1

I run an nginx server with 40 identical webapps on 40 different ports in 40 different PHP-FPM pools. Each pool is run on a separate user.

My sessions.save_path in php.ini is /tmp/php_sessions. Let's say I first visit http://mywebsite.com:5007. I can observe this file pop up in /tmp/php_sessions:

-rw------- 1 www-data07 www-data07     0 jan.  17 00:35 sess_bb84gmtago2u33g1jmtbhdcu80

Then I visit http://mywebsite.com:5008. In my browser, I can read this error

Warning: Unknown: open(/tmp/php_sessions/sess_bb84gmtago2u33g1jmtbhdcu80, O_RDWR) failed: Permission denied (13) in Unknown on line 0

Warning: Unknown: Failed to write session data (files). Please verify that the current setting of session.save_path is correct (/tmp/php_sessions) in Unknown on line 0

I get that this is because the user www-data08 is trying to write to a file where only www-data07 has write permissions. But why doesn't www-data08 make it's own session data? How can I fix this?

0

I was slightly fast on the trigger here. In my particular instance, the problem was that all 40 webapps shared the same cookie in my browser. When I moved from port 5007 to port 5008, my browser was trying to continue my session from port 5007, but with a different backend UID.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.