Add node monitor flags

[so0k]

To improve quicker detection of a node being down, allow users to set

• kubelet's node-status-update-frequency flag
• controller manager node-monitor-* and pod-eviction-timeout flags

Ref Improving Kubernetes reliability: quicker detection of a node down

[so0k]

/assign @geojaz

I'm not sure what else I need to do for this change?

[chrislovecnm]

Take a look at https://github.com/kubernetes/kops/blob/master/docs/development/api_updates.md

You need to update the two other files and generate the code with apimachinery

[so0k]

should I create a separate PR for adding terminated pods garbage collection flags for controller manager - see: evicted pods issue

EDIT: just noticed it's already there - sorry

[so0k]

@chrislovecnm let me know if I missed anything out

[chrislovecnm]

/ok-to-test

[chrislovecnm]

This looks good, I am checking to see if we are still merging code since we are close to the 1.9 release

[so0k]

maybe I should add docs on how to apply what's in the article (or I can do this in a separate PR?)

[justinsb]

/lgtm

No user-facing impact => ok to merge :-)

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: justinsb, so0k

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [justinsb]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment