NGINX on Aruba Cloud

Deploy NGINX as a web server or reverse proxy on Aruba Cloud using Terraform and cloud-init. This example provisions a production-ready NGINX instance with a default static site and optional automatic HTTPS via Certbot and an ACME provider such as Actalis or Let's Encrypt.

Provider version: arubacloud/arubacloud ~> 1.0 | Terraform: ≥ 1.9

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Introduction

NGINX is a high-performance HTTP server, reverse proxy, and load balancer. This example provisions a minimal VM running NGINX with:

• NGINX installed from Ubuntu 22.04 official packages
• A default static HTML site served from /var/www/html
• Ports 80 (HTTP) and 443 (HTTPS) open to web_cidr
• Optional automatic HTTPS via an ACME provider such as Actalis or Let's Encrypt / Certbot when domain and certbot_email are set

After deployment, replace the default site with your own content or additional server {} blocks for virtual hosting or reverse proxying.

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Architecture Overview

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Infrastructure Created

Resource	Name pattern	Description
arubacloud_project	nginx-prod	Project container
arubacloud_vpc	nginx-prod-vpc	Virtual Private Cloud
arubacloud_subnet	nginx-prod-subnet	Basic subnet
arubacloud_securitygroup	nginx-prod-vm-sg	Security group
arubacloud_securityrule	nginx-prod-vm-ssh	SSH ingress
arubacloud_securityrule	nginx-prod-vm-http	HTTP ingress TCP 80
arubacloud_securityrule	nginx-prod-vm-https	HTTPS ingress TCP 443
arubacloud_elasticip	nginx-prod-vm-eip	VM public IP
arubacloud_blockstorage	nginx-prod-boot	20 GB boot disk (Performance)
arubacloud_keypair	nginx-prod-keypair	SSH public key
arubacloud_cloudserver	nginx-prod-vm	CloudServer VM

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Estimated Monthly Cost

Resource	Spec	Est. cost/mo
CloudServer VM	CSO1A2 — 1 vCPU / 2 GB	~€9
Boot disk	20 GB Performance	~€3
Elastic IP	—	~€3
Total		~€15/mo

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Requirements

• Terraform ≥ 1.9
• ArubaCloud Terraform Provider ~> 1.0
• An ArubaCloud account with OAuth2 API credentials
• An SSH key pair
• (For HTTPS) A domain name with an A record pointing to the VM's Elastic IP

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Variables

Required

Variable	Description
arubacloud_client_id	ArubaCloud OAuth2 client ID
arubacloud_client_secret	ArubaCloud OAuth2 client secret
ssh_public_key	SSH public key content

Optional

Variable	Default	Description
app_name	"nginx"	Short name used in all resource names
environment	"prod"	Environment label
location	"ITBG-Bergamo"	ArubaCloud region
zone	"ITBG-1"	Availability zone
billing_period	"Hour"	"Hour" or "Month"
vm_flavor	"CSO1A2"	CloudServer flavor
vm_image	"LU22-001"	Boot disk image (Ubuntu 22.04 LTS)
vm_disk_size_gb	20	Boot disk size in GB
ssh_cidr	"0.0.0.0/0"	CIDR for SSH — restrict in production
web_cidr	"0.0.0.0/0"	CIDR for HTTP/HTTPS — typically 0.0.0.0/0 for public sites
domain	""	Domain name for ACME HTTPS (e.g. Actalis or Let's Encrypt) (DNS must point to VM first)
certbot_email	""	Email for ACME/Certbot notifications (required with domain)

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Outputs

Output	Description
http_url	HTTP URL of the web server
https_url	HTTPS URL (only valid when domain and certificate are configured)
vm_public_ip	Public IP address of the VM
ssh_command	SSH command to connect to the VM

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Deployment Instructions

1. Clone and navigate

git clone https://github.com/arubacloud/terraform-arubacloud-examples.git
cd terraform-arubacloud-examples/nginx

2. Configure variables

cp terraform.tfvars.example terraform.tfvars

For HTTP-only deployment, only credentials and SSH key are required. For HTTPS:

domain        = "example.com"
certbot_email = "admin@example.com"

Important: The DNS A record for domain must already point to the VM's Elastic IP before you apply. To get the IP first, run terraform apply without domain, note the vm_public_ip output, set your DNS record, then re-apply with domain set.

3. Deploy

terraform init
terraform plan
terraform apply

Bootstrap takes approximately 1–2 minutes (3–5 minutes with ACME/Certbot).

4. Access the site

terraform output http_url

5. Deploy your content

ssh ubuntu@$(terraform output -raw vm_public_ip)
# Replace the default page:
sudo cp my-site/* /var/www/html/

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Customisation

Serving a second site (virtual hosting)

Create a new site config and enable it:

sudo tee /etc/nginx/sites-available/mysite.conf << 'EOF'
server {
    listen 80;
    server_name mysite.example.com;
    root /var/www/mysite;
    index index.html;
    location / { try_files $uri $uri/ =404; }
}
EOF
sudo ln -s /etc/nginx/sites-available/mysite.conf /etc/nginx/sites-enabled/
sudo nginx -t && sudo systemctl reload nginx

Reverse proxy

Replace the location / block:

location / {
    proxy_pass         http://127.0.0.1:8080;
    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;
}

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Security Recommendations

1. Restrict ssh_cidr to your management IP. SSH on 0.0.0.0/0 is acceptable for a quick start, but exposes the VM to brute-force attacks.

2. Enable HTTPS for any production site. Set domain and certbot_email to get a certificate via an ACME provider such as Actalis or Let's Encrypt. HTTP-only should only be used for internal or development sites.

3. Keep NGINX updated. Ubuntu's unattended-upgrades handles security patches automatically if enabled. Check with sudo unattended-upgrades --dry-run.

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Troubleshooting

NGINX not starting

sudo nginx -t
sudo systemctl status nginx
sudo journalctl -u nginx -n 30

ACME certificate not issued

# Check DNS propagation first:
dig +short A example.com

# Re-run certbot manually:
sudo certbot --nginx -d example.com -m admin@example.com --non-interactive --agree-tos --redirect

Common causes: DNS A record not yet propagated, port 80 blocked by web_cidr, or domain mistyped.

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References

• NGINX Documentation
• NGINX Beginner's Guide
• Certbot Documentation
• ArubaCloud Terraform Provider