Micro Services

Kubernetes Cluster with Raspberry Pis

  • Charlie Walker
  • May 22, 2019

UPDATED as of May 22, 2019   This is the first post in our Pi-IoT post series. Technology Raspberry Pi 3 HypriotOS Kubernetes Flannel Credit where Credit is Due I owe a big thanks to the fine folks over at Hypriot for all their work in this area. Their initial post on this subject was […]

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PI-IoT Overview

  • Chip Dickson
  • May 22, 2019

Overview (UPDATED -5/22/2019) In the coming months the SUM Global team will be creating a series of posts that will build out a Kubernetes cluster  on 6 Raspberry Pi 3s (RPi). It will utilize persistent volumes and have html based load balancing. We will utilize GlusterFS for the volume management. We are building our own […]

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DevNexus 2018 Thank you!

  • Chip Dickson
  • March 1, 2018

Thank You! To all the good folks that attended DevNexus 2018, the speakers, all the volunteers and AJUG that put this one every year. Thank you. We, as a company, have been attending for years, and always come away energized and excited about what we do. This year Charlie and I decided to give a […]

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Raspberry Pi: Kubernetes vs Swarm

  • Charlie Walker
  • July 28, 2017

Overview We continue building out our IoT Pi project with a small backtrack. In a previous post, we created a cluster of Raspberry Pis using Kubernetes. Life with k8s was great until instability set in. It appeared that most of the issues were with the network driver Flannel. we experienced Lost/Unrecoverable nodes Kernel panics Network […]

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RPi GlusterFS Install

  • Chip Dickson
  • May 8, 2017

GlusterFS and RPi Overview We continue building out our IoT Pi project by adding volume storage that our Kubernetes cluster can use. This is a brief summary of the steps to create a glusterfs endpoint, Mounting the GlusterFS system on our Raspberry PIs and making them available to our Swarm. For this exercise we are […]

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Angular, Keycloak and Wildfly: Tying It All Together

  • Charlie Walker
  • May 10, 2016

[thumbnail target=”_self” src=”https://mlwsfn3yh4km.i.optimole.com/w:auto/h:auto/q:55/http://sumglobal.com/wp-content/uploads/2016/05/AngularKeycloakWildfly.png”] In previous posts, we have: Used vagrant to create a development environment Secured REST services with Keycloak You can find the code on our GitHub site: https://github.com/sumglobal Now let’s use Keycloak and AngularJS to create a secure web application Once the REST services are secured, we will use Keycloak’s javascript adapter to secure the web application. […]

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Securing a REST service with Keycloak

  • Charlie Walker
  • February 4, 2016

How Can We Secure a Microservice? In a traditional web application, a server side web tier is used to authenticate the user.  An HTTP session is then created containing the authentication and user details. The security context is propagated between the tiers within the application server so there’s no need to re-authenticate the user.  With […]

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