vi /usr/local/mongodb/conf/config.conf

40服务器配置文件
pidfilepath = /usr/local/mongodb/config/log/configsrv.pid
dbpath = /mydata/mongodb/config/data
logpath = /usr/local/mongodb/config/log/congigsrv.log
logappend = true

bind_ip = 192.168.29.40
port = 28001
fork = true   #以守护进程的方式运行MongoDB，创建服务器进程

#declare this is a config db of a cluster;
configsvr = true

#副本集名称
replSet=configs

#设置最大连接数
maxConns=20000

41服务器配置文件
pidfilepath = /usr/local/mongodb/config/log/configsrv.pid
dbpath = /mydata/mongodb/config/data
logpath = /usr/local/mongodb/config/log/congigsrv.log
logappend = true

bind_ip = 192.168.29.41
port = 28001
fork = true   #以守护进程的方式运行MongoDB，创建服务器进程

#declare this is a config db of a cluster;
configsvr = true

#副本集名称
replSet=configs

#设置最大连接数
maxConns=20000

42服务器配置文件

pidfilepath = /usr/local/mongodb/config/log/configsrv.pid
dbpath = /mydata/mongodb/config/data
logpath = /usr/local/mongodb/config/log/congigsrv.log
logappend = true

bind_ip = 192.168.29.42
port = 28001
fork = true   #以守护进程的方式运行MongoDB，创建服务器进程

#declare this is a config db of a cluster;
configsvr = true

#副本集名称
replSet=configs

#设置最大连接数
maxConns=20000

启动三台服务器的config server
mongod -f /usr/local/mongodb/conf/config.conf

登录任意一台配置服务器，初始化配置副本集
#连接
mongo --port 21000
#config变量
config = {
... _id : "configs",
... members : [
... {_id : 0, host : "192.168.1.40:28001" },
... {_id : 1, host : "192.168.1.41:28001" },
... {_id : 2, host : "192.168.1.42:28001" }
... ]
... }

#初始化副本集
rs.initiate(config)

#配置文件内容
#——————————————–
pidfilepath = /usr/local/mongodb/shard1/log/shard1.pid
dbpath = /mydata/mongodb/shard1/data
logpath = /usr/local/mongodb/shard1/log/shard1.log
logappend = true

bind_ip = 192.168.29.40
port = 28011
fork = true

#打开web监控
#httpinterface=true
#rest=true

#副本集名称
replSet=shard1

#declare this is a shard db of a cluster;
shardsvr = true

#设置最大连接数
maxConns=20000

#配置文件内容
#——————————————–
pidfilepath = /usr/local/mongodb/shard1/log/shard1.pid
dbpath = /mydata/mongodb/shard1/data
logpath = /usr/local/mongodb/shard1/log/shard1.log
logappend = true

bind_ip = 192.168.29.41
port = 28011
fork = true

#打开web监控
#httpinterface=true
#rest=true

#副本集名称
replSet=shard1

#declare this is a shard db of a cluster;
shardsvr = true

#设置最大连接数
maxConns=20000

#配置文件内容
#——————————————–
pidfilepath = /usr/local/mongodb/shard1/log/shard1.pid
dbpath = /mydata/mongodb/shard1/data
logpath = /usr/local/mongodb/shard1/log/shard1.log
logappend = true

bind_ip = 192.168.29.42
port = 28011
fork = true

#打开web监控
#httpinterface=true
#rest=true

#副本集名称
replSet=shard1

#declare this is a shard db of a cluster;
shardsvr = true

#设置最大连接数
maxConns=20000

#内容
pidfilepath = /usr/local/mongodb/mongos/log/mongos.pid
logpath = /usr/local/mongodb/mongos/log/mongos.log
logappend = true

bind_ip = 0.0.0.0
port = 28000
fork = true

#监听的配置服务器,只能有1个或者3个 configs为配置服务器的副本集名字
configdb = configs/192.168.1.40:28001,192.168.1.41:28001,192.168.1.42:28001

#设置最大连接数
maxConns=20000

目前配置服务、路由服务、分片服务、副本集服务都已经串联起来了，但我们的目的是希望插入数据，数据能够自动分片。连接在mongos上，准备让指定的数据库、指定的集合分片生效。
#指定testdb分片生效
db.runCommand( { enablesharding :"testdb"});
#指定数据库里需要分片的集合和片键
db.runCommand( { shardcollection : "testdb.table1",key : {id: 1} } )

我们设置testdb的 table1 表需要分片，根据 id 自动分片到 shard1 ，shard2，shard3 上面去。要这样设置是因为不是所有mongodb 的数据库和表 都需要分片！
测试分片配置结果
mongo  127.0.0.1:28000
#使用testdb
use  testdb;
#插入测试数据
for (var i = 1; i <= 100000; i++)
db.table1.save({id:i,"test1":"testval1"});
#查看分片情况如下，部分无关信息省掉了
db.table1.stats();

{
        "sharded" : true,
        "ns" : "testdb.table1",
        "count" : 100000,
        "numExtents" : 13,
        "size" : 5600000,
        "storageSize" : 22372352,
        "totalIndexSize" : 6213760,
        "indexSizes" : {
                "_id_" : 3335808,
                "id_1" : 2877952
        },
        "avgObjSize" : 56,
        "nindexes" : 2,
        "nchunks" : 3,
        "shards" : {
                "shard1" : {
                        "ns" : "testdb.table1",
                        "count" : 42183,
                        "size" : 0,
                        ...
                        "ok" : 1
                },
                "shard2" : {
                        "ns" : "testdb.table1",
                        "count" : 38937,
                        "size" : 2180472,
                        ...
                        "ok" : 1
                },
                "shard3" : {
                        "ns" : "testdb.table1",
                        "count" :18880,
                        "size" : 3419528,
                        ...
                        "ok" : 1
                }
        },
        "ok" : 1
}