mongo - 副本集增加新成员

2019-11-08 20:54:52

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1. 当前状态

C:/>mongo 127.0.0.1:2222MongoDB shell version: 1.8.3connecting to: 127.0.0.1:2222/testneu:PRIMARY> rs.conf(){ "_id" : "neu", "version" : 3, "members" : [ { "_id" : 0, "host" : "ZJNO9LZF6G8LBPS:1111" }, { "_id" : 1, "host" : "ZJNO9LZF6G8LBPS:2222" }, { "_id" : 2, "host" : "ZJNO9LZF6G8LBPS:9999", "arbiterOnly" : true } ]}neu:PRIMARY> rs.status(){ "set" : "neu", "date" : ISODate("2012-12-08T02:26:33Z"), "myState" : 1, "members" : [ { "_id" : 0, "name" : "ZJNO9LZF6G8LBPS:1111", "health" : 1, "state" : 2, "stateStr" : "SECONDARY", "uptime" : 109, "optime" : { "t" : 1354852100000, "i" : 1 }, "optimeDate" : ISODate("2012-12-07T03:48:20Z"), "lastHeartbeat" : ISODate("2012-12-08T02:26:32Z") }, { "_id" : 1, "name" : "ZJNO9LZF6G8LBPS:2222", "health" : 1, "state" : 1, "stateStr" : "PRIMARY", "optime" : { "t" : 1354852100000, "i" : 1 }, "optimeDate" : ISODate("2012-12-07T03:48:20Z"), "self" : true }, { "_id" : 2, "name" : "ZJNO9LZF6G8LBPS:9999", "health" : 1, "state" : 7, "stateStr" : "ARBITER", "uptime" : 59, "optime" : { "t" : 0, "i" : 0 }, "optimeDate" : ISODate("1970-01-01T00:00:00Z"), "lastHeartbeat" : ISODate("2012-12-08T02:26:32Z") } ], "ok" : 1}

2. 在新窗口中启动mongod进程

D:/mongodb>mongod --dbpath D:/mongodb/neu-2 --port 3333 --replSet neuSat Dec 08 10:37:09 [initandlisten] MongoDB starting : pid=368 port=3333 dbpath=D:/mongodb/neu-2 32-bit

** NOTE: when using MongoDB 32 bit, you are limited to about 2 gigabytes of data** see http://blog.mongodb.org/post/137788967/32-bit-limitations** with --dur, the limit is lower

Sat Dec 08 10:37:09 [initandlisten] db version v1.8.3, pdfile version 4.5

……

3. 增加成员

neu:PRIMARY> rs.add("ZJNO9LZF6G8LBPS:3333")Sat Dec 08 10:37:42 DBClientCursor::init call() failedSat Dec 08 10:37:42 query failed : admin.$cmd { replSetReconfig: { _id: "neu", version: 4, members: [ { _id: 0, host: "ZJNO9LZF6G8LBPS:1111" }, { _id: 1, host: "ZJNO9LZF6G8LBPS:2222" }, { _id: 2, host: "ZJNO9LZF6G8LBPS:9999", arbiterOnly: true }, { _id: 3.0, host: "ZJNO9LZF6G8LBPS:3333" } ] } } to: 127.0.0.1:2222shell got exception during reconfig: Error: error doing query: failedin some circumstances, the primary steps down and closes connections on a reconfignullSat Dec 08 10:37:42 trying reconnect to 127.0.0.1:2222Sat Dec 08 10:37:42 reconnect 127.0.0.1:2222 ok4. 查看当前状态

rs.status()

新成员初始状态为"stateStr" : "(not reachable/healthy)",然后变成"stateStr" : "STARTUP2",然后变成"stateStr" : "RECOVERING",最后当数据同步成功后，状态变为"stateStr" : "SECONDARY"。

5. 副本集最新状态

neu:PRIMARY> rs.conf(){ "_id" : "neu", "version" : 4, "members" : [ { "_id" : 0, "host" : "ZJNO9LZF6G8LBPS:1111" }, { "_id" : 1, "host" : "ZJNO9LZF6G8LBPS:2222" }, { "_id" : 2, "host" : "ZJNO9LZF6G8LBPS:9999", "arbiterOnly" : true }, { "_id" : 3, "host" : "ZJNO9LZF6G8LBPS:3333" } ]}

neu:PRIMARY> rs.status(){ "set" : "neu", "date" : ISODate("2012-12-08T02:45:15Z"), "myState" : 1, "members" : [ { "_id" : 0, "name" : "ZJNO9LZF6G8LBPS:1111", "health" : 1, "state" : 2, "stateStr" : "SECONDARY", "uptime" : 451, "optime" : { "t" : 1354934262000, "i" : 1 }, "optimeDate" : ISODate("2012-12-08T02:37:42Z"), "lastHeartbeat" : ISODate("2012-12-08T02:45:14Z") }, { "_id" : 1, "name" : "ZJNO9LZF6G8LBPS:2222", "health" : 1, "state" : 1, "stateStr" : "PRIMARY", "optime" : { "t" : 1354934262000, "i" : 1 }, "optimeDate" : ISODate("2012-12-08T02:37:42Z"), "self" : true }, { "_id" : 2, "name" : "ZJNO9LZF6G8LBPS:9999", "health" : 1, "state" : 7, "stateStr" : "ARBITER", "uptime" : 451, "optime" : { "t" : 0, "i" : 0 }, "optimeDate" : ISODate("1970-01-01T00:00:00Z"), "lastHeartbeat" : ISODate("2012-12-08T02:45:14Z") }, { "_id" : 3, "name" : "ZJNO9LZF6G8LBPS:3333", "health" : 1, "state" : 2, "stateStr" : "SECONDARY", "uptime" : 445, "optime" : { "t" : 1354934262000, "i" : 1 }, "optimeDate" : ISODate("2012-12-08T02:37:42Z"), "lastHeartbeat" : ISODate("2012-12-08T02:45:14Z") } ], "ok" : 1}

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