Failed opening required '/var/www/html/lib/versioncheck.php'

Hi,
I use the official helm chart to deploy nextcloud on our internal kubernetes instance. The container went unhealthy every time. I disabled the probes. The container is marked as ready but I can not connect to the nextcloud, neither via browser or curl.

I connect into the container and want to execute php occ to get some logs, because php does not write their logs on stdout. I get the following error message:

$ php occ

Warning: require_once(/var/www/html/lib/versioncheck.php): failed to open stream: No such file or directory in /var/www/html/console.php on line 35

Fatal error: require_once(): Failed opening required '/var/www/html/lib/versioncheck.php' (include_path='.:/usr/local/lib/php') in /var/www/html/console.php on line 35

The complete lib folder is not available.

$ ls -la
total 108
drwxr-xr-x 1 www-data root   304 Jun 13 10:17 .
drwxr-xr-x 1 root     root    14 Jun 13 10:01 ..
-rw-r--r-- 1 www-data root  3032 Jun 13 10:17 .htaccess
-rw-r--r-- 1 www-data root   101 Jun 13 10:17 .user.ini
drwxr-xr-x 1 www-data root   778 Jun 13 10:17 3rdparty
-rw-r--r-- 1 www-data root 17234 Jun 13 10:17 AUTHORS
-rw-r--r-- 1 www-data root 34520 Jun 13 10:17 COPYING
drwxr-xr-x 1 www-data root  1098 Jun 13 10:15 apps
drwxr-xr-x 1 www-data root     0 Jun 13 10:01 config
-rw-r--r-- 1 www-data root  3893 Jun 13 10:17 console.php
-rw-r--r-- 1 www-data root  5083 Jun 13 10:17 cron.php
drwxr-xr-x 1 www-data root     0 Jun 13 10:01 custom_apps
drwxr-xr-x 1 www-data root     0 Jun 13 10:01 data
-rw-r--r-- 1 www-data root   156 Jun 13 10:17 index.html
-rw-r--r-- 1 www-data root  2960 Jun 13 10:17 index.php
-rwxr-xr-x 1 www-data root   283 Jun 13 10:17 occ
-rw-r--r-- 1 www-data root  3102 Jun 13 10:17 public.php
-rw-r--r-- 1 www-data root  5332 Jun 13 10:17 remote.php
-rw-r--r-- 1 www-data root    26 Jun 13 10:17 robots.txt
-rw-r--r-- 1 www-data root  2379 Jun 13 10:17 status.php
drwxr-xr-x 1 www-data root     0 Jun 13 10:01 themes

I tried additionally the nginx + fpm setup. There I run into the same error. I upgraded the image to 20.0.4-apache. This is the same image as we have deployed on a docker host. I removed the complete persistent volume, so that the containter can recreate the complete data directory, but I get this error, too. The lib directory is not available.

How is this possible that the directory is missing and how can I fix it? Here is an old thread with the same issue. It seems to be not fixed.

Next, I found that the permissions of the directory /var/www/html are incomplete. The owner/group of all mounted volumes is root:root. I changed the permissions manually to www-data:root. Otherwise has the container no access to the mounted directories. This should also be fixed.

Start by comparing the Helm chart's mounted paths with the Docker image filesystem, focusing on /var/www/html/lib/versioncheck.php and console.php. Reproduce the deployment with image 20.0.4-apache and inspect the mounted-volume ownership. Done means php occ can run and the container can access its mounted directories without manual permission changes.