seqdiag {
    Client; NFVO; tacker-server; tacker-conductor; MgmtDriver; VnfLcmDriver;

    Client -> "tacker-server"
      [label = "POST /vnflcm/v2/vnf_instances/{vnfInstanceId}/terminate"];
    Client <-- "tacker-server" [label = "Response 202 Accepted"];
    "tacker-server" -> "tacker-conductor"
      [label = "trriger asynchronous task"];
    NFVO <- "tacker-conductor" [label = "POST /grants"];
    NFVO --> "tacker-conductor" [label = "201 Created"];
    "tacker-conductor" -> "MgmtDriver" [label = "execute MgmtDriver"];
    "tacker-conductor" <-- "MgmtDriver" [label = ""];
    "tacker-conductor" -> "VnfLcmDriver" [label = "execute VnfLcmDriver"];
    "tacker-conductor" <-- "VnfLcmDriver" [label = ""];
  }