Replica sets架构复制集(3)详解--增减节点
添加新节点到现有的replica sets中
状态1，执行初始化，代码如下
"stateStr" : "RECOVERING",
"uptime" : 21,
"optime" : {
"t" : 0,
"i" : 0
},
"optimeDate" : ISODate("1970-01-01T00:00:00Z"),
"lastHeartbeat" : ISODate("2014-07-25T06:35:43Z"),
"pingMs" : 20,
上面可以看到，这个节点还不可用
PRIMARY> rs.status()
{
"set" : "rs1",
"date" : ISODate("2014-07-25T06:37:31Z"),
"myState" : 1,
"syncingTo" : "localhost:28012",
"members" : [
{
"_id" : 0,
"name" : "localhost:28010",
"health" : 1,
"state" : 1,
"stateStr" : "PRIMARY",
"optime" : {
"t" : 1406270123000,
"i" : 1
},
"optimeDate" : ISODate("2014-07-25T06:35:23Z"),
"self" : true
},
{
"_id" : 1,
"name" : "localhost:28011",
"health" : 1,
"state" : 2,
"stateStr" : "SECONDARY",
"uptime" : 11527,
"optime" : {
"t" : 1406270123000,
"i" : 1
},
"optimeDate" : ISODate("2014-07-25T06:35:23Z"),
"lastHeartbeat" : ISODate("2014-07-25T06:37:29Z"),
"pingMs" : 0
},
{
"_id" : 2,
"name" : "localhost:28012",
"health" : 1,
"state" : 2,
"stateStr" : "SECONDARY",
"uptime" : 524,
"optime" : {
"t" : 1406270123000,
"i" : 1
},
"optimeDate" : ISODate("2014-07-25T06:35:23Z"),
"lastHeartbeat" : ISODate("2014-07-25T06:37:29Z"),
"pingMs" : 0
},
{
"_id" : 3,
"name" : "localhost:28013",
"health" : 1,
"state" : 3,
"errmsg" : "initial sync couldn't connect to localhost:28012"
}
],
"ok" : 1
只需要执行
PRIMARY> rs.remove("localhost:28014")
PRIMARY> rs.remove("localhost:28014")
Fri Jul 25 15:28:32 DBClientCursor::init call() failed
Fri Jul 25 15:28:32 query failed : admin.$cmd { replSetReconfig: { _id: "rs1", version: 4, members: [ { _id: 0, host: "localhost:28010" }, { _id: 1, host: "localhost:28011" }, { _id: 2, host: "localhost:28012" }, { _id: 3, host: "localhost:28013" } ] } } to: 127.0.0.1:28010
Fri Jul 25 15:28:32 Error: error doing query: failed shell/collection.js:151
Fri Jul 25 15:28:32 trying reconnect to 127.0.0.1:28010
Fri Jul 25 15:28:32 reconnect 127.0.0.1:28010 ok
SECONDARY> show dbs
admin (empty)
local 1.203125GB
test 0.203125GB
PRIMARY> rs.remove("localhost:28013")
Fri Jul 25 15:29:08 DBClientCursor::init call() failed
Fri Jul 25 15:29:08 query failed : admin.$cmd { replSetReconfig: { _id: "rs1", version: 5, members: [ { _id: 0, host: "localhost:28010" }, { _id: 1, host: "localhost:28011" }, { _id: 2, host: "localhost:28012" } ] } } to: 127.0.0.1:28010
Fri Jul 25 15:29:08 Error: error doing query: failed shell/collection.js:151
Fri Jul 25 15:29:08 trying reconnect to 127.0.0.1:28010
Fri Jul 25 15:29:08 reconnect 127.0.0.1:28010 ok
rs.status()可看到