🚀 DevOps & SRE Certification Program 📅 Starting: 1st of Every Month 🤝 +91 8409492687 🔍 Contact@DevOpsSchool.com

Kubernetes Errors: Kops related errors

Error 1 Error 2 Error 3 Error 4 Rajesh KumarI’m a DevOps/SRE/DevSecOps/Cloud Expert passionate about sharing knowledge and experiences. I am working at Cotocus. I blog tech insights at DevOps…

Read more »

Kubernetes Error: coredns – no route to host log & Failed to list & CrashLoopBackOff

Errors Solutions Rajesh KumarI’m a DevOps/SRE/DevSecOps/Cloud Expert passionate about sharing knowledge and experiences. I am working at Cotocus. I blog tech insights at DevOps School, travel stories at Holiday Landmark,…

Read more »

kubeadm error – kubelet isn’t running or healthy and connection refused

Errors Headlines Initial timeout of 40s passed dial tcp [::1]:10248: connect: connection refused failed with error: Get http://localhost:10248/healthz The kubelet is not running Solutions If you are on a systemd-powered…

Read more »

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 applications to containerize…

Read more »

Kubernetes Error – minikube – A firewall is likely blocking minikube from reaching the internet

If you are trying a start in minikube behind a firewall and getting following errors Solutions You need to set a proxy on a command line. macOS and Linux Windows…

Read more »

How to overwrite Existing AWS EC2 AMI with Packer?

USING FORCE_DEREGISTER ADDED IN V1.1.2, IT WAS VERIFIED WHETHER AWS EC2 AMI CAN BE OVERWRITTEN. THE PROCESS IS TO DELETE THE AMI WITH THE SAME NAME AND THEN CREATE A…

Read more »

Create AWS AMI policy, IAMgGroup and IAM user for Hashicorp Packer

This tutorails helps you to create a AWS AMI policy, IAMgGroup and IAM user for Hashicorp Packer execution so Packer should get only needed access than all. Step 1 –…

Read more »

Installing uDeploy Server 6.X in linux rhel 7.5

Install and Setup JDK 8 and JAVA HOME Install and Setup uDeploy Server 6.X How to start / Stop uDeploy server? Rajesh KumarI’m a DevOps/SRE/DevSecOps/Cloud Expert passionate about sharing knowledge…

Read more »

EKS cluster setup error: the server doesn’t have a resource type “services

When an Amazon EKS cluster is created, the IAM entity (user or role) that creates the cluster is added to the Kubernetes RBAC authorization table as the administrator (with system:master…

Read more »

How to destroy one specific resource from TF file in Terraform?

Terraform destroy is a command that allows you to destroy either a full stack (based on your TF files), or single resources, using the -target option. You can even do:…

Read more »

Continuous integration using Bamboo – Crash Course – 1 Day

Following are the agenda which, I am going to cover in next week session for continuous integration using Bamboo – Crash Course – 1 Day. Introduction of Bamboo with CI…

Read more »

Kubernetes PersistentVolume, PersistentVolumeClaim, volume using hostPath

pv.yaml $ kubectl create -f pv.yaml $ kubectl get pv pvc.yaml $ kubectl create -f pvc.yaml $ kubectl get pvc pod.yaml $ kubectl create -f pod.yaml $ kubectl get pods…

Read more »

Working with Kubernetes Cluster using Kubectl Part – 11 – Probes

container-probes.yaml Commands Rajesh KumarI’m a DevOps/SRE/DevSecOps/Cloud Expert passionate about sharing knowledge and experiences. I am working at Cotocus. I blog tech insights at DevOps School, travel stories at Holiday Landmark,…

Read more »

Working with Kubernetes Cluster using Kubectl Part – 10 – Pods Life Cycle

pod-restart-policy.yaml Rajesh KumarI’m a DevOps/SRE/DevSecOps/Cloud Expert passionate about sharing knowledge and experiences. I am working at Cotocus. I blog tech insights at DevOps School, travel stories at Holiday Landmark, stock…

Read more »

