kubernetes-sigs/aws-load-balancer-controller
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Aws Load Balancer Controller
The AWS Load Balancer Controller is a Kubernetes controller that automates the provisioning and lifecycle management of cloud-native load balancing resources. It functions as an infrastructure orchestrator, translating declarative cluster configurations into specific requests for external cloud services to route traffic into containerized workloads. By implementing standard ingress and gateway specifications, the system ensures that cluster networking adheres to official industry standards for HTTP, HTTPS, and transport-layer traffic.
The controller distinguishes itself through its deep integration with cloud-native infrastructure, enabling advanced traffic management capabilities such as global traffic routing and direct target group binding. It supports complex routing rules and listener configurations through the Gateway API, while simultaneously managing the automated provisioning and renewal of TLS certificates for secure endpoints. The system maintains a persistent mapping between cluster objects and cloud resources, ensuring consistent configuration across the entire lifecycle of the infrastructure.
Beyond core routing, the controller provides comprehensive operational visibility through the export of internal system metrics and the inclusion of automated conformance testing suites. It is designed for high-availability environments, utilizing leader election and anti-affinity scheduling to ensure fault-tolerant operation. The controller also allows for strict workload isolation by restricting its execution to specific node groups within the cluster.
Features
- Ingress Controllers - Implements standard ingress and gateway API specifications to handle HTTP, HTTPS, and transport layer traffic routing.
- Application Layer Load Balancing - Provisions application load balancers to handle HTTP and HTTPS ingress traffic based on defined routing rules.
- Cluster State Reconciliation - Continuously reconciles the desired state of cluster resources with the actual state of cloud infrastructure.
- Elastic Load Balancers - Automates the provisioning and lifecycle management of cloud-native load balancers for Kubernetes services and ingress resources.
- Ingress Load Balancers - Configures cloud-native load balancers to route external HTTP and HTTPS traffic to cluster services.
- Gateway API Integrations - Validates Gateway API compliance to ensure adherence to official industry standards for traffic routing.
- Load Balancer Lifecycles - Automates the lifecycle management of network load balancers for high-performance transport layer traffic routing.
- TLS Certificate Management - Automates the request, renewal, and application of TLS certificates for secure encrypted traffic endpoints.
- Cloud Infrastructure Orchestration - Orchestrates the lifecycle of cloud-native load balancing resources for containerized workloads.
- Custom Resource Definitions - Extends the native cluster API to allow declarative definition of complex load balancing requirements.
- High Availability Systems - Ensures continuous operation and fault tolerance through leader election and anti-affinity scheduling.
- Leader Election - Coordinates multiple controller instances through a shared lock to ensure fault-tolerant operation.
- Infrastructure as Code Engines - Maintains persistent mapping between cluster objects and cloud-native resources to ensure consistent configuration.
- Cloud Provider Integrations - Translates declarative cluster configurations into specific requests for external cloud infrastructure services.
- Conformance Test Suites - Provides automated test suites to validate API compliance and troubleshoot load balancer functionality.
- Target Group Bindings - Enables direct binding of external load balancer target groups to cluster services, bypassing standard ingress resource configuration.
- Reconciliation Queues - Uses prioritized queues to process resource changes asynchronously and minimize latency during state synchronization.
- Kubernetes Gateway API Standard - Manages advanced traffic routing rules and gateway resources in adherence to industry standards.
- Load Balancers - Provisions and maintains high-performance transport layer load balancers for non-HTTP workloads.
- Global Traffic Steering - Manages global accelerator endpoints to route traffic across multiple geographic regions for improved availability.
- Metrics Exporters - Exports internal system metrics to external monitoring platforms for infrastructure health and performance visibility.
