Projects sharing features with Kubebuilder

The Prometheus Operator is a Kubernetes monitoring orchestrator and controller that manages Prometheus clusters and observability components through declarative custom resources. It functions as a custom resource controller that translates high-level Kubernetes resource definitions into the configuration files required by the underlying monitoring software. The project automates the deployment, scaling, and lifecycle of an observability stack, including the integration of components like Thanos and Alertmanager. It distinguishes itself by syncing monitoring targets, alerting rules, and scrape

Kube-rs is a Rust client library and runtime for interacting with the Kubernetes API server. It provides a type-safe interface for managing cluster resources and state, including a toolkit for defining custom resource definitions and a framework for building admission webhooks to validate or mutate API requests. The project distinguishes itself through a dedicated controller runtime that implements event-driven reconciliation loops to align actual cluster state with desired configurations. It utilizes a streaming system to monitor resource changes and synchronize remote states into a local qu

kro is a Kubernetes resource orchestrator and API abstraction layer that enables the definition of simplified custom API surfaces. It allows users to map high-level inputs to complex templates of underlying Kubernetes objects, effectively grouping interdependent resources into single, manageable units. The project differentiates itself by automating the generation of custom resource definitions and dedicated controllers from resource graph specifications without requiring manual Go code. It employs a dependency manager that uses directed acyclic graphs to coordinate the creation, readiness, a

Sample Controller is a reference implementation and developer toolkit for building custom controllers and operators to extend cluster capabilities with domain-specific resource types and reconciliation loops. It provides a foundational framework for defining, registering, and validating custom resource definitions and their instances to store domain-specific data within a cluster. The framework observes remote API servers for resource mutations, queueing discovered instances for asynchronous processing while listening for creation, update, and deletion events to trigger reconciliation logic.

The quarkus-operator-sdk is a Java extension and framework for building custom Kubernetes operators and controllers. It provides an operator framework that generates boilerplate classes, registers reconcilers, and automatically produces custom resource definitions, role-based access control rules, deployment manifests, and Helm charts directly from application code metadata. The framework supports compile-time configuration validation to catch errors before deployment, standard dependency injection wiring for clients and controllers, and static native image compilation for generating self-con

cookiecutter-django is a template-based project generator and production-ready scaffold for Django web applications. It functions as a boilerplate that injects user-defined variables into predefined file templates to automate the creation of a standardized directory structure and initial project configuration. The project provides a production blueprint that integrates a customizable user authentication system, environment-variable configuration, and a containerized development environment. It bundles Django with databases and task queues to ensure consistency across local and production work

Kubernetes controller for GitHub Actions self-hosted runners

This project is a Kubernetes controller that automates the issuance, renewal, and lifecycle management of TLS certificates. It functions as a native extension to the cluster API, using custom resource definitions and reconciliation loops to maintain the desired state of certificates and trust bundles across distributed services. By integrating directly with the cluster's admission control and secret storage systems, it ensures that cryptographic identities are consistently provisioned and available for application workloads. The project distinguishes itself through its extensive support for a

This project provides a standardized project directory structure and boilerplate templates for organizing data analysis and machine learning workflows. It serves as a reproducible analysis framework and workspace boilerplate designed to ensure consistency across data science projects. The template distinguishes between exploratory research in notebooks and reusable, testable logic in modular Python packages. It enforces a convention-based directory hierarchy that treats the analysis pipeline as a directed acyclic graph by separating raw, interim, and processed data. The framework covers a br

The logging operator is a Kubernetes-native controller designed to automate the deployment, configuration, and lifecycle management of log collection and routing infrastructure. By utilizing custom resource definitions, it provides a declarative framework for standardizing how container logs are captured, processed, and forwarded across distributed cluster environments. The project distinguishes itself through its support for multi-tenant logging architectures, allowing administrators to enforce namespace-scoped isolation for log collection and routing configurations. It employs a sidecar inj

Crossplane is a Kubernetes-based control plane framework that functions as a cloud resource orchestrator and infrastructure-as-code platform. It enables the management of heterogeneous infrastructure by extending the Kubernetes API to provision and maintain external cloud services through declarative configuration. By utilizing custom resource controllers, it continuously reconciles the state of external infrastructure with defined desired states, ensuring consistent deployment and lifecycle management across multiple cloud providers. The platform distinguishes itself through its composition-

This project is an ASP.NET Core solution template and boilerplate that implements a clean architecture pattern for building enterprise applications and web API backends. It provides a standardized project scaffold designed to separate business logic from infrastructure and user interfaces to ensure high testability and low coupling. The project features a database agnostic structure that allows for switching persistence providers without altering core business logic. It includes a command line tool for enterprise application bootstrapping, enabling the automated generation of project structur

Pulumi is an infrastructure-as-code framework that enables the definition, deployment, and management of cloud resources using general-purpose programming languages. It functions as a cloud resource orchestrator that coordinates the lifecycle of heterogeneous infrastructure by executing code to construct dependency graphs and reconciling the desired state against actual cloud environments. The platform distinguishes itself through a language-host runtime bridge that allows developers to use standard programming languages to define infrastructure, rather than relying solely on domain-specific

This project serves as a comprehensive educational repository and technical reference collection, documenting a wide range of software engineering practices and modern development technologies. It provides a structured learning path for developers, curating tutorials and practical examples that cover the full lifecycle of application development, from initial project scaffolding to deployment and maintenance. The repository distinguishes itself by offering deep technical insights into complex architectural patterns, including actor-based concurrency models for managing parallel tasks and cont

