Discontiguous CIDRs for Dynamic Cluster Scaling
summary
Proposal makes cluster pod and node CIDRs mutable by adding a new ClusterCIDRConfig resource and a dynamic allocator that accepts discontiguous ranges and variable per-node masks. kube-proxy already supports detect-local mode (since v1.18) so routing uses only local pod CIDRs. Example: instead of needing a /19 for 32 nodes, allocator stitches multiple /20s and hands out /24 per node (or /26 for smaller instances), allowing live expansion, IPv4/IPv6 support, and no-restart resizing.
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chapters (11)
- 0:00Start
- 0:10About us
- 0:27Goal
- 1:54Kubernetes Pod IP Allocation
- 3:56Pod IP Allocation Problems
- 6:13Potential Improvements
- 7:43Dependence on Cluster CIDR
- 9:18kube-proxy using ClusterCIOR
- 12:05Kube.proxy and ClusterCIDR
- 13:57NodeIPAM Controller
- 15:32Enhancement proposal
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