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mongodb副本集

零月

发布于 2018-04-25 07:52:19

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代码可运行

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代码可运行

机器	ip
node01（master）	71
node02（slave）	72
node03（slave）	73

3台机器分别安装mongodb
编辑三台机器的配置文件

 # vim /etc/mongod.conf 
replication:
  oplogSizeMB: 20
  replSetName: alextest
在master上面操作
[root@node01 ~]# mongo
MongoDB shell version: 3.0.7
connecting to: test
Server has startup warnings: 
2017-06-20T02:33:02.858+0800 I CONTROL  [initandlisten] ** WARNING: You are running this process as the root user, which is not recommended.
2017-06-20T02:33:02.858+0800 I CONTROL  [initandlisten] 
> use admin
switched to db admin
> config={_id:"alextest",members:[{_id:0,host:"192.168.6.71:27017"},{_id:1,host:"192.168.6.72:27017"},{_id:2,host:"192.168.6.73:27017"}]}
{
  "_id" : "alextest",
  "members" : [
  {
  "_id" : 0,
  "host" : "192.168.6.71:27017"
  },
  {
  "_id" : 1,
  "host" : "192.168.6.72:27017"
  },
  {
  "_id" : 2,
  "host" : "192.168.6.73:27017"
  }
  ]
}
> rs.initiate(config)
{ "ok" : 1 }
alextest:OTHER> rs.status()
{
  "set" : "alextest",
  "date" : ISODate("2017-06-19T18:36:53.118Z"),
  "myState" : 1,
  "members" : [
  {
  "_id" : 0,
  "name" : "192.168.6.71:27017",
  "health" : 1,
  "state" : 1,
  "stateStr" : "PRIMARY",
  "uptime" : 231,
  "optime" : Timestamp(1497897400, 1),
  "optimeDate" : ISODate("2017-06-19T18:36:40Z"),
  "electionTime" : Timestamp(1497897402, 1),
  "electionDate" : ISODate("2017-06-19T18:36:42Z"),
  "configVersion" : 1,
  "self" : true
  },
  {
  "_id" : 1,
  "name" : "192.168.6.72:27017",
  "health" : 1,
  "state" : 2,
  "stateStr" : "SECONDARY",
  "uptime" : 13,
  "optime" : Timestamp(1497897400, 1),
  "optimeDate" : ISODate("2017-06-19T18:36:40Z"),
  "lastHeartbeat" : ISODate("2017-06-19T18:36:52.030Z"),
  "lastHeartbeatRecv" : ISODate("2017-06-19T18:36:52.029Z"),
  "pingMs" : 1,
  "configVersion" : 1
  },
  {
  "_id" : 2,
  "name" : "192.168.6.73:27017",
  "health" : 1,
  "state" : 2,
  "stateStr" : "SECONDARY",
  "uptime" : 13,
  "optime" : Timestamp(1497897400, 1),
  "optimeDate" : ISODate("2017-06-19T18:36:40Z"),
  "lastHeartbeat" : ISODate("2017-06-19T18:36:52.017Z"),
  "lastHeartbeatRecv" : ISODate("2017-06-19T18:36:52.026Z"),
  "pingMs" : 0,
  "configVersion" : 1
  }
  ],
  "ok" : 1
}
alextest:PRIMARY> 
[root@node02 ~]# mongo
MongoDB shell version: 3.0.7
connecting to: test
Server has startup warnings: 
2017-06-20T08:24:00.437+0800 I CONTROL  [initandlisten] ** WARNING: You are running this process as the root user, which is not recommended.
2017-06-20T08:24:00.437+0800 I CONTROL  [initandlisten] 
alextest:SECONDARY> 
[root@node03 ~]# mongo
MongoDB shell version: 3.0.7
connecting to: test
Server has startup warnings: 
2017-06-20T08:24:20.049+0800 I CONTROL  [initandlisten] ** WARNING: You are running this process as the root user, which is not recommended.
2017-06-20T08:24:20.049+0800 I CONTROL  [initandlisten] 
alextest:SECONDARY> 
· 测试mongodb副本集
node01主
alextest:PRIMARY> use mydb
switched to db mydb
alextest:PRIMARY> show dbs
admin  0.078GB
alex   0.078GB
local  0.078GB
alextest:PRIMARY> db.C
db.changeUserPassword(  db.constructor          db.createUser(
db.cloneCollection(     db.copyDatabase(        db.currentOP(
db.cloneDatabase(       db.createCollection(    db.currentOp(
db.commandHelp(         db.createRole(
alextest:PRIMARY> db.createCollection('testc')
{ "ok" : 1 }
alextest:PRIMARY> show dbs
admin  0.078GB
alex   0.078GB
local  0.078GB
mydb   0.078GB
node02 从
alextest:SECONDARY> rs.slaveOk()
alextest:SECONDARY> show dbs
admin  0.078GB
alex   0.078GB
local  0.078GB
mydb   0.078GB
alextest:SECONDARY> use mydb
switched to db mydb
alextest:SECONDARY> show tables
system.indexes
testc
master上面操作
alextest:PRIMARY> cfg = rs.conf()
{
  "_id" : "alextest",
  "version" : 1,
  "members" : [
  {
  "_id" : 0,
  "host" : "192.168.6.71:27017",
  "arbiterOnly" : false,
  "buildIndexes" : true,
  "hidden" : false,
  "priority" : 1,
  "tags" : {
  },
  "slaveDelay" : 0,
  "votes" : 1
  },
  {
  "_id" : 1,
  "host" : "192.168.6.72:27017",
  "arbiterOnly" : false,
  "buildIndexes" : true,
  "hidden" : false,
  "priority" : 1,
  "tags" : {
  },
  "slaveDelay" : 0,
  "votes" : 1
  },
  {
  "_id" : 2,
  "host" : "192.168.6.73:27017",
  "arbiterOnly" : false,
  "buildIndexes" : true,
  "hidden" : false,
  "priority" : 1,
  "tags" : {
  },
  "slaveDelay" : 0,
  "votes" : 1
  }
  ],
  "settings" : {
  "chainingAllowed" : true,
  "heartbeatTimeoutSecs" : 10,
  "getLastErrorModes" : {
  },
  "getLastErrorDefaults" : {
  "w" : 1,
  "wtimeout" : 0
  }
  }
}
alextest:PRIMARY> cfg.members[0].priority = 3
3
alextest:PRIMARY> cfg.members[1].priority = 2
2
alextest:PRIMARY> cfg.members[2].priority = 1
1
alextest:PRIMARY> rs.reconfig(cfg)
{ "ok" : 1 }
alextest:PRIMARY> rs.config()
{
  "_id" : "alextest",
  "version" : 2,
  "members" : [
  {
  "_id" : 0,
  "host" : "192.168.6.71:27017",
  "arbiterOnly" : false,
  "buildIndexes" : true,
  "hidden" : false,
  "priority" : 3,
  "tags" : {
  },
  "slaveDelay" : 0,
  "votes" : 1
  },
  {
  "_id" : 1,
  "host" : "192.168.6.72:27017",
  "arbiterOnly" : false,
  "buildIndexes" : true,
  "hidden" : false,
  "priority" : 2,
  "tags" : {
  },
  "slaveDelay" : 0,
  "votes" : 1
  },
  {
  "_id" : 2,
  "host" : "192.168.6.73:27017",
  "arbiterOnly" : false,
  "buildIndexes" : true,
  "hidden" : false,
  "priority" : 1,
  "tags" : {
  },
  "slaveDelay" : 0,
  "votes" : 1
  }
  ],
  "settings" : {
  "chainingAllowed" : true,
  "heartbeatTimeoutSecs" : 10,
  "getLastErrorModes" : {
  },
  "getLastErrorDefaults" : {
  "w" : 1,
  "wtimeout" : 0
  }
  }
}
alextest:PRIMARY> 
现在master挂了可以自动切换了 node02的slave变master