Kubernetes

How do you access the etcd that is being used by the OpenShift started by oc cluster up or using minishift. If you are using minishift then get docker environment access of the minishift VM by running following commands. eval $(minishift docker-env) && eval $(minishift oc-env) Exec into the container named origin that runs OpenShift and all the needed services. $ docker exec -it origin bash First install the etcdctl needed to talk to etcd. [root@surajd origin]$ yum -y install etcd Get into the directory where all the certs and keys are available. ...

There is no easy way to change namespace in Kubernetes using kubectl command line utility. But here are some commands that you can alias in your bashrc file so that it’s just a single command that you can use to change the namespace in the Kubernetes cluster. Change namespace Let’s see step by step what goes in to change the namespace. So the first step is to find the context. A context element in a kubeconfig file is used to group access parameters under a convenient name. Each context has three parameters: cluster, namespace, and user. By default, the kubectl command-line tool uses parameters from the current context to communicate with the cluster. Read more. ...

This post is very specific to OpenShift and how you can have an application exposing prometheus metrics to be scraped by a prometheus running in the same cluster. Requirements Setting up cluster I have done it using the oc cluster up, read about how to do this here. You could also setup a local OpenShift cluster by running minishift, read about setting up minishift here. Downloading Kedge The configurations defined for setting up this cluster is written in a format that is understood by a tool called Kedge. This makes configuration easier to understand and edit. So for using this setup download Kedge and put it in your path as explained here. ...

I am doing Kubernetes native development using minikube. And for doing that I had to download a Container image that is available in internally hosted private container registry. On the configuration side of doing that you will need to create Kubernetes Secret of type docker-registry. And now refer that secret you just created in your Pod manifest under pod.spec.imagePullSecrets. For more info follow the tutorial in Kubernetes docs on Pull an Image from a Private Registry. ...

I wanted to try out Standalone Kubelet Tutorial of Kelsey Hightower by myself but I could not follow it as it is, because it was firstly on GCE and secondly it uses CoreOS, but since I am very familiar to Fedora I thought of following that tutorial on it. To get a quick setup of a fresh Fedora machine use Vagrant. I have used Vagrantfile available here. This blog is only replacement of section Install the Standalone Kubelet in tutorial. ...

List of all the event reports from Kubernetes Bangalore meetup. April 2017 May 2017 June 2017 July 2017 Kubernetes 2nd Birthday Celebration August 2017 September 2017 October 2017 November 2017

Following is the list of all the places you can learn Kubernetes from: Scalable Microservices with Kubernetes - Video tutorial Fundamentals of Containers, Kubernetes, and Red Hat OpenShift - Video tutorial Kubernetes By Example - DIY tutorial Learn Kubernetes using Interactive Browser-Based Scenarios - DIY tutorial in your own web browser Interactive Learning Portal for OpenShift - DIY tutorial in your own web browser Kubernetes docs - Textual DIY docs Kubernetes API reference v1.6 OpenShift docs - Textual DIY docs

This edition of meetup was held at Nexus Ventures by folks at OpenEBS on July 8th 2017, which started on a lovely Saturday morning. Kiran Mova set the floor rolling with his talk on Hyperconverged version of OpenEBS with Kubernetes. Where he talked about containerized storage vs traditional storage, instead of building clustering into OpenEBS how they are leveraging Kubernetes’s capabilities to do clustering. He also explained difference between various storage providers viz. Portworx, StorageOS, Rook, GlusterFS, OpenEBS, etc. ...

“One does not simply deploy containers to production” With the rising craze around the container community in Bangalore and relative lack in awareness around different container technologies like Kubernetes and OpenShift, an effort was made in imparting knowledge in this direction. So, this time around newbies were targeted for the Kubernetes Meetup. With the above objective, it was decided to have a Kubernetes 101 workshop at Red Hat Bangalore office on May 21, 2017 to familiarize people with concepts of Kubernetes and OpenShift and their usage and relevance as container orchestration tools for managing application deployments. ...

I want to show how you can enable Kubernetes in your day to day development workflow. So that you get the feel of production deployment locally from day 1. I have a flask application which I am working on. The basic directory structure looks like this: $ ll total 24 -rw-rw-r--. 1 foo foo 427 Apr 23 16:23 app.py -rw-rw-r--. 1 foo foo 201 Apr 23 16:55 docker-compose.yml -rw-rw-r--. 1 foo foo 363 Apr 23 16:21 Dockerfile -rwxrwxr-x. 1 foo foo 82 Dec 5 19:41 entrypoint.sh -rw-rw-r--. 1 foo foo 3010 Dec 5 19:41 README.adoc -rw-rw-r--. 1 foo foo 11 Dec 5 19:41 requirements.txt You can find all of these files in this github repo. ...