Error when restore from backup

[khoazero123]

Describe the bug

When I restore from a backup, after logging back in and going to the "Sites List" page, there is an error:

nginx: [crit] pread() "/etc/nginx/modules-enabled/50-mod-http-image-filter.conf" failed (21: Is a directory)
nginx: configuration file /etc/nginx/nginx.conf test failed
exit status 1

To Reproduce
Steps to reproduce the behavior:

1. Go to nginx-ui webui
2. Click on Backup -> Backup -> Create Backup. Then I download the backup file and copied the security token.
3. Create new nginx-ui instance then choose "Restore from Backup" -> upload the backup file and paste security token.
4. Login to new nginx-ui instance
5. Go to Manage Sites/Sites List -> Error

Expected behavior
No error. All file in folder /etc/nginx/modules-enabled/ should be file, not directory.

Screenshots
If applicable, add screenshots to help explain your problem.

Info (please complete the following information):

• Server OS: Ubuntu 22.04
• Server Arch: x86
• Nginx UI Version: 2.1.17
• Your Browser: Chrome

Additional context
Add any other context about the problem here.

[0xJacky]

Please provide the output of "ls -la /etc/nginx/modules-enabled/" from the old machine and the same command from the new machine.

[khoazero123]

Here is output on old machine:

root@nginx-proxy-vm:~# ls -la /etc/nginx/modules-enabled/
total 16
drwxr-xr-x  2 root root 4096 May 17 18:48 .
drwxr-xr-x 11 root root 4096 May 19 22:12 ..
lrwxrwxrwx  1 root root   61 May 17 18:48 50-mod-http-image-filter.conf -> /usr/share/nginx/modules-available/mod-http-image-filter.conf
lrwxrwxrwx  1 root root   60 May 17 18:48 50-mod-http-xslt-filter.conf -> /usr/share/nginx/modules-available/mod-http-xslt-filter.conf
lrwxrwxrwx  1 root root   48 May 17 18:48 50-mod-mail.conf -> /usr/share/nginx/modules-available/mod-mail.conf
lrwxrwxrwx  1 root root   50 May 17 18:48 50-mod-stream.conf -> /usr/share/nginx/modules-available/mod-stream.conf

Here is output on new machine:

root@c68793213575:/# ls -la /etc/nginx/modules-enabled/
total 24
drwxr-xr-x  6 root root 4096 Oct  4 10:49 .
drwxr-xr-x 11 root root 4096 Oct  4 10:49 ..
drwxr-xr-x  2 root root 4096 Oct  4 10:49 50-mod-http-image-filter.conf
drwxr-xr-x  2 root root 4096 Oct  4 10:49 50-mod-http-xslt-filter.conf
drwxr-xr-x  2 root root 4096 Oct  4 10:49 50-mod-mail.conf
drwxr-xr-x  2 root root 4096 Oct  4 10:49 50-mod-stream.conf

[0xJacky]

Does the file /usr/share/nginx/modules-available/mod-http-image-filter.conf exist on the new machine?

[khoazero123]

Does the file /usr/share/nginx/modules-available/mod-http-image-filter.conf exist on the new machine?

Yes mate, They are exists before I restore. After I restore from backup, those files became folders

[0xJacky]

Could you please provide the output of "nginx -V" on the new machine?

[khoazero123]

Both are use same version

nginx version: nginx/1.18.0 (Ubuntu)
built with OpenSSL 1.1.1f  31 Mar 2020
TLS SNI support enabled
configure arguments: --with-cc-opt='-g -O2 -fdebug-prefix-map=/build/nginx-V1WJUN/nginx-1.18.0=. -fstack-protector-strong -Wformat -Werror=format-security -fPIC -Wdate-time -D_FORTIFY_SOURCE=2' --with-ld-opt='-Wl,-Bsymbolic-functions -Wl,-z,relro -Wl,-z,now -fPIC' --prefix=/usr/share/nginx --conf-path=/etc/nginx/nginx.conf --http-log-path=/var/log/nginx/access.log --error-log-path=/var/log/nginx/error.log --lock-path=/var/lock/nginx.lock --pid-path=/run/nginx.pid --modules-path=/usr/lib/nginx/modules --http-client-body-temp-path=/var/lib/nginx/body --http-fastcgi-temp-path=/var/lib/nginx/fastcgi --http-proxy-temp-path=/var/lib/nginx/proxy --http-scgi-temp-path=/var/lib/nginx/scgi --http-uwsgi-temp-path=/var/lib/nginx/uwsgi --with-debug --with-compat --with-pcre-jit --with-http_ssl_module --with-http_stub_status_module --with-http_realip_module --with-http_auth_request_module --with-http_v2_module --with-http_dav_module --with-http_slice_module --with-threads --with-http_addition_module --with-http_gunzip_module --with-http_gzip_static_module --with-http_image_filter_module=dynamic --with-http_sub_module --with-http_xslt_module=dynamic --with-stream=dynamic --with-stream_ssl_module --with-mail=dynamic --with-mail_ssl_module

[0xJacky]

The issue is due to the security mechanism limitations of the Nginx UI backup and restore function. Since the new module-path is /usr/lib/nginx/modules, and the symbolic link attempts to link to the files in /usr/share/nginx/modules-available, it was reverted to creating a folder. It seems that the security mechanism has been correctly activated, but the creation of the folder was unexpected. I should fix this and change the setting so that no folder is created in this situation.

[khoazero123]

Ok mate.