A Detailed Comparison Between Kubernetes And Docker


Containers solve this problem by packaging microservices and running them in the same operating system, as illustrated below in Figure 1. Docker is a containerization platform for building and deploying applications in containers independently from the operating system. It can be installed using Docker Desktop on Windows, Linux, or macOS and includes other solutions like Compose and Swarm.

Docker provides a containerization platform which supports various operating systems such as Linux, Windows, and Mac. It allows us to easily build applications, package them with all required dependencies, and ship it to run on other machines. The advantage of using Docker is that it provides benefits for both developers as well as a system administrator. For develops it focuses on writhing the code without worrying about the system.

Some parts are standard, like the Kubernetes API, Scheduler, and Kubelet agent. Other pieces have no default and require choosing from many industry options, like container runtime, networking, and ingress proxy. Docker created the idea of a “container https://globalcloudteam.com/ image registry,” which allows you to store images in a central HTTP/S server and push/pull them as easily as doing so with git commits. The most popular registry is Docker Hub and you can find many open source projects with official images there.

Utilities equipment management solutions monitor equipment performance, allowing managers to optimize maintenance schedules and minimize downtime. Service is a logical set of Pods that work together at a given time. This fixes the issue created when a Pod is deleted so that other Pods or objects can communicate with the service instead. The set of Pods of one service is selected by assigning a policy to the service to filter Pods based on labels.

If Docker Is So Great, Why Do We Need Kubernetes?

That also means it’s likely unnecessary if all you need is a few dozen containers and three to five servers. It’s that sub-process of Docker that does the grunt work of talking to the Linux Kernel. Well, containerd is now the 2nd most popular Kubernetes runtime. Cloud service providers often use it as the default because of its small footprint and purely open-source design and oversight. It doesn’t aim to be user-friendly to humans directly, but rather to act as the middleware between your containers and tools like Kubernetes. Every major public cloud service offers its distribution-as-a-service, like AWS EKS, Azure AKS, DigitalOcean Kubernetes, etc.

kubernetes vs docker

Under the hood of most serverless infrastructure, it’s running your functions in containers. Docker Swarm – Now maintained by Mirantis, this built-in feature What is Kubernetes of Docker Engine works great for many of my Docker students. It’s slow to progress on new features, yet plenty of businesses rely on it daily.

Easy App Packaging

For a system administrator, it provides flexibility to reduces the number of systems for testing the applications. Kubernetes offers dozens of resource types that abstract cluster functions such as networking, storage, and container deployments. Learning the different resource types and their roles presents a fairly steep learning curve to a newcomer.

kubernetes vs docker

Docker and Kubernetes have been the two most commonly used, discussed, and compared phenomena in the recent years of cloud computing. Docker is the most popular container platform, whereas Kubernetes is the de facto container orchestration system. Thus, both tools work on containers but with different focuses and mindsets. Swarm has a built-in load balancing feature and is performed automatically using the internal network. All the requests to the cluster are load-balanced across hosts. Kubernetes and Docker are different scope solutions that can complete each other to make a powerful combination.


Regardless of whether you choose Docker, Kubernetes, or serverless, remember that the tool isn’t the ultimate objective. Always keep your business’s DevOps goals in mind, and try not to get distracted by the “shiny” appeal of advanced tools just for the sake of using cool new tech. Kubernetes is to a group of servers what Docker is to a single server.

  • Projects are trying to solve the hard parts like k3s and Rio, but it’s far from easy if you’re managing a custom cluster yourself.
  • Docker is simplifying the DevOps methodology by allowing developers to create templates called images using which u can create the lightweight, a virtual machine called a container.
  • They have enabled the development, testing, and deployment of cloud-native applications in a scalable way, so it is inevitable for both to have increased adoption in the industry.
  • On the other hand, Docker enables easy management of UI using third party tools.

When demand surges, Kubernetes provides orchestration of Docker containers, scheduling and automatically deploying them across IT environments to ensure high availability. In addition to running containers, Kubernetes provides the benefits of load balancing, self-healing and automated rollouts and rollbacks. Although Kubernetes and Docker are distinct technologies, they are highly complementary and make a powerful combination. Docker provides the containerization piece, enabling developers to easily package applications into small, isolated containers via the command line. Developers can then run those applications across their IT environment, without having to worry about compatibility issues.

