Dashboards - Tutoriel - Exposez votre instance Dashboards dans votre réseau privé via un reverse proxy NGINX (EN)

Objective

Public Cloud Databases can be deployed over public network (internet) or private network. When using private network, you don't have access by default to monitoring tools we provide as a service, like Public Cloud Databases for Dashboards (metrics) or Opensearch (logs).

This guide explains how to expose your managed Dashboards to internet through the configuration of a NGINX instance in reverse proxy mode.

Schema concept:

Requirements

• A Public Cloud project in your OVHcloud account
• Access to the OVHcloud Control Panel
• A Dashboards running on your OVHcloud Public Cloud project. (This guide can help you to create a managed Dashboards. If you need more details on the private network configuration use this guide)

Instructions

Create a new instance in your vRack

For this tutorial, we will use an Ubuntu 22.10 image to install NGINX.

Log in to your OVHcloud Control Panel and create a new compute instance in your vRack. If you need to expose your Reverse Proxy to a public network, please select the IP Floating address option.

Install NGINX

Once you have access to your new instance, update your system and install NGINX:

sudo apt update
sudo apt full-upgrade
sudo apt install nginx

Check if your NGINX service is installed and running correctly:

sudo systemctl status nginx

Configure NGINX

Regarding the NGINX configuration we are going to follow the official Grafana documentation.

Create a configuration file in the /etc/nginx/sites-enabled/ file:

# this is required to proxy Grafana Live WebSocket connections.
map $http_upgrade $connection_upgrade {
  default upgrade;
  '' close;
}

# this is upstream grafana. You can use dns name
upstream grafana {
  server your-grafana-12345abc-12345abc.database.cloud.ovh.net:443;
}

server {
  listen 443 ssl;
  ssl_certificate /etc/nginx/ssl/your_certificate.crt;
  ssl_certificate_key /etc/nginx/ssl/your_certificate.key;

  location / {
    proxy_set_header Host $http_host;
    proxy_pass https://grafana;
  }

  # Proxy Grafana Live WebSocket connections.
  location /api/live/ {
    proxy_http_version 1.1;
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection $connection_upgrade;
    proxy_set_header Host $http_host;
    proxy_pass https://grafana;
  }
}

Be careful, replace the hostname of the Dashboards server your-grafana-12345abc-12345abc.database.cloud.ovh.net:443 by your own.

Also update the certificates and SSL key. If necessary, you can create them for testing purposes or in a non-productive environment using the following command:

sudo openssl req -x509 -nodes -days 365 -newkey rsa:2048 -keyout /etc/nginx/ssl/your_certificate.key -out /etc/nginx/ssl/your_certificate.crt

Now the NGNIX is configured in reverse proxy mode

IP Packet forwarding

To redirect traffic from your Public IP to your Private IP, uncomment the following line in /etc/sysctl.conf to enable packet forwarding for IPv4:

net.ipv4.ip_forward=1

Then force the system to reload the kernel variables:

sudo sysctl -p

Connect to your managed Dashboards

Connect to your https reverse proxy server with your browser (accept the SSL certificate if needed). You do have now access to your predefined or customized dashboards.

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