gistfile1.builder

# The end result when the recipe is run is:

node[:openldap][:ldap_conf][:servers] = [ "ldap://ldap1.internal.com", "ldap://ldap2.internal.com", "ldap://server.office.com" ]

# but what I *expected* was this:

node[:openldap][:ldap_conf][:servers] = [ "ldap://server.office.com" ]

ldap.conf.rb

set[:openldap][:ldap_conf][:servers] = [
                                   "ldap://ldap1.internal.com",
                                   "ldap://ldap2.internal.com"
]

role.rb

override_attributes(

    "openldap" => {
        "ldap_conf" => {
            "servers" => [
                "!merge:",
                "ldap://server.office.com"
            ]
        }
    }
)