feat(slo): health status

[kdelemme]

Resolves #176088

🍒 Summary

This PR implements a new internal routes for fetching the health and state of a list of slo id. The state can be one of the following options: no_data, indexing, running or stale.
While the health is directly correlated to the related transforms' health.

The state decision tree is as follow:

• When summaryUpdatedAt > 48hours: state = "stale"
• When summaryUpdatedAt - latestSliTimestamp >= 10 minutes: state = "indexing"
• When summaryUpdatedAt - latestSliTimestamp < 10 minutes: state = "running"
• state = "no_data" if temporary summary document

We display a warning on the SLO details page when one of the transform is unhealthy, asking the user to go investigate:

Page	Screenshot
SLO Details
SLO List Group View
SLO List Ungroup View

[apmmachine]

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[elasticmachine]

Pinging @elastic/obs-ux-management-team (Team:obs-ux-management)

[kdelemme]

/ci

[shahzad31]

would it be possible to pre-filter the transform list ? possibly not , though, i guess we can contribute to the transform list page so that it filters using query params.

[kdelemme]

it's not supported at the moment :(

[kdelemme]

/ci

[mgiota]

@kdelemme We were discussing with @lucabelluccini about enhancing the Kibana diagnostic tool to pull from this API. One question that was brought up was the fact that it is a POST request. We can inject the appropriate 'kbn-xsrf' and 'elastic-api-version: 1' headers for this to the diagnostic tool.

What I was wondering now is the list payload that is required for this endpoint. Looking at this file, I am wondering how would we pass the list of SLOs? Looks like all requests in kibana yml file are GET requests, no? Could we make the list prop optional and if not passed, then it accepts all SLOs by default? What are your thoughts on this?

[kdelemme]

We have to limit to the provided list because fetching all SLOs at once would be too much in some case. Same way we don't return all SLOs in the find API.

But what we can do instead, is use directly the transform stats endpoint from this diagnostic tool with the slo-* id, this will return in one request all the SLO transform stats. (I think there is still a limit on this API, like 1000)
Then the diagnostic tool could filter & transform the result to keep only the health.status part of it, or return the payload as is.

This API is already available and GET.

[shahzad31]

LGTM !!

[kibana-ci]

💛 Build succeeded, but was flaky

• Buildkite Build
• Commit: 89ea0b4
• Kibana Serverless Image: docker.elastic.co/kibana-ci/kibana-serverless:pr-181351-89ea0b4f533c
• Observability Deployment

Failed CI Steps

• FTR Configs #62
• FTR Configs #63

Test Failures

• [job] [logs] FTR Configs #63 / console app "after all" hook: afterTestSuite.trigger in "console app"
• [job] [logs] FTR Configs #63 / console app Console variables "after all" hook: afterTestSuite.trigger for "should allow removing a variable"
• [job] [logs] FTR Configs #63 / console app Console variables "before all" hook for "should allow creating a new variable"
• [job] [logs] FTR Configs #62 / Saved Objects Management saved objects management with hidden types API calls should flag the object as hidden in its meta

Metrics [docs]

Module Count

Fewer modules leads to a faster build time

id	before	after	diff
observability	510	512	+2
slo	740	745	+5
total			+7

Public APIs missing comments

Total count of every public API that lacks a comment. Target amount is 0. Run node scripts/build_api_docs --plugin [yourplugin] --stats comments for more detailed information.

id	before	after	diff
@kbn/slo-schema	173	179	+6

Async chunks

Total size of all lazy-loaded chunks that will be downloaded as the user navigates the app

id	before	after	diff
slo	720.3KB	726.3KB	+6.1KB

Canvas Sharable Runtime

The Canvas "shareable runtime" is an bundle produced to enable running Canvas workpads outside of Kibana. This bundle is included in third-party webpages that embed canvas and therefor should be as slim as possible.

id	before	after	diff
module count	-	5875	+5875
total size	-	6.7MB	+6.7MB

Page load bundle

Size of the bundles that are downloaded on every page load. Target size is below 100kb

id	before	after	diff
observability	150.8KB	151.1KB	+370.0B
slo	22.3KB	22.4KB	+126.0B
total			+496.0B

Unknown metric groups

API count

id	before	after	diff
@kbn/slo-schema	173	179	+6

History

• 💔 Build #206799 failed b81c4be
• 💛 Build #206388 was flaky 82df712
• 💛 Build #205996 was flaky 4a606ee
• 💚 Build #205739 succeeded c679389
• 💚 Build #205700 succeeded f30e309

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