taskserv = RookCeph {
   ceph_image = "quay.io/ceph/ceph:v18.2.4"
   rookCeph_image = "rook/ceph:master"
   nodes = [ 
      RookCephNode { name = "wuji-strg-0", devices = [ "vda3", "vda4" ] },
      RookCephNode { name =  "wuji-strg-1", devices = [ "vda3", "vda4" ] },
   ]
}