db.serverStatus()命名执行时报无权限问题的解决方法

[root@ggnode2 ~]# mongo 10.130.170.112:27017/admin -u admin -p
MongoDB shell version: 3.2.8
Enter password:
connecting to: 10.130.170.112:27017/admin
MongoDB Enterprise >
MongoDB Enterprise > db.serverStatus()
{
  "ok" : 0,
  "errmsg" : "not authorized on admin to execute command { serverStatus: 1.0 }",
  "code" : 13
}

#授予角色权限
MongoDB Enterprise > db.grantRolesToUser( "admin" , [ { role: "root", db: "admin" } ])
MongoDB Enterprise >
#取消角色权限
MongoDB Enterprise > db.revokeRolesFromUser( "admin" , [ { role: "root", db: "admin" } ]
MongoDB Enterprise >

MongoDB Enterprise > db.serverStatus()
MongoDB shell version: 3.2.8
connecting to: 10.130.170.112:27017/admin
{
  "host" : "ggnode2",
  "advisoryHostFQDNs" : [ ],
  "version" : "3.2.8",
  "process" : "mongod",
  "pid" : NumberLong(23155),
  "uptime" : 1470624,
  "uptimeMillis" : NumberLong(1470624043),
  "uptimeEstimate" : 1415522,
  "localTime" : ISODate("2016-11-07T04:13:33.328Z"),
  "asserts" : {
    "regular" : 0,
    "warning" : 0,
    "msg" : 0,
    "user" : 62,
    "rollovers" : 0
  },
  "connections" : {
    "current" : 1,
    "available" : 818,
    "totalCreated" : NumberLong(6025)
  },
  "extra_info" : {
    "note" : "fields vary by platform",
    "heap_usage_bytes" : 60437840,
    "page_faults" : 28
  },
  "globalLock" : {
    "totalTime" : NumberLong("1470624234000"),
    "currentQueue" : {
      "total" : 0,
      "readers" : 0,
      "writers" : 0
    },
    "activeClients" : {
      "total" : 8,
      "readers" : 0,
      "writers" : 0
    }
  },
  "locks" : {
… …
    "storage" : {
      "freelist" : {
        "search" : {
          "bucketExhausted" : NumberLong(0),
          "requests" : NumberLong(0),
          "scanned" : NumberLong(0)
        }
      }
    },
    "ttl" : {
      "deletedDocuments" : NumberLong(0),
      "passes" : NumberLong(24508)
    }
  },
  "ok" : 1
}