Dockers vs kubernetes: a complete guide for 2021

Docker or Kubernetes? Which one is best? Which should you choose? These phrases are the ones we commonly hear in the cloud computing industry.

Never forger, Ansible vs docker too, this trio has dug a deep hole nowadays into web-stuff.

But a surprising fact is that their one-to-one comparison is something null. It is just like you are comparing potatoes with potato chips. It is a fallacy that you have to choose the best among them.

Also read; Docker vs Vagrant

difference between Dockers and Kubernetes?

Both of these tools don’t draw a strong comparison. It is like a comparison of a Fish to a Fish curry. But still, there is a space of comparing Kubernetes and Docker Swarm that is orchestration technology that has the main focus on clustering. Also, it is tightly consolidated to Dockers ecosystem but using its own API.

  • Kubernetes is capable of running across clusters, while Dockers can only revolve around singles.
  • Kubernetes has high availability and more flexibility than Dockers.
  • If we talk about extension feature, Kubernetes is more extensive than Docker Swarm because it is designed for clusters. The installation process is difficult for Kubernetes, and it is easier for Docker.
  • Docker is easy to learn and understand, while Kubernetes is a bit complex.
  • Kubernetes is more user-friendly with high GUI compatibility. Docker is a reverse of it, with no GUI at all.
  • You can get rolling updates by using both tools.

You probably are looking for details, Be with us. In this article, we are going to cover both topics in detail. Their real definitions, functions, advantages, and disadvantages. You can call it the real guide on Docker and Kubernetes.

Based on this true information, we will decide whether both these software can be compared or not. This article will be quite helpful for you if you are from a technical or even a non-technical background.

You will be able to gather apt information about both amazing tools used in today’s booming technology world. Let’s start with Kubernetes.

What is Kubernetes?

Kubernetes is referred to as

An open-source containerization platform that offers a smooth operation of an elastic web server framework for cloud computing and related applications.”

In short, Kubernetes allow you to scale, deploy, and manage containerized Linux applications and many of the manual processes very efficiently.

Kubernetes is a user-friendly project, initially developed by Google in 2014. It allows its users to interpret and clarify the desired state of their container architecture deployment.

Features of Kubernetes:-

Kubernetes has varied advanced features. Some of them can be gone through below.

  • Kubernetes is good enough to handle its system of managing multiple containerized applications at a time. It allows you to prevent downtime.
  • It can efficiently manage load balance to stabilize the deployment.
  • Kubernetes provide extra self-healing by restarting the failed containers, replacing and killing deficient containers. Also, it refrains from advertising until the containers are fully ready to serve.
  • It can change the current state of a deployed container to the desired state at an accountable rate.
  • An amazing feature is that it allows you to manage extra sensitive information such as SSH keys and passwords by updating and deploying them timely.

Pros of Kubernetes:-

There are many advantages of Kubernetes out of the hype. You will tire of counting them. Let’s put an eye on some of them.

Kubernetes is in the list of top 3:

Yes, you read it right. Kubernetes fall among the top 3 platforms that are richly in demand in Overflow Developer Survey 2019. Like many developers and software engineers who need highly ranked technologies, Kubernetes is enough to meet their expectations.

It can attract many potential applicants by working in combination with other thriving tools such as Docker.

Kubernetes help in the smooth running of applications:

Kubernetes is very effective in making your applications run smoothly and stably. You will be updated and notified before the downtime of your software so that you can change it timely.

Kubernetes is reliable

If you have come up with a plan of using Kubernetes, you need not worry for several years. You can rely on it as it is not going to deceive you for many years. There are a lot of reasons behind this. Let’s put some light on a few of them.

The majority of cloud vendors rely on it because no other container orchestration provides such amazing solutions.
Many well-reputed colonies are now depending on Kubernetes as its ecosystem is growing and expanding remarkably.

A huge source of growing user base

Kubernetes is developed amazingly by Google engineers in such a way that it can grow your user base up to a vast extent. It is engineered with outstanding functions that are enough to handle and support large systems.

Kubernetes is a cheaper program

Affordability is the most important factor that everyone looks for. What if it is available in your favorite containerized application?

Kubernetes is a much cheaper solution and affordable in comparison with other such platforms. It is, however, a little expensive for small applications but far better than other platforms in terms of expenses.

But the fact is that your overall cost calculation depends upon your infrastructure needs, required by computing resources. So the larger your computing resource needs, the less required are these infrastructures.

Cons of Kubernetes

  • Kubernetes can be too much to learn and understand. You may find it very complex and difficult to learn. So we suggest you have an expert with you while passing through the beginner’s stage.
  • It requires vast experience and training for troubleshooting.
  • Reaching an expert level of Kubernetes will require a lot of time and extensive training.
  • After Kubernetes, it is crucial to know about Docker. So let’s dive into the ocean of information associated with Docker.

What is Docker?

Docker can be referred to as

A container engine that is an open-source containerizing platform. It is developed by Dotcloud company and uses Linux Kernel features“.

It is an advanced tool that is engineered or developed to induce convenience in developing and deploying various applications by using containers. These containers allow you to package up all the parts of an application into one container or package.

Hence, Docker makes it easier to combine source code and OS libraries of an application into one container. Also, it is the best way to boost up your IT-related productivity out-of-the-box.

Why is Docker so popular?

It is no denying fact that Docker is a very popular platform for containerization. There are several reasons for this fact.

  • One of the main reasons for its popularity is that it has multiple possibilities and has varied deployment options.
  • It is very easy to use and learn. You don’t need to have a high IQ level or superpowers to learn this amazing engine. Sounds fun? But it’s a fact.
  • Docker is flexible to get started with. It is an open-source program. So you just need to have a laptop with an efficient operating system such as Linux. ( Operating system must be compatible with VirtualBox, Docker, and other native containers.)
  • Docker is much portable as it is self-contained and includes isolated disk volume. Also, its reliance gets shift with it.
  • Docker can easily eliminate configuration variance problems.

Pros of Docker:-


Docker containers are amazingly cheap to deploy and run applications or software. The standard is up, and the expenses are down. Isn’t it the combination that we all look for? Indeed it is.

Speed efficient

Docker is very speedy to deploy an application within few seconds. It’s an impressive feature that almost every developer loves.

Mobile and portable:-

Docker is flexible and free to use within any environment. In short, you can say that it is free of any environmental limitations.


Docker gives you the flexibility of making necessary changes even while releasing a product. Also, it allows you to build and release images that are deployable across multiple servers. Also, you make revisions to the final product many a time.

Besides this, there are many other advantages of Docker, including

  • Docker is time-saving.
  • It allows you to version and roll back images to their older version very easily.
  • It is a highly consistent and scalable container.

Drawbacks of Docker:-

Like every other technology, Docker also has some drawbacks, as nothing is and can be perfect. You need to know if you are just about to shift on Docker. Just have a look.

  • Docker is least compatible with some other containerizing platforms.
  • Dealing with data storage may be challenging because your data can be lost upon the sudden shutdown of Docker.
  • It is least friendly with GUI applications.
  • You have to keep these drawbacks in mind before migrating to Docker because any of them can be huge to some and minor to others.

Wrapping up

In short, we learnt that comparing Kubernetes and Docker directly based on their functions is stupidity. However, we can have only a bit of difference as we find a nose in two people but slightly different.

Depending on your requirements, you can choose either of the containers. But remember, these two can work as a boom together.

We have tried to put highly valuable information into this post. Let us know how did you like it.