easily define the islolated networks for the containers without the need of touching even the single router. This not only secures your network but containers can also run easily on any isolated virtual network including tightly-controlled ingress and egress paths.

6. The Rise of Microservices Architecture

Microservices have extremely simple functions that are accessed by HTTP/HTTPS. Most software system starts with “monoliths” which is very difficult to maintain and deploy. Microservices can break a system into simpler functions so that they can be deployed independently. They are efficient, self-contained, and can easily be deployed.

Why and When should we use Docker?

Yes! Why not. Using Docker you can design applications that can handle high loads and performance. You can also achieve deployment with high velocity. If you already run high-performing and loaded applications, you should definitely make use of containers. Moreover, if you aspire to become a developer and practice how to run and develop applications successfully. Start using Docker containers.

When you shouldn’t use Docker or Containers?

Every technology has a different usage and functionalities. Similarly, developing, deploying and implementing with the container is entirely a different process if compared to traditional methods. Therefore, you shouldn’t use docker and containers if:

Your Team needs Significant Training

If your team needs quick training with less time consumption, you shouldn’t make use of docker. Container development takes time and it is not something that can be done instantly, you have to slow down and deliberately.

You have a High-risk Profile

If you are working at a high-risk profile where revenue-generation tasks are performed, it is better to stay conscious while using containers. The benefits of containers come with additional complexity as you have to maintain, deliver, operate and monitor them on a regular basis.o

You can’t Hire the Talent

Docker is a way new software that needs appropriate developers to manage, develop and deliver a successful application. To understand its functions and proper usage before developing applications, is of extreme importance. Therefore, hiring an experience to develop is crucial.

Consider your System’s Complexity

Before you get started with Docker, you need to find out the answers to certain questions such as is your system really needs a Docker? Will it really help you organize and simplify your business tasks? Will it fulfill all your requirements?

Wrapping Up

There is no doubt that containers have helped businesses to scale eliminating the need od more servers. Expensive systems and dedicated hardware resources can now work on a sharing basis. If you too are planning to integrate Docker containers to build and deploy applications, go for it! However, it is advisable to have a better understanding of its functioning, advantages and disadvantages before you get started!

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