Generate yaml file from existing Kubernetes resources of cluster?
Rajesh KumarI’m a DevOps/SRE/DevSecOps/Cloud Expert passionate about sharing knowledge and experiences. I have worked at Cotocus. I share tech blog at DevOps School, travel stories at Holiday…
Kubernetes FAQ
Question 1 – Add containers to a Kubernetes pod on runtime or Allow containers to be added to a running pod Answer: Adding or removing containers to…
How to delete/remove/clean existing corrupted or old kubeadm kubernetes clusters setup?
RHEL / Centos Ubuntu How to remove or cleanup kubernetes worker nodes in Centos 7? How to remove or cleanup kubernetes worker nodes in Ubuntu? Rajesh KumarI’m…
Setting up Kubernetes Clusters using Kubeadm Manual way in RHEL 7 / Centos7
What is Kubeadm? Kubeadm helps you bootstrap a minimum viable Kubernetes cluster that conforms to best practices. Kubeadm is a tool built to provide kubeadm init and…
Setting up Kubernetes Clusters using Kubeadm Manual way in Ubuntu 16.04 Xenial
What is Kubeadm? Kubeadm helps you bootstrap a minimum viable Kubernetes cluster that conforms to best practices. Kubeadm is a tool built to provide kubeadm init and…
Kubernetes Errors: weave-net pod CrashLoopBackOff
Errors Solutions https://stackoverflow.com/questions/39872332/how-to-fix-weave-net-crashloopbackoff-for-the-second-node Rajesh KumarI’m a DevOps/SRE/DevSecOps/Cloud Expert passionate about sharing knowledge and experiences. I have worked at Cotocus. I share tech blog at DevOps School, travel…
Kubernetes Errors: Kubernetes nodes are in ‘”network not ready” & “No networks found”
Errors Solutions https://stackoverflow.com/questions/47107117/how-to-debug-when-kubernetes-nodes-are-in-not-ready-state https://stackoverflow.com/questions/50085323/kubernetes-worker-node-staying-in-notready-state Rajesh KumarI’m a DevOps/SRE/DevSecOps/Cloud Expert passionate about sharing knowledge and experiences. I have worked at Cotocus. I share tech blog at DevOps School,…
Kubernetes Error: kubeadm related errors and solutions
Error 1 Error 1 Error 2 Error 3 Solutions 3 Error 4 Solutions 4 Rajesh KumarI’m a DevOps/SRE/DevSecOps/Cloud Expert passionate about sharing knowledge and experiences. I have…
Kubernetes supports Windows containers
With the release of Kubernetes v1.14, Windows Server node support has officially graduated from beta to stable! This support enables developers and operators with Windows Server based…
Kubernetes volume hostPath explained with examples
The hostPath volume mounts a resource from the host node filesystem. the resources could be directory, file socket, character, or block device. These resources mu A hostPath…
Kubernetes volume emptyDir explained with examples
Here are the following facts for emptyDir storage type in Kubernetes An emptyDir volume is first created when a Pod is assigned to a Node and initially…
Working with multiple virtual Kubernetes clusters aka Namespaces
Kubernetes supports multiple virtual clusters backed by the same physical cluster. These virtual clusters are called namespaces. Namespaces ca be used in multiple environment with many users…
How to check Containers readiness inside a pod using readinessProbe?
A Probe is a diagnostic performed periodically by the kubelet on a Container. To perform a diagnostic, the kubelet calls a Handler implemented by the Container. There…
How to check Containers health inside a kubernetes pod using livenessProbe?
A Probe is a diagnostic performed periodically by the kubelet on a Container. To perform a diagnostic, the kubelet calls a Handler implemented by the Container. There…
Do you know Container Linux (CoreOs) and Tectonic journey towards OpenShift?
The CoreOS corporation was acquired by Red Hat in May 2018 for $250 million; post-acquisition, the main enterprise Container Linux distribution, combined with Red Hat’s similar Project…
Certified Kubernetes Administrator CKA Exam Curriculum
Certified Kubernetes Administrator CKA Exam Curriculum Reference https://www.cncf.io/certification/cka/ https://github.com/certifications-tutorials/kubernetes-curriculum Rajesh KumarI’m a DevOps/SRE/DevSecOps/Cloud Expert passionate about sharing knowledge and experiences. I have worked at Cotocus. I share…
How to Autoscale pods based on CPU/Memory in Kubernetes?
CPU Based Scaling With Horizontal Pod Autoscaling, Kubernetes automatically scales the number of pods in a replication controller, deployment or replica set based on observed CPU utilisation….
List of Best Alternatives of Kubernetes
Here are some of the known best alternative of Kubernetes which incudes. Docker Swarm A swarm is a group of machines that are running Docker and joined…
Alternative of Docker in Kubernetes
Since v1.6.0, Kubernetes has enabled the use of CRI, Container Runtime Interface, by default. The container runtime used by default is Docker, which is enabled through the…
How to setup Kubernetes Dashboard in EKS using NodePort?
How to setup Kubernetes Dashboard in EKS using NodePort? Step 1: Deploy the Dashboard# Deploy the Kubernetes dashboard to your cluster: [code]kubectl apply -f https://raw.githubusercontent.com/kubernetes/dashboard/master/src/deploy/recommended/kubernetes-dashboard.yaml[/code] # Deploy…
What is Annotations in Kubernetes?
What is Annotations in Kubernetes? There are two way using you can attach metadata to Kubernetes objects. labels annotations Kubernetes annotations is used to attach arbitrary non-identifying…
What is EKS and How EKS can help you?
In simple line, Amazon EKS is generally available, bringing fully-managed Kubernetes to AWS. Amazon launched Amazon EKS in November at its re:Invent 2017 conference. Till the time…
Kubernetes minikube errors and Solutions
Error 1 – Error starting host: Error getting state for host: machine does not exist [plain] <p style=”font-weight: 400;”>D:\kubernete>minikube-windows-amd64.exe start –kubernetes-version=”v1.8.0″ –vm</p> <p style=”font-weight: 400;”>-driver=”virtualbox” –alsologtostderr</p> <p style=”font-weight:…
Top 10 DevOps Tools which is mostly used by DevOps Engineers | DevOpsSchool
Introduction “DevOps” is an emerging model that allows effective collaboration of development and Operations team so that they can build, test, and release software faster and more…