An introduction to PuppetDB and exported resources
PuppetDB is a database service that is used to store and query information of Puppet Agents. It typically runs on the Puppet Master node, but it can also be installed on a separate database server for performance and/or security reasons.
PuppetDB consists of two key components:
A SQL database to store data
An API to query and manipulate the data
The software that provides the SQL database is called PostgreSQL, which is a popular open source database project. The PostgreSQL process listens on the TCP port 5432 for the incoming connections from the API. Although the PostgreSQL database can be accessed directly from client software, it is not recommended. Instead, the connection to PuppetDB should always be done via the API. PuppetDB API exposes the information from the SQL database to the API clients via the HTTP protocol, and it is also used by Puppet to query and store the information in the database. PuppetDB API comes with a built-in web server...
