Improve "Reserve Compute Resources for System Daemons" doc

[sathieu]

• 📖 Add a link to how to change kubelet settings
• 🗑️ Remove mention of k8s 1.17
• 🧹 Remove deprecated CLI flags and replace by KubeletConfiguration settings ; and properly document defaults
• 👍 properly document enforcement (enforceNodeAllocatable should be set)

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[sathieu]

Appart from the included changes, I find the Kube Reserved and System Reserved section misleading.

I first thought that those would map to an amount of reserved memory and cpu (i.e. requests), while the current behavior is to set limits.

[sathieu]

Thanks @tengqm. I've applied your suggestions.

[tengqm]

/label tide/merge-method-squash

[sathieu]

@tengqm How can we move this PR forward?

[tengqm]

@sathieu Please check the feedback about headings and fix it if possible.

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: tengqm

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[sathieu]

@tengqm @dipesh-rawat Sorry for the delay. I addressed the last comment. Back to you!

[tengqm]

/lgtm

[k8s-ci-robot]

LGTM label has been added.

Git tree hash: b69933bc8f72ae5b7e2b104da4ba1671e5c18392