[o11y alerting serverless] Incomplete breadcrumbs

[emma-raffenne]

Environment

• Kibana Observability serverless 8.10 main branch yarn start --serverless=oblt
• Elasticsearch stateful 8.9.0
• Deployment: local MacOS 12.6.7

Describe the bug

Breadcrumbs show "Home > Alerts" despite being on rules or rule detail pages.

Steps to reproduce

1. Start/Deploy Kibana Observability in serverless mode
2. Go to "Alerts"
3. Go to "Manage Rules"

Expected behaviour

Breadcrumbs to show the path corresponding to the current page

Screenshots

[elasticmachine]

Pinging @elastic/actionable-observability (Team: Actionable Observability)

[cnasikas]

I also noticed that the Cases breadcrumbs do not work correctly in the O11y Serverless project. In Cases, we use serverless.setBreadcrumbs to append custom deeper context (the title of the case for example when viewing a case). As the main parts of the breadcrumbs's path are automatically calculated from the side nav + current URL I suspect that the NavigationTree is not set correctly. In the Security project, this does not occur. I tried to add

{
   "link":"observability-overview:cases",
   "children":[
      {
         "link":"observability-overview:cases_configure"
      },
      {
         "link":"observability-overview:cases_create"
      }
   ]
}

in the navigationTree defined here x-pack/plugins/serverless_observability/public/components/side_navigation/index.tsx without success. The pages that are affected are the create case and the configure case.

[simianhacker]

Documentation for serverless breadcrumbs

[elasticmachine]

Pinging @elastic/appex-sharedux (Team:SharedUX)

[semd]

The issue is caused by the navLinkStatus: hidden of the deepLink configuration. This is usually used when we want to hide links from the side navigation menu, but it is also used for unauthorized (license, capabilities...) links sometimes.

The shared-ux navigation component, to prevent showing broken links, filters all hidden links out of the chrome navigationTree registered, so the breadcrumbs for these pages are not configured either.

It would be great to have a clearer specification of what a hidden link means, because we are using it for two different purposes, if solutions do not set the navLinkStatus: hidden in these (authorized) links there's no other way to prevent them from showing in the side navigation menu.

[Dosant]

This is still relevant. I think the best approach would be to add the alerts sub-pages to the navigation tree for the breadcrumbs (but keep them hidden in the side nav). But this isn't possible now, it should be after #166883 is done.
We will still need to call serveless.setBreadcrumbs manually to append deeper context which is dynamic (like rule name)

[cnasikas]

I tested and for Cases this is still relevant.

[semd]

#167774 Will introduce a way to hide links from the side nav (sideNavStatus: 'hidden') without removing them from the serverless navigationTree, so the breadcrumbs will be generated automatically.

However, solution will have to set navLinkStatus: "visible' to those links in the plugin deepLinks registry, having navLinkStatus: "hidden' (or undefined) there will still filter the link out from the final serverless navigationTree.