kubernetes-sigs/cluster-api

Features

• Cross-Infrastructure Provisioning - Automates the creation and lifecycle management of clusters across diverse public and private infrastructures.
• Kubernetes Cluster Management - Provides a comprehensive framework for provisioning, configuring, and maintaining the full lifecycle of Kubernetes clusters.
• Provider Frameworks - Provides the standardized resource definitions and controllers used to build infrastructure, bootstrap, and control plane providers.
• Managed Cluster Orchestration - Employs a dedicated management cluster to orchestrate the full lifecycle of separate and remote workload clusters.
• Multi-Cluster Operational Management - Provides centralized orchestration of the lifecycle, upgrades, and monitoring across a fleet of multiple Kubernetes clusters.
• Infrastructure API Definitions - Implements a framework for defining custom infrastructure APIs that model desired and observed states of cloud resources.
• Cluster Bootstrapping - Performs the initial setup and configuration of a management cluster to enable it to act as a controller.
• Provider Contract Standardization - Defines the standard resource contracts and interfaces that bootstrap providers must implement for consistent node preparation.
• Machine Fleet Scaling - Orchestrates groups of identical virtual machines to maintain desired counts and handle infrastructure failures.
• Node Configuration Initialization - Uses distribution-specific tools to prepare a node's filesystem and settings before it joins a cluster.
• Cluster Upgrades - Provides tools and processes for managing version updates across distributed cluster infrastructure.
• Control Plane Deployments - Deploys and operates the cluster control plane using hosted or self-managed implementation patterns.
• Controller Runtime Frameworks - Implements reconciliation loops using a standardized framework to manage concurrency and API rate limits.
• Declarative Infrastructure Reconciliation - Continuously monitors and enforces the desired infrastructure state by matching it against observed physical resources.
• Control Plane Provider Standards - Enforces operational consistency through rules and specifications for implementing control plane resource management.
• Declarative - Automates creation, scaling, and destruction of clusters through a declarative API.
• Infrastructure Component Lifecycle Management - Provides repeatable orchestration for the deployment, update, and removal of infrastructure components across multiple clusters.
• Infrastructure Lifecycle Management - Automates the full lifecycle, including provisioning and maintenance, of provider-specific machine instances.
• Infrastructure Provider Development - Provides a framework and tools for building and testing custom infrastructure and bootstrap providers.
• Infrastructure Provider Implementations - Implements the concrete logic required to provision and manage clusters on specific cloud or bare-metal platforms.
• Infrastructure State Synchronization - Continuously aligns the state of the management plane with the actual state of remote infrastructure resources.
• Infrastructure Templates - Provides reusable infrastructure specifications via templates to standardize the creation of workload clusters.
• Infrastructure Topology Coordination - Coordinates the creation and deletion of infrastructure resources to maintain the desired cluster layout.
• Control Plane Deployments - Deploys the API server, controller manager, scheduler, and etcd to establish a functional control plane.
• Multi-Cluster Infrastructure Provisioning - Enables provisioning of underlying infrastructure for multiple Kubernetes clusters from a single management plane.
• Kubernetes Cluster Provisioners - Automates the creation, configuration, and deletion of managed Kubernetes clusters and their associated cloud infrastructure.
• Kubernetes Cluster Provisioning - Automates the deployment and lifecycle management of production-grade Kubernetes clusters through declarative manifest generation.
• Kubernetes Node Provisioning - Coordinates the configuration and deployment of host nodes to ensure they successfully join a Kubernetes cluster.
• Machine Fleet Orchestration - Orchestrates large groups of identical virtual machines, managing their full lifecycle and scaling requirements.
• Multi-Cluster Management Systems - Provides a centralized platform for operating the full lifecycle of multiple workload clusters from one management cluster.
• Lifecycle Operation Standards - Defines common operational patterns for cluster management while supporting interchangeable infrastructure implementations.
• Provider Plugin Architectures - Decouples core orchestration logic from cloud-specific implementations using a standardized provider-based plugin architecture.
• Cluster Resource Abstractions - Models infrastructure and control planes as Kubernetes custom resources to standardize the cluster lifecycle management process.
• Certificate Lifecycles - Automates the generation and rotation of CA and component certificates to secure the cluster.
• Infrastructure Provider Interfaces - Enforces standardized interfaces and behavioral rules for interacting with diverse cloud and hypervisor provider APIs.
• Infrastructure Bootstrapping Templates - Provides reusable blueprints for generating the initial hardware and network configurations required for cluster provisioning.
• Resource Manifest Templating - Produces cluster manifests by substituting variables into predefined YAML templates for consistent deployments.
• Provider Implementation Swapping - Uses operational interfaces to allow the exchange of underlying infrastructure providers without modifying the management API.
• API Resource Validation - Validates declarative resource specifications against structural and business rules during object creation or updates.
• Machine Pool Coordination - Orchestrates groups of identical machines, including automated scaling and health maintenance.
• Component Source Configuration - Defines custom sources for infrastructure, core, and bootstrap components used during initialization.