Working with Kubernetes Cluster using Kubectl Part – 9 – Multi Containers Pods

multicontainer-pod.yaml Rajesh KumarI’m a DevOps/SRE/DevSecOps/Cloud Expert passionate about sharing knowledge and experiences. I am working at Cotocus. I blog tech insights at DevOps School, travel stories at Holiday Landmark, stock…

Read more »

Working with Kubernetes Cluster using Kubectl Part – 7 – Labels

PodsToNodes.yaml CreatePodsWithLabels.yaml deployment-label.yaml service.yaml Commands Rajesh KumarI’m a DevOps/SRE/DevSecOps/Cloud Expert passionate about sharing knowledge and experiences. I am working at Cotocus. I blog tech insights at DevOps School, travel stories…

Read more »

Working with Kubernetes Pods & Deployment

deployment.yaml pod.yaml Rajesh KumarI’m a DevOps/SRE/DevSecOps/Cloud Expert passionate about sharing knowledge and experiences. I am working at Cotocus. I blog tech insights at DevOps School, travel stories at Holiday Landmark,…

Read more »

Kubernetes Commands: kubectl api-versions – Tutorials and Examples

deployment.yaml Rajesh KumarI’m a DevOps/SRE/DevSecOps/Cloud Expert passionate about sharing knowledge and experiences. I am working at Cotocus. I blog tech insights at DevOps School, travel stories at Holiday Landmark, stock…

Read more »

Kubernetes Commands: kubectl api-resources – Tutorials and Examples

POD.yaml Rajesh KumarI’m a DevOps/SRE/DevSecOps/Cloud Expert passionate about sharing knowledge and experiences. I am working at Cotocus. I blog tech insights at DevOps School, travel stories at Holiday Landmark, stock…

Read more »

Kubernetes Commands: kubectl run – Tutorials and Examples

Rajesh KumarI’m a DevOps/SRE/DevSecOps/Cloud Expert passionate about sharing knowledge and experiences. I am working at Cotocus. I blog tech insights at DevOps School, travel stories at Holiday Landmark, stock market…

Read more »

Kubernetes Commands: kubectl get – Tutorials and Examples

Listing and Inspecting your cluster, pods, services and more. kubectl cluster-info review status and roles kubectl get nodes Additional information about each node in the cluster. kubectl get nodes -o…

Read more »

Setup Kubernetes Cluster using kubeadm, calico and rbac in Ubuntu

Prerequisite Setup Master Node Setup aka Kubernetes Control Panel Setup Worker Node Setup Rajesh KumarI’m a DevOps/SRE/DevSecOps/Cloud Expert passionate about sharing knowledge and experiences. I am working at Cotocus. I…

Read more »

Create Google Kubernetes Engine(GKE) Cluster using command line

Rajesh KumarI’m a DevOps/SRE/DevSecOps/Cloud Expert passionate about sharing knowledge and experiences. I am working at Cotocus. I blog tech insights at DevOps School, travel stories at Holiday Landmark, stock market…

Read more »

Create Azure kubernetes Clustors(AKS) using command line

Rajesh KumarI’m a DevOps/SRE/DevSecOps/Cloud Expert passionate about sharing knowledge and experiences. I am working at Cotocus. I blog tech insights at DevOps School, travel stories at Holiday Landmark, stock market…

Read more »

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 volume mounts a…

Read more »

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 its empty A…

Read more »

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 spread across multiple…

Read more »

minikube error – VBoxManage.exe: error: DHCP server already exists

Error Message Solutions minikube stop minikube start Rajesh KumarI’m a DevOps/SRE/DevSecOps/Cloud Expert passionate about sharing knowledge and experiences. I am working at Cotocus. I blog tech insights at DevOps School,…

Read more »

minikube error – CrashLoopBackOff: secrets is forbidden: User “system:serviceaccount:kube-system:default”

$ minikube dashboard Temporary Error: unexpected response code: 503 Temporary Error: unexpected response code: 503 Temporary Error: unexpected response code: 503 Temporary Error: unexpected response code: 503 Solution Rajesh KumarI’m…

Read more »

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 are three types…

Read more »