{ lib, config, ... }:
{
  services.pacemaker.enable = true;
  services.corosync = {
    clusterName = "zentralwerk";
    nodelist = lib.imap1 (i: hostName: {
      nodeid = i;
      name = hostName;
      ring_addrs = map (net:
        config.site.net.${net}.hosts6.dn42.${hostName}
      ) [ "cluster" "mgmt" ];
    }) (
      builtins.attrNames (
        lib.filterAttrs (_: { role, ... }: role == "server")
          config.site.hosts
      )
    );
  };
}