I have broken my Kubernetes cluster

Categories: Kubernetes
My Kubernetes cluster is down My single-node baremetal cluster using kubeadm and on calico networking plugin is down (link to the article here). The machine won't startup anymore and there is very mysterius error from cephlib reporting that it was unable to start. Few days ago I was playing with rook (https://github.com/rook/rook). Rook uses ceph to give you easy to use persistent volume experience. Everything was fine at this point until I started doing research on advanced Prometheus configuration.

Read More →

Home Kubernetes cluster in 15 minutes

Categories: Kubernetes
Description This guide will let you install Kubernetes 1.8 with RBAC enabled on so called “baremetal” along with Calico network plugin. Although there is nothing specific to baremetal, that’s what I will use to install it. This cluster can be then used for small projects, once exposed to the Internet. That’s excatly what I use it for :) Requirements Spare machine with Ubuntu installed and at least a few GB of RAM.

Read More →

Multi-node kubernetes cluster on Vagrant in five minutes

Categories: Kubernetes
This is a guide for anyone that wants to setup multi-node kubernetes cluster on PC or laptop without significant amounts of time and money on kubernetes-the-hard-way ;) This is one of the fastest ways to have multi-node cluster up and running for learning purposes. It will use coreos and vagrant to spin up the cluster. Time required to finish the tutorial 5 minutes plus 30 minutes of waiting Final setup one master node one etcd (on separate node) 3 worker nodes Kubernetes 1.

Read More →