• Provider Lifecycle Managers - Implements tools for installing, initializing, and removing infrastructure provider plugins within the management cluster.
• IPAM Provider Standardization - Establishes the resource contracts used by IP address management providers to coordinate network addressing for cluster nodes.
• Addons Management - Deploys additional software and extensions to clusters using package managers or declarative tools.
• Declarative Cluster Configuration Generation - Generates declarative YAML configuration files that define the hosts and roles required to provision a cluster.
• Node Bootstrap Data Generation - Generates the specific configuration secrets and data necessary to initialize individual nodes during the bootstrap process.
• Node Pool Coordination - Links sets of nodes to specific infrastructure and bootstrap configurations to coordinate their lifecycle.
• Provider-Node Association - Maps physical infrastructure instances to Kubernetes nodes using provider-specific identifiers.
• Kubernetes Cluster Autoscalers - Syncs node pool status with external scaling mechanisms to prevent reconciliation conflicts.
• Cluster Configuration Templates - Uses templates to generate specific hardware and network settings, allowing cluster-specific overrides of default configurations.
• Control Plane Version Management - Specifies the desired semantic version of the control plane and tracks the current minimum.
• Custom Provider Extensions - Provides extensibility points to integrate new cloud platforms, bootstrapping tools, and control plane implementations.
• Infrastructure Machine Rollouts - Replaces existing machines with new ones immediately using a defined rollout strategy.
• Virtual Control Plane Node Scaling - Scales the number of control plane instances and reports the count of ready replicas.
• Node Decommissioning - Drains nodes and detaches volumes before cleaning up the associated infrastructure and bootstrap objects.
• In-Place Node Updates - Enables applying software updates directly to running nodes to reduce the overhead of full machine replacement.
• Infrastructure as Code Tools - Manages machine fleets and cluster topologies using declarative Kubernetes custom resources as code.
• Provider Deletions - Safely removes infrastructure provider components while preserving namespaces and custom resource definitions to prevent data loss.
• Network Prerequisite Provisioning - Sets up foundational networking components, including load balancers and firewall rules, required for cluster operation.
• Provisioning State Tracking - Monitors and reports the readiness of underlying infrastructure to synchronize subsequent deployment stages.
• Cluster Access Control - Maintains secured configuration secrets to control administrative access to the managed workload clusters.
• Cluster Migration - Moves infrastructure resources and their dependencies from one management cluster to another.
• Cluster Resource Management - Provides administrative control over the deployment and updating of cluster resources to ensure stable transitions.
• Resource Ownership Resolution - Identifies parent cluster objects associated with specific resources to coordinate automated lifecycle management and garbage collection.
• Control Plane Node Provisioning - Defines the infrastructure and configuration required to provision nodes that host the cluster control plane.
• Cluster State Synchronization - Synchronizes the operational status and provider IDs of machines by monitoring infrastructure and bootstrap resources.
• Reconciliation Suspension - Suspends the automated infrastructure reconciliation loop to prevent changes during maintenance or troubleshooting.
• Resource Ownership References - Links high-level cluster objects to low-level machine resources via owner references for coordinated deletion.
• Machine Group Maintenance - Provisions groups of identical machines and ensures a constant count of healthy instances is maintained.
• Component Version Upgrades - Identifies available version updates and compatible releases for specific software components to maintain synchronization.
• API Endpoint Exposure - Surfaces the network hostname and port used to communicate with the cluster management server.
• IP Address Management Systems - Allocates and tracks IP addresses for machines by managing dedicated address pools.
• Unhealthy Node Remediation - Monitors nodes for health failures and automatically triggers the replacement or repair of affected machines.
• Cluster Credential Exports - Extracts the necessary kubeconfig files to authenticate and communicate with provisioned workload clusters.
• Infrastructure Credential Isolation - Manages distinct infrastructure credentials for different tenants to ensure strict resource isolation.
• Availability Zone Identification - Identifies failure domains and attributes to determine high-availability placement of cluster machines.
• Fault-Tolerant Machine Placement - Places control plane instances across designated failure domains to ensure system fault tolerance and resilience.
• Rollout Scheduling - Schedules the exact future time at which a version upgrade or rolling update should be triggered.
• Cluster Health Monitoring - Provides a summarized view of cluster health and machine states to identify and remediate failures.
• Cluster Resource Inspections - Offers detailed inspection of the provisioning phase, version, and resource health for managed clusters.
• End-to-End Testing - Executes automated suites that simulate complete user workflows to verify system-wide functional correctness.
• Provider Implementation Tests - Validates the correctness and quality of infrastructure and bootstrap provider implementations using a dedicated framework.
• Portable Infrastructure Test Suites - Runs a single test suite across multiple providers by abstracting resource templates and timeouts.
• API Version Migration Mappings - Handles breaking changes and required updates by mapping resource transformations between different API versions.
• Cluster Provisioning - Declaratively manages cluster lifecycles across various providers.

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