mongodb:mongodb 3.0.3
host:
   ct6601   192.108.56.117
   ct6602   192.108.56.119
   ct6604   192.108.56.120
mongodb primary:192.108.56.117:27017
mongodb secondary:192.108.56.119:27017 , 192.108.56.120:27017

一.安裝mongodb
   #在ct6601,ct6602,ct6604上執行以下
   #mongodb.tgz檔案放在/root下
       [root@ct6601 ~]# ll mongo*
       -rwxr--r-- 1 root root 50328650 Jun 4 2015 mongodb-linux-x86_64-rhel62-3.0.3.tgz
   #解壓mongodb.tgz
       [root@ct6601 ~]# tar -xzvf mongodb-linux-x86_64-rhel62-3.0.3.tgz
   #移動解壓後的檔案到/usr/local/mongodb
       [root@ct6601 ~]# mv mongodb-linux-x86_64-rhel62-3.0.3 /usr/local/mongodb
   #設定環境變數
       [root@ct6601 ~]# echo "export PATH=\$PATH:/usr/local/mongodb/bin" >>.bash_profile
       [root@ct6601 ~]# . /root/.bash_profile
   #建立資料目錄
       [root@ct6601 ~]# mkdir /usr/local/mongodb/data

二.配置replica set
   #在ct6601上執行以下
       [root@ct6601 ~]# mongo 192.108.56.117:27017
       > conf = { _id:"db1", members:[
                              {_id:0,host:"192.108.56.117:27017"},
                              {_id:1,host:"192.108.56.119:27017"},
                              {_id:2,host:"192.108.56.120:27017"}
                       ]
                  }
       輸出:
       {
               "_id" : "db1",
               "members" : [
                       {
                               "_id" : 0,
                               "host" : "192.108.56.117:27017"
                       },
                       {
                               "_id" : 1,
                               "host" : "192.108.56.119:27017"
                       },
                       {
                               "_id" : 2,
                               "host" : "192.108.56.120:27017"
                       }
               ]
       }

       > rs.initiate(conf)
       輸出:
       { "ok" : 1 }
   #檢視配置結果
       db1:OTHER> rs.status()
       輸出:
       {
               "set" : "db1",
               "date" : ISODate("2015-12-16T04:05:20.195Z"),
               "myState" : 1,
               "members" : [
                       {
                               "_id" : 0,
                               "name" : "192.108.56.117:27017",
                               "health" : 1,
                               "state" : 1,
                               "stateStr" : "PRIMARY",
                               "uptime" : 233,
                               "optime" : Timestamp(1450238666, 1),
                               "optimeDate" : ISODate("2015-12-16T04:04:26Z"),
                               "electionTime" : Timestamp(1450238670, 1),
                               "electionDate" : ISODate("2015-12-16T04:04:30Z"),
                               "configVersion" : 1,
                               "self" : true
                       },
                       {
                               "_id" : 1,
                               "name" : "192.108.56.119:27017",
                               "health" : 1,
                               "state" : 2,
                               "stateStr" : "SECONDARY",
                               "uptime" : 53,
                               "optime" : Timestamp(1450238666, 1),
                               "optimeDate" : ISODate("2015-12-16T04:04:26Z"),
                               "lastHeartbeat" : ISODate("2015-12-16T04:05:18.995Z"),
                               "lastHeartbeatRecv" : ISODate("2015-12-16T04:05:18.994Z"),
                               "pingMs" : 6,
                               "lastHeartbeatMessage" : "could not find member to sync from",
                               "configVersion" : 1
                       },
                       {
                               "_id" : 2,
                               "name" : "192.108.56.120:27017",
                               "health" : 1,
                               "state" : 2,
                               "stateStr" : "SECONDARY",
                               "uptime" : 53,
                               "optime" : Timestamp(1450238666, 1),
                               "optimeDate" : ISODate("2015-12-16T04:04:26Z"),
                               "lastHeartbeat" : ISODate("2015-12-16T04:05:18.975Z"),
                               "lastHeartbeatRecv" : ISODate("2015-12-16T04:05:18.973Z"),
                               "pingMs" : 0,
                               "lastHeartbeatMessage" : "could not find member to sync from",
                               "configVersion" : 1
                       }
               ],
               "ok" : 1
       }

