This function is only available in CFEngine Enterprise.

Prototype: hostswithclass(class, field)

Return type: slist

Description: Returns a list from the CFEngine Database with the information field of hosts on which classs is set.

On CFEngine Enterprise, this function can be used to return a list of hostnames or ip-addresses of hosts that have a given class.

Note: This function only works locally on the hub, but allows the hub to construct custom configuration files for (classes of) hosts. Hosts are selected based on the classes set during the most recently collected agent run.

Arguments:

  • class: string, in the range: [a-zA-Z0-9_]+
  • field: one of
    • name
    • address

Example:

bundle agent debian_hosts
{
vars:

  am_policy_hub::
    "host_list" slist => hostswithclass( "debian", "name" );

files:
  am_policy_hub::
    "/tmp/master_config.cfg"
         edit_line => insert_lines("host=$(host_list)"),
            create => "true";
}

History: Was introduced in 3.3.0, Nova 2.2.0 (2012)

See also: hubknowledge(), remotescalar(), remoteclassesmatching()