rs1:OTHER> rs.status()
{
        "operationTime" : Timestamp(1559293558, 1),
        "ok" : 0,
        "errmsg" : "Our replica set config is invalid or we are not a member of it",
        "code" : 93,
        "codeName" : "InvalidReplicaSetConfig",
        "$clusterTime" : {
                "clusterTime" : Timestamp(1559293558, 1),
                "signature" : {
                        "hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
                        "keyId" : NumberLong(0)
                }
        }
}

初始化发现不行

rs.initiate({

   _id : "rs2",

   members: [

      { _id: 0, host: "localhost:51001" },

      { _id: 1, host: "localhost:51002" },

      { _id: 2, host: "localhost:51003" }

   ]

})　

解决方案

1. 停止所有实例，使用非复制模式启动

　　重新启动，去掉--replSet参数

2. 清除复制集信息缓存数据库local

　　使用mongo shell连接到服务器，对3个实例分别执行以下命令　　

1 2	use local db.dropDatabase()

3. 停止所有实例，使用复制模式启动

　　重新启动，使用--replSet参数指定新的复制集名字

4. 初始化复制集

　　a. 使用mongo shell连接到其中一个实例，这个实例将作为新的PRIMARY

　　b. 执行rs.initiate()。不要指定参数，不然会报错。其他配置参数可以在随后使用rs.reconfig()方法来设置

       conf=rs.conf()

       conf.members[0].host='127.0.0.1:37017'

       rs.reconfig(conf)

       rs.status()

{
        "set" : "adset",
        "date" : ISODate("2020-12-21T04:24:23.654Z"),
        "myState" : 1,
        "term" : NumberLong(1),
        "heartbeatIntervalMillis" : NumberLong(2000),
        "members" : [
                {
                        "_id" : 0,
                        "name" : "127.0.0.1:37017",
                        "health" : 1,
                        "state" : 1,
                        "stateStr" : "PRIMARY",
                        "uptime" : 341,
                        "optime" : {
                                "ts" : Timestamp(1608524659, 1),
                                "t" : NumberLong(1)
                        },
                        "optimeDate" : ISODate("2020-12-21T04:24:19Z"),
                        "electionTime" : Timestamp(1608524345, 2),
                        "electionDate" : ISODate("2020-12-21T04:19:05Z"),
                        "configVersion" : 2,
                        "self" : true
                }
        ],
        "ok" : 1
}

　　c. 对每一个secondary，使用rs.add({_id:1,host:'127.0.0.1:37018',priority:1})添加到复制集

rs.status()
{
        "set" : "adset",
        "date" : ISODate("2020-12-21T04:25:23.331Z"),
        "myState" : 1,
        "term" : NumberLong(1),
        "heartbeatIntervalMillis" : NumberLong(2000),
        "members" : [
                {
                        "_id" : 0,
                        "name" : "127.0.0.1:37017",
                        "health" : 1,
                        "state" : 1,
                        "stateStr" : "PRIMARY",
                        "uptime" : 401,
                        "optime" : {
                                "ts" : Timestamp(1608524718, 1),
                                "t" : NumberLong(1)
                        },
                        "optimeDate" : ISODate("2020-12-21T04:25:18Z"),
                        "electionTime" : Timestamp(1608524345, 2),
                        "electionDate" : ISODate("2020-12-21T04:19:05Z"),
                        "configVersion" : 3,
                        "self" : true
                },
                {
                        "_id" : 1,
                        "name" : "127.0.0.1:37018",
                        "health" : 1,
                        "state" : 5,
                        "stateStr" : "STARTUP2",
                        "uptime" : 4,
                        "optime" : {
                                "ts" : Timestamp(0, 0),
                                "t" : NumberLong(-1)
                        },
                        "optimeDate" : ISODate("1970-01-01T00:00:00Z"),
                        "lastHeartbeat" : ISODate("2020-12-21T04:25:22.608Z"),
                        "lastHeartbeatRecv" : ISODate("2020-12-21T04:25:18.664Z"),
                        "pingMs" : NumberLong(0),
                        "syncingTo" : "127.0.0.1:37017",
                        "configVersion" : 3
                }
        ],
        "ok" : 1
}

 

　　d. 等待secondary同步

       e.加入选举节点rs.add({_id:2,host:'127.0.0.1:37019',priority:1,arbiterOnly:true})

 

这种方式不需要重新导入数据