Kubernetes - Redeploying not working when using S3 as default storage backend

[LunaticZorr]

Nextcloud version (eg, 12.0.2): 16.0.4 Operating system and version (eg, Ubuntu 17.04): Kubernetes / Docker Apache or nginx version (eg, Apache 2.4.25): Docker Image nextcloud:16.0.4-apache PHP version (eg, 7.1): Docker Image nextcloud:16.0.4-apache

The issue you are facing:

• We are deploying Nextcloud on Kubernetes using the Helm Chart from https://github.com/helm/charts/tree/master/stable/nextcloud .
• We changed the Docker image to be nextcloud:16.0.4-apache
• We use the s3.config.php option to store our files on S3.
• We use the external database option to use a MariaDB server we already have.

We launch Nextcloud the first time and it creates the DB correctly, creates the first user correctly, and starts up as expected. We can login, and create / upload files. To verify our files are secure and retrievable after a major failure, we re-deploy the Nextcloud deployment (scale to 0, scale to 1). After this, while starting the logs show the following:

Initializing nextcloud 16.0.4.1 ...
Initializing finished
New nextcloud instance
Installing with MySQL database
starting nextcloud installation
The username is already being used
retrying install...
The username is already being used
retrying install...
The username is already being used
retrying install...

This is the first issue. WHY does it try to re-install? The Database is still there, and so is the previous user. Why does it not just connect and re-use what is there?

After a couple of minutes the container dies and starts again, this time without failure. BUT, when trying to browse to nextcloud, we are greeted with the following message:

Error
It looks like you are trying to reinstall your Nextcloud. However the file CAN_INSTALL is missing from your config directory. Please create the file CAN_INSTALL in your config folder to continue.

If I create the CAN_INSTALL file, I am prompted with the installation/setup screen and am told that the admin account I want to use does already exist.

Is this the first time you've seen this error? (Y/N): Y

The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):

<?php
$CONFIG = array (
  'debug' => true,
  'htaccess.RewriteBase' => '/',
  'memcache.local' => '\\OC\\Memcache\\APCu',
  'apps_paths' => 
  array (
    0 => 
    array (
      'path' => '/var/www/html/apps',
      'url' => '/apps',
      'writable' => false,
    ),
    1 => 
    array (
      'path' => '/var/www/html/custom_apps',
      'url' => '/custom_apps',
      'writable' => true,
    ),
  ),
  'objectstore' => 
  array (
    'class' => '\\OC\\Files\\ObjectStore\\S3',
    'arguments' => 
    array (
      'bucket' => 'nextcloud-files',
      'autocreate' => true,
      'key' => '**************',
      'secret' => '****************',
      'region' => 'eu-west-1',
      'use_ssl' => true,
    ),
  ),
  'passwordsalt' => '********************',
  'secret' => '******************',
  'trusted_domains' => 
  array (
    0 => 'localhost',
  ),
  'datadirectory' => '/var/www/html/data',
  'dbtype' => 'mysql',
  'version' => '16.0.4.1',
  'overwrite.cli.url' => 'http://localhost',
  'dbname' => 'nextcloud',
  'dbhost' => 'mariadb.mariadb',
  'dbport' => '',
  'dbtableprefix' => 'oc_',
  'mysql.utf8mb4' => true,
  'dbuser' => 'oc_user129',
  'dbpassword' => '*****************',
  'instanceid' => '************',
);

Any idea on how to solve this issue?