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Fix “503 Service Unavailable” When Uploading in Stackposts (aaPanel + Nginx + PHP 8.x)

Estimated reading: 2 minutes

💡 Summary

Fix 3 parts:
① PHP → increase upload & execution limits
② Nginx → raise timeouts & file size limits
③ PHP-FPM → increase workers and request timeout

✅ Step 1 – Configure PHP

In aaPanel → App Store → PHP 8.x → Setting → Configuration, set:

upload_max_filesize = 1024M
post_max_size = 1024M
memory_limit = 2048M
max_execution_time = 600
max_input_time = 600

→ Click SaveRestart PHP 8.x


✅ Step 2 – Configure Nginx

Open your domain config file:

/www/server/panel/vhost/nginx/post.domain.com.conf

and add (or update) the following inside the server { ... } block:

# --- Fix upload & timeout ---
client_max_body_size 1024M;
client_body_timeout 600s;
send_timeout 600s;
proxy_read_timeout 600s;
fastcgi_read_timeout 600s;
fastcgi_send_timeout 600s;

location ~ \.php$ {
fastcgi_pass unix:/tmp/php-cgi-8x.sock;
fastcgi_index index.php;
include fastcgi_params;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
fastcgi_connect_timeout 600;
fastcgi_read_timeout 600;
fastcgi_send_timeout 600;
}

(replace 8x with your PHP version, e.g. 80, 81, 82, 83)

SaveRestart Nginx


✅ Step 3 – Configure PHP-FPM

Open:

/www/server/php/8x/etc/php-fpm.conf

Find the [www] section and ensure:

[www]
listen = /tmp/php-cgi-8x.sock
listen.owner = www
listen.group = www
listen.mode = 0660

pm = dynamic
pm.max_children = 50
pm.start_servers = 5
pm.min_spare_servers = 5
pm.max_spare_servers = 35
pm.max_requests = 500
request_terminate_timeout = 600

→ Save → Restart PHP 8.x


✅ Step 4 – Test

  1. Open info.php → confirm php-fpm: active.

  2. Upload an image or video in Stackposts → ✅ No more 503 Service Unavailable.

 

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