It is now possible to connect virtually any automation solution to the cloud through various industrial protocols. Smart home managers enable IoT devices to communicate, automate processes and be controlled by one source, such as a smart assistant or mobile phone. However, it is easier to achieve scalability with Swarm, while Kubernetes is more flexible. A label is a key/value pair of attributes that can be assigned to Pods, services, or other objects.

Rather, there are plenty of differences between the two that should be understood before you pick a container technology. With that in mind, here is a detailed comparison between the two so that you can understand more about the differences between Docker and Kubernetes. Day-to-day use is very similar to established Docker workflows.

First, it’s important to start with the foundational technology that ties Kubernetes and Docker together — containers. It is a highly flexible container tool to deliver even complex applications. Applications ‘run on clusters of hundreds to thousands of individual servers.” It also allows you to manage your containerized application more efficiently.

The controller process is a control loop that watches the shared state of the cluster through the API server. When the state of the cluster changes, it takes action to change it back to the desired state. The control manager monitors the state of nodes, jobs, service accounts, tokens, and more. Compose allows you to split the application into several containers instead of building it in one container.


You can use any container run times like RunC, cri-o, podman, or Docker. When you deploy containers using Docker, and if for any reason your container gets killed, there is no way to start it automatically when that happens. Many container technologies are available in the market like Java containers, Unikernels, LXD, OpenVC, Hyper-V Containers, Docker,podman, etc. If your application stack is small—like a couple of microservices—it’s better to use Docker Compose instead of Kubernetes.

The software is primarily leveraged for virtualization at the system level. Docker enables users to run multiple operating systems on a single virtual host via clustering of different Docker hosts. In other words, containers provide developers with greater control over products compared to conventional means of virtualization. Because of their negligible footprint, they enable quicker development of applications and increased scalability. It can be difficult to jump from the friendly developer-focused Docker tooling to the verbose and un-opinionated world of Kubernetes. Projects are trying to solve the hard parts like k3s and Rio, but it’s far from easy if you’re managing a custom cluster yourself.

kubernetes vs docker

The portability of containers eliminates many of the conflicts that come from differences in tools and software between functional teams. Docker is an open-source lightweight containerization technology. It has gained widespread popularity in the cloud and application packaging world. It allows you to automate the deployment of applications in lightweight and portable containers. Kubernetes is a production-grade system which includes auto-scaling, network ingress, and easy observability integrations in its default installation.

Kubernetes Vs Docker:

Docker and Kubernetes are both compelling technologies, and most of the time, people are often confused about whether they should use Docker or Kubernetes. In this blog will explain Docker vs Kubernetes and go over other vital concepts around Docker and Kubernetes. Kubernetes focuses on abstraction layers and API extendibility, whereas Docker focuses on containers directly.

He enjoys working on things that make the job of an engineer easier and has deep customer empathy, especially when it comes to working with bad technology tools. In his spare time, Josh likes biking with his daughters, eating and drinking things that are bad for him, and playing with new technologies. Kubernetes monitors the running environment and compares it against the desired state.

First, we will discuss exactly what containerization is and then we will dive into the benefits of each solution. While the perfect color palette or the most sublime button shading or myriad of other design features play an important role in any product’s success, user interface design is not enough. Customer engagement and retention requires a strategic plan that attempts to measure, quantify and ultimately create a complete satisfying user experience on both an … Bookmark these resources to learn about types of DevOps teams, or for ongoing updates about DevOps at Atlassian. You must integrate other logging solutions into the cluster to achieve this functionality.


With Docker, developers can automate the entire infrastructure, reduce resource utilization, and isolate the application to ensure that no other application can influence it. Docker Swarm is another open-sourcecontainer orchestrationplatform that has been around for a while. Swarm — or more accurately,swarm mode — is Docker’s native support for orchestrating clusters ofDockerengines.

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