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[Kubernetis] Managing Pod using Replicaset

Hello neighbors ^.^ For today's post, let's learn how to manage your Pod using Replicaset. ReplicaSet's purpose is to keep the execution of the replica pod set (replicated copies of the pod) stable at all times. To maintain a fixed number of pods, we look at the status of the objects and if there is a difference between Spec and Status, we take action to bring them back together. ReplicaSet's Sp..

Hello neighbors ^.^ Good morning to you. Today, we will learn how to use Deployment, one of the Kubernetis controllers. Deployment is a high-level concept workload resource for creating a pod and provides declarative updates for ReplicaSet and the Pod, as shown in the figure below. Declarative updates provide useful functions for updating versions of the Pod. There are several types of updates. ..

Hello neighbors ^.^ Good morning to you. Today, I'm going to post about the types of Kubernetes service objects and how to create and manage them. First of all, I will create a pod using the Depoyment and connect the pod using the Service. Service is an abstraction method that exposes applications running as Pod services to network services. Pod has its own IP when created, but given the environ..

Hello neighbors ^.^ Good morning to you. Today, I'm going to use crul to access the API without using KUBECTL in the Kubernetes environment I'll post about how to do it. First of all, in order to access the API, we need to know the information of the API, right? Then, shall we follow the procedure below to find out the API information? 1) First, check the configuration information of Kubectl. ub..

Hello neighbors ^.^ Good morning, sir. Today, we're going to install a minikube on a single node and build a Kubernetis lab environment I'll post about how. This procedure is based on uuntu. 1. Installing Minikube Minikube is a tool that can be made in Kubernetis environment. Then, I will try to install Minukube through the procedure below. 1) Update the version of the tool using the command bel..

Let's learn how to write the template file within the chart. There are no strict rules for the template file name, only the extension .yaml is used, and the helper is .tpl. ​ Helpers can define reusable objects throughout the chart. Template directives must be enclosed in {{ and }} , for example, template directive {{ .Release.Name }} assigns a release name to the template.. ​ built-in object Re..

​ Helm Ovierview In Kubernetes, there is a Package Managing Tool called Helm. This tool is similar to npm of node.js, it is a tool that makes it possible to distribute packages of Kuberentes. The structure of this Helm is as follows. ​ Helm uses a Package Format called Chart, which is a set of files that define Kubernetes Resources. You can think of it as yaml + templates = helm. ​ ​ In Helm, pa..

Volume Overview In this post, we will learn about the concept of Volume and how to use it in Kubernetes. The schematic structure of Volume on Kubernetes is as shown in the figure above. Using the Volume parameter of Pod, define the value of PVC (persistent volume claim), and use this value to send the PVC to the PV (Persistent Volume) mapped to the storage to send the Pod This is the structure t..

In this post, we will learn about the Configmap object in Kubernetes. All applications use environment variables, settings, and data used by the application. For example, the application refers to data such as API key or token password. sourceof picture:Kubernetes in action If you look at the picture above, there are two development systems and two production systems, and the environment setting..

In this post, we will learn about Daemonset Object in Kubernetes. There was a Replicationset as a similar object. The difference between these two is that ReplicationSet distributes pod deployments to nodes randomly by the scheduler. That is, two or more Pods may be deployed on one Node. It may not be deployed to all Nodes. In other words, it is an Object that distributes randomly and manages th..