[Bug 1705428] Re: charm install optimisations

[James Page]

** Also affects: nova (Ubuntu)
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1705428

Title:
  charm install optimisations

Status in OpenStack nova-compute charm:
  New
Status in nova package in Ubuntu:
  New

Bug description:
  Currently when e.g. nova-compute charm runs its install hook and
  installs the nova-compute package, that sequence will result in a the
  package configuring the database which, at that point is always the
  local sqlite db which in 99.9% cases is probably not the database that
  will ultimately be used i.e. the charm will generally end up being
  related to mysql and re-initialising the database. If the charm could
  somehow know (via config?) that this is happening and avoid the double
  initialisation, we could shave some time off the install process (and
  same disk i/o etc for converged deployments where applications are
  being deployed on the same host in parallel). This applies to all
  Openstack charms that use a database.

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