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Add known issue for WSL2 and cgroupv2 support #3689

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merged 2 commits into from
Aug 13, 2024

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This adds a note to the Known Issues document with details related to proper setup requirements for cgroupv2 support and links to the known issues page for extra visibility from the Using WSL2 page.

Includes a separate commit that cleans up some of the stale information from the known issues page and minor formatting issues found while performing updates.

Closes: #3685

This removes outdated information from the known issues page for
releases that are well past end of life. It also cleans up some
formatting and fixes a few markdown linting concerns.

Signed-off-by: Sean McGinnis <sean.mcginnis@gmail.com>
@k8s-ci-robot k8s-ci-robot added cncf-cla: yes Indicates the PR's author has signed the CNCF CLA. size/L Denotes a PR that changes 100-499 lines, ignoring generated files. labels Jul 18, 2024
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@neolit123 neolit123 left a comment

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/lgtm
/kind documentation

@k8s-ci-robot k8s-ci-robot added the kind/documentation Categorizes issue or PR as related to documentation. label Jul 19, 2024
@k8s-ci-robot k8s-ci-robot added the lgtm "Looks good to me", indicates that a PR is ready to be merged. label Jul 19, 2024
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@BenTheElder BenTheElder left a comment

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thanks for working on this, did a first pass

cc @aojea

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## Older Linux Distributions

KIND uses a cgroup setting of `cgroupns=private`. The cgroup namespace functionality was added in 2016, so some of the
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(which is on by default in cgroups v2 on all major container runtimes)

This adds a note to the Known Issues document with details related to
proper setup requirements for cgroupv2 support and links to the known
issues page for extra visibility from the Using WSL2 page.

Signed-off-by: Sean McGinnis <sean.mcginnis@gmail.com>
@k8s-ci-robot k8s-ci-robot removed the lgtm "Looks good to me", indicates that a PR is ready to be merged. label Jul 22, 2024
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/lgtm
/approve
thanks and sorry for the delay

Dec 07 00:37:53 kind-1-control-plane kubelet[688]: I1207 00:37:53.229561 688 eviction_manager.go:340] eviction manager: must evict pod(s) to reclaim ephemeral-storage
Dec 07 00:37:53 kind-1-control-plane kubelet[688]: E1207 00:37:53.229638 688 eviction_manager.go:351] eviction manager: eviction thresholds have been met, but no pods are active to evict
```
## Failure to Create Cluster with Cgroups v2
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I guess we can refer back to this in git / ask people to please upgrade. It's surprising how often we still get issues from really old releases of both kind and Kubernetes

@k8s-ci-robot k8s-ci-robot added the lgtm "Looks good to me", indicates that a PR is ready to be merged. label Aug 12, 2024
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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: BenTheElder, stmcginnis

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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 Aug 12, 2024
@k8s-ci-robot k8s-ci-robot merged commit 6692e5d into kubernetes-sigs:main Aug 13, 2024
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@stmcginnis stmcginnis deleted the wsl2 branch August 13, 2024 11:45
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WSL environment needs additional cgroupv2 configuration
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