Nginx error "1024 worker_connections are not enough" - amazon-web-services

Question

My website is running in a Docker Image using Nginx with reverse proxy.
Site is working prefectly for many hours under heavy traffic, but eventually it stops working and giving no response with 5** time out error.
In AWS Elastic Beanstalks Nginx-log I found this error-message:
[alert] 18037#0: 1024 worker_connections are not enough
I am afraid something is wrong with my custom Nginx-config,
but I do not understand what it is.
Code from https-redirect-docker-sc.config is attached.
I have tried to debug code to find any memory leaks or loops, but I can not find any solution.
files:
"/etc/nginx/sites-available/elasticbeanstalk-nginx-docker-proxy.conf":
owner: root
group: root
mode: "000755"
content: |
map $http_upgrade $connection_upgrade {
default "upgrade";
"" "";
}
server {
listen 80;
server_name mydomain.no;
return 301 https://www.mydomain.no$request_uri;
}
server {
listen 80 default_server;
gzip on;
gzip_comp_level 4;
gzip_types text/html text/plain text/css application/json application/x-javascript text/xml application/xml application/xml+rss text/javascript;
if ($time_iso8601 ~ "^(\d{4})-(\d{2})-(\d{2})T(\d{2})") {
set $year $1;
set $month $2;
set $day $3;
set $hour $4;
}
access_log /var/log/nginx/healthd/application.log.$year-$month-$day-$hour healthd;
access_log /var/log/nginx/access.log;
location / {
set $redirect 0;
if ($http_x_forwarded_proto != "https") {
set $redirect 1;
}
if ($http_user_agent ~* "ELB-HealthChecker") {
set $redirect 0;
}
if ($redirect = 1) {
return 301 https://$host$request_uri;
}
proxy_pass http://docker;
proxy_http_version 1.1;
proxy_set_header Connection $connection_upgrade;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
}
}

Answer 1

Default value for Nginx worker_connections is 1024, which is not enough for you.
Add events block before http in your nginx.conf, so it looks like this:
events {
worker_connections 4096; ## Default: 1024
}
http {
include conf/mime.types;
.....
}
You can also increase number of worker_processes(default = 1), so the total amount of connections your server can handle would be worker_processes * worker_connections
Please check here the full example configuration