Replica sets架构复制集(3)详…

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准备增加一个端口为28013的端口新节点，见代码

[root@dota ~]# mkdir -p /data/data/r3
[root@dota ~]# echo "this is rs1 super secret key" >/data/key/r3
[root@dota ~]# chmod 600 /data/key/r3
[root@dota ~]# /usr/local/mongodb/bin/mongod --replSet rs1--keyFile /data/key/r3 --fork --port 28013 --dbpath /data/data/r3--logpath=/data/log/r3.log --logappend
[root@dota ~]# forked process: 3965
all output going to: /data/log/r3.log

添加新节点到现有的replica sets中

[root@dota ~]# /usr/local/mongodb/bin/mongo --port 28010
MongoDB shell version: 2.0.4
connecting to: 127.0.0.1:28010/test
PRIMARY> rs.add("localhost:28013")
{ "ok" : 1 }

状态1，执行初始化，代码如下

PRIMARY> rs.status()
{
"set" : "rs1",
"date" : ISODate("2014-07-25T06:35:44Z"),
"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" :11420,
   "optime" :{
    "t": 1406270123000,
    "i": 1
   },
   "optimeDate": ISODate("2014-07-25T06:35:23Z"),
   "lastHeartbeat": ISODate("2014-07-25T06:35:43Z"),
   "pingMs" :0
  },
  {
   "_id" :2,
   "name" :"localhost:28012",
   "health" :1,
   "state" :2,
   "stateStr" :"SECONDARY",
   "uptime" :417,
   "optime" :{
    "t": 1406270123000,
    "i": 1
   },
   "optimeDate": ISODate("2014-07-25T06:35:23Z"),
   "lastHeartbeat": ISODate("2014-07-25T06:35:43Z"),
   "pingMs" :0
  },
  {
   "_id" :3,
   "name" :"localhost:28013",
   "health" :1,
   "state" :3,
   "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,
   "errmsg" : "initial sync need a member to be primary orsecondary to do our initialsync"
  }
],
"ok" : 1
}

上面可以看到，这个节点还不可用

状态2 这些数据同步，代码如下

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,
   "stateStr" : "RECOVERING",
   "uptime" :128,
   "optime" :{
    "t": 0,
    "i": 0
   },
   "optimeDate": ISODate("1970-01-01T00:00:00Z"),
   "lastHeartbeat": ISODate("2014-07-25T06:37:29Z"),
   "pingMs" :0,
   "errmsg" : "initialsync couldn't connect to localhost:28012"
  }
],
"ok" : 1
}

上面可以看到初始化还没有完成，新建的节点还是不能用。与28012初始化失败。

删除节点：

只需要执行

PRIMARY> rs.remove("localhost:28013")

PRIMARY> rs.remove("localhost:28014")

具体见代码如下

PRIMARY> rs.remove("localhost:28014")
Fri Jul 25 15:28:32 DBClientCursor::init call() failed
Fri Jul 25 15:28:32 query failed : admin.$cmd { replSetReconfig: {_id: "rs1", version: 4, members: [ { _id: 0, host:"localhost:28010" }, { _id: 1, host: "localhost:28011" }, { _id: 2,host: "localhost:28012" }, { _id: 3, host: "localhost:28013" } ] }} to: 127.0.0.1:28010
Fri Jul 25 15:28:32 Error: error doing query: failedshell/collection.js:151
Fri Jul 25 15:28:32 trying reconnect to 127.0.0.1:28010
Fri Jul 25 15:28:32 reconnect 127.0.0.1:28010 ok
SECONDARY> show dbs
admin (empty)
local 1.203125GB
test 0.203125GB
PRIMARY> rs.remove("localhost:28013")
Fri Jul 25 15:29:08 DBClientCursor::init call() failed
Fri Jul 25 15:29:08 query failed : admin.$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: failedshell/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

进入primary后，执行

rs.status()可看到

PRIMARY> rs.status()
{
"set" : "rs1",
"date" : ISODate("2014-07-25T07:29:36Z"),
"myState" : 1,
"syncingTo" : "localhost:28012",
"members" : [
  {
   "_id" :0,
   "name" :"localhost:28010",
   "health" :1,
   "state" :1,
   "stateStr" :"PRIMARY",
   "optime" :{
    "t": 1406273348000,
    "i": 1
   },
   "optimeDate": ISODate("2014-07-25T07:29:08Z"),
   "self" :true
  },
  {
   "_id" :1,
   "name" :"localhost:28011",
   "health" :1,
   "state" :2,
   "stateStr" :"SECONDARY",
   "uptime" :26,
   "optime" :{
    "t": 1406273348000,
    "i": 1
   },
   "optimeDate": ISODate("2014-07-25T07:29:08Z"),
   "lastHeartbeat": ISODate("2014-07-25T07:29:35Z"),
   "pingMs" :0
  },
  {
   "_id" :2,
   "name" :"localhost:28012",
   "health" :1,
   "state" :2,
   "stateStr" :"SECONDARY",
   "uptime" :26,
   "optime" :{
    "t": 1406273348000,
    "i": 1
   },
   "optimeDate": ISODate("2014-07-25T07:29:08Z"),
   "lastHeartbeat": ISODate("2014-07-25T07:29:35Z"),
   "pingMs" :0
  }
],
"ok" : 1
}
PRIMARY>

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