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Thomas Stringer
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Azure Linux VM SSH Error - Permission denied (publickey)

When you are working with Linux VMs (IaaS) in Azure, the most common way to access the VM is through Secure Shell (SSH). A common issue when you’re trying to SSH into your Linux VM for the first ti...

AKS StorageClass Objects and Provisioners

Storage (typically) plays a large role in software systems. With Kubernetes that is, of course, no different. The way Kubernetes handles storage can be a little confusing, especially in cloud-provi...

Azure CLI Tips and Tricks

As a software engineer, I’m working with Azure on a daily basis. Like most things in my daily computing life, I choose the terminal (and keyboard) over a GUI (and mouse). My development and interac...

Azure Active Directory Service Principals and Permissions from the Azure CLI

A lot of us, especially in the non-Windows world, rely heavily on the Azure CLI to do our day-to-day jobs: As engineers, developers, administrators, etc. When dealing with Azure, you are destined t...

Simple vs Oneshot - Choosing a systemd Service Type

This post is intentionally thorough, but if you’re just looking for a summary and when to use which service type, jump down below. When you are creating your systemd service, choosing a service ty...

Why Feature Flags Are Great

The rhythm that we develop software is at a high velocity, and as a software engineer I really like to take a step back and think about what works really well, and what doesn’t work really well. In...

Kubernetes Application Upgrade Synchronization With Helm

There is a long list of benefits to running applications on Kubernetes, but complexity of the application lifecycle can come along with this added layer. Upgrading software is one of the most compl...

Connect Kubernetes Applications to Azure Resources with Managed Service Identities

Authentication is a difficult problem, and even in a cloud-first/cloud-native world it is still a tough problem to solve. A feature in Azure that makes this much easier to approach is Managed Serv...

Why I Prefer systemd Timers Over Cron

systemd has become a mainstay for the Linux world, but one of the things that still seems to stick around is cron jobs. It’s understandable, as cron is a tool that we have been using for a long tim...

Dump Manifests for all Revisions for a Helm Release

Being able to diagnose what changed in a Helm chart is an important requirement. One of the tools that we can use to see what exactly Helm is deploying to our Kubernetes cluster is by running helm ...