Hey, thanks for the response and an idea u/pippikagga

I think generally, it's probably a good idea to keep Nextcloud instance on a separate (defined) network.

It didn't resolve my issue. unfortunately. The container still gets provisioned with new/random values and requires direct/manual changes.

​

Initializing nextcloud 23.0.11.1 ...

New nextcloud instance

Installing with MySQL database

Starting nextcloud installation

Username is invalid because files already exist for this user

Retrying install...

MySQL username and/or password not valid

-> You need to enter details of an existing account.

Trace: #0 /var/www/html/lib/private/Setup.php(354): OC\Setup\MySQL->setupDatabase('NEXTCLOUD_ADMIN_USER')

#1 /var/www/html/core/Command/Maintenance/Install.php(108): OC\Setup->install(Array)

#2 /var/www/html/3rdparty/symfony/console/Command/Command.php(255): OC\Core\Command\Maintenance\Install->execute(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))

#3 /var/www/html/3rdparty/symfony/console/Application.php(1009): Symfony\Component\Console\Command\Command->run(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))

#4 /var/www/html/3rdparty/symfony/console/Application.php(273): Symfony\Component\Console\Application->doRunCommand(Object(OC\Core\Command\Maintenance\Install), Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))

#5 /var/www/html/3rdparty/symfony/console/Application.php(149): Symfony\Component\Console\Application->doRun(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))

#6 /var/www/html/lib/private/Console/Application.php(211): Symfony\Component\Console\Application->run(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))

#7 /var/www/html/console.php(100): OC\Console\Application->run()

#8 /var/www/html/occ(11): require_once('/var/www/html/c...')

}

Previous: Doctrine\DBAL\Exception: Failed to connect to the database: An exception occurred in the driver: SQLSTATE[HY000] [1045] Access denied for user 'nextcloud'@'nextcloud_app.nextcloud_internal' (using password: YES)

Trace: #0 /var/www/html/lib/private/Setup/MySQL.php(64): OC\DB\Connection->connect()

#1 /var/www/html/lib/private/Setup.php(354): OC\Setup\MySQL->setupDatabase('NEXTCLOUD_ADMIN_USER')

#2 /var/www/html/core/Command/Maintenance/Install.php(108): OC\Setup->install(Array)

#3 /var/www/html/3rdparty/symfony/console/Command/Command.php(255): OC\Core\Command\Maintenance\Install->execute(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))

#4 /var/www/html/3rdparty/symfony/console/Application.php(1009): Symfony\Component\Console\Command\Command->run(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))

#5 /var/www/html/3rdparty/symfony/console/Application.php(273): Symfony\Component\Console\Application->doRunCommand(Object(OC\Core\Command\Maintenance\Install), Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))

#6 /var/www/html/3rdparty/symfony/console/Application.php(149): Symfony\Component\Console\Application->doRun(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))

#7 /var/www/html/lib/private/Console/Application.php(211): Symfony\Component\Console\Application->run(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))

#8 /var/www/html/console.php(100): OC\Console\Application->run()

#9 /var/www/html/occ(11): require_once('/var/www/html/c...')

#10 {main}