Argo is a cloud native CI/CD platform and Kubernetes workflow engine. It functions as a container pipeline orchestrator and job scheduler, managing multi-step sequences of containers as jobs using directed acyclic graphs within a cluster. The system acts as a progressive delivery controller, reducing release risk through automated Canary and Blue-Green deployment strategies. It provides declarative GitOps synchronization to mirror the state of a git repository directly into the cluster environment for continuous delivery automation. The platform covers a broad range of capabilities including

This project is a Go language library that provides a programmatic interface for interacting with the Kubernetes API server. It serves as a client for managing cluster resources, offering both typed interfaces for compile-time safety and dynamic interfaces for unstructured data and custom resource management. The library includes a controller framework designed for building event-driven automation. This framework utilizes informers to maintain local resource caches and rate-limited work queues to decouple event detection from state reconciliation. High availability is supported through a lead

The project is a declarative GitOps controller and package manager designed to automate the deployment and lifecycle management of Helm charts within a cluster. It continuously watches custom resources and external artifact sources, comparing the actual cluster state against desired declarations to drive reconciliation. Artifacts and manifests are retrieved from standard package repositories, Git sources, OCI registries, and object storage buckets. The system handles complex application delivery through dependency sequencing, automated failure remediation, and drift detection. It supports cro

The etcd-operator is a custom resource controller designed to automate the deployment, scaling, backup, and recovery of distributed key-value storage clusters on container orchestration platforms. By extending container orchestration APIs with custom resource definitions, the system manages multi-node database instances through declarative configuration files and a continuous controller reconciliation loop that drives cluster provisioning, scaling, and maintenance. The operator provides automated cluster member recovery, detecting unresponsive nodes and executing membership replacements to pr

Strimzi is a Kubernetes operator that automates the deployment, management, and lifecycle of Apache Kafka clusters on Kubernetes or OpenShift. It uses custom resource definitions and declarative YAML configuration to define Kafka cluster topology, broker placement, and security settings, with operator-based controllers that reconcile the desired state with the actual cluster state. The operator handles rolling updates during cluster upgrades or configuration changes to maintain availability and data integrity, and supports rack-aware broker scheduling across Kubernetes nodes and availability

Argo Workflows is a container-native workflow engine that functions as a Kubernetes custom resource controller. It orchestrates complex sequences of containerized tasks by executing them as directed acyclic graphs, allowing for dependency management and parallel processing within a cluster. The system extends the native Kubernetes control plane to manage the full lifecycle of automated processes, from initial triggering to final resource cleanup. The platform distinguishes itself through its controller-pattern reconciliation, which continuously monitors workflow states to align them with desi

Reloader is a Kubernetes custom controller designed to automate pod restarts and synchronize running workloads with external configuration stores. It functions as a configuration reloader that triggers rolling upgrades for pods whenever referenced ConfigMaps or Secrets are updated. The tool distinguishes itself by integrating with external secret managers, CSI drivers, and GitOps workflows to ensure workloads are restarted when secrets from external stores change. It utilizes targeted filtering via labels and annotations to control which resources or namespaces trigger restarts, and it can pa

This project is a collection of educational resources and step-by-step tutorials for Java backend development. It provides implementation guides for building web services and applications using the Spring Boot framework, focusing on the development of data streams and concurrent tasks. The repository includes technical walkthroughs for Kubernetes cluster automation, specifically regarding the creation of custom operators and admission controllers. It also serves as a manual for cloud native integration, covering the packaging of applications into containers and the use of distributed event me

Kyverno is a Kubernetes policy engine and cloud native governance tool. It functions as a policy-as-code framework that validates, mutates, and generates resources to enforce security and governance standards within a cluster. The project distinguishes itself through a declarative policy model that utilizes native Kubernetes custom resource definitions, allowing policies to be managed as standard cluster objects without custom code. It provides specific security capabilities for container image verification and signature validation to ensure only trusted images are deployed. Its broader capa

Sealed Secrets is a Kubernetes secret encryption tool and controller designed for GitOps security. It provides a mechanism to encrypt sensitive data into specialized resources that can be safely stored in public version control systems and decrypted only within a cluster. The system uses an asymmetric encryption manager to seal secrets with a public key, ensuring that only the corresponding private key held within the cluster can unseal them. It includes utilities for security key rotation, secret re-encryption, and offline private key recovery to maintain data access during disaster recovery

Cookiecutter is a cross-platform command-line interface tool for project scaffolding and template generation. It functions as a project templating CLI and variable orchestrator that creates standardized software project boilerplates across different operating systems and programming languages. The tool generates project directory structures from predefined templates using variable substitution. It supports the retrieval of template source code from remote Git repositories and utilizes a definition file to prompt users for configuration values to personalize the resulting files and folder stru

VictoriaMetrics is a high-performance, scalable time series database and observability platform designed for long-term storage and analysis of metric, log, and trace data. It functions as a unified backend for monitoring ecosystems, offering full compatibility with industry-standard protocols and query languages. The system is built to handle massive data volumes through a distributed architecture that supports horizontal scaling and efficient data lifecycle management. The platform distinguishes itself through a storage engine that utilizes consistent hashing for data sharding and log-struct

Hatch is a unified tool for managing Python environments, building packages, scaffolding projects, and installing Python versions. It provides a single command-line interface for automating common development workflows, including running scripts, tests, and static analysis with automatic dependency resolution and configuration. The tool manages project settings, dependencies, and build instructions through a declarative TOML configuration file, ensuring reproducibility across environments. It creates and manages isolated virtual environments across all major shells, installs and manages multi