三.測試
   #測試replica set的replication功能
       [root@ct6601 ~]# mongo --port 27017
       db1:PRIMARY> use test
       輸出:switched to db test
       db1:PRIMARY> db.tb01.insert({"name":"selectshen"})
       輸出:WriteResult({ "nInserted" : 1 })
       db1:PRIMARY> db.tb01.find()
       輸出:{ "_id" : ObjectId("5670e3e22d45179620bb7a97"), "name" : "selectshen" }
       db1:PRIMARY> exit

       [root@ct6601 ~]# mongo 192.108.56.119:27017
       db1:SECONDARY> rs.slaveOk()
       db1:SECONDARY> db.tb01.find()
       輸出:{ "_id" : ObjectId("5670e3e22d45179620bb7a97"), "name" : "selectshen" }
       db1:SECONDARY> exit

   #測試replica set的failover功能
       #關閉192.108.56.117:27017的mongodb
           [root@ct6601 ~]# mongo --port 27017
           db1:PRIMARY> use admin
           db1:PRIMARY> db.shutdownServer()
           > exit

       #可以看到primary已經切換到192.108.56.120:27017
           [root@ct6601 ~]# mongo 192.108.56.119:27017
           db1:SECONDARY> rs.status()
           輸出:
           {
                   "set" : "db1",
                   "date" : ISODate("2015-12-16T04:15:28.079Z"),
                   "myState" : 2,
                   "members" : [
                           {
                                   "_id" : 0,
                                   "name" : "192.108.56.117:27017",
                                   "health" : 0,
                                   "state" : 8,
                                   "stateStr" : "(not reachable/healthy)",
                                   "uptime" : 0,
                                   "optime" : Timestamp(0, 0),
                                   "optimeDate" : ISODate("1970-01-01T00:00:00Z"),
                                   "lastHeartbeat" : ISODate("2015-12-16T04:15:27.614Z"),
                                   "lastHeartbeatRecv" : ISODate("2015-12-16T04:13:35.281Z"),
                                   "pingMs" : 0,
                                   "lastHeartbeatMessage" : "Failed attempt to connect to 192.108.56.117:27017; couldn't connect to server 192.108.56.117:27017 (192.108.56.117), connection attempt failed",
                                   "configVersion" : -1
                           },
                           {
                                   "_id" : 1,
                                   "name" : "192.108.56.119:27017",
                                   "health" : 1,
                                   "state" : 2,
                                   "stateStr" : "SECONDARY",
                                   "uptime" : 853,
                                   "optime" : Timestamp(1450238947, 2),
                                   "optimeDate" : ISODate("2015-12-16T04:09:07Z"),
                                   "configVersion" : 1,
                                   "self" : true
                           },
                           {
                                   "_id" : 2,
                                   "name" : "192.108.56.120:27017",
                                   "health" : 1,
                                   "state" : 1,
                                   "stateStr" : "PRIMARY",
                                   "uptime" : 677,
                                   "optime" : Timestamp(1450238947, 2),
                                   "optimeDate" : ISODate("2015-12-16T04:09:07Z"),
                                   "lastHeartbeat" : ISODate("2015-12-16T04:15:27.472Z"),
                                   "lastHeartbeatRecv" : ISODate("2015-12-16T04:15:27.471Z"),
                                   "pingMs" : 0,
                                   "electionTime" : Timestamp(1450239217, 1),
                                   "electionDate" : ISODate("2015-12-16T04:13:37Z"),
                                   "configVersion" : 1
                           }
                   ],
                   "ok" : 1
           }

mongodb 3.0 replica set 配置

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