fix(firewall): open node to master ICMP security group

[maximumG]

Fixes #15329.

Cilium health check mechanism requires ICMP and TCP/4240 port to be opened between every nodes in the cluster, including control plane nodes. If one of these 2 checks fails the node is considered as unreachable.

We only open ICMP echo request (type 8) from node to master.

[linux-foundation-easycla[bot]]

The committers listed above are authorized under a signed CLA.

• :white_check_mark: login: maximumG / name: Maxime Gerges (7f5b0ddf2a13b771e94a2157409efeee8ac9c590)

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[olemarkus]

Thanks. I think I am somewhat convinced it is practical to allow this traffic.

/ok-to-test

[olemarkus]

You probably need to run ./hack/update-expected.sh to fix the tests.

[olemarkus]

/retest

[maximumG]

@olemarkus is there any way I can help to finalize this PR ?

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[johngmyers]

Please test your change works on an IPv6 cluster.

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@maximumG: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
pull-kops-e2e-k8s-aws-calico	b35b7a9f287592a28e08964adfb71849e021a4e4	link	true	/test pull-kops-e2e-k8s-aws-calico
pull-kops-kubernetes-e2e-ubuntu-gce-build	b35b7a9f287592a28e08964adfb71849e021a4e4	link	true	/test pull-kops-kubernetes-e2e-ubuntu-gce-build

Full PR test history. Your PR dashboard. Please help us cut down on flakes by linking to an open issue when you hit one in your PR.

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[bkmzio]

@maximumG, may I inquire if there's a chance to consolidate or merge the changes? Your input would be greatly appreciated!

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/lifecycle stale

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/lifecycle rotten

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/close

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@k8s-triage-robot: Closed this PR.

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/close

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