Override nginx http version on location block - nginx

Question

I'm trying to set up end to end http2 connections on a Amazon Elastic Beanstalk application. I'm using node js and fastify with http2 support (it works great on my local machine). By defaul, the nginx reverse proxy that EB creates on the EC2 instance where the code gets deployed, uses http/1.1, so I need to change that.
I have read here how to do it (see reverse proxy configuration section). The problem is that if you see the nginx.conf file:
#Elastic Beanstalk Nginx Configuration File
user nginx;
error_log /var/log/nginx/error.log warn;
pid /var/run/nginx.pid;
worker_processes auto;
worker_rlimit_nofile 66982;
events {
worker_connections 1024;
}
http {
include /etc/nginx/mime.types;
default_type application/octet-stream;
log_format main '$remote_addr - $remote_user [$time_local] "$request" '
'$status $body_bytes_sent "$http_referer" '
'"$http_user_agent" "$http_x_forwarded_for"';
include conf.d/*.conf;
map $http_upgrade $connection_upgrade {
default "upgrade";
}
server {
listen 80 default_server;
access_log /var/log/nginx/access.log main;
client_header_timeout 60;
client_body_timeout 60;
keepalive_timeout 60;
gzip off;
gzip_comp_level 4;
gzip_types text/plain text/css application/json application/javascript application/x-javascript text/xml application/xml application/xml+rss text/javascript;
# Include the Elastic Beanstalk generated locations
include conf.d/elasticbeanstalk/*.conf;
}
}
In the last line include conf.d/elasticbeanstalk/*.conf;, a file 00_application.conf gets included. That file contains the following:
location / {
proxy_pass http://127.0.0.1:8080;
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;
}
And there you can see the proxy_http_version parameter I need to change to 2.0.
Any idea how can I achieve that? I can add configuration files to conf.d and replace the entire nginx.conf file, but I do not really know how to change that value from there.

Answer 1

Create a file with extension .config inside the .ebextension folder for example 01-mynginx.conf
Inside the config file, use the files key to create files on the instance and the container_commands key to run system commands after the application and web server has been set up
files:
“/etc/nginx/conf.d/01-mynginx.conf”:
mode: “000644”
owner: root
group: root
content: |
keepalive_timeout 120s;
proxy_connect_timeout 120s;
proxy_send_timeout 120s;
proxy_read_timeout 120s;
fastcgi_send_timeout 120s;
fastcgi_read_timeout 120s;
container_commands:
nginx_reload:
command: “sudo service nginx reload”
Elastic Beanstalk automatically creates the 01-mynginx.conf file inside /etc/nginx/conf.d folder and is included in the main elastic beanstalk nginx configuration.