rollandf / nvidia-k8s-ipam / 20207532655 / 1
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20207532655.1

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rollandf 
feat: add perNodeExclusions support for IPPool and CIDRPool

Add support for per-node index-based IP exclusions in both IPPool and
CIDRPool resources. This allows administrators to exclude specific IP
address ranges based on their index position within each node's allocated
IP block or prefix, rather than by absolute IP addresses.

API Changes:
- Add ExcludeIndexRange type with startIndex and endIndex fields
- Add perNodeExclusions field to IPPoolSpec and CIDRPoolSpec
- Add kubebuilder validation markers for CRD-level validation
  - startIndex and endIndex must be non-negative
  - endIndex must be >= startIndex
- Add runtime validation functions:
  - validatePerNodeExclusions() for CIDRPool (validates against perNodeNetworkPrefix)
  - validatePerNodeExclusionsForBlockSize() for IPPool (validates against perNodeBlockSize)
- Add comprehensive test coverage (24 test cases total)
  - 14 tests for CIDRPool (IPv4 and IPv6)
  - 10 tests for IPPool (IPv4 and IPv6)

Controller Implementation:
- IPPool controller: Add buildPerNodeExclusions() function
  - Converts index-based exclusions to IP addresses for node's IP block
  - Merges with pool-wide exclusions before passing to allocator
  - 10 unit tests covering all edge cases
- CIDRPool controller: Add buildPerNodeExclusions() function
  - Converts index-based exclusions to IP addresses for node's prefix
  - Combines with filtered pool-wide exclusions
  - 7 unit tests covering all edge cases

Implementation details:
- Each node processes only its own allocation (per-node)
- Index-based ranges are converted to IP-based ExclusionRange objects
- Ranges are clamped to node's allocation boundaries
- Ranges outside node's allocation are skipped
- Reuses existing allocator exclusion mechanism (no allocator changes)
- Memory efficient: large ranges create single ExclusionRange entries

Documentation:
- Update README.md with perNodeExclusions field descriptions
- Update docs/static-ip.md with examples
- Add detailed fi... (continued)

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Source Files on job 20207532655.1