4. Configure EC2 (editing)

Launch an EC2

Launch an EC2 that will run jar.

name: our-company-lunch-ec2-v6

os: Amazon Linux 2023 AMI

type: t2.micro

subnet: public

security group: allow HTTP

The name tag input here will be used at CodeDeploy configuration. The -v6 suffix is just my trial counts.

Install java and nginx

Connect to the EC2 terminal.

Switch to root user.

sudo -i

Update a package index.

dnf update -y

Install java.

dnf install -y java-21-amazon-corretto-headless

Install nginx.

dnf install -y nginx
systemctl start nginx
systemctl enable nginx

Configure nginx

vi /etc/nginx/conf.d/ourcompanylunch.conf

A filename inside conf.d doesn't matter. All config files will be loaded.

server {
    listen 80;
    server_name ec2-13-125-239-165.ap-northeast-2.compute.amazonaws.com;
    client_max_body_size 20M;

    location / {
        proxy_pass http://localhost:8080;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme; # original request scheme: helps to distinguish http and https
    }
}

This will relay a request from the designated address and port to localhost:8080.

A Spring server would be up and running on 8080 port.

client_max_body_size 20M for image upload.

server_names_hash_bucket_size

nginx server name length related.

vi /etc/nginx/nginx.conf

http {
    ...
    server_names_hash_bucket_size 128;
    ...
}

The default is 64.

https://serverfault.com/questions/656496/why-is-14-characters-the-maximum-length-for-the-nginx-server-name-directive

systemctl restart nginx