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🐛 capd: fix ignition to also set the kube-proxy configuration to skip setting sysctls #9894

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merged 1 commit into from
Dec 18, 2023
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🐛 capd: fix ignition to also set the kube-proxy configuration to skip setting sysctls #9894

merged 1 commit into from
Dec 18, 2023

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chrischdi
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What this PR does / why we need it:

While developing for k8s v1.29 support (#9872 and #9890) ignition tests started to fail because kube-proxy was not able to start due to the following error:

❯ k logs -n kube-system kube-proxy-brfk2
I1218 12:12:16.663929       1 server_others.go:72] "Using iptables proxy"
I1218 12:12:16.670800       1 server.go:1050] "Successfully retrieved node IP(s)" IPs=["172.18.0.5"]
I1218 12:12:16.671585       1 conntrack.go:118] "Set sysctl" entry="net/netfilter/nf_conntrack_max" value=196608
E1218 12:12:16.671607       1 server.go:556] "Error running ProxyServer" err="open /proc/sys/net/netfilter/nf_conntrack_max: permission denied"
E1218 12:12:16.671633       1 run.go:74] "command failed" err="open /proc/sys/net/netfilter/nf_conntrack_max: permission denied"

It turns out that we are adding custom kube-proxy configuration when using cloud-init in capd already for a long time. This did not happen for ignition.
With k8s v1.29, kube-proxy seems to have changed its behaviour so it wanted to set the sysctls when maxPerCore was set to nil.

This fixes the issue by adding the configuration similar to what we do for cloud-init in CAPD.

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #

/area provider/infrastructure-docker

@k8s-ci-robot k8s-ci-robot added the area/provider/infrastructure-docker Issues or PRs related to the docker infrastructure provider label Dec 18, 2023
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/test help

@k8s-ci-robot k8s-ci-robot added the cncf-cla: yes Indicates the PR's author has signed the CNCF CLA. label Dec 18, 2023
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@chrischdi: The specified target(s) for /test were not found.
The following commands are available to trigger required jobs:

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  • /test pull-cluster-api-e2e-main
  • /test pull-cluster-api-e2e-mink8s-main
  • /test pull-cluster-api-e2e-workload-upgrade-1-28-latest-main
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@k8s-ci-robot k8s-ci-robot added the size/S Denotes a PR that changes 10-29 lines, ignoring generated files. label Dec 18, 2023
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/cherry-pick release-1.6

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@chrischdi: once the present PR merges, I will cherry-pick it on top of release-1.6 in a new PR and assign it to you.

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/cherry-pick release-1.6

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/test help

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@chrischdi: The specified target(s) for /test were not found.
The following commands are available to trigger required jobs:

  • /test pull-cluster-api-build-main
  • /test pull-cluster-api-e2e-full-dualstack-and-ipv6-main
  • /test pull-cluster-api-e2e-full-main
  • /test pull-cluster-api-e2e-main
  • /test pull-cluster-api-e2e-mink8s-main
  • /test pull-cluster-api-e2e-workload-upgrade-1-28-latest-main
  • /test pull-cluster-api-test-main
  • /test pull-cluster-api-test-mink8s-main
  • /test pull-cluster-api-verify-main

The following commands are available to trigger optional jobs:

  • /test pull-cluster-api-apidiff-main
  • /test pull-cluster-api-e2e-scale-main-experimental

Use /test all to run the following jobs that were automatically triggered:

  • pull-cluster-api-apidiff-main
  • pull-cluster-api-build-main
  • pull-cluster-api-e2e-main
  • pull-cluster-api-test-main
  • pull-cluster-api-verify-main

In response to this:

/test help

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

@chrischdi chrischdi changed the title capd: fix ignition to also set the kube-proxy configuration to skip setting sysctls 🐛 capd: fix ignition to also set the kube-proxy configuration to skip setting sysctls Dec 18, 2023
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/test pull-cluster-api-e2e-full-main

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/assign sbueringer

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/test pull-cluster-api-e2e-full-main

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/lgtm
/approve

Thank you very much!! Very nice troubleshooting!

/hold
feel free to merge

@k8s-ci-robot k8s-ci-robot added do-not-merge/hold Indicates that a PR should not merge because someone has issued a /hold command. lgtm "Looks good to me", indicates that a PR is ready to be merged. labels Dec 18, 2023
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LGTM label has been added.

Git tree hash: f1e7708ef8e2b06327ae8e7e8b179aee02c61488

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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: sbueringer

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@k8s-ci-robot k8s-ci-robot added the approved Indicates a PR has been approved by an approver from all required OWNERS files. label Dec 18, 2023
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Tested locally, looks good to merge after successful e2e.

/hold cancel

@k8s-ci-robot k8s-ci-robot removed the do-not-merge/hold Indicates that a PR should not merge because someone has issued a /hold command. label Dec 18, 2023
@k8s-ci-robot k8s-ci-robot merged commit ec45bdb into kubernetes-sigs:main Dec 18, 2023
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@k8s-ci-robot k8s-ci-robot added this to the v1.7 milestone Dec 18, 2023
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@chrischdi: new pull request created: #9895

In response to this:

/cherry-pick release-1.6

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@k8s-infra-cherrypick-robot k8s-infra-cherrypick-robot mentioned this pull request Dec 18, 2023
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@elmiko elmiko Awaiting requested review from elmiko

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