MongoDB架构篇-Replica Set 副本集-增加删除节点等
MongoDB架构篇 ReplicaSets复制（副本集）增加删除节点:
--命令解释
mongod--replSet rs1(小组) --keyFile=e:/key1(密钥) --port 20001--dbpath=F:\DingSai\Mongodb\replication\rs1\data --logpath=F:\DingSai\Mongodb\replication\rs1\logs\mongodb.log
开rs1
mongod--replSet rs1 --port 20001--dbpath=F:\DingSai\Mongodb\replication\rs1\data --logpath=F:\DingSai\Mongodb\replication\rs1\logs\mongodb.log
开rs2
mongod--replSet rs1 --port 20002--dbpath=F:\DingSai\Mongodb\replication\rs2\data --logpath=F:\DingSai\Mongodb\replication\rs2\logs\mongodb.log
开rs3
mongod--replSet rs1 --port 20003--dbpath=F:\DingSai\Mongodb\replication\rs3\data --logpath=F:\DingSai\Mongodb\replication\rs3\logs\mongodb.log
开rs4
mongod--replSet rs1 --port 20004--dbpath=F:\DingSai\Mongodb\replication\rs4\data --logpath=F:\DingSai\Mongodb\replication\rs4\logs\mongodb.log
开rs5
mongod--replSet rs1 --port 20005--dbpath=F:\DingSai\Mongodb\replication\rs5\data --logpath=F:\DingSai\Mongodb\replication\rs5\logs\mongodb.log
先打开前三台服务
登录primary3号主机 mongo localhost:20003
--编写配置清单
config_rs1={_id:"rs1",members:[{_id:0,host:"localhost:20001",priority:1},{_id:1,host:"localhost:20002",priority:2},{_id:2,host:"localhost:20003",priority:4}]}
priority优先级越大，优先级越高;3号机是主机
--初始化配置清单
rs.initiate(config_rs1);
rs.isMaster();查看当前服务器是否是主机
rs.status();查看状态
{
"_id" : 1,
"name" :"localhost:20002",
"health" : 1,
"state" : 2,
"stateStr" :"SECONDARY", --用户描述服务器状态的字符串。有SECONDARY,PRIMARY,RECOVERING等
"uptime" :1039,
"optime" :Timestamp(1422583902, 1),
"optimeDate": ISODate("2015-01-30T02:11:42Z"),
"lastHeartbeat" :ISODate("2015-01-30T02:14:42Z"), --最后心跳时间
"lastHeartbeatRecv" :ISODate("2015-01-30T02:14:42Z"),--最后心跳时间接收
"pingMs" :0, --心跳平均时间
"syncingTo" :"localhost:20003" --同步来源
},
{
"_id" : 2,
"name" :"localhost:20003",
"health" : 1,
"state" : 1,
"stateStr" :"PRIMARY",
"uptime" :1971,
"optime" :Timestamp(1422583902, 1),
"optimeDate": ISODate("2015-01-30T02:11:42Z"),
"electionTime" : Timestamp(1422583052, 1),
"electionDate" : ISODate("2015-01-30T01:57:32Z"),
"self" : true
}
],
在主服务器 priortity3服务器插入数据
db.c1.insert({name:"user1"})
db.c1.insert({name:"user2"})
db.c1.insert({name:"user3"})
secondary服务器登陆后 执行
rs.slaveOk()--需要确认有读的权限
db.c1.find();--从服务器执行slaveOk后就可以查看。
但是从服务器不能插入数据
db.c1.insert({name:"user1"})；--"errmsg": "not master"
搭建Replica Set完成。
增加普通节点设置:
开rs4
mongod--replSet rs1 --port 20004--dbpath=F:\DingSai\Mongodb\replication\rs4\data --logpath=F:\DingSai\Mongodb\replication\rs4\logs\mongodb.log
登录到
mongolocalhost:20004;
发现 4节点不存在与集群中；
登录到primary3机
rs.add("localhost:20004");--增加节点
登录到secondary4机器
rs.slaveOk();授权访问
db.c1.find();发现数据已同步过来。
关闭普通节点设置:
关闭secondary2机器
登录到primary3机器
rs.status();--发现映射关系还存在
db.c1.insert({name:"user4"})
再次开启secondary2机器
mongod--replSet rs1 --port 20002 --dbpath=F:\DingSai\Mongodb\replication\rs2\data --logpath=F:\DingSai\Mongodb\replication\rs2\logs\mongodb.log
登录到secondary2机器
db.c1.find();--发现新数据已存在(从primary主机同步过来)。
关闭primary主机：
关闭primary3节点
随便登录到一台机器
rs.slaveOk();--授权
rs.status();
{
"_id" : 0,
"name" :"localhost:20001",
"health" : 1,
"state" : 2,
"stateStr" :"SECONDARY",
"uptime" :707,
"optime" :Timestamp(1422585325, 1),
"optimeDate": ISODate("2015-01-30T02:35:25Z"),
"lastHeartbeat" : ISODate("2015-01-30T02:41:03Z"),
"lastHeartbeatRecv" : ISODate("2015-01-30T02:41:03Z"),
"pingMs" : 0,
"lastHeartbeatMessage" : "syncing to:localhost:20002",
"syncingTo" :"localhost:20002"
},
{
"_id" : 1,
"name" :"localhost:20002",
"health" : 1,
"state" : 1,
"stateStr" :"PRIMARY",--原2号机变成primary
"uptime" :308,
"optime" :Timestamp(1422585325, 1),
"optimeDate": ISODate("2015-01-30T02:35:25Z"),
"lastHeartbeat" : ISODate("2015-01-30T02:41:03Z"),
"lastHeartbeatRecv" : ISODate("2015-01-30T02:41:03Z"),
"pingMs" : 0,
"electionTime" : Timestamp(1422585613, 1),
"electionDate" : ISODate("2015-01-30T02:40:13Z")
},
{
"_id" : 2,
"name" :"localhost:20003",
"health" : 0,
"state" : 8,
"stateStr" :"(not reachable/healthy)",--原primary3号机不可达
"uptime" : 0,
"optime" :Timestamp(1422585325, 1),
"optimeDate": ISODate("2015-01-30T02:35:25Z"),
"lastHeartbeat" : ISODate("2015-01-30T02:40:57Z"),
"lastHeartbeatRecv": ISODate("2015-01-30T02:40:05Z"),
"pingMs" : 0
},
原primary3号机不可达，原secondary2号机变成primary。
mongolocalhost:20002
db.c1.insert({name:"user5"});
重新打开原primary 3号机
mongod--replSet rs1 --port 20003--dbpath=F:\DingSai\Mongodb\replication\rs3\data --logpath=F:\DingSai\Mongodb\replication\rs3\logs\mongodb.log
登录到原primary 3号机
rs.isMaster()
{
"setName" : "rs1",
"setVersion" : 2,
"ismaster" : true, --重启后又变回成primary。
"secondary" : false,
"hosts" : [
"localhost:20003",
"localhost:20004",
"localhost:20002",
"localhost:20001"
],
"primary" :"localhost:20003",
"me" :"localhost:20003",
"maxBsonObjectSize" : 16777216,
"maxMessageSizeBytes" :48000000,
"maxWriteBatchSize" : 1000,
"localTime" :ISODate("2015-01-30T02:46:45.978Z"),
"maxWireVersion" : 2,
"minWireVersion" : 0,
"ok" : 1
}
原primary3号机又成为primary, 2号机又变回 sencondary2。
总结：
1.新增的所有节点都会从primary主机中同步数据。
2.primary节点坏掉，会有次优先级的机器替代它。
3.primary节点恢复，立刻变回primary。
rs.slaveOk();--sencondary机器授权查询
rs.isMaster()--查看副本集状态
rs.status()--查看副本集状态
rs.remove("localhost:20001");--删除节点 在主服务器执行
rs.add("localhost:20001");--增加节点
rs.initiate(config_rs1);--Initializes a new replica set.
rs.reconfig(config_rs1);--Re-configures a replica set by applying a new replica set configuration object.
rs.的命令官网
http://docs.mongodb.org/manual/reference/method/js-replication/
Replica Set官网说明：
http://docs.mongodb.org/manual/core/replica-set-architecture-three-members/