Error: nginx restart failed when adding SSL to a domain

I get error Error: nginx restart failed when adding SSL to a domain.

Followed all steps mentioed at Server configuration | Hestia Control Panel to fix Error: 24: Too many open files

root@portal ~ # nginx -t
nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
nginx: [emerg] open() “/var/log/nginx/domains/domain.com.log” failed (24: Too many open files)
nginx: configuration file /etc/nginx/nginx.conf test failed
root@portal ~ #

Debian

nginx.conf file:

Server globals

user www-data;
worker_processes auto;
worker_rlimit_nofile 65536;
error_log /var/log/nginx/error.log;
pid /run/nginx.pid;
include /etc/nginx/conf.d/main/.conf;
include /etc/nginx/modules-enabled/
.conf;

Worker config

events {
worker_connections 1024;
use epoll;
multi_accept on;
}

http {
# Main settings
sendfile on;
tcp_nopush on;
tcp_nodelay on;
client_header_timeout 180s;
client_body_timeout 180s;
client_header_buffer_size 2k;
client_body_buffer_size 256k;
client_max_body_size 1024m;
large_client_header_buffers 4 8k;
send_timeout 60s;
keepalive_timeout 30s;
keepalive_requests 1000;
reset_timedout_connection on;
server_tokens off;
server_name_in_redirect off;
server_names_hash_max_size 512;
server_names_hash_bucket_size 512;
charset utf-8;
# FastCGI settings
fastcgi_buffers 512 4k;
fastcgi_buffer_size 256k;
fastcgi_busy_buffers_size 256k;
fastcgi_temp_file_write_size 256k;
fastcgi_connect_timeout 30s;
fastcgi_read_timeout 300s;
fastcgi_send_timeout 180s;
fastcgi_cache_lock on;
fastcgi_cache_lock_timeout 5s;
fastcgi_cache_background_update on;
fastcgi_cache_revalidate on;
# Proxy settings
proxy_redirect off;
proxy_set_header Host $host;
proxy_set_header Early-Data $rfc_early_data;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_pass_header Set-Cookie;
proxy_buffers 256 4k;
proxy_buffer_size 32k;
proxy_busy_buffers_size 32k;
proxy_temp_file_write_size 256k;
proxy_connect_timeout 30s;
proxy_read_timeout 300s;
proxy_send_timeout 180s;
# Log format
log_format main ‘$remote_addr - $remote_user [$time_local] $request “$status” $body_bytes_sent “$http_referer” “$http_user_agent” “$http_x_forwarded_for”’;
log_format bytes ‘$body_bytes_sent’;
log_not_found off;
access_log off;
# Mime settings
include /etc/nginx/mime.types;
default_type application/octet-stream;
# Compression
gzip on;
gzip_vary on;
gzip_static on;
gzip_comp_level 6;
gzip_min_length 1024;
gzip_buffers 128 4k;
gzip_http_version 1.1;
gzip_types text/css text/javascript text/js text/plain text/richtext text/shtml text/x-component text/x-java-source text/x-markdown text/x-script text/xml image/bmp image/svg+xml image/vnd.microsoft.icon image/x-icon font/otf font/ttf font/x-woff multipart/bag multipart/mixed application/eot application/font application/font-sfnt application/font-woff application/javascript application/javascript-binast application/json application/ld+json application/manifest+json application/opentype application/otf application/rss+xml application/ttf application/truetype application/vnd.api+json application/vnd.ms-fontobject application/wasm application/xhtml+xml application/xml application/xml+rss application/x-httpd-cgi application/x-javascript application/x-opentype application/x-otf application/x-perl application/x-protobuf application/x-ttf;
gzip_proxied any;
# Cloudflare IPs
include /etc/nginx/conf.d/cloudflare.inc;
# SSL PCI compliance
ssl_buffer_size 1369;
ssl_ciphers “ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA384:DHE-RSA-AES256-SHA256”;
ssl_dhparam /etc/ssl/dhparam.pem;
ssl_early_data on;
ssl_ecdh_curve auto;
ssl_prefer_server_ciphers on;
ssl_protocols TLSv1.2 TLSv1.3;
ssl_session_cache shared:SSL:20m;
ssl_session_tickets on;
ssl_session_timeout 7d;
resolver 185.12.64.1 185.12.64.2 valid=300s ipv6=off;
resolver_timeout 5s;
# Error pages
error_page 403 /error/404.html;
error_page 404 /error/404.html;
error_page 410 /error/410.html;
error_page 500 501 502 503 504 505 /error/50x.html;
# Proxy cache
proxy_cache_path /var/cache/nginx levels=2 keys_zone=cache:10m inactive=60m max_size=1024m;
proxy_cache_key “$scheme$request_method$host$request_uri”;
proxy_temp_path /var/cache/nginx/temp;
proxy_ignore_headers Cache-Control Expires;
proxy_cache_use_stale error timeout invalid_header updating http_502;
proxy_cache_valid any 1d;
# FastCGI cache
fastcgi_cache_path /var/cache/nginx/micro levels=1:2 keys_zone=microcache:10m inactive=30m max_size=1024m;
fastcgi_cache_key “$scheme$request_method$host$request_uri”;
fastcgi_ignore_headers Cache-Control Expires Set-Cookie;
fastcgi_cache_use_stale error timeout invalid_header updating http_500 http_503;
add_header X-FastCGI-Cache $upstream_cache_status;

