#54: DevOps Exercises

🎧 PODCAST/WEBINAR OF THE WEEK

In this lightning talk Matthias will give an introduction to Pyrra, an open-source project that aims to make Service Level Objectives (SLOs) with Prometheus manageable, accessible, and easy to use for everyone. Matthias will walk you through some examples for creating an error ratio SLO and a latency SLO. After this talk you will be confident to start to implementing SLOs in your organization with an open source project that builds on the beloved open source project Prometheus.

📖 POSTS OF THE WEEK

All you need to know about the DORA metrics, and how to measure them
The DORA metrics are a set of metrics that measure the quality and velocity of software delivery of an engineering organization. By measuring and continuously iterating on these metrics, engineering teams can deliver better software to their customers faster, and achieve significantly better business outcomes.
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"Six critical blindspots while securing Argo CD" - This article shows the core strategies for securing an Argo CD deployment and keeping you ahead of potential exposures. If you are new to Argo CD, you may want to read it side-by-side with the Argo CD security manual - Read more »

"GitHub Actions security best practices" - GitHub Actions is an increasingly popular CI/CD platform. They offer powerful and easy-to-access features to build automation right into any GitHub repository. However, they also require special attention to avoid any compromise. Here are the best practices to secure them - Read more »

"Why you should avoid Sealed Secrets in your GitOps deployment" - Eschew sealed secrets, start your GitOps practice right, and use a managed key service - Read more »

"Automate all the boring Kubernetes operations with Python" - In this article you will look at how you can leverage Kubernetes Python Client library to automate whatever annoying Kubernetes task you might be dealing with! - Read more »

"Extending applications on Kubernetes with multi-container pods" - In this article you will learn how you can use the ambassador, adapter, sidecar and init containers to extend yours apps in Kubernetes without changing their code - Read more »

"The differences between Docker, containerd, CRI-O and runc" - Docker kicked off the explosion in containers, but soon afterwards, the landscape seemed to explode with tools, standards and acronyms. So what is ‘docker’ really, and what do the terms like “CRI” and “OCI” mean? Why should you even care? Read on to figure it all out - Read more »

"Preventing tag mutation with kbld and Argo CD" - You’re probably aware that it is best practice not to use the latest tag when deploying to Kubernetes because that tag can be changed to point at a different image - Read more »

"The only Linux command you need to know" - The Linux cheat command is a utility to search for and display a list of example tasks you might do with a command - Read more »

📕 BOOK OF THE WEEK

Jordan Peterson is a psychologist whose writing combines science and common sense. One of his talents is his ability to articulate complex ideas to a wide audience. Regardless of whether you have a background in psychology or not, you will understand this book 💯
It covers his twelve rules for life, which are intended not only as a guide for life of the individual, but as a remedy for society’s present ills.

🛠 PROJECTS OF THE WEEK

Scout hunts for performance issues in your application and then pinpoints it directly to the line of code causing the issue. With a friendly user interface and a low overhead, Scout will give your dev team more time to build great applications - Read more »

This repo contains questions and exercises on various technical topics, sometimes related to DevOps and SRE. There are currently 2292 exercises and questions around Kubernetes, OpenShift, AWS, Terraform, CI/CD, etc - Read more »

Dragonfly is a modern in-memory datastore, fully compatible with Redis and Memcached APIs. Dragonfly implements novel algorithms and data structures on top of a multi-threaded, shared-nothing architecture. Dragonfly reaches x25 performance compared to Redis - Read more »

ttl.sh is an anonymous, expiring Docker container registry using the official Docker Registry image. This is a set of tools and configurations that can be used to deploy the registry without authentication, but with self-expiring images - Read more »

A CLI tool and Go library for generating a Software Bill of Materials (SBOM) from container images and filesystems. Exceptional for vulnerability detection when used with a scanner like Grype. It supports OCI and Docker image formats - Read more »

💼 OPEN JOBS OF THE WEEK