mongo - 副本集增加新成员
1. 当前状态
C:\>mongo 127.0.0.1:2222
MongoDB shell version: 1.8.3
connecting to: 127.0.0.1:2222/test
neu: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 neu
Sat 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() failed
Sat 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: 127.0.0.1:2222
shell got exception during reconfig: Error: error doing query: failed
in some circumstances, the primary steps down and closes connections on a reconfig
null
Sat Dec 08 10:37:42 trying reconnect to 127.0.0.1:2222
Sat Dec 08 10:37:42 reconnect 127.0.0.1:2222 ok
4. 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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原文链接：https://blog.csdn.net/Steven_liwen/article/details/54930626