# Cache bypass
map $http_cookie $no_cache {
	default              0;
	~SESS                1;
	~wordpress_logged_in 1;
}

# File cache (static assets)
open_file_cache                 max=10000 inactive=30s;
open_file_cache_valid           60s;
open_file_cache_min_uses        2;
open_file_cache_errors          off;
# Wildcard include
include                         /etc/nginx/conf.d/*.conf;
include                         /etc/nginx/conf.d/domains/*.conf;

}

What is the reason why it crashes:

systemctl status nginx
nginx -t

root@portal ~ # systemctl status nginx
● nginx.service - nginx - high performance web server
Loaded: loaded (/etc/systemd/system/nginx.service; enabled; preset: enabled)
Drop-In: /etc/systemd/system/nginx.service.d
└─override.conf
Active: active (running) since Thu 2025-01-23 17:47:33 IST; 59s ago
Docs: nginx documentation
Process: 137250 ExecStart=/usr/sbin/nginx -c /etc/nginx/nginx.conf (code=exited, status=0/SUCCE>
Main PID: 137252 (nginx)
Tasks: 19 (limit: 76156)
Memory: 93.3M
CPU: 461ms
CGroup: /system.slice/nginx.service
├─137252 “nginx: master process /usr/sbin/nginx -c /etc/nginx/nginx.conf”
├─137253 “nginx: worker process”
├─137254 “nginx: worker process”
├─137255 “nginx: worker process”
├─137256 “nginx: worker process”
├─137257 “nginx: worker process”
├─137258 “nginx: worker process”
├─137259 “nginx: worker process”
├─137260 “nginx: worker process”
├─137261 “nginx: worker process”
├─137262 “nginx: worker process”
├─137263 “nginx: worker process”
├─137264 “nginx: worker process”
├─137265 “nginx: worker process”
├─137266 “nginx: worker process”
├─137267 “nginx: worker process”
├─137268 “nginx: worker process”
├─137269 “nginx: cache manager process”
└─137270 “nginx: cache loader process”

Jan 23 17:47:32 portal.domain.com systemd[1]: Starting nginx.service - nginx - high performance>
Jan 23 17:47:33 portal.domain.com systemd[1]: Started nginx.service - nginx - high performance >
lines 2-34/34 (END)

root@portal ~ # nginx -t
nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
nginx: [emerg] open() “/var/log/nginx/domains/domain.com.log” failed (24: Too many open files)
nginx: configuration file /etc/nginx/nginx.conf test failed
root@portal ~ #

This

and this

helped me resolve the issue for now.

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