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Add NPEP for new CIDRGroup object peer #183

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@tssurya tssurya commented Dec 7, 2023

This NPEP captures the use cases for having a better CIDRGrouper for easier management of CIDR peers in addition to inline CIDR peers
Closes #182

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[APPROVALNOTIFIER] This PR is NOT APPROVED

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@k8s-ci-robot k8s-ci-robot added the size/M Denotes a PR that changes 30-99 lines, ignoring generated files. label Dec 7, 2023
@tssurya tssurya force-pushed the cidr-object-npep branch from aef81b5 to 7e30032 Compare March 3, 2024 15:55
@k8s-ci-robot k8s-ci-robot added size/L Denotes a PR that changes 100-499 lines, ignoring generated files. and removed size/M Denotes a PR that changes 30-99 lines, ignoring generated files. labels Mar 3, 2024
@tssurya tssurya changed the title [WIP] Add NPEP for new CIDR object peer Add NPEP for new CIDRGroup object peer Mar 3, 2024
@k8s-ci-robot k8s-ci-robot removed the do-not-merge/work-in-progress Indicates that a PR should not merge because it is a work in progress. label Mar 3, 2024
@tssurya tssurya force-pushed the cidr-object-npep branch from 7e30032 to 930064a Compare March 3, 2024 15:57
Signed-off-by: Surya Seetharaman <[email protected]>
@tssurya tssurya force-pushed the cidr-object-npep branch from 930064a to b6673d7 Compare March 3, 2024 16:06
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tssurya commented Mar 3, 2024

@joestringer and @networkop PTAL, I have tried to include the uses cases you had proposed to see if we can also have this way of expressing CIDR peers.

The speed of IP churn is bounded by the BGP advertisement interval and can be
further reduced by the BGP controller implementation.

* As a cluster administrator I want to to ensure that pods can reach
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@rahulkjoshi rahulkjoshi Mar 4, 2024

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Just playing devil's advocate with maybe a really bad idea:

What if we try to use the EndpointSlice API to solve this set of problems?

Pros:

  • Fewer network policy objects CRDS
  • Make headway into defining the Service selector API

Cons:

  • Abusing(?) the EndpointSlice idiom

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@rahulkjoshi can you specify IP prefixes or only IP addresses in EndpointSlice?

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😦 yeah you're right only individual addresses in EndpointSlice

My underlying thought with this situation was whether there's overlap with a more general service discovery problem. My thinking was that whatever application the rule protects also needs to discover the IPs it's talking to.

I was hoping that plugging into that system might be more ergonomic? But it's more likely to just be incredibly complicated and not easily generalizable.

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astoycos commented Jun 4, 2024

/remove-lifecycle stale

@k8s-ci-robot k8s-ci-robot removed the lifecycle/stale Denotes an issue or PR has remained open with no activity and has become stale. label Jun 4, 2024
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@k8s-triage-robot: Closed this PR.

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tssurya commented Nov 2, 2024

/reopen

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@tssurya: Reopened this PR.

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tssurya commented Nov 2, 2024

/remove-lifecycle rotten

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[ENHANCEMENT] Use Cases for wanting Egress CIDR Peers as an external object
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