Ansible inventory in one remote machine using command-line
You can specify inventory file host path or comma separated host list. Except “localhost”, you can always specify a inventory using “-i INVENTORY” or –inventory=INVENTORY. Also, there…
How to pass http proxy to ansible using environment variables?
It is quite possible that you may need to get package updates through a proxy, or even get some package updates through a proxy and access other…
PHP Tutorial for Beginners
PHP FRONT TO BACK What is PHP?:- PHP: Hypertext Preprocessor(Recursive Acronym)Server-Side Programming/Scripting LanguageCan be embedded directly within HTML (<?php?>)Files use a “.php” file extension How Does PHP…
Pod status is in continous Terminating state but rc and deploy got deleted
Pod status is stuck in Terminating state but replicationController and deployment got deleted. To solve this issues, please follow a commands below; Errors Solutions Rajesh KumarI’m a…
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 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 have worked at Cotocus. I share tech…
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 have worked at Cotocus. I share tech blog at DevOps School, travel stories…
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…
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 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…
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…
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….
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…
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…
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…
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…
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 have worked at Cotocus. I share tech blog at DevOps School, travel stories…
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 have worked at Cotocus. I share tech blog at DevOps School, travel stories at…
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 have worked at Cotocus. I share tech blog at DevOps School, travel stories at…
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 have worked at Cotocus. I share tech blog at DevOps…
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 have worked at Cotocus. I share tech blog at DevOps School, travel stories…
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 have worked at Cotocus. I share tech blog at DevOps School, travel stories at…
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 have worked at Cotocus. I share tech blog at DevOps School, travel stories at…
Kubernetes Commands: kubectl run – Tutorials and Examples
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 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…