feat: Implement Dynamic IPAM for Slice Overlay Network (#252) #263
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This commit implements a comprehensive Dynamic IPAM system to replace the static and inefficient IP address management in KubeSlice. Key Features: - Dynamic IPAM Pool CRD (IPAMPool) for on-demand subnet allocation - IPAMService with allocation/deallocation logic and automatic reclamation - IPAMPoolReconciler for Kubernetes lifecycle management - Backward compatibility with existing static IPAM configurations - Multiple allocation strategies (Sequential, Random, Efficient) - Configurable auto-reclamation with delays - Prometheus metrics for monitoring IPAM pool status - Kubernetes events for operational visibility New Files: - apis/controller/v1alpha1/ipam_types.go: IPAMPool CRD definition - service/ipam_service.go: Core IPAM business logic - service/ipam_service_test.go: Comprehensive unit tests - controllers/controller/ipam_controller.go: IPAM pool controller - config/crd/bases/controller.kubeslice.io_ipampools.yaml: Generated CRD manifest - config/samples/controller_v1alpha1_ipampool.yaml: Sample IPAM pool configuration - config/samples/controller_v1alpha1_sliceconfig_dynamic_ipam.yaml: Sample dynamic IPAM slice - docs/dynamic_ipam.md: Comprehensive documentation Modified Files: - service/bootstrap.go: Integrated IPAM service - service/slice_config_service.go: Added IPAM service integration - metrics/constants.go: Added IPAM metrics constants - events/events_generated.go: Added IPAM event definitions - config/events/controller.yaml: Added IPAM events configuration - config/rbac/role.yaml: Added IPAM RBAC permissions - apis/controller/v1alpha1/zz_generated.deepcopy.go: Generated Kubernetes code Resolves: kubeslice#252 Implements: Dynamic IPAM system for efficient IP space utilization
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This PR implements a Dynamic IPAM system to replace the static and inefficient IP address management in KubeSlice. The existing system divides a predefined CIDR block into fixed subnets regardless of actual cluster participation, leading to significant IP space wastage.
Resolves: #252
Key Features
Implementation
New Files
apis/controller/v1alpha1/ipam_types.go- IPAMPool CRD definitionservice/ipam_service.go- Core IPAM business logicservice/ipam_service_test.go- Comprehensive unit testscontrollers/controller/ipam_controller.go- IPAM pool controllerconfig/crd/bases/controller.kubeslice.io_ipampools.yaml- Generated CRD manifestconfig/samples/controller_v1alpha1_ipampool.yaml- Sample IPAM pool configurationconfig/samples/controller_v1alpha1_sliceconfig_dynamic_ipam.yaml- Sample dynamic IPAM slicedocs/dynamic_ipam.md- Comprehensive documentationModified Files
service/bootstrap.go- Integrated IPAM serviceservice/slice_config_service.go- Added IPAM service integrationmetrics/constants.go- Added IPAM metrics constantsevents/events_generated.go- Added IPAM event definitionsconfig/events/controller.yaml- Added IPAM events configurationconfig/rbac/role.yaml- Added IPAM RBAC permissionsapis/controller/v1alpha1/zz_generated.deepcopy.go- Generated Kubernetes codeHow Has This Been Tested?
Test Cases Covered
Architecture
SliceConfig → IPAMService → IPAMPool CRD
↓
IPAMPoolReconciler (K8s Controller)