Which class will run for the certname "webserver.mylabserver.com"?

The class that will run for the certname "webserver.mylabserver.com" is determined by the expected role or function associated with that specific server within a Puppet-managed environment. In this context, the "apache" class is commonly associated with serving web content and managing web server configurations for environments hosting websites.

When this certname is specified, Puppet evaluates its manifest files to determine which classes or resources are applicable based on the role assigned to that server. The "apache" class typically includes configurations, packages, and services relevant to an Apache web server, which is commonly used for hosting websites and web applications. This makes it fitting for a server identified as a "webserver."

In general, while options like "nginx" and "varnish" could theoretically manage web content as well, they pertain to different web server configurations. The "base" class might include general settings applicable to all servers but lacks the specificity to define the server's role as distinctively as the "apache" class does in this scenario. Therefore, based on the known function of the certname, the "apache" class is the most appropriate choice.