Mongo DB复制配置

                             Mongo DB复制配置

  1, 在主库上，启replSet模式启动一个mongod实例.

 [root@localhost bin]# ./mongod --replSet "rs0" -dbpath /data

  2,在主库上通过rs.initiate方法初始化replicat set

[root@localhost bin]# ./mongo
MongoDB shell version: 2.4.9
connecting to: test
> rs.initiate()
{
        "info2" : "no configuration explicitly specified -- making one",
        "me" : "localhost.localdomain:27017",
        "info" : "Config now saved locally.  Should come online in about a minute.",
        "ok" : 1
}

 查看当前复制状态

rs0:PRIMARY> rs.status()
{
        "set" : "rs0",
        "date" : ISODate("2015-05-06T13:37:43Z"),
        "myState" : 1,
        "members" : [
                {
                        "_id" : 0,
                        "name" : "localhost.localdomain:27017",
                        "health" : 1,
                        "state" : 1,
                        "stateStr" : "PRIMARY",
                        "uptime" : 225,
                        "optime" : Timestamp(1430919283, 1),
                        "optimeDate" : ISODate("2015-05-06T13:34:43Z"),
                        "self" : true
                }
        ],
        "ok" : 1
}

当前只有一个成员，且状态为primary

 3,在从库上以相同方式启动mongod实例

[root@localhost bin] mongod --port 27018 --replSet "rs0"  --dbpath=/b

 
4,在主库上通过rs.add方法增加备库的成员

rs0:PRIMARY> rs.add("172.28.10.145:27018")
{ "ok" : 1 }

5, 查看复制的状态

rs0:PRIMARY> rs.status()rs.status()
{
        "set" : "rs0",
        "date" : ISODate("2015-05-06T13:48:00Z"),
        "myState" : 1,
        "members" : [
                {
                        "_id" : 0,
                        "name" : "localhost.localdomain:27017",
                        "health" : 1,
                        "state" : 1,
                        "stateStr" : "PRIMARY",
                        "uptime" : 842,
                        "optime" : Timestamp(1430919658, 1),
                        "optimeDate" : ISODate("2015-05-06T13:40:58Z"),
                        "self" : true
                },
                {
                        "_id" : 1,
                        "name" : "172.28.10.145:27018",
                        "health" : 1,
                        "state" : 2,
                        "stateStr" : "SECONDARY",
                        "uptime" : 422,
                        "optime" : Timestamp(1430919658, 1),
                        "optimeDate" : ISODate("2015-05-06T13:40:58Z"),
                        "lastHeartbeat" : ISODate("2015-05-06T13:47:58Z"),
                        "lastHeartbeatRecv" : ISODate("2015-05-06T13:47:58Z"),
                        "pingMs" : 0,
                        "syncingTo" : "localhost.localdomain:27017"
                }
        ],
        "ok" : 1
}

当前一个primary和一个secondary成员.