public void addPerHostServices(List<HostResource> hosts, DeployState deployState) {
        if (slobroks.isEmpty()) // TODO: Move to caller
            slobroks.addAll(createDefaultSlobrokSetup(deployState));

        if (! deployState.isHosted() || ! deployState.getProperties().applicationId().instance().isTester())
            addMetricsProxyCluster(hosts, deployState);

        for (HostResource host : hosts) {
            if (!host.getHost().runsConfigServer()) {
                addCommonServices(host, deployState);
            }
        }
    }
Adds services to all hosts in the system.
config-model/src/main/java/com/yahoo/vespa/model/admin/Admin.java