Update Nextcloud 26.0.2 to 27.0.0

Hello,
I have nextcloud running in a docker enviroment.
Today I startet the update from version 26.0.2 to 27.0.0

If I open the nextcloud cloud, the following error appears:

Internal Server Error

The server encountered an internal error and was unable to complete your request.
Please contact the server administrator if this error reappears multiple times, please include the technical details below in your report.
More details can be found in the server log.

the nextcloud.log:

An unhandled exception has been thrown:
Doctrine\DBAL\Exception: Failed to connect to the database: An exception occurred in the driver: SQLSTATE[HY000] [2002] php_network_getaddresses: getaddrinfo for nextcloud-db failed: Name or service not known in /var/www/html/lib/private/DB/Connection.php:140
Stack trace:
#0 /var/www/html/3rdparty/doctrine/dbal/src/Connection.php(1531): OC\DB\Connection->connect()
#1 /var/www/html/3rdparty/doctrine/dbal/src/Connection.php(1029): Doctrine\DBAL\Connection->getWrappedConnection()
#2 /var/www/html/lib/private/DB/Connection.php(262): Doctrine\DBAL\Connection->executeQuery('SELECT * FROM `...', Array, Array, NULL)
#3 /var/www/html/3rdparty/doctrine/dbal/src/Query/QueryBuilder.php(345): OC\DB\Connection->executeQuery('SELECT * FROM `...', Array, Array)
#4 /var/www/html/lib/private/DB/QueryBuilder/QueryBuilder.php(280): Doctrine\DBAL\Query\QueryBuilder->execute()
#5 /var/www/html/lib/private/AppConfig.php(418): OC\DB\QueryBuilder\QueryBuilder->execute()
#6 /var/www/html/lib/private/AppConfig.php(184): OC\AppConfig->loadConfigValues()
#7 /var/www/html/lib/private/AppConfig.php(374): OC\AppConfig->getApps()
#8 /var/www/html/lib/private/legacy/OC_App.php(803): OC\AppConfig->getValues(false, 'installed_versi...')
#9 /var/www/html/lib/private/Server.php(733): OC_App::getAppVersions()
#10 /var/www/html/lib/private/AppFramework/Utility/SimpleContainer.php(171): OC\Server->OC\{closure}(Object(OC\Server))
#11 /var/www/html/3rdparty/pimple/pimple/src/Pimple/Container.php(122): OC\AppFramework\Utility\SimpleContainer->OC\AppFramework\Utility\{closure}(Object(Pimple\Container))
#12 /var/www/html/lib/private/AppFramework/Utility/SimpleContainer.php(138): Pimple\Container->offsetGet('OC\\Memcache\\Fac...')
#13 /var/www/html/lib/private/ServerContainer.php(171): OC\AppFramework\Utility\SimpleContainer->query('OC\\Memcache\\Fac...', true)
#14 /var/www/html/lib/private/AppFramework/Utility/SimpleContainer.php(65): OC\ServerContainer->query('OC\\Memcache\\Fac...')
#15 /var/www/html/lib/private/AppFramework/Utility/SimpleContainer.php(193): OC\AppFramework\Utility\SimpleContainer->get('OC\\Memcache\\Fac...')
#16 /var/www/html/lib/private/AppFramework/Utility/SimpleContainer.php(171): OC\AppFramework\Utility\SimpleContainer->OC\AppFramework\Utility\{closure}(Object(OC\Server))
#17 /var/www/html/3rdparty/pimple/pimple/src/Pimple/Container.php(118): OC\AppFramework\Utility\SimpleContainer->OC\AppFramework\Utility\{closure}(Object(Pimple\Container))
#18 /var/www/html/lib/private/AppFramework/Utility/SimpleContainer.php(138): Pimple\Container->offsetGet('OCP\\ICacheFacto...')
#19 /var/www/html/lib/private/ServerContainer.php(171): OC\AppFramework\Utility\SimpleContainer->query('OCP\\ICacheFacto...', true)
#20 /var/www/html/lib/private/AppFramework/Utility/SimpleContainer.php(65): OC\ServerContainer->query('OCP\\ICacheFacto...')
#21 /var/www/html/lib/private/Server.php(1115): OC\AppFramework\Utility\SimpleContainer->get('OCP\\ICacheFacto...')
#22 /var/www/html/lib/private/AppFramework/Utility/SimpleContainer.php(171): OC\Server->OC\{closure}(Object(OC\Server))
#23 /var/www/html/3rdparty/pimple/pimple/src/Pimple/Container.php(122): OC\AppFramework\Utility\SimpleContainer->OC\AppFramework\Utility\{closure}(Object(Pimple\Container))
#24 /var/www/html/lib/private/AppFramework/Utility/SimpleContainer.php(138): Pimple\Container->offsetGet('OCP\\Lock\\ILocki...')
#25 /var/www/html/lib/private/ServerContainer.php(171): OC\AppFramework\Utility\SimpleContainer->query('OCP\\Lock\\ILocki...', true)
#26 /var/www/html/lib/private/AppFramework/Utility/SimpleContainer.php(65): OC\ServerContainer->query('OCP\\Lock\\ILocki...')
#27 /var/www/html/lib/private/Server.php(2067): OC\AppFramework\Utility\SimpleContainer->get('OCP\\Lock\\ILocki...')
#28 /var/www/html/lib/private/Files/View.php(106): OC\Server->getLockingProvider()
#29 /var/www/html/lib/private/Server.php(467): OC\Files\View->__construct()
#30 /var/www/html/lib/private/AppFramework/Utility/SimpleContainer.php(171): OC\Server->OC\{closure}(Object(OC\Server))
#31 /var/www/html/3rdparty/pimple/pimple/src/Pimple/Container.php(122): OC\AppFramework\Utility\SimpleContainer->OC\AppFramework\Utility\{closure}(Object(Pimple\Container))
#32 /var/www/html/lib/private/AppFramework/Utility/SimpleContainer.php(138): Pimple\Container->offsetGet('OC\\Files\\Node\\H...')
#33 /var/www/html/lib/private/ServerContainer.php(171): OC\AppFramework\Utility\SimpleContainer->query('OC\\Files\\Node\\H...', true)
#34 /var/www/html/lib/private/AppFramework/Utility/SimpleContainer.php(65): OC\ServerContainer->query('OC\\Files\\Node\\H...')
#35 /var/www/html/lib/private/Server.php(1469): OC\AppFramework\Utility\SimpleContainer->get('OC\\Files\\Node\\H...')
#36 /var/www/html/lib/base.php(631): OC\Server->boot()
#37 /var/www/html/lib/base.php(1173): OC::init()
#38 /var/www/html/console.php(48): require_once('/var/www/html/l...')
#39 /var/www/html/occ(11): require_once('/var/www/html/c...')
#40 {main}root@raspberrypi:~#

Hope you can help.

Thanks in advance.

Best regards
TiDO

The container that is running your db server (nextcloud-db) is either offline or unreachable from the NC container.

  • Check your whole stack’s status
  • Make sure your Docker network config enables connectivity between those containers
  • Check your db container logs and db service logs
  • Post your entire Docker Compose file if still stuck