How to use Prometheus to monitor multiple hosts.

To monitor multiple hosts using Prometheus, you can follow these steps:

1. Install and configure Prometheus: To begin with, you’ll need to install and configure Prometheus on a host. You can follow the guidelines provided in the official Prometheus documentation for installation and configuration.
2. Set up target hosts: To monitor each host you need to install and configure node_exporter. Node_exporter is an exporter for Prometheus, used to expose various metrics of the host. You can find installation and configuration instructions for node_exporter in the Prometheus Github repository.
3. Configuring Prometheus targets: In the configuration file of Prometheus, you need to add information about the target hosts you want to monitor. You can define targets in the Prometheus configuration file so that Prometheus can regularly fetch metrics data from the target hosts.
4. Monitoring multiple hosts: Once the configuration is complete, Prometheus will start monitoring the target hosts you have defined. You can use Prometheus’s web interface or visualization tools like Grafana to view monitoring data and set alert rules.

In general, to monitor multiple hosts, you need to install and configure Prometheus, install node_exporter on each target host, and define the target hosts to be monitored in the Prometheus configuration file. This allows you to effectively monitor multiple hosts using Prometheus.