[8.19] [Rollups] Add documentation for testing deprecated UI (elastic#240331) (elastic#240838)

# Backport

This will backport the following commits from `main` to `8.19`:
- [[Rollups] Add documentation for testing deprecated UI
(elastic#240331)](elastic#240331)

<!--- Backport version: 9.6.6 -->

### Questions ?
Please refer to the [Backport tool
documentation](https://github.com/sorenlouv/backport)

<!--BACKPORT
[{"author":{"name":"Copilot","email":"[email protected]"},"sourceCommit":{"committedDate":"2025-10-27T14:47:48Z","message":"[Rollups]
Add documentation for testing deprecated UI (elastic#240331)\n\nCloses
https://github.com/elastic/kibana/issues/230171\n\n## Summary\n\nThis PR
adds comprehensive testing documentation to the Rollups plugin\nREADME
to address the challenges of testing the Rollup UI after the\nfeature
was deprecated.\n\n---------\n\nCo-authored-by: copilot-swe-agent[bot]
<[email protected]>\nCo-authored-by:
ElenaStoeva
<[email protected]>\nCo-authored-by: Elena
Stoeva
<[email protected]>","sha":"f2e9706a1d3c8e7cb6c7575101ca53bda2924804","branchLabelMapping":{"^v9.3.0$":"main","^v(\\d+).(\\d+).\\d+$":"$1.$2"}},"sourcePullRequest":{"labels":["Team:Kibana
Management","release_note:skip","Feature:Rollups","💝community","backport:all-open","v9.3.0"],"title":"[Rollups]
Add documentation for testing deprecated
UI","number":240331,"url":"https://github.com/elastic/kibana/pull/240331","mergeCommit":{"message":"[Rollups]
Add documentation for testing deprecated UI (elastic#240331)\n\nCloses
https://github.com/elastic/kibana/issues/230171\n\n## Summary\n\nThis PR
adds comprehensive testing documentation to the Rollups plugin\nREADME
to address the challenges of testing the Rollup UI after the\nfeature
was deprecated.\n\n---------\n\nCo-authored-by: copilot-swe-agent[bot]
<[email protected]>\nCo-authored-by:
ElenaStoeva
<[email protected]>\nCo-authored-by: Elena
Stoeva
<[email protected]>","sha":"f2e9706a1d3c8e7cb6c7575101ca53bda2924804"}},"sourceBranch":"main","suggestedTargetBranches":[],"targetPullRequestStates":[{"branch":"main","label":"v9.3.0","branchLabelMappingKey":"^v9.3.0$","isSourceBranch":true,"state":"MERGED","url":"https://github.com/elastic/kibana/pull/240331","number":240331,"mergeCommit":{"message":"[Rollups]
Add documentation for testing deprecated UI (elastic#240331)\n\nCloses
https://github.com/elastic/kibana/issues/230171\n\n## Summary\n\nThis PR
adds comprehensive testing documentation to the Rollups plugin\nREADME
to address the challenges of testing the Rollup UI after the\nfeature
was deprecated.\n\n---------\n\nCo-authored-by: copilot-swe-agent[bot]
<[email protected]>\nCo-authored-by:
ElenaStoeva
<[email protected]>\nCo-authored-by: Elena
Stoeva
<[email protected]>","sha":"f2e9706a1d3c8e7cb6c7575101ca53bda2924804"}}]}]
BACKPORT-->

Co-authored-by: Copilot <[email protected]>
Co-authored-by: ElenaStoeva <[email protected]>
Co-authored-by: Elena Stoeva <[email protected]>

Author: 3 people

x-pack/platform/plugins/private/rollup/README.md

@@ -15,17 +15,74 @@ The rest of this doc dives into the implementation details of each of the above
 
 ## Quick steps for testing
 
-The pattern for creating a rollup job and rollup index pattern is:
-
-1. Install sample data (web logs is a good one).
-2. Create a rollup job with an index pattern that captures this index (e.g. `k*`).
-3. Set frequency to "minute". Clear the latency buffer field.
-4. Select the time field which is the same time field selected in the installed index pattern (`timestamp` without an `@` in the case of web logs).
-5. Specify a time bucket size (`10m` will do).
-6. Select a few terms, histogram, and metrics fields.
-7. Create and start the rollup job. Wait a minute for the job to run. You should see the numbers for documents and pages processed change in the detail panel.
-8. Create a rollup index pattern in the Index Patterns app.
-9. Now you can create visualizations using this index pattern.
+**Note:** Since Rollups has been deprecated, the UI is hidden unless there is an existing rollup job in the cluster. To test the Rollup UI, you must first create a rollup job using the workaround described below:
+
+1. **Start Elasticsearch and Kibana**
+
+2. **Add sample data** (e.g., "Sample web logs")
+
+3. **Create a mock rollup index** through Dev Tools Console to simulate rollup usage:
+   ```
+   PUT /mock_rollup_index
+   {
+     "mappings": {
+       "_meta": {
+         "_rollup": {
+           "id": "logs_job"
+         }
+       }
+     }
+   }
+   ```
+
+4. **Create a rollup job** through Dev Tools Console:
+   ```
+   PUT _rollup/job/logs_job
+   {
+     "id": "logs_job",
+     "index_pattern": "kibana_sample_data_logs",
+     "rollup_index": "rollup_logstash",
+     "cron": "* * * * * ?",
+     "page_size": 1000,
+     "groups": {
+       "date_histogram": {
+         "interval": "60m",
+         "delay": "7d",
+         "time_zone": "UTC",
+         "field": "@timestamp"
+       },
+       "terms": {
+         "fields": [
+           "geo.src",
+           "machine.os.keyword"
+         ]
+       },
+       "histogram": {
+         "interval": "1003",
+         "fields": [
+           "bytes",
+           "memory"
+         ]
+       }
+     }
+   }
+   ```
+
+5. **Delete the mock rollup index** (it causes issues for the rollup API used to fetch rollup indices):
+   ```
+   DELETE /mock_rollup_index
+   ```
+
+6. **Navigate to Stack Management > Rollup Jobs** to view the list of rollup jobs.
+
+### Steps for creating and running a rollup job in the UI
+
+1. Create a rollup job with an index pattern that captures an existing data (e.g. `kibana_sample_data_logs`).
+2. Set frequency to "minute". Clear the latency buffer field.
+3. Select the time field which is the same time field selected in the installed index pattern (`timestamp` without an `@` in the case of web logs).
+4. Specify a time bucket size (`10m` will do).
+5. Select a few terms, histogram, and metrics fields.
+6. Create and start the rollup job. Wait a minute for the job to run. You should see the numbers for documents and pages processed change in the detail panel.
 
 ---