====Prometheus====

The Prometheus output module turns your system into a web server that hosts values in a format that can be read by Prometheus.

The URL to read is **<nowiki>http://</nowiki>**//servername//<nowiki>/</nowiki>**prometheus**. \\

This is a //service// module - meaning that rather than //writing// data to another system, it opens a server to make that data available to systems that might want to read the information.

^Parameter^Default^Meaning^
|**port**||The port number to host the web server on.|

===Notes===

It is important to note that if you have //multiple// output modules that require a web server, they will share a **single** server with the port number specified by the last module in your configuration file. 

For example, if you wanted both [[Prometheus]] output on port 90 and [[REST]] output on port 9002 (in that order), your Prometheus endpoint would be available on port 9002 rather than 90. 

===Availability===

This module is only available for [[key-value|key-value]] data. 

===Example===

<code>
[
   {
       "method": "prometheus",
       "port": 82
   }
]
</code>

//The above example would make your data available via OPC-UA on port 703//

===Other Modules===

Return to the [[key-value methods|list of output modules]].