[Bug 2134985] Re: ceph-mgr-dashboard renders blank page due to missing JavaScript files in package 19.2.3

[Matthew Ruffell]

Debdiff for plucky

** Patch added: "Debdiff for ceph on plucky"
   https://bugs.launchpad.net/ubuntu/+source/ceph/+bug/2134985/+attachment/5934554/+files/lp2134985_plucky.debdiff

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https://bugs.launchpad.net/bugs/2134985

Title:
  ceph-mgr-dashboard renders blank page due to missing JavaScript files
  in package 19.2.3

Status in ceph package in Ubuntu:
  In Progress
Status in ceph source package in Noble:
  In Progress
Status in ceph source package in Plucky:
  In Progress
Status in ceph source package in Questing:
  In Progress
Status in ceph source package in Resolute:
  In Progress

Bug description:
  Summary:
  The ceph-mgr-dashboard fails to load the user interface after upgrading the ceph package to version 19.2.3-0ubuntu0.24.04.1 on Ubuntu 24.04 LTS.

  Instead of the login screen, the browser renders a completely blank
  white page. The browser console confirms that the server returns 404
  Not Found errors for critical JavaScript files required to render the
  application.

  This appears to be a regression in the packaging or build process for
  19.2.3, where the compiled frontend artifacts (JavaScript bundles)
  were not correctly included in the final .deb package in
  /usr/share/ceph/mgr/dashboard/frontend/dist/.

  Affected Package:
  * ceph-mgr-dashboard
  * Version: 19.2.3-0ubuntu0.24.04.1
  * Release: Ubuntu 24.04.3 LTS (Noble Numbat)

  Steps to Reproduce:
  1. On a system running Ubuntu 24.04, install or upgrade to the affected version:
     sudo apt install ceph-mgr-dashboard=19.2.3-0ubuntu0.24.04.1

  2. Enable the dashboard module:
     ceph mgr module enable dashboard

  3. Navigate to the dashboard URL in a web browser:
     http://<mgr-ip>:8080/

  Expected Result:
  The Ceph Dashboard login page should load successfully.

  Actual Result:
  * The browser displays a blank white page.
  * Browser Console/Network Tab: Requests for .js files (e.g., main.js, runtime.js, or similar chunks) return 404 Not Found.

  Scope and Root Cause:
  It is highly probable that this error affects all new Ubuntu packages derived from this source, as the debian/clean file has been modified in all of them. This suggests the aggressive cleaning or exclusion of build artifacts is a systemic issue introduced by the recent packaging changes.

  Development Branch Status:
  This packaging issue is also present in the ubuntu/devel branch. A Merge Proposal has already been created to fix the underlying build/clean logic in the packaging source.

  System Information:
  Description:    Ubuntu 24.04.3 LTS
  Release:        24.04

  Package Policy:
  ceph-mgr-dashboard:
    Installed: 19.2.3-0ubuntu0.24.04.1
    Candidate: 19.2.3-0ubuntu0.24.04.1
    Version table:
   *** 19.2.3-0ubuntu0.24.04.1 500
          500 http://archive.ubuntu.com/ubuntu noble-updates/universe amd64 Packages
          100 /var/lib/dpkg/status
       19.2.0-0ubuntu0.24.04.2 500
          500 http://security.ubuntu.com/ubuntu noble-security/universe amd64 Packages
       19.2.0~git20240301.4c76c50-0ubuntu6 500
          500 http://archive.ubuntu.com/ubuntu noble/universe amd64 Packages
  No LSB modules are available.
  Description:    Ubuntu 24.04.3 LTS
  Release:        24.04

  Evidence:
  Listing the directory /usr/share/ceph/mgr/dashboard/frontend/dist/ shows missing JavaScript assets compared to previous working versions.

  The following command can be used to confirm the missing files (returns empty list on affected systems):
  ls -l /usr/share/ceph/mgr/dashboard/frontend/dist/*/*.js | head -n 100

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