DevOps&SRE Library

Service Level Indicators

Introduction to SLI, examples, counterexamples and tips

https://blog.alexewerlof.com/p/sli

tofuenv

OpenTofu version manager inspired by tfenv

https://github.com/tofuutils/tofuenv

Martian Kubernetes Kit: a smooth-sailing toolkit from our SRE team

We’ve been using Kubernetes since before it was a “thing”, and as of 2023, we believe that it is still underutilized. In fact, it’s the best (and basically only real “at-scale”) solution for orchestrating Docker containers—or containers in general, after you’ve outgrown services like Heroku or Fly.io! That’s a bold claim, but it’s a belief backed up by our years of SRE experience. In this post, we’ll expand on that, and we’ll introduce a Kubernetes toolkit we already use and support for our clients, which simultaneously de-complexifies and highlights the benefits of Kubernetes.

https://evilmartians.com/chronicles/martian-kubernetes-kit-a-smooth-sailing-toolkit-from-our-sre-team

Healthchecks.io Hosting Setup, 2022 Edition https://blog.healthchecks.io/2022/02/healthchecks-io-hosting-setup-2022-edition Healthchecks.io Hosting, Questions and Answers https://blog.healthchecks.io/2022/05/healthchecks-io-hosting-questions-and-answers

Notes on Self-hosted Transactional Email

Since a little more than two months ago, Healthchecks.io has been sending transactional email (~300’000 emails per month) through its own SMTP server. Here are my notes on setting it up.

https://blog.healthchecks.io/2023/08/notes-on-self-hosted-transactional-email

Kubewatch: A Kubernetes Watcher for Observability and Monitoring

Kubewatch is a Kubernetes watcher that publishes notifications to available collaboration hubs/notification channels. It watches the cluster for resource changes and notifies you through webhooks.

https://medium.com/@seifeddinerajhi/kubewatch-a-kubernetes-watcher-for-observability-and-monitoring-d6dea1dbeb06 https://github.com/robusta-dev/kubewatch

Kubernetes And Kernel Panics

How Netflix’s Container Platform Connects Linux Kernel Panics to Kubernetes Pods

https://netflixtechblog.com/kubernetes-and-kernel-panics-ed620b9c6225

VictoriaMetrics: A Comprehensive Guide, Comparing It to Prometheus, and Implementing Kubernetes Monitoring https://medium.com/@seifeddinerajhi/victoriametrics-a-comprehensive-guide-comparing-it-to-prometheus-and-implementing-kubernetes-03eb8feb0cc2

Mastering AWS Lambda with Terraform: A Comprehensive Guide https://blog.awsfundamentals.com/aws-lambda-with-terraform

Scaling SRE Teams

Scaling teams of site reliability engineers comes with many challenges. Here, explore the challenges of scaling and review a successful scaling framework.

https://dzone.com/articles/scaling-sre-teams

A Spooky Performance Regression in AWS EBS Volumes https://www.dolthub.com/blog/2023-11-22-spooky-performance-regression-aws-ebs Christmas Come Early: An AWS EBS Performance Regression Update https://www.dolthub.com/blog/2023-12-08-christmas-come-early-ebs-performance-regression-update

GitOps Guide: ArgoCD vs Flux https://www.codereliant.io/gitops-guide-argocd-vs-flux

A deep dive into CPU requests and limits in Kubernetes

In this post, we are going to dive a bit deeper into CPU and share some general recommendations for specifying CPU requests and limits. We will also explore the differences between using the default policy (CFS quota) and the CPU Manager’s static policy. We are not going to consider memory resources in this post.

https://www.datadoghq.com/blog/kubernetes-cpu-requests-limits

Simplicity

In May 2009, Google hosted an internal "Design Wizardry" panel, with talks by Jeff Dean, Mike Burrows, Paul Haahr, Alfred Spector, Bill Coughran, and myself. Here is a lightly edited transcript of my talk. Some of the details have aged out, but the themes live on, now perhaps more than ever.

https://commandcenter.blogspot.com/2023/12/simplicity.html

A Glimpse into the Redesigned Goku-Ingestor vNext at Pinterest

Better performance, lower cost and less code complexity

https://medium.com/pinterest-engineering/a-glimpse-into-the-redesigned-goku-ingestor-vnext-at-pinterest-d68159473464

kube-job

Run one off job on kubernetes from the command line tool

https://github.com/h3poteto/kube-job

redb

A simple, portable, high-performance, ACID, embedded key-value store.

https://github.com/cberner/redb

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pr-agent

CodiumAI PR-Agent is an open-source tool for efficient pull request reviewing and handling.

https://github.com/Codium-ai/pr-agent

rot

Rot is an open source command line (CLI) tool for managing secrets.

https://github.com/candiddev/rot