WP Update failed – File permission

Hello,

I don’t understood my file permission issue with my WordPress 5.7. I’m using Centos 8.

WP Health check say that : [Screenshot of Site Health][1]

I try to do an upadate and it doesn’t work, I got : The update cannot be installed because we will not be able to copy some files. This problem is usually due to inconsistencies in file permissions : wp-admin/includes/update-core.php

I’m not a beginner but despite my investigation I don’t find my issue. Here is all information that I checked :

– In the WP folder, I run :
chown apache:apache -R *
find . -type d -exec chmod 755 {} \;
find . -type f -exec chmod 644 {} \;

– My WP folder have a 775 permission

– I run chown apache:apache -R * in all my /var/www folder

– When I open with my web browser a test.php file which contains <?php echo(exec(‘whoami’)); ?> , I get apache

– When I exec with my centos user php test.php , I got centos

– When I exec ps aux | egrep ‘(apache|httpd)’ with my centos user, I got this : [Result of ps aux | egrep ‘(apache|httpd)’ ][2]

– When I exec with my Centos user sudo chmod 777 -R wordpress/ , the problem persist.

– I checked /var/log/php-fpm/www-error.log and there is : [16-Apr-2021 14:27:32 UTC] PHP Warning: copy(/var/www/wordpress/wp-admin/includes/update-core.php): failed to open stream: Permission denied in /var/www/wordpress/wp-admin/includes/class-wp-filesystem-direct.php on line 309

– Else, everything is working on my wordpress (I can upload media for example)

Thank you a lot in advance.

[1]: https://i.stack.imgur.com/B1Ulr.png
[2]: https://i.stack.imgur.com/p7L9U.png