Control panel gives 502 Bad gateway after upgrading from Debian 8 to Debian 9

Php seems ok as in running:

Code:

[ ok ] Starting php7.0-fpm (via systemctl): php7.0-fpm.service.

ispconfig.vhost in /etc/nginx/sites-available looks normal:

Code:

server {
        listen 8080 ssl;
        listen [::]:8080 ssl ipv6only=on;

                ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
        ssl_certificate /usr/local/ispconfig/interface/ssl/ispserver.crt;
        ssl_certificate_key /usr/local/ispconfig/interface/ssl/ispserver.key;
        ssl_ciphers 'ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES128$
        ssl_prefer_server_ciphers on;

                # redirect to https if accessed with http
                error_page 497 https://$host:8080$request_uri;

        server_name _;

        root   /usr/local/ispconfig/interface/web/;

        client_max_body_size 20M;

        location / {
               index index.php index.html;
        }

        # serve static files directly
        location ~* ^.+\.(jpg|jpeg|gif|css|png|js|ico|html|xml|txt)$ {
               access_log        off;
        }

        location ~ \.php$ {
               try_files $uri =404;
               include /etc/nginx/fastcgi_params;
               fastcgi_pass unix:/var/lib/php7.0-fpm/ispconfig.sock;
               fastcgi_index index.php;
               fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
               #fastcgi_param PATH_INFO $fastcgi_script_name;
               fastcgi_buffer_size 128k;
               fastcgi_buffers 256 4k;
               fastcgi_busy_buffers_size 256k;
               fastcgi_temp_file_write_size 256k;
               fastcgi_read_timeout 1200;
                           fastcgi_param HTTP_PROXY "";
        }

        location ~ /\. {
               deny  all;
        }
}

log shows:

Code:

2019/12/13 11:36:14 [crit] 1845#1845: *1301 connect() to unix:/var/lib/php7.0-fpm/ispconfig.sock failed (13: Permission denied) while connecting to upstream, client: 96.44.94.99, server: _, request: "GET / HTTP/1.1", upstream: "fastcgi://unix:/var/lib/php7.0-fpm/ispconfig.sock:", host: "cp.xxx.com:8080"

 

Only control panel, or all pages?
Does this file exist? /var/lib/php7.0-fpm/ispconfig.sock
What is in the nginx error log?
Have you restarted the server after the upgrade?

 

only on Control panel

yes it exists

Same as above

yes, no change.

 

Permissions:
/usr/local/ispconfig

Code:

drwxr-x---  9 ispconfig ispconfig 4096 Dec 30  2016 interface
drwxr-s---  3 root      ispconfig 4096 Mar 19  2018 security
drwxr-x--- 13 root      root      4096 Dec 13 05:02 server

 

Sry, haven't seen the edit.
Looks like nginx can't access the sock file. What gives?

Code:

ls -al /var/lib/php7.0-fpm/ispconfig.sock

What are (in comparison) the permissions of a web that works?

 

Code:

srwxrwxrwx 1 ispconfig ispconfig 0 Dec 13 14:51 /var/lib/php7.0-fpm/ispconfig.sock

The ones that work aren't using sockets they are using IPORT like this:

Code:

fastcgi_pass 127.0.0.1:9107;

 

As which user is nginx running? does that user have permissions to read the folder /var/lib/php7.0-fpm?
Try

Code:

chown www-data:www-data /var/lib/php7.0-fpm
systemctl restart nginx

 

yeah!!! that fixed it!!!