Chapter 3. Proxmox under the Hood

In the previous chapter, we have seen what a Proxmox GUI looks like and also looked at its features. In this chapter, we will take a look how configuration files hold a Proxmox virtualization platform together, files to be used for advanced configuration, and how to troubleshoot a Proxmox platform. Proxmox is built on Debian Linux, which is very stable with a large active community. So, it inherited the heavy dependency on configuration of the .conf files as the primary means to store various configurations. The Proxmox GUI provides you with the ability to manage a cluster, but does not provide direct access to any configuration files. Any direct changes by advanced users have to be done through a command-line interface (CLI). Commonly used scenarios, such as adding special arguments to configuration files, take place through the CLI. In this chapter, we will cover the following topics:

• The Proxmox cluster filesystem, or pmxcfs
• The Proxmox directory...