Story Tag: container-orchestration

Stories Tag: container-orchestration

High Availability in Kubernetes. Kubernetes is already designed to… | by Gaurav Kaushik | Apr, 2021 | Medium

admin 5 days ago in

Kubernetes is already designed to deploy Pods(containers) as Highly Available. But what if the user wants the kubernetes cluster itself as HIGHLY AVAILABLE.To accomplish this we need to have multiple Control Plane nodes in the k8s cluster. Although, with multiple Control Plane nodes, comes multiple instances of ‘kube-api-cluster’ &with this arrangement there is a need of ‘Load Balancer’ to have communication with worker nodes using…

Draining & Uncordoning in a Kubernetes cluster | by Gaurav Kaushik | Apr, 2021 | Medium

admin 5 days ago in

In Kubernetes, while performing a Maintenance activity, sometimes it is needed to remove a k8s node from service. To do this, one can DRAIN the node. In this process containers running on the node(to be drained) will be gracefully terminated(& potentially rescheduled on another node).Draining can be performed on a Control Plane node as well as a Worker node. Command to Drain a Kubernetes node:kubectl…

Backup & Restore data in ‘etcd’. Backing up your kubernetes cluster data… | by Gaurav Kaushik | Apr, 2021 |...

admin 5 days ago in

Backing up your kubernetes cluster data by backuping up etcd is of crucial importance. etcd is the backend storage solution for the deployed Kubernetes cluster. All the K8s objects, applications & configuration are stored in etcd. 2. Restoring etcd can be done from a backup using the etcdctl snapshot restore command: Lets have a handson demo session on the above operations. Steps are as follows:…

Getting to know Kubernetes. Hello to all Engineers & DevOps… | by Gaurav Kaushik | Apr, 2021 | Medium

admin 6 days ago in

Hello to all Engineers & DevOps enthusiasts out there!I am starting this new series on one of the most famous Container Orchestration Platform: KUBERNETES The Questions arise: Kubernetes is a Container Orchestration platform which helps the user to manage, run and deploy the containers at scale.It is an Open source platform for managing containerized workloads & services that deploys both declarative configuration & automation. Kubernetes…

Introduction to Kubernetes. This article will provide you with a… | by Gaurav Kaushik | Apr, 2021 | Medium

admin 6 days ago in

This article will provide you with a brief introduction of Kubernetes, its Architecture & in the end the big picture on how all the components looks like when put together. First things first, The most basic deployment of Kubernetes will comprise of:A] The Controller nodeB] The Worker nodes (minimum of two) NOTE: The above recommendation is for basic ‘get to know’ basis. In real world…

Namespaces in Kubernetes – Gaurav Kaushik – Medium

admin 6 days ago in

Namespaces are a way to separate & organize objects in a cluster.Namespaces are basically virtual clusters backed by the same physical cluster.Kubernetes objects, such as pods & containers, live in namespaces. All clusters have a default namespace. This is used when no other namespace is specified. kubeadm also creates a ‘kube-system’ namespace for system components.a) List existing namespaces with kubectl: b) To check pods in…

Our journey to Kubernetes: Container design principle is your back bag | by VU Minh Quan | Coccoc Engineering Blog...

admin 2 weeks ago in

We spent two years, at CocCoc, to learn, build and bring a Kubernetes (K8s) cluster on bare-metal to production. Building K8s is a hopeful journey for our team, we were excited to introduce it to our beloved developers. We tell others how cool it is, encourage them to containerize their application and move to K8s. But slowly I realize that it’s not that important what…

Prepare and Build Production Environment for Kubernetes with kubeadm | by [email protected] | Apr, 2021 | Medium

admin 2 weeks ago in

Image: https://www.ovh.com/blog/why-ovh-managed-kubernetes/ Basically I am concentrating what’s been said on the official Kubernetes webpage here, so you can refer back for more detailed information. Having Kubernetes up and running on a server, you need, There are three ways listed on the official website to setup Kubernetes and three container runtime choices. In this post, I will use docker as container runtime and kubeadm to setup…

Configure an NFS Storage Class on an Existing KubeSphere Cluster and Create a PersistentVolumeClaim | by KubeSphere | Mar, 2021...

admin 3 weeks ago in

In my last article, I talked about how to use KubeKey to create a Kubernetes and KubeSphere cluster together with NFS storage. In fact, KubeSphere provides you with great flexibility as you can use KubeKey to install NFS storage when you create a cluster while it can also be deployed separately on an existing cluster. KubeSphere features a highly interactive dashboard where virtually all the…