A Smart Home from Scratch
I bought my first house at the start of the COVID-19 pandemic. Having been built in the early 70’s, it was going to need a lot of work to bring… Read more »
Category: linux
Blocking access to an ip address
Sometimes you need to block access to a specific ip address for test purposes – for instance to simulate unavailability of a web-service. Here’s how to do it on macOS… Read more »
API rate-limiting with HAProxy
We typically deploy REST APIs behind a HAProxy reverse proxy. We often need to enforce SLAs and protect those APIs from being flooded with too many concurrent requests. In this… Read more »
Minimal web server docker containers
Introduction We often need a simple web server as a Docker container to serve up static content (HTML or an Angular app etc) or a minimal php web app. So… Read more »
git workshop
Introduction In this post, we’ll cover the basics of using the git source control system, which has emerged as the dominant tool in this space (especially since Microsoft paid $7.5B… Read more »
Postgres-BDR + Docker: shared-nothing multimaster-replication databases made easy
Postgres-BDR + To achieve fault tolerance, you need redundant systems. There are two basic approaches to redundancy, active-standby or active-active. Active-standby Active-standby means that in the event of failure of the active… Read more »
Fault-tolerant ESX datastores for free
Preamble: NFS works great for ESX datastores. Its a whole lot easier to manage than iSCSI and although iSCSI is generally considered to perform better, we find that the flexibility… Read more »
Weird racing clock problem on VMWare Linux Guests
A while back we installed a new Dell server with a low-power Xeon 3GHz L3110 CPU to run some other essential network infrastructure. We chose the specific server configuration because… Read more »