txToken is a small high performance microservice utility container. txToken is used for adding JSON Web Token based security to existing or new API development. txToken is specifically for systems that communicate in JSON over HTTP. txToken is called from a client with a JSON post body and passes received JSON to a remote endpoint. JSON retrieved from a remote endpoint is used to create a JWT token with an HS256 symmetrically encrypted signature.

Overview

We live in a world of process isolation and tools that make utilizing it extremely simple, with apps like Docker we can perform dependency management with dependency isolation. As I am slowly becoming a fanboy of containerization, I look forward to the day when typing ps on my local workstation or remote server is nearly synonymous with commands like docker ps or kubectl get services.

Case: Cassandra development and your local workstation.

I grew up on emacs. One of my first jobs I sat down at a terminal and was editing some files with pico, it’s what I knew since I used that fantastic email client pine. I was quickly told by my the lead developer that I need to use a real text editor if I’m going to progress in my career. He told me I need to try emacs, and after suffering through a few weeks of memorizing multi command-char sequences and training the muscle memory in my pinky to perform bizarre contortions of my left hand just to save my file, I became a convert. I found out a few months later that the developer who convinced me to use emacs was a vi user all along. I think I was a victim of a cruel joke or hazing ritual, but I learned to love emacs, and when I am not coding in a desktop IDE (IntelliJ) then I am using emacs.

• Deeper Reading and Resources
  • Free Courses
  • Paid Courses
• Prerequisites
• Test Installation
• Get some status
  • Architecture
• Create a Deployment
• Useful Commands

Deeper Reading and Resources

Free Courses

• Official Kubernetes Tutorials
• Udacity: Scalable Microservices with Kubernetes
• Kubernetes The Hard Way For anyone planning to support a production Kubernetes cluster and wants to understand how everything fits together.

Paid Courses

• Lynda: Learning Kubernetes
• Lynda: Kubernetes: Native Tools
• Udemy: Learn DevOps: The Complete Kubernetes Course
• Udemy: Learn DevOps: Advanced Kubernetes Usage

Prerequisites

• Install Docker
• Install Virtualbox
• Install Kubectl
• Install Minikube

Test Installation

$ minikube version
minikube version: v0.25.0

$ minikube start
Starting local Kubernetes v1.9.0 cluster...
Starting VM...
Getting VM IP address...
Moving files into cluster...
Setting up certs...
Connecting to cluster...
Setting up kubeconfig...
Starting cluster components...
Kubectl is now configured to use the cluster.
Loading cached images from config file.

$ minikube addons list
- addon-manager: enabled
- coredns: disabled
- dashboard: enabled
- default-storageclass: enabled
- efk: disabled
- freshpod: disabled
- heapster: disabled
- ingress: disabled
- kube-dns: enabled
- registry: disabled
- registry-creds: disabled
- storage-provisioner: enabled


# enable heapster for CPU and mem
$ minikube addons enable heapster
heapster was successfully enabled

# open the dashboard (in a browser)
$ minikube dashboard

Get some status

# are we running a cluster?
$ kubectl cluster-info
Kubernetes master is running at https://192.168.99.100:8443

# we should have a minikube node
$ kubectl get nodes
NAME       STATUS    ROLES     AGE       VERSION
minikube   Ready     <none>    2d        v1.9.0

Architecture

Read Kubernetes Basics for a better understanding.