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Implement egress traffic CIDRGroup object #205

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@tssurya tssurya commented Mar 3, 2024

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This resulted from discussions in network-policy-api
meetings and after consulting apiserver team for best
practices.
So far ingress and egress peer expressions were symmetric.
However moving forward, since we are adding support for
egress (northbound) peers and fqdn which might have
differences compared to what we want to allow for ingress,
we have decided to split the peers into ingress and egress.

Signed-off-by: Surya Seetharaman <[email protected]>
Some FTR things:

1) As an egress peer a user can selector either namespaces, or pods or nodes.
In a given rule more than 1 type of selection is not allowed.
2) An empty node selector means it selects all nodes in the cluster.
3) nodes can be referred only from egress rule peers, since we only
support northbound use cases.

Signed-off-by: Surya Seetharaman <[email protected]>
Some FTR things:

    1) As an egress peer a user can selector either namespaces, or pods or
       nodes or externalNetworks.
    In a given rule more than 1 type of selection is not allowed.
    2) An empty externalNetworks selector means it selects all externalNetworkSets in the cluster.
    3) externalNetworks can be set only from to.Peer

Signed-off-by: Surya Seetharaman <[email protected]>
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Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

@k8s-ci-robot k8s-ci-robot added 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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[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: tssurya
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@k8s-ci-robot k8s-ci-robot added cncf-cla: yes Indicates the PR's author has signed the CNCF CLA. needs-rebase Indicates a PR cannot be merged because it has merge conflicts with HEAD. labels Mar 3, 2024
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PR needs rebase.

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@k8s-ci-robot k8s-ci-robot added the size/XXL Denotes a PR that changes 1000+ lines, ignoring generated files. label Mar 3, 2024
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@tssurya tssurya changed the title Implement egress traffic ExternalNetworks object Implement egress traffic CIDRGroup object Mar 4, 2024
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@k8s-ci-robot k8s-ci-robot added the lifecycle/stale Denotes an issue or PR has remained open with no activity and has become stale. label Jun 2, 2024
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