Kubernetes uses container technology and allows you to run containers on several compute nodes (this can be a virtual machine or servers without an operating system).
To know the answer of this question, keep on reading this article. In the given article, you will come across the information related to Kubernetes, Docker, and how are they related. In the end, you will be able to get whether you should go straight to Kubernetes or is there a need to learn Docker as well.
Kubernetes uses container technology and allows you to run containers on several compute nodes (this can be a virtual machine or servers without an operating system). Once Kubernetes has taken control of a set of nodes, containers can be rotated or shredded at any time, depending on our needs.
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There are two ways to look at Docker. The first approach is to think of Docker containers as lightweight virtual machines, and the second approach is to think of Docker as a software package and platform for delivery. The latter method has proven to be much more useful to human developers and has led to widespread acceptance of this technology.
Relationship Between Kubernetes and Docker
Kubernetes and Docker are real solutions for intelligently managing containerized applications and delivering powerful capabilities, hence some of the confusion. Kubernetes is now used as an abbreviation for the entire Kubernetes-based container environment. In fact, they are not comparable, emerged from different roots, and are solved for different things.
Docker is a tool and platform for producing, distributing, and executing Docker containers. This tool offers native clustering that you can use to install and program containers on clusters of computers. Kubernetes is a Docker container orchestration system that is broader than Docker Swarm and aims to efficiently coordinate clusters of nodes at a production scale. Based on the concept of pods, these are modules that are programmed (and can contain one or more containers) in the Kubernetes ecosystem and distributed among nodes to offer high accessibility. Docker can be easily built on a Kubernetes cluster, but Kubernetes itself is not a complete solution and should include custom plugins.
Kubernetes and Docker are fundamentally different technologies, but they prove excellent together, making it easier to manage and deploy containers in a distributed architecture.
Later versions of Docker have Kubernetes integration. This feature allows developer teams to automate and manage all the containerized applications more effectively, which are build with the help of Docker.
Using Kubernetes without Docker
Because Kubernetes is a container orchestra, it takes time to orchestrate the container. Kubernetes is mostly used with Docker, but can also be used with any container. RunC, cri-o, containerd are some other container runtimes that can be deployed with Kubernetes. The Cloud Native Computing Foundation (CNCF) manages a list of approved container runtimes on the ecosystem page, and the Kubernetes documentation offers specific instructions for configuration using ContainerD and CRI-O.
Kubernetes does not have the ability to create and manage container images, nor does it run containers alone. It must work with external container source and runtime. However, it can use containers from a variety of different sources and is compatible with non-dockerd timing, so inherently independent of Docker.
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Coming to the conclusion, did you find the answer? I guess, the answer, as you may have guessed by now, is that it depends on your needs and skills. If you're new to the containerization and your needs are low, it's hard to just beat Swarm. But if you are more experienced, if your containers are very complex, if you need to take full advantage of rollback, or if priority is stability, Kubernetes is the way to go.