MongoDB之——Replica Sets部署

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1、创建数据文件存储路径

[root@localhost ~]# mkdir -p /data/data/r0
[root@localhost ~]# mkdir -p /data/data/r1
[root@localhost ~]# mkdir -p /data/data/r2      

2、创建日志文件路径

[root@localhost ~]# mkdir -p /data/log      

3、创建主从 key 文件

创建主从 key 文件，用于标识集群的私钥的完整路径，如果各个实例的 key file 内容不一致，程序将不能正常用。

[root@localhost ~]# mkdir -p /data/key
[root@localhost ~]# echo "this is rs1 super secret key" > /data/key/r0
[root@localhost ~]# echo "this is rs1 super secret key" > /data/key/r1
[root@localhost ~]# echo "this is rs1 super secret key" > /data/key/r2
[root@localhost ~]# chmod 600 /data/key/r*      

4、启动 3 个实例

[root@localhost ~]# /Apps/mongo/bin/mongod --replSet rs1 --keyFile /data/key/r0 --fork --port 28010 --dbpath /data/data/r0 --logpath=/data/log/r0.log --logappend
all output going to: /data/log/r0.log
forked process: 6573
[root@localhost ~]# /Apps/mongo/bin/mongod --replSet rs1 --keyFile /data/key/r1 --fork --port 28011 --dbpath /data/data/r1 --logpath=/data/log/r1.log --logappend
all output going to: /data/log/r1.log
forked process: 6580
[root@localhost ~]# /Apps/mongo/bin/mongod --replSet rs1 --keyFile /data/key/r2 --fork --port 28012 --dbpath /data/data/r2 --logpath=/data/log/r2.log --logappend
all output going to: /data/log/r2.log
forked process: 6585
[root@localhost ~]#      

5、配置及初始化 Replica Sets

[root@localhost bin]# /Apps/mongo/bin/mongo -port 28010
MongoDB shell version: 1.8.1
connecting to: 127.0.0.1:28010/test
> config_rs1 = {_id: 'rs1', members: [
... {_id: 0, host: 'localhost:28010', priority:1}, --成员 IP 及端口， priority=1 指 PRIMARY
... {_id: 1, host: 'localhost:28011'},
... {_id: 2, host: 'localhost:28012'}]
... }
{
  "_id" : "rs1",
  "members" : [
    {
      "_id" : 0,
      "host" : "localhost:28010"
    },
    {
      "_id" : 1,
      "host" : "localhost:28011"
    },
    {
      "_id" : 2,
      "host" : "localhost:28012"
    }
  ]
}
> rs.initiate(config_rs1); --初始化配置
{
  "info" : "Config now saved locally. Should come online in about a minute.",
  "ok" : 1
}      

6、查看复制集状态

> rs.status()
{
  "set" : "rs1",
  "date" : ISODate("2012-05-31T09:49:57Z"),
  "myState" : 1,
  "members" : [
    {
      "_id" : 0,
      "name" : "localhost:28010",
      "health" : 1, --1 表明正常; 0 表明异常
      "state" : 1, -- 1 表明是 Primary; 2 表明是 Secondary;
      "stateStr" : "PRIMARY", --表明此机器是主库
      "optime" : {
        "t" : 1338457763000,
        "i" : 1
      },
      "optimeDate" : ISODate("2012-05-31T09:49:23Z"),
      "self" : true
    },
    {
      "_id" : 1,
      "name" : "localhost:28011",
      "health" : 1,
      "state" : 2,
      "stateStr" : "SECONDARY",
      "uptime" : 23,
      "optime" : {
        "t" : 1338457763000,
        "i" : 1
      },
      "optimeDate" : ISODate("2012-05-31T09:49:23Z"),
      "lastHeartbeat" : ISODate("2012-05-31T09:49:56Z")
    },
    {
      "_id" : 2,
      "name" : "localhost:28012",
      "health" : 1,
      "state" : 2,
      "stateStr" : "SECONDARY",
      "uptime" : 23,
      "optime" : {
        "t" : 1338457763000,
        "i" : 1
      },
      "optimeDate" : ISODate("2012-05-31T09:49:23Z"),
      "lastHeartbeat" : ISODate("2012-05-31T09:49:56Z")
    }
  ],
  "ok" : 1
}
rs1:PRIMARY>      

rs1:PRIMARY> rs.isMaster()
{
  "setName" : "rs1",
  "ismaster" : true,
  "secondary" : false,
  "hosts" : [
    "localhost:28010",
    "localhost:28012",
    "localhost:28011"
  ],
  "maxBsonObjectSize" : 16777216,
  "ok" : 1
}
rs1:PRIMARY>