[marcelofukumoto]

Problem:

v1.10 adds the experimental harvester-resource-health-controller add-on, and a Components tab on the Dashboard that shows its checks and lets you ignore them. The docs don't mention either.

Solution:

I added a Resource Health page under Advanced > Available Addons (v1.10 only) and listed the add-on on the Add-ons page. It covers:

• Installing the manifest from the release page and enabling the add-on.
• The Components tab: the alert icon, the rows and their checks, Filter, Expand All and Collapse All.
• The checks the controller reports in v1.10.0, with their ComponentHealth names and severities.
• Ignoring a check from its ⋮ menu (scope, how long, reason), Show ignored, and viewing, editing and deleting a rule, including one that has expired.
• Ignore rules with kubectl, and the rule name the Components tab manages.
• Two screenshots, the Components tab and the Create Ignore Rule dialog, taken on a real cluster.

Related Issue(s):

Issue harvester/harvester#9747
Issue harvester/harvester#8436

Test plan:

1. Open the PR preview and go to Advanced > Available Addons > Resource Health in v1.10 (Dev).
2. Check that the page renders with both images, and that the Add-ons page lists the add-on with a working link.
3. Compare it with a v1.10 cluster that has the controller installed: open the Dashboard's Components tab, then create, edit and delete an ignore rule.

Additional documentation or context

UI change: harvester/harvester-ui-extension#1225

The add-on and its chart aren't merged yet (harvester/harvester#12056, harvester/charts#639). The manifest name follows the <name>-addon.yaml convention of the other standalone add-ons, and the list of checks comes from https://github.com/harvester/resource-health-controller at 039dabc. If the add-on doesn't make v1.10.0, the "Available as of" line needs to change.

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