Kubernetes is an open source system for automating deployment, scaling and management of containerized applications. It was originally built by Google and runs in production inside Google Cloud Platform. Kubernetes started as a small project but has grown into one of the most popular tools to manage containerized environments across multiple platforms including AWS, Azure and GCP. This article provides a basic introduction to Kubernetes architecture, components and installation steps with some real use cases using kubectl commands in order to get you familiar with Kubernetes features
Kubernetes is a collection of tools that help you manage your containerized applications. Kubernetes is an open-source, container management system. It consists of several components, some of which are:
Kubernetes is a system for managing containerized applications in cloud native environments, such as on any of the major public clouds or on-premises. It's made up of several components that provide functionality around orchestration, service discovery, networking and more. Here's an overview of those components:
Kubernetes architecture is a collection of components that work together to provide a highly available, scalable, and self-healing environment for your applications.
The components of the Kubernetes architecture are:
The first step to using Kubernetes is to install it. You can do this on a laptop or desktop computer with the latest version of Ubuntu or Red Hat Enterprise Linux, CentOS, or Fedora. You'll also need 2GB of RAM and 20GB of disk space for the minimum install.
Once installed, run kubectl --kubeconfig="$HOME/.kube/config" get nodes to see if your cluster is running properly by listing all available nodes. If there are no errors—and you see output similar to 11:58:34 I0517 12:00:50.897480 1 controller-manager-master Ready ActiveLeaderMasterControllerAddress=10.32.0.26:6443 LeaderElect=true
Kubernetes provides you with the ability to scale your application based on demand. For example, if there is a surge in traffic during the day, you can increase the number of instances of your service and then decrease them again when traffic drops off at night. Or if you have an event that causes people to visit your website in droves (maybe because it's featured on Product Hunt), you can add more resources so that performance does not suffer.
Another way Kubernetes helps with scaling applications is by providing self-healing capabilities for services running on top of it. Your application will automatically restart any pods whose containers have crashed or become unhealthy, ensuring that they are always available even if something goes wrong within them. This means that if one instance crashes due to an unexpected error or other problem—such as human error—it will be replaced by another one automatically without any intervention needed on your part!
Kubernetes is a complex system, but it's all about the API. The API is the interface that you use to interact with Kubernetes. It has many benefits:
Kubernetes is a system for automating the deployment, scaling, and management of containerized applications. Kubernetes clusters consist of one or more nodes that run containers to host your application’s components. Each node runs one or more containers and provides them with resources such as CPU, memory and networking.
Clusters have two distinct types of nodes: master nodes and worker nodes. Master nodes provide API services to the cluster’s users; worker nodes handle the work of running pods (the basic unit for scheduling workloads on Kubernetes). Pods are groups of closely related containers; each pod is scheduled onto one or more workers according to resource constraints defined by its configuration file. Containers within a pod share an IP address space, volumes, some network namespaces and other resources provided by their host machine (i.e., they are “containerized”).
The lifecycle management of all pods within a cluster is managed by kubelet daemons on each machine in the cluster; these daemons respond to requests from clients such as KUBERNETES_TASK_ID=$(date +%Y%m%d) . Pods can be thought of as ephemeral entities - they exist only within their hosts until they are deleted or moved elsewhere through replication controllers - whereas containers persist even after being stopped because they use bind mounts instead (i.e., referencing files outside themselves).
The benefits of using clusters include:
Since Kubernetes is an open source platform for automating deployment, scaling, and management of containerized applications, it's a great tool for managing containerized applications.
Kubernetes is a platform that allows you to deploy and manage containerized applications. It was originally created by Google in 2014 as an internal project to automate their own infrastructure. The project was made public in 2015 under the Apache 2 license, and it has rapidly gained popularity since then because of its simplicity and ease of use.
Kubernetes is a powerful tool for managing containerized applications. It's the best choice for running containerized applications in production, and it’s the most popular container orchestration system in the world.
Kubernetes is built on Google’s internal experience running containers at scale. It was open-sourced by Google in 2014 and has been growing rapidly ever since. Kubernetes has become an important part of Cloud Native Computing Foundation (CNCF), which aims to drive cloud native technologies into production at scale.
Kubernetes is an open source container orchestration tool that runs on top of the same technology used by Google. It can be used to deploy, manage and scale applications in a production environment.