“Kubernetes vs. Docker” is a phrase that we hear almost everyday as Kubernetes becomes ever more popular as a container orchestration solution. Many of us already know that it is also a misleading phrase because Docker and Kubernetes aren’t competitors. Docker is a containerization platform, and Kubernetes is a container orchestrator for container platforms like Docker. 

So, What is Docker?

Docker is a tool designed to make it easier to create, deploy, and run applications by using containers.

Learn more about containers in this post: Containers 101: What Are Containers?

Docker is a set of platform as a service (PaaS) products that uses OS-level virtualization to deliver software in packages called containers. Docker allows applications to use the same Linux kernel as the system that they're running on and only requires applications be shipped with things not already running on the host computer. This gives a significant performance boost and reduces the size of the application.

Docker is a tool that is designed to benefit both developers and system administrators, making it a part of many DevOps (developers + operations) toolchains. For developers, it means that they can focus on writing code without worrying about the system that it will ultimately be running on.

OS-level virtualization

OS-level virtualization refers to an operating system paradigm in which the kernel allows the existence of multiple isolated user space instances. Such instances, called containers (Solaris, Docker), Zones (Solaris), virtual private servers (OpenVZ), partitions, virtual environments (VEs), virtual kernel etc. Containers are isolated from one another and bundle their own software, libraries and configuration files; they can communicate with each other through well-defined channels. All containers are run by a single operating-system kernel and are thus more lightweight than virtual machines.

So, why does everyone love containers and Docker?

VM hypervisors, such as Hyper-V, KVM, and Xen, all are based on emulating virtual hardware. That means they need more resources. 

On the othe rhand, Containers use shared operating systems. They are much more efficient than hypervisors in system resource terms. Instead of virtualizing hardware, containers rest on top of a single Linux instance. With a perfectly tuned container system, you can have as many as 4 times the number of server application instances as you can using Xen or KVM VMs on the same hardware. 

Another reason why containers are popular is they lend themselves to Continuous Integration/Continuous Deployment (CI/CD).

Read more about Continuous Integration/Continuous Deployment (CI/CD) in this post: What Does It Mean By Continuous Integration, Continuous Delivery And Continuous Deployment?

Docker enables developers to easily pack, ship, and run any application as a lightweight, portable, self-sufficient container, which can run virtually anywhere. Containers do this by enabling developers to isolate code into a single container. This makes it easier to modify and update the program. In addition, Docker containers are easy to deploy in a cloud.

Specifically, for CI/CD Docker makes it possible to set up local development environments that are exactly like a live server; run multiple development environments from the same host with unique software, operating systems, and configurations; test projects on new or different servers; and allow anyone to work on the same project with the exact same settings, regardless of the local host environment. This enables developers to run the test suites, which are vital to CI/CD, to quickly see if a newly made change works properly.

What is Kubernetes?

Kubernetes is an open source orchestration system for automating the management, placement, scaling and routing of containers that has become popular with developers and IT operations teams in recent years.

It was first developed by Google and contributed to Open Source in 2014, and is now maintained by the Cloud Native Computing Foundation. Also known as “k8s,” Kubernetes provides automated container orchestration -- management of your machines and services for you -- improving your reliability and reducing the time and resources you need to spend on DevOps, not to mention relief from the stress attached to these tasks.

Kubernetes makes everything associated with deploying and managing your application easier. Kubernetes automates rollouts and rollbacks, monitoring the health of your services to prevent bad rollouts before things go bad. It also continuously runs health checks against your services, restarting containers that fail or have stalled, and only advertising services to clients when it has confirmed they’ve started up successfully. Additionally, Kubernetes will automatically scale your services up or down based off of utilization, ensuring you’re only running what you need, when you need it. Like containers, Kubernetes allows you to declaratively manage your cluster, allowing your setup to be version controlled and easily replicated.


Kubernetes Features

  • check Automated rollouts and roll backs
  • check Service health monitoring
  • check Automatic scaling of services
  • check Declarative management
  • check Deploy anywhere, including hybrid deployments
  • Service and process definition
  • Service discovery and load balancing
  • Storage orchestration
  • Container-level resource management
  • Secrets and configuration management

Wrapping up...

We learned that Docker is a standalone software that can be installed on any computer to run containerized applications. Containerization is an approach of running applications on an OS such that the application is isolated from the rest of the system. Docker is what enables us to run, create and manage containers on a single operating system.

Kubernetes takes it further. If you have Docker installed on multiple hosts (different operating systems), you can leverage Kubernetes. Kubernetes can then allow you to automate container provisioning, networking, load-balancing, security and scaling across all these nodes from a single command line or dashboard. Kubernetes can work with any containerization technology

A collection of nodes that is managed by a single Kubernetes instance is referred to as a Kubernetes cluster.


