Daniel Watrous on Software Engineering

A Collection of Software Problems and Solutions

Browsing Category Software Engineering

Software Engineering

Using and troubleshooting etcd in kubernetes

etcd, https://coreos.com/etcd/, is a distributed key/value store and contains all details about a kubernetes cluster, such as resources and their states. How etcd is installed I install kubernetes, and etcd along with it, using kubespray https://github.com/kubernetes-incubator/kubespray Interacting with etcd etcd runs as a container. The startup script used by systemctl is /usr/local/bin/etcd, which has the… Continue reading

Software Engineering

Software Testing

I frequently hear people talk about unit tests when they actually mean something else. In some cases, I would think it was pedantic to argue about the specific meaning of a term like unittest, but in this case I think it often works against the Software Developer to use the term incorrectly. Below I provide… Continue reading

Software Engineering

Kubernetes bootcamp

Introduction Kubernetes (also written k8s) is a powerful container orchestration platform that works with Docker. This first video provides a high level explanation of how kubernetes differs from traditional application deployment and infrastructure management. Overview A kubernetes cluster is made up of masters and nodes. The masters are responsible for orchestration and the nodes host… Continue reading

Software Engineering

kubernetes overview

Kubernetes is getting a lot of attention recently, and there is good reason for that. Docker containers alone are little more than a developer convenience. Orchestration moves containers from laptop into the datacenter. Kubernetes does that in a way that simplifies development and operations. Unfortunately I struggled to find easy to understand high level descriptions… Continue reading