Summary

Closes #100363

This change "nags" users to change a POST URL that was created in an older version of Kibana, by allowing an export to set a new field: payload.isDeprecated. This triggers logging and the UI to notify the user that the export type will not be supported in 8.0.

• Log warnings in the Kibana server logs when an export_types/csv job is created.
• Add a tooltip to the Reporting Management UI to notify users about reports that were created using legacy job params
• Use the deprecation service to alert admins before upgrading to 8.0 if they have existing CSV reports that were created using legacy job params.

Release notes

For CSV reports, using a POST URL copied from an older version of Kibana will result in a warning. A POST URL copied in Kibana 7.12 or lower will not be supported in 8.0. The POST URL should be regenerated in the latest version of Kibana for automation to continue seamlessly.

How to test

Testing requires copying a POST URL for CSV Export in Kibana 7.12, upgrading the instance to 7.x with this code change, and then send a POST request to the URL. Since the POST URL references a deprecated export type (/generate/csv), a warning gets logged in the Kibana server, and the job gets a warning treatment in the Reporting UI at Stack Management > Reporting.

Steps to set up a POST URL of the deprecated export type and send it to a 7.x Kibana instance with these changes:

1. Set up 7.12 and add some data:

   cd ~/elastic/kibana7
   git checkout 7.12
   git pull elastic 7.12
   nvm use $(cat .node-version)
   yarn kbn clean ; yarn kbn bootstrap
   yarn es snapshot -E path.data=../version_7_12_backup
   yarn start --no-base-path

2. Install sample data, add a saved search, copy the POST URL to export the CSV from Discover
3. Create a shell script that generates the CSV using the POST URL: generate_deprecated_csv.sh

   #!/bin/sh
   curl -u my_reporting_user -H 'kbn-version: ${KIBANA_VERSION}' -XPOST "<paste the POST URL>"

4. Test that the script successfully queues the job, and doesn't show a warning in the UI.

   KIBANA_VERSION=7.12.2 sh generate_deprecated_csv.sh

5. Stop Kibana and Elasticsearch
6. Switch to a branch of 7.x that has these code changes backported
7. Run the latest code and Elasticsearch with the backed up data

   git checkout 7.x
   git pull elastic 7.x
   nvm use $(cat .node-version)
   git cherry-pick "<get a squashed commit hash containing these code changes>"
   yarn kbn clean ; yarn kbn bootstrap
   yarn es snapshot -E path.data=../version_7_12_backup
   yarn start --no-base-path

8. Test that the deprecated POST URL script successfully queues the job, and shows warnings in the Kibana UI

   KIBANA_VERSION=7.14.0 sh generate_deprecated_csv.sh

Checklist

• Any text added follows EUI's writing guidelines, uses sentence case text and includes i18n support
• Documentation was added for features that require explanation or tutorials
• Unit or functional tests were updated or added to match the most common scenarios