Nginx + PHP-FPM 7.1 - 504 Gateway Time-out - php

Question

I'm running a nginx 1.12 and a php-fpm 7.1 as seperate docker containers on a synology nas and i get a 504 Gateway error if the php-script runs longer than 60s. I've tried already several nginx configuration parameters but the error still exists.
Here is my actual nginx config:
#user www-data;
#group http
worker_processes 1;
error_log /opt/data/logs/nginx_error.log notice;
events {
worker_connections 1024;
}
http {
include mime.types;
default_type application/octet-stream;
#keepalive_timeout 30s;
sendfile on;
#tcp_nopush off;
tcp_nodelay on;
#gzip off;
send_timeout 300
server {
listen 80;
server_name "";
root /opt/php;
index index.php;
location /data/ {
sendfile on;
root /opt;
}
location ~ \.php$ {
include fastcgi_params;
fastcgi_split_path_info ^(.+?\.php)(/.*)$;
if (!-f $document_root$fastcgi_script_name) {
return 404;
}
# Mitigate https://httpoxy.org/ vulnerabilities
fastcgi_param HTTP_PROXY "";
fastcgi_pass php:9000;
fastcgi_index index.php;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
fastcgi_read_timeout 300;
#fastcgi_buffering off;
#fastcgi_keep_conn on;
#fastcgi_intercept_errors on;
#fastcgi_cache off;
#fastcgi_ignore_client_abort on;
}
location ~ ^/(status|ping)$ {
access_log off;
include fastcgi_params;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
fastcgi_pass php:9000;
}
}
}
The php-testscript:
<?php
sleep(65);
echo "done!";
file_put_contents("/opt/data/timetest.txt", "\nEnd", FILE_APPEND);
After 60s the browser shows up the 504 Gateway Time-out. The php-script is still running and is also writing the text to the file.
Nginx errorlog:
2017/07/22 08:16:32 [error] 8#8: *10 upstream timed out (110: Connection timed out) while reading response header from upstream, client: 172.17.0.1, server: , request: "GET /timetest.php HTTP/1.1", upstream: "fastcgi://172.17.0.3:9000", host: "192.168.0.100:8081"
Has anyone an idea?

Answer 1

The question is probably why does your backend take so long to respond? Not sure about your usecase but normally it's not user-friendly to wait to long for a response.
To answer your question:
I found this link: https://easyengine.io/tutorials/php/increase-script-execution-time/
Add in /etc/php5/fpm/php.ini
max_execution_time = 300
Set in /etc/php5/fpm/pool.d/www.conf
request_terminate_timeout = 300
Set in /etc/nginx/nginx.conf
http {
#...
fastcgi_read_timeout 300;
#...
}
And in your config:
location ~ \.php$ {
include /etc/nginx/fastcgi_params;
fastcgi_pass unix:/var/run/php5-fpm.sock;
fastcgi_read_timeout 300;
}
And reload services
service php5-fpm reload
service nginx reload