November 7, 2022 . 4 min read .
Kubernetes is a leading tool for deploying and managing large containerized applications. As a result, it’s no surprise that more and more enterprises are using Kubernetes as their primary tool for managing and operating large-scale, containerized applications. In this blog post, you’ll learn everything you need to know about Kubernetes, the Containers they manage & why Kubernetes is right for your organization.
Before we dive into the ins and outs of Kubernetes, let us first briefly go over the concept of Containers.
Containers are lightweight, self-contained units of software that can be launched and managed as individual processes. Containerization is the process of packaging an application into a container and shipping it across the network. It allows applications to be shipped from Development to Production without changes or recompiling.
The two most frequently used mechanisms to host applications in a computer system are Containerization and Virtualization. Unlike Containerization, which involves encapsulating an application in a container with its own operating environment, virtualization uses the notion of a virtual machine as the fundamental unit, having an independent OS for each virtual machine.
Kubernetes, also known as K8s, makes it easier to deploy, scale, and operate containerized applications in production by providing tools for setting up containerized application clusters, managing application lifecycles, and executing workflows that span multiple containers. In other words, Kubernetes is the best tool for managing and operating large-scale, containerized applications. It’s a critical piece of the puzzle for DevOps teams who want to automate application deployment and management across distributed environments.
Kubernetes can be used to deploy and manage containerized applications on any cloud, including Azure. It also supports hybrid environments that are composed of on-premises and cloud-based resources.
For software architects and engineers, K8s provide a number of benefits in managing software applications, including:
Kubernetes and Docker together provide a highly integrated platform for managing, deploying, and orchestrating containers at scale.
You can use Docker for building container images on a laptop, then run the containers in your Kubernetes cluster. The containers can then be deployed and started on any container-friendly platform, like Kubernetes, Docker Swarm, Mesos, or HashiCorp Nomad.
The difference between them is that Docker is for packaging containerized applications onto a single node, while Kubernetes is for running them on a cluster. Put in layman’s terms, Docker is about building single containers, whereas Kubernetes is about managing and orchestrating a vast amount of them.
For those who are already using Docker, Kubernetes leverages existing containers and workloads, all the while taking care of the difficult issues involved with scaling up. When demand spikes, Kubernetes provides Docker container orchestration, scheduling, and automatic deployments within its environments, to provide high availability.
Also, now that Docker has been deprecated by Kubernetes, any similar container runtime like Containerd or CRI-O could do the packaging for you.
To understand how K8s or Kubernetes work, let us look at their core components and their role in the functioning of a K8s system. The first step is to understand the foundations of the functionality and how Kubernetes clusters are set up.
A cluster is created when Kubernetes is deployed. Components, which are assemblages of services, make up a cluster. Kubernetes offers a lot of components you can use, but which one should you use? That depends on your overall needs. Here’s a list of some common components:
Kubernetes Engine: Kubernetes Engine is a managed cluster of Kubernetes components. It’s deployed in a cloud service and comes with multiple built-in templates, preconfigured clusters, an integrated scheduler, auditing, analytics, and reporting. Kubernetes Engine instances can be upgraded or downgraded. Kubernetes Engine is best used as a backend for on-premise clusters or building a production cluster with a minimum amount of configuration necessary.
Nodes: A Kubernetes cluster consists of a set of worker machines, called nodes, that run containerized applications. Every cluster has at least one worker node. All the other nodes expose a port on the network, which is called a Kube-public network. The Kube–public network is where you should select your cloud provider’s load balancer, so that your services, which are the applications, can be reached by the rest of your cluster.
Pod: The worker node(s) host the Pods that are the components of the application workload. The control plane manages the worker nodes and the Pods in the cluster. In production environments, the control plane usually runs across multiple computers and a cluster usually runs multiple nodes, providing fault tolerance and high availability. Prior to deployment, the control plane is configured by the project team, and a load balancer is bootstrapped that serves each Pod at a predefined IP address.
Kubernetes Dashboard: It is used to view and manage your on-premises Kubernetes cluster. The Kubernetes Dashboard allows you to create advanced, customized clusters and then manage all of the Kubernetes components using the tooling and workflows provided by Kubernetes.
Kubernetes offers a number of key features that make it easier to deploy, scale and operate containerized applications in production. These features include:
Now that you are all caught up on what Kubernetes (K8s) are and how they work… is it right for you? We will attempt to answer this question in the below section by listing out a few examples of what Kubernetes does best:
Ozone is focused on eliminating every complexity of a DevOps team. It simplifies and automates containerized and decentralised application deployments across hybrid cloud and diverse blockchain networks. Ozone integrates seamlessly with major tools across CI, CD, analytics and automation to support your software delivery end to end for even the most complex scenarios.
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As I sit down to write this blog, I cannot help but feel overwhelmed with emotions. Our organization recently visited the orphanage Shree Shiradi Sai Anathalaya Charitable Trust to help educate the children there, and it was an experience that touched my heart in more ways than one. The orphanage was a humble apartment in […]Read more