  • https://en.wikipedia.org/wiki/Docker_(software)
  • https://opensource.com/resources/what-docker
  • https://www.zdnet.com/article/what-is-docker-and-why-is-it-so-darn-popular/
  • https://cloud.google.com/containers
  • https://www.docker.com/products/kubernetes
  • https://containerjournal.com/topics/container-ecosystems/kubernetes-vs-docker-a-primer/


Kirkman Eron

Aug 08, 2020 04:08:17 am

Thanks for finally writing about Kubernetes vs. Docker? It's really a misleading phrase.


Aug 07, 2020 07:08:21 pm

I am genuinely glad to read this web site posts which includes tons of valuable facts, thanks for providing these kinds of statistics.


Jul 16, 2020 05:07:43 pm

This is really interesting, You are a very skilled blogger. I have joined your rss feed and look forward to seeking more of your excellent post. Also, I have shared your website in my social networks!


Jun 17, 2020 10:06:01 am

I'm extremely pleased to uncover this web site. I want to to thank you for your time for this wonderful read!! I definitely really liked every part of it and I have you saved to fav to see new things on your website.


Jun 17, 2020 12:06:22 am

Your means of describing the whole thing in this post is in fact pleasant, every one be capable of effortlessly understand it, Thanks a lot.


Jun 16, 2020 03:06:21 pm

Hey! Do you know if they make any plugins to protect against hackers? I'm kinda paranoid about losing everything I've worked hard on. Any tips?

Yogesh Chauhan's ebook

Jun 16, 2020 02:06:49 pm

Have you ever thought about publishing an ebook or guest authoring on other sites? I have a blog based upon on the same topics you discuss and would love to have you share some stories/information. I know my audience would enjoy your work. If you're even remotely interested, feel free to shoot me an e mail.


Jun 09, 2020 03:06:39 pm

Thank you for another informative web site. The place else may I get that type of information written in such an ideal method? I've a venture that I'm simply now running on, and I've been at the glance out for such information.


Jun 03, 2020 01:06:55 pm

I simply couldn't depart your web site before suggesting that I extremely loved the usual information an individual provide on your guests? Is going to be back frequently in order to check up on new posts


May 17, 2020 08:05:35 am

Great blog here! Also your site quite a bit up fast! What host are you the usage of? Can I get your associate link in your host? I desire my site loaded up as fast as yours lol


Mar 15, 2020 09:03:01 pm

Wow, superb blog layout! How long have you been blogging for? you make blogging look easy. The overall look of your web site is fantastic, let alone the content!


Mar 15, 2020 03:03:50 pm

It's a shame you don't have a donate button! I'd most certainly donate to this outstanding blog! I suppose for now i'll settle for book-marking and adding your RSS feed to my Google account. I look forward to new updates and will talk about this website with my Facebook group. Talk soon!


Mar 14, 2020 10:03:07 pm

Hey there I am so glad I found your weblog, I really found you by mistake, while I was researching on Bing for something else, Regardless I am here now and would just like to say thanks a lot for a tremendous post and a all round entertaining blog (I also love the theme/design), I don’t have time to go through it all at the minute but I have bookmarked it and also added your RSS feeds, so when I have time I will be back to read a lot more, Please do keep up the great b.


Mar 14, 2020 07:03:32 pm

Hello, alwɑys і used to cheⅽk web ѕite posts here in the early hours in the morning, because i love to learn more and more.


Mar 13, 2020 07:03:06 am

Hoᴡdy! Someone in my FaceƄook group shared this website with us so I came to look it over. I'm definitely loving the informаtіon. I'm book-mаrking and will be tweeting this to my follоwers! Superb blog and outstandіng deѕign.


Mar 12, 2020 07:03:03 pm

Great blog here! Also your website loads up very fast! What host are you using? Can I get your affiliate link to your host? I wish my site loaded up as fast as yours lol


Mar 12, 2020 09:03:25 am

Hi there, i read your blog from time to time and i own a similar one and i was just wondering if you get a lot of spam responses? If so how do you stop it, any plugin or anything you can suggest? I get so much lately it's driving me crazy so any assistance is very much appreciated.


Mar 11, 2020 12:03:25 am

It's very trouble-free to find out any topic on web as compared to books, as I found this post at this site.


Mar 10, 2020 06:03:01 am

You are so cool! I don't suppose I've truly read anything like this before. So wonderful to find someone with unique thoughts on this topic. Really.. thank you for starting this up. This web site is one thing that is needed on the web, someone with some originality!

Leave a reply

Your email address will not be published. required fields are marked *