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MongoDB副本集合
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#简述:副本集合(Replica Sets),是一个基于主/从复制机制的复制功能,但增加了自动故障转移和恢复特性,一个集群最多 可以支持7个服务器,并且任意节点都可以是主节点。所有的写操作都被分发到主节点,而读操作可以在任何节点上进行;
#系统环境 OS CentOS6.5 server1 192.168.3.100:27017 server1 192.168.3.100:27018 node1 192.168.3.101:27017 node2 192.168.3.102:27017
#配置副本集方法之一(自动选定某一台数据库为主数据库) #server1启动节点 mkdir /application/mongodb/database /application/mongodb/logs /application/mongodb/bin/mongod --rest --replSet fuben/192.168.3.100:27017 --port 27017 --dbpath=/application/mongodb/database --logpath=/application/mongodb/logs/mongodb.log --fork #node1启动节点 mkdir /application/mongodb/database /application/mongodb/logs /application/mongodb/bin/mongod --rest --replSet fuben/192.168.3.101:27017 --port 27017 --dbpath=/application/mongodb/database --logpath=/application/mongodb/logs/mongodb.log --fork #node2启动节点 mkdir /application/mongodb/database /application/mongodb/logs /application/mongodb/bin/mongod --rest --replSet fuben/192.168.3.102:27017 --port 27017 --dbpath=/application/mongodb/database --logpath=/application/mongodb/logs/mongodb.log --fork #server1启动仲裁节点 mkdir /application/mongodb/arb /application/mongodb/bin/mongod --rest --replSet fuben --dbpath=/application/mongodb/arb --port 27018 --logpath=/application/mongodb/logs/arb.log --fork
#Server1登陆mongo /application/mongodb/bin/mongo --port 27017 #初始化节点(server1上操作) > rs.initiate({_id:"fuben",members:[{_id:1,host:"192.168.3.100:27017"},{_id:2,host:"192.168.3.101:27017"},{_id:3,host:"192.168.3.102:27017"},{_id:4,host:"192.168.3.100:27018","arbiterOnly":true}]}); { "info" : "Config now saved locally. Should come online in about a minute.", "ok" : 1 }
#查看副本集状态 fuben:PRIMARY> rs.status() { "set" : "fuben", "date" : ISODate("2015-05-18T13:27:21Z"), "myState" : 1, "members" : [ { "_id" : 1, "name" : "192.168.3.100:27017", "health" : 1, "state" : 1, "stateStr" : "PRIMARY", #主 "uptime" : 352, "optime" : Timestamp(1431955576, 1), "optimeDate" : ISODate("2015-05-18T13:26:16Z"), "electionTime" : Timestamp(1431955587, 1), "electionDate" : ISODate("2015-05-18T13:26:27Z"), "self" : true }, { "_id" : 2, "name" : "192.168.3.101:27017", "health" : 1, "state" : 2, "stateStr" : "SECONDARY", #从 "uptime" : 64, "optime" : Timestamp(1431955576, 1), "optimeDate" : ISODate("2015-05-18T13:26:16Z"), "lastHeartbeat" : ISODate("2015-05-18T13:27:21Z"), "lastHeartbeatRecv" : ISODate("2015-05-18T13:27:20Z"), "pingMs" : 0, "syncingTo" : "192.168.3.100:27017" }, { "_id" : 3, "name" : "192.168.3.102:27017", "health" : 1, "state" : 2, "stateStr" : "SECONDARY", #从 "uptime" : 62, "optime" : Timestamp(1431955576, 1), "optimeDate" : ISODate("2015-05-18T13:26:16Z"), "lastHeartbeat" : ISODate("2015-05-18T13:27:21Z"), "lastHeartbeatRecv" : ISODate("2015-05-18T13:27:21Z"), "pingMs" : 0, "syncingTo" : "192.168.3.100:27017" }, { "_id" : 4, "name" : "192.168.3.100:27018", "health" : 1, "state" : 7, "stateStr" : "ARBITER", #仲裁 "uptime" : 62, "lastHeartbeat" : ISODate("2015-05-18T13:27:21Z"), "lastHeartbeatRecv" : ISODate("2015-05-18T13:27:21Z"), "pingMs" : 0 } ], "ok" : 1 }
#在PRIMARY上面操作,建库建表,从数据库只有读的权限 fuben:PRIMARY> show dbs; local 1.078125GB fuben:PRIMARY> use testdb; switched to db testsb fuben:PRIMARY> db.document01.insert({"name":"wsq","sex":"M","age":"20"}); fuben:PRIMARY> show tables; document01 system.indexes fuben:PRIMARY> db.document01.find(); { "_id" : ObjectId("5511551aa51f85ff07b6df0c"), "name" : "wsq", "sex" : "M", "age" : "20" } #node1登陆mongo /application/mongodb/bin/mongo --port 27017 #设置从库可读(从库上执行) fuben:SECONDARY> show dbs; local 1.078125GB testdb 0.203125GB fuben:SECONDARY> use testdb; switched to db testdb fuben:SECONDARY> show tables; Tue Mar 24 19:53:32.513 error: { "$err" : "not master and slaveOk=false", "code" : 13435 } at src/mongo/shell/query.js:128 #因为没有读的权限 fuben:SECONDARY> rs.slaveOk(); #如果不执行该步骤从库上不可读数据 fuben:SECONDARY> show tables; document01 system.indexes fuben:SECONDARY> db.document01.find(); { "_id" : ObjectId("5511551aa51f85ff07b6df0c"), "name" : "wsq", "sex" : "M", "age" : "20" }
#配置副本集方法之二(手动选定某一台数据库为主数据库) #server1启动节点 mkdir -p /mongodb/data/db /mongodb/data/logs mongod --rest --replSet fuben/192.168.3.171:27017 --master --port 27017 --dbpath=/mongodb/data/db --logpath=/mongodb/data/logs/mongodb.log --fork #node1启动节点 mkdir -p /mongodb/data/db /mongodb/data/logs mongod --rest --replSet fuben/192.168.3.204:27017 --port 27017 --dbpath=/mongodb/data/db --logpath=/mongodb/data/logs/mongodb.log --fork #node2启动节点 mkdir -p /mongodb/data/db /mongodb/data/logs mongod --rest --replSet fuben/192.168.3.108:27017 --port 27017 --dbpath=/mongodb/data/db --logpath=/mongodb/data/logs/mongodb.log --fork
#初始化节点:(登陆其中任何一个节点操作皆可) [root@server1 /]# mongo --port 27017 MongoDB shell version: 2.4.12 connecting to: 127.0.0.1:27017/test > rs.initiate({_id:"fuben",members:[{_id:1,host:"192.168.3.171:27017",priority:2},{_id:2,host:"192.168.3.204:27017",priority:3},{_id:3,host:"192.168.3.108:27017",priority:4}]}); { "info" : "Config now saved locally. Should come online in about a minute.", "ok" : 1 } #priority 是设置优先级的,默认优先级为1,可以是1-1000的数字
#验证 fuben:PRIMARY> rs.status(); { "set" : "fuben", "date" : ISODate("2015-03-24T12:12:14Z"), "myState" : 1, "members" : [ { "_id" : 1, "name" : "192.168.10.171:27017", "health" : 1, "state" : 2, "stateStr" : "SECONDARY", #从 "uptime" : 195, "optime" : Timestamp(1427198934, 1), "optimeDate" : ISODate("2015-03-24T12:08:54Z"), "lastHeartbeat" : ISODate("2015-03-24T12:12:13Z"), "lastHeartbeatRecv" : ISODate("2015-03-24T12:12:13Z"), "pingMs" : 0, "syncingTo" : "192.168.10.108:27017" }, { "_id" : 2, "name" : "192.168.10.204:27017", "health" : 1, "state" : 2, "stateStr" : "SECONDARY", #从 "uptime" : 195, "optime" : Timestamp(1427198934, 1), "optimeDate" : ISODate("2015-03-24T12:08:54Z"), "lastHeartbeat" : ISODate("2015-03-24T12:12:13Z"), "lastHeartbeatRecv" : ISODate("2015-03-24T12:12:13Z"), "pingMs" : 0, "syncingTo" : "192.168.10.171:27017" }, { "_id" : 3, "name" : "192.168.10.108:27017", "health" : 1, "state" : 1, "stateStr" : "PRIMARY", #主 "uptime" : 498, "optime" : Timestamp(1427198934, 1), "optimeDate" : ISODate("2015-03-24T12:08:54Z"), "self" : true } ], "ok" : 1 }
#查看当前主库 fuben:SECONDARY> rs.isMaster(); { "setName" : "fuben", "setVersion" : 1, "ismaster" : false, "secondary" : true, "hosts" : [ "192.168.3.102:27017", "192.168.3.101:27017", "192.168.3.100:27017" ], "arbiters" : [ "192.168.3.100:27018" ], "primary" : "192.168.3.100:27017", "me" : "192.168.3.102:27017", "maxBsonObjectSize" : 16777216, "maxMessageSizeBytes" : 48000000, "maxWriteBatchSize" : 1000, "localTime" : ISODate("2015-05-18T13:36:41.854Z"), "maxWireVersion" : 2, "minWireVersion" : 0, "ok" : 1 }
本文出自 “吴善强” 博客,请务必保留此出处http://shanqiangwu.blog.51cto.com/8067564/1653968
MongoDB副本集合
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本文系统来源:http://shanqiangwu.blog.51cto.com/8067564/1653968
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