[root@localhost ~]# mkdir /var/lib/{mongodb_2,mongodb_3} 

[root@localhost ~]# cat /etc/mongodb.conf |awk '{if($0 !~ /^$/ && $0 !~ /^#/) {print $0}}' //主服务器配置 
port = 27017  //监听端口 
fork = true   //后台运行 
pidfilepath = /var/run/mongodb/mongodb.pid //进程PID文件 
logpath = /var/log/mongodb/mongodb.log  //日志文件 
dbpath =/var/lib/mongodb   //db存放目录 
journal = true     //存储模式 
nohttpinterface = true   //禁用http 
directoryperdb=true    //一个数据库一个文件夹 
logappend=true     //追加方式写日志 
replSet=repmore     //集群名称，自定义 
oplogSize=1000     //oplog大小 
 
[root@localhost ~]# cat /etc/mongodb_2.conf |awk '{if($0 !~ /^$/ && $0 !~ /^#/) {print $0}}' //从服务器 
port = 27018 
fork = true 
pidfilepath = /var/run/mongodb/mongodb_2.pid 
logpath = /var/log/mongodb/mongodb_2.log 
dbpath =/var/lib/mongodb_2 
journal = true 
nohttpinterface = true 
directoryperdb=true 
logappend=true 
replSet=repmore 
oplogSize=1000 
 
[root@localhost ~]# cat /etc/mongodb_3.conf |awk '{if($0 !~ /^$/ && $0 !~ /^#/) {print $0}}' //从服务器 
port = 27019 
fork = true 
pidfilepath = /var/run/mongodb/mongodb_3.pid 
logpath = /var/log/mongodb/mongodb_3.log 
dbpath =/var/lib/mongodb_3 
journal = true 
nohttpinterface = true 
oplogSize = 1000 
directoryperdb=true 
logappend=true 
replSet=repmore 

mongod -f /etc/mongodb.conf 
mongod -f /etc/mongodb_2.conf 
mongod -f /etc/mongodb_3.conf 

> config = {_id:"repmore",members:[{_id:0,host:'127.0.0.1:27017',priority :2},{_id:1,host:'127.0.0.1:27018',priority:1},{_id:2,host:'127.0.0.1:27019',priority:1}]} 

> rs.initiate(config); 
{ 
 "info" : "Config now saved locally. Should come online in about a minute.", 
 "ok" : 1 
} 

repmore:PRIMARY> rs.status(); 
{ 
 "set" : "repmore", 
 "date" : ISODate("2013-12-16T21:01:51Z"), 
 "myState" : 2, 
 "syncingTo" : "127.0.0.1:27017", 
 "members" : [ 
  { 
   "_id" : 0, 
   "name" : "127.0.0.1:27017", 
   "health" : 1, 
   "state" : 1, 
   "stateStr" : "PRIMARY", 
   "uptime" : 33, 
   "optime" : Timestamp(1387227638, 1), 
   "optimeDate" : ISODate("2013-12-16T21:00:38Z"), 
   "lastHeartbeat" : ISODate("2013-12-16T21:01:50Z"), 
   "lastHeartbeatRecv" : ISODate("2013-12-16T21:01:50Z"), 
   "pingMs" : 0, 
   "syncingTo" : "127.0.0.1:27018" 
  }, 
  { 
   "_id" : 1, 
   "name" : "127.0.0.1:27018", 
   "health" : 1, 
   "state" : 2, 
   "stateStr" : "SECONDARY", 
   "uptime" : 1808, 
   "optime" : Timestamp(1387227638, 1), 
   "optimeDate" : ISODate("2013-12-16T21:00:38Z"), 
   "errmsg" : "syncing to: 127.0.0.1:27017", 
   "self" : true 
  }, 
  { 
   "_id" : 2, 
   "name" : "127.0.0.1:27019", 
   "health" : 1, 
   "state" : 2, 
   "stateStr" : "SECONDARY", 
   "uptime" : 1806, 
   "optime" : Timestamp(1387227638, 1), 
   "optimeDate" : ISODate("2013-12-16T21:00:38Z"), 
   "lastHeartbeat" : ISODate("2013-12-16T21:01:50Z"), 
   "lastHeartbeatRecv" : ISODate("2013-12-16T21:01:51Z"), 
   "pingMs" : 0, 
   "lastHeartbeatMessage" : "syncing to: 127.0.0.1:27018", 
   "syncingTo" : "127.0.0.1:27018" 
  } 
 ], 
 "ok" : 1 
} 

repmore:PRIMARY> show dbs; 
local 1.078125GB 
repmore:PRIMARY> use test 
switched to db test 
repmore:PRIMARY> db.test.insert({'name':'tank','phone':'12345678'}); 
repmore:PRIMARY> db.test.find(); 
{ "_id" : ObjectId("52af64549d2f9e75bc57cda7"), "name" : "tank", "phone" : "12345678" } 

[root@localhost mongodb]# mongo 127.0.0.1:27018 //连接 
MongoDB shell version: 2.4.6 
connecting to: 127.0.0.1:27018/test 
repmore:SECONDARY> show dbs; 
local 1.078125GB 
test 0.203125GB 
repmore:SECONDARY> db.test.find();  //无权限查看 
error: { "$err" : "not master and slaveOk=false", "code" : 13435 } 
repmore:SECONDARY> rs.slaveOk();  //从库开启 
repmore:SECONDARY> db.test.find();  //从库可看到主库刚插入的数据 
{ "_id" : ObjectId("52af64549d2f9e75bc57cda7"), "name" : "tank", "phone" : "12345678" } 
repmore:SECONDARY> db.test.insert({'name':'zhangying','phone':'12345678'}); //从库只读，无插入权限 
not master 

[root@localhost mongodb]# ps aux |grep mongod //查看所有的mