[SOLVED] 502 Bad Gateway error in Nginx.

hack3rcon · 12-02-2018, 05:58 AM

Hello.
I used https://websiteforstudents.com/insta...p-fpm-support/ tutorial for install Nginx and phpMyAdmin, but when I enter "IP/phpmyadmin" then I got "502 Bad Gateway" error.
Nginx log is:

Code:

$ cat /var/log/nginx/error.log
2018/12/02 03:19:37 [emerg] 587#587: "fastcgi_pass" directive is duplicate in /etc/nginx/sites-enabled/default:62
2018/12/02 03:19:46 [emerg] 614#614: "fastcgi_pass" directive is duplicate in /etc/nginx/sites-enabled/default:62
2018/12/02 03:24:05 [crit] 635#635: *2 connect() to unix:/var/run/php/php7.0-fpm.sock failed (2: No such file or directory) while connecting to upstream, client: 172.21.50.63, server: _, request: "GET /phpmyadmin/ HTTP/1.1", upstream: "fastcgi://unix:/var/run/php/php7.0-fpm.sock:", host: "172.20.100.62"
2018/12/02 03:24:20 [crit] 635#635: *2 connect() to unix:/var/run/php/php7.0-fpm.sock failed (2: No such file or directory) while connecting to upstream, client: 172.21.50.63, server: _, request: "GET /phpmyadmin/ HTTP/1.1", upstream: "fastcgi://unix:/var/run/php/php7.0-fpm.sock:", host: "172.20.100.62"
2018/12/02 03:31:19 [crit] 635#635: *5 connect() to unix:/var/run/php/php7.0-fpm.sock failed (2: No such file or directory) while connecting to upstream, client: 172.21.50.63, server: _, request: "GET /phpmyadmin/ HTTP/1.1", upstream: "fastcgi://unix:/var/run/php/php7.0-fpm.sock:", host: "172.20.100.62"

And line 62 of "/etc/nginx/sites-enabled/default" file is:

Code:

location ~ \.php$ {
                include snippets/fastcgi-php.conf;
        #
        #       # With php-fpm (or other unix sockets):
                fastcgi_pass unix:/var/run/php/php7.0-fpm.sock;
        #       # With php-cgi (or other tcp sockets):
        #       fastcgi_pass 127.0.0.1:9000;
        }

How can I solve it?

Thank you.

bathory · 12-02-2018, 09:14 AM

Quote:

I used https://websiteforstudents.com/insta...p-fpm-support/ tutorial for install Nginx and phpMyAdmin, but when I enter "IP/phpmyadmin" then I got "502 Bad Gateway" error.

Make sure that the php7.0-fpm service is running

Code:

sudo systemctl status php7.0-fpm

and has created the socket in the correct location

Code:

ls -l /var/run/php/php7.0-fpm.sock

so nginx can connect to it in order to serve php files.

Re. the duplicate fastcgi_pass make sure that you have only one uncommented-out in the various nginx/php-fpm config files

Regards

hack3rcon · 12-02-2018, 11:44 PM

Quote:

Originally Posted by bathory

Make sure that the php7.0-fpm service is running

Code:

sudo systemctl status php7.0-fpm

and has created the socket in the correct location

Code:

ls -l /var/run/php/php7.0-fpm.sock

so nginx can connect to it in order to serve php files.

Re. the duplicate fastcgi_pass make sure that you have only one uncommented-out in the various nginx/php-fpm config files

Regards

Thank you. I did:

Code:

$ sudo systemctl status php7.0-fpm
Unit php7.0-fpm.service could not be found.
$ ls -l /var/run/php/php7.0-fpm.sock
ls: cannot access '/var/run/php/php7.0-fpm.sock': No such file or directory

$ php -v
PHP 7.2.10-0ubuntu0.18.04.1 (cli) (built: Sep 13 2018 13:45:02) ( NTS )
Copyright (c) 1997-2018 The PHP Group
Zend Engine v3.2.0, Copyright (c) 1998-2018 Zend Technologies
    with Zend OPcache v7.2.10-0ubuntu0.18.04.1, Copyright (c) 1999-2018, by Zend Technologies

Why not exist?

hack3rcon · 12-03-2018, 12:02 AM

Problem solved. I did:

Code:

$ cd /var/run/php/
$ ls
php7.2-fpm.pid  php7.2-fpm.sock

And in "/etc/nginx/sites-available/default" file I changed "fastcgi_pass unix:/var/run/php/php7.0-fpm.sock;" line to "fastcgi_pass unix:/var/run/php/php7.2-fpm.sock;".