CFEngine health check example

gistfile1.txt

classes:

    named_is_running::
        "zone_data_is_healthy"  expression => returnszero("/usr/bin/host -t soa digitalelf.net 127.0.0.1","noshell");

reports:

    debian.named_is_running.zone_data_is_healthy::
        "Zone data is healthy";
        
processes:

    debian.bind_is_installed::
        "named"
            depends_on => { "bind_apt_get_install_bind9" },
            handle => "named_is_running",
            comment => "If bind isn't running, start it",
            classes => if_ok("named_is_running"),
            restart_class => "StartBind";

methods:

    # If quagga is started before zone data is ready then name resolution will fail.
    # Delay starting quagga until we know that zone data is healthy.
    (debian.named_is_running.zone_data_is_healthy).!dns_master::
        "quagga"        usebundle => quagga;