Enhancing NodeIPAM to support multiple ClusterCIDRs

[rahulkjoshi]

Enhancement Description

• One-line enhancement description (can be used as a release note): Enhancing NodeIPAM controller to support multiple ClusterCIDRs
• Kubernetes Enhancement Proposal: https://github.com/kubernetes/enhancements/tree/master/keps/sig-network/2593-multiple-cluster-cidrs
• Discussion Link: Many discussions around the future of pod cidrs:
  • Would like ClusterCIDR to be fetchable by pods. kubernetes#46508 (comment)
  • Support multiple cluster-cidrs in kube-controller-manager kubernetes#94862
• Primary contact (assignee): @sarveshr7
• Responsible SIGs: network
• Enhancement target (which target equals to which milestone):
  • Alpha release target (x.y): 1.25
  • Beta release target (x.y):
  • Stable release target (x.y):
• Alpha
  • KEP (k/enhancements) update PR(s):
    • Support Multiple Cluster CIDRs #2594
    • KEP:2593:Update ClusterCIDRConfig API, Test plan and Milestones #3402
  • Code (k/k) update PR(s):
    • Enhance NodeIPAM to support multiple ClusterCIDRs kubernetes#109090
  • Docs (k/website) update PR(s):
• Beta
  • KEP (k/enhancements) update PR(s):
  • Code (k/k) update PR(s):
  • Docs (k/website) update(s):

Please keep this description up to date. This will help the Enhancement Team to track the evolution of the enhancement efficiently.

This KEP has been withdrawn #4253 , there is some remaining work on creating a new repo to host the existing code and removing it from tree

[rahulkjoshi]

/sig network

[dcbw]

[sig-network 2021-06-10] Waiting for SIG Network to decide whether to do this as a built-in or a CRD. Tim wants to see if we can define the type here as a CRD and make the controller built-in first. If we can't figure this out in the next few weeks, we'll just try to make it a built-in.

[wojtek-t]

@rahulkjoshi - to target 1.23, you need PRR approved By Thursday - feel free to assign to me once you open a PR

[salaxander]

/milestone v1.23