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503
Service Unavailable
The server is currently unable to handle the request due to maintenance or overloading.
Common Causes
- •Server maintenance
- •Server overloaded
- •Resource exhaustion
- •Rate limiting
- •Deployment in progress
Fix Solutions
Scale resources
Add more server capacity or optimize resource usage.
Check maintenance status
Verify if scheduled maintenance is in progress.
Code Examples
# Maintenance mode
server {
listen 80;
return 503;
error_page 503 @maintenance;
location @maintenance {
root /var/www/html;
rewrite ^(.*)$ /maintenance.html break;
}
}