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web: Add init-container to manage django db migration

Merged web: Add init-container to manage django db migration
web-deal-with-django-migration into production
Merged Antoine R. Dumont requested to merge web-deal-with-django-migration into production
  1. Oct 10, 2023
    • Antoine R. Dumont's avatar
      web: Add init-container to manage django db migration · 56bed896
      Antoine R. Dumont authored 
      It's on by default and deactivated for the swh-next-version cassandra pod (to avoid
migrating too soon the db).

The real command within the init-container has been tested on our staging pod. And it's
running fine (doing the migration if needed, doing nothing after the first passing
migration passed).

It seems to be enough to have this init-container doing this simple migrate command as
the rolling upgrade triggers the installation of the new version of a pod one at a time.
So the next version pods (once the first is done and passed the migration) will start
and do noop migrations.

Refs. swh/infra/sysadm-environment#4780
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