Nginx local fallback error page if proxy destination is unavailable
Solution 1:
Actually, I only had to slightly modify your config:
error_page 501 502 503 /500.html;
location = /500.html {
root /locust/www/fallback/htdocs;
}
and obviously rename the index.html you want to present to 500.html.
Solution 2:
Try to specify exact url for the error page like:
proxy_intercept_errors on;
error_page 500 502 503 504 402 403 401 /500.html;
root /locust/www/fallback/htdocs;