[Bug 1802226] Re: [SRU] refresh memcached static assets after upgrade

[Łukasz Zemczak]

Thank you for validating! A few questions: I see the fix for this is
present in the horizon version in disco-proposed but the package seems
to be stuck there since 19 days due to unsatisfiable depends. Before
releasing any of the SRUs we'd have to make sure the fix in disco
migrates. Also, the horizon version for cosmic FTBFS on amd64 and still
needs verification.

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https://bugs.launchpad.net/bugs/1802226

Title:
  [SRU] refresh memcached static assets after upgrade

Status in Ubuntu Cloud Archive:
  Fix Committed
Status in Ubuntu Cloud Archive queens series:
  Fix Committed
Status in Ubuntu Cloud Archive rocky series:
  Fix Committed
Status in Ubuntu Cloud Archive stein series:
  Fix Committed
Status in horizon package in Ubuntu:
  In Progress
Status in horizon source package in Bionic:
  Fix Committed
Status in horizon source package in Cosmic:
  Fix Committed
Status in horizon source package in Disco:
  In Progress

Bug description:
  [Impact]
  After upgrading openstack-dashboard pkg,
  Because compressed css file name has been changed, 
  UI is broken

  affected B
  UCA Q

  keep testing the other releases and will update

  flushing or restarting memcached on openstack-dashboard fixes this
  issue.

  [Test Case]
  1. deploy openstack env
  2. install old pkg (e.g 13.0.1-0ubuntu1) on openstack-dashboard node
  3. apt install openstack-dashboard(this means upgrading)
  4. check web page

  [Regression]
  This patch flushes memcached's cache when installing pkg. It makes re-creating cache again so, it will be slow at first. Basically no effect to running cloud environment.

  [Others]


  [Original Description]
  Using Queens on Xenial.  We updated the packages to the current versions:

  ~$ apt-cache policy openstack-dashboard-ubuntu-theme
  openstack-dashboard-ubuntu-theme:
    Installed: 3:13.0.1-0ubuntu3~cloud0
    Candidate: 3:13.0.1-0ubuntu3~cloud0
    Version table:
   *** 3:13.0.1-0ubuntu3~cloud0 500
          500 http://ubuntu-cloud.archive.canonical.com/ubuntu xenial-updates/queens/main amd64 Packages
          100 /var/lib/dpkg/status
       2:9.1.2-0ubuntu5 500
          500 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages
       2:9.0.0-0ubuntu2 500
          500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages

  Using the Ubuntu theme results in a page full of garbage, missing css.
  The browser reports the following in consoles:

  The requested URL /static/dashboard/css/6e9a9fafb1ba.css was not found
  on this server.

  If I use other themes, it seems OK, just this one.

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