shard1:PRIMARY> rs.stepDown(); 2016-07-11T20:35:30.134+0800 I NETWORK DBClientCursor::init call() failed 2016-07-11T20:35:30.141+0800 E QUERY Error: error doing query: failed at DBQuery._exec (src/mongo/shell/query.js:83:36) at DBQuery.hasNext (src/mongo/shell/query.js:240:10) at DBCollection.findOne (src/mongo/shell/collection.js:187:19) at DB.runCommand (src/mongo/shell/db.js:58:41) at DB.adminCommand (src/mongo/shell/db.js:66:41) at Function.rs.stepDown (src/mongo/shell/utils.js:1006:15) at (shell):1:4 at src/mongo/shell/query.js:83 2016-07-11T20:35:30.144+0800 I NETWORK trying reconnect to 10.254.3.63:27017 (10.254.3.63) failed 2016-07-11T20:35:30.146+0800 I NETWORK reconnect 10.254.3.63:27017 (10.254.3.63) ok shard1:SECONDARY> |
如果不及时使用rs.remove移除旧的主库的话，mongodb运行中有一定概率会将旧的主库自动从secondary升级为primary的，所以一旦primary切换成功后，需要remove旧的primary库以防万一。
Remove执行过程如下：
[mongodb@db_m1_slave_1 ~]$ /usr/local/mongodb-linux-x86_64-3.0.3/bin/mongo 10.254.3.72:27027 MongoDB shell version: 3.0.3 connecting to: 10.254.3.72:27027/test shard1:PRIMARY> rs.remove("10.254.3.63:27017"); 2016-07-11T20:36:01.314+0800 I NETWORK DBClientCursor::init call() failed 2016-07-11T20:36:01.323+0800 E QUERY Error: error doing query: failed at DBQuery._exec (src/mongo/shell/query.js:83:36) at DBQuery.hasNext (src/mongo/shell/query.js:240:10) at DBCollection.findOne (src/mongo/shell/collection.js:187:19) at DB.runCommand (src/mongo/shell/db.js:58:41) at DB.adminCommand (src/mongo/shell/db.js:66:41) at Function.rs.remove (src/mongo/shell/utils.js:1031:23) at (shell):1:4 at src/mongo/shell/query.js:83 2016-07-11T20:36:01.326+0800 I NETWORK trying reconnect to 10.254.3.72:27027 (10.254.3.72) failed 2016-07-11T20:36:01.327+0800 I NETWORK reconnect 10.254.3.72:27027 (10.254.3.72) ok shard1:PRIMARY> shard1:PRIMARY> shard1:PRIMARY> rs.status(); { "set" : "shard1", "date" : ISODate("2016-07-11T12:36:20Z"), "myState" : 1, "members" : [ { "_id" : 0, "name" : "10.254.3.62:27017", "health" : 1, "state" : 2, "stateStr" : "SECONDARY", "uptime" : 19, "optime" : Timestamp(1468240561, 1), "optimeDate" : ISODate("2016-07-11T12:36:01Z"), "lastHeartbeat" : ISODate("2016-07-11T12:36:19Z"), "lastHeartbeatRecv" : ISODate("2016-07-11T12:36:20Z"), "pingMs" : 0, "lastHeartbeatMessage" : "syncing to: 10.254.3.72:27027", "syncingTo" : "10.254.3.72:27027" }, { "_id" : 2, "name" : "10.254.3.72:27017", "health" : 1, "state" : 7, "stateStr" : "ARBITER", "uptime" : 19, "lastHeartbeat" : ISODate("2016-07-11T12:36:19Z"), "lastHeartbeatRecv" : ISODate("2016-07-11T12:36:20Z"), "pingMs" : 0 }, { "_id" : 3, "name" : "10.254.3.72:27027", "health" : 1, "state" : 1, "stateStr" : "PRIMARY", "uptime" : 33237, "optime" : Timestamp(1468240561, 1), "optimeDate" : ISODate("2016-07-11T12:36:01Z"), "self" : true } ], "ok" : 1 } shard1:PRIMARY> |
[mongodb@db_m2_slave1 ~]$ /usr/local/mongodb-linux-x86_64-3.0.3/bin/mongo 10.254.3.72:27027 MongoDB shell version: 3.0.3 connecting to: 10.254.3.72:27027/test shard1:PRIMARY> rs.status(); { "set" : "shard1", "date" : ISODate("2016-07-11T14:13:37Z"), "myState" : 1, "members" : [ { "_id" : 0, "name" : "10.254.3.62:27017", "health" : 1, "state" : 2, "stateStr" : "SECONDARY", "uptime" : 5856, "optime" : Timestamp(1468246415, 1), "optimeDate" : ISODate("2016-07-11T14:13:35Z"), "lastHeartbeat" : ISODate("2016-07-11T14:13:36Z"), "lastHeartbeatRecv" : ISODate("1970-01-01T00:00:00Z"), "pingMs" : 4, "syncingTo" : "10.254.3.72:27027" }, { "_id" : 2, "name" : "10.254.3.72:27017", "health" : 1, "state" : 7, "stateStr" : "ARBITER", "uptime" : 5856, "lastHeartbeat" : ISODate("2016-07-11T14:13:36Z"), "lastHeartbeatRecv" : ISODate("1970-01-01T00:00:00Z"), "pingMs" : 0 }, { "_id" : 3, "name" : "10.254.3.72:27027", "health" : 1, "state" : 1, "stateStr" : "PRIMARY", "uptime" : 39074, "optime" : Timestamp(1468246415, 1), "optimeDate" : ISODate("2016-07-11T14:13:35Z"), "self" : true } ], "ok" : 1 } shard1:PRIMARY> |
参考文档地址：http://docs.mongoing.com/manual-zh/reference/configuration-options.html