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Add NPEP for new CIDRGroup object peer #183

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Add NPEP for new CIDRGroup object peer #183

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@tssurya tssurya commented Dec 7, 2023 •
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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 mentioned this pull request Dec 31, 2023
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@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
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Add NPEP for new CIDR object peer
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Signed-off-by: Surya Seetharaman <[email protected]>
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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.

rahulkjoshi
rahulkjoshi reviewed Mar 4, 2024
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npeps/npep-182-cidr-object-peer.md
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.

@astoycos astoycos mentioned this pull request Mar 5, 2024
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astoycos commented Jun 4, 2024

/remove-lifecycle stale

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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 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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