modern full-featured open source secure mail server for low-maintenance self-hosted email

https://github.com/mjl-/mox

Interesting article describing how dns query works in k8s https://www.nslookup.io/learning/the-life-of-a-dns-query-in-kubernetes/

Good guide for begginers about IAM https://dev.to/aws-builders/a-beginners-guide-to-aws-identity-and-access-management-iam-4j5c

Within any organization, API producers and consumers need to stay in sync about the schemas that will be used for communication among them. Especially as the number of APIs and related producers and consumers grow in the organization, what may start with simply passing around schemas among teams will start to hit scaling challenges

An API/Schema registry - stores APIs and Schemas.

https://github.com/apicurio/apicurio-registry

Enterprises now often use event streaming as the source of truth and as an information-sharing mechanism in microservices architectures. This creates the need to standardize event types and share those standards across the enterprise. Event schema registries are commonly deployed but the existing offerings tend to be specialized to a single broker such as Apache Kafka or Azure Event Hub. They also fall short of conveying rich documentation about event types that goes beyond simple schema definitions.

EventCatalog is an open-source project that provides something we often see businesses building for themselves: a widely accessible repository of documentation for events and schemas. These describe the role the events play in the business, where they belong in a business domain model and which services subscribe and publish them. If you're looking for a way to publish event documentation to your organization, this tool might save you the trouble of building it yourself.

https://github.com/boyney123/eventcatalog

Gitleaks is an open-source SAST (static application security testing) command line tool for detecting and preventing hardcoded secrets like passwords, API keys and tokens in Git repositories. It can be used as a Git pre-commit hook or in the CI/CD pipeline. Our teams found Gitleaks to be more sensitive than some of the other secret-scanning tools. Gitleaks utilizes regular expressions and entropy string coding to detect secrets. In our experience, the flexibility to supply custom regex along with entropy coding allowed the teams to better categorize secrets based on their needs. For example, instead of categorizing all API keys as "generic-api-key," it allowed categorization as specific "cloud provider key."

https://github.com/gitleaks/gitleaks

Steampipe is an open-source tool that lets you instantly query cloud services like AWS, Azure and GCP with SQL. With 100+ plugins and built-in support for creating dashboards, Steampipe makes it trivial to connect live cloud configuration data with internal or external data sets and create security or compliance dashboards. We've enjoyed working with Steampipe and created several such dashboards with AWS cloud configurations.

https://github.com/turbot/steampipe

Excellent article on how services work in k8s https://dev.to/danielepolencic/learn-why-you-cant-ping-a-kubernetes-service-3nlm

Automatically cordon and drain Kubernetes nodes based on node conditions

https://github.com/planetlabs/draino

This is a place for various problem detectors running on the Kubernetes nodes.

https://github.com/kubernetes/node-problem-detector

In a recent Dev Interrupted article, Kubernetes co-founder Brendan Burns discussed the origins and growth of the open-source project. Kubernetes, a container orchestrator, was born out of the need to simplify the process of building, deploying, and maintaining distributed systems. Burns, along with co-founders Joe Beda and Craig McLuckie, were inspired by Google's internal system called Borg and wanted to create something similar for the larger development community. Docker played a crucial role in popularizing the concept of containers, which then paved the way for Kubernetes' success.

https://devinterrupted.substack.com/p/how-open-source-enabled-kubernetes

Jan Kammerath, discusses the potential pitfalls of using Kubernetes and Kafka in a medium-sized software company. The author shares a consulting experience where the CEO of a software company called for advice due to low availability (87%) and rising operational costs. The company had Kubernetes and Kafka implemented in its infrastructure, but it struggled to manage them efficiently.

https://medium.com/@jankammerath/how-kubernetes-and-kafka-will-get-you-fired-a6dccbd36c77

This blog post discusses the growing trend of Large Language Models (LLMs) and their impact on various use cases. One specific application discussed is K8sGPT, an AI-based Site Reliability Engineer (SRE) that runs inside Kubernetes clusters. It scans, diagnoses, and triages issues using SRE experience codified into its analyzers. LocalAI, another project, is a drop-in replacement API for local CPU inferencing. Combining K8sGPT and LocalAI enables powerful SRE capabilities without relying on expensive GPUs.
https://itnext.io/k8sgpt-localai-unlock-kubernetes-superpowers-for-free-584790de9b65

This article explores Kubernetes Resource Manager and the Google Config Connector, comparing them to Terraform, a popular infrastructure orchestration tool. Kubernetes, an open-source container orchestration tool, has gained market dominance with its Custom Resource Definitions (CRDs), which allows managing Google Cloud resources through Kubernetes using CRDs. Config Connector, an add-on to Kubernetes, can potentially replace Terraform in some workflows. However, the author's experiment shows that while Config Connector can be used to deploy a Google Cloud landing zone, it has limitations compared to Terraform, particularly in handling interdependencies based on values unknown until a resource is created.

In conclusion, the author suggests a hybrid approach, with Terraform for platform-centric deployments and Config Connector for application-centric deployments. While Terraform's flexibility and provider support make it useful for organizations operating in multiple clouds, Config Connector has a compelling place in application-centric deployments where small amounts of infrastructure are deployed in support of Kubernetes-based services.

https://medium.com/cts-technologies/are-terraforms-days-numbered-a9a15ec0435a

K8sGPT gives Kubernetes Superpowers to everyone
k8sgpt is a tool for scanning your kubernetes clusters, diagnosing and triaging issues in simple english. It has SRE experience codified into it’s analyzers and helps to pull out the most relevant information to enrich it with AI.

https://k8sgpt.ai/

This post provides a guide to configuring and installing a multi-cluster observability solution for cloud computing environments like AWS, Azure, and Google Cloud. The solution includes Grafana, Prometheus, Thanos, and Loki for monitoring applications and microservices in multi-cluster environments. The guide assumes prior experience with AWS S3, Policy, IAM, EKS, and Kubernetes. It covers the creation of IAM policies and roles, the installation of Helm, Bitnami's Helm charts, and EKS, AWS CLI, eksctl, and kubectl tools. The guide details the process of setting up multi-cluster observability with metrics monitoring using kube-prometheus and Thanos and log monitoring using Grafana Loki and Promtail.

https://medium.com/@bahungxt/multi-cluster-observability-solution-with-prometheus-thanos-loki-and-grafana-5d5be42635e8

Nothing can be free forever or the story how Oracle took back a free cloud VMs
https://armin.su/oracle-cloud-and-loss-of-data-in-kubernetes-cluster-198d88181829

🔥 Open source static (serverless) status page. Uses hyperfast Go & Hugo, minimal HTML/CSS/JS, customizable, outstanding browser support (IE8+), preloaded CMS, read-only API, badges & more.

https://github.com/cstate/cstate

🎨 Diagram as Code for prototyping cloud system architectures

https://github.com/mingrammer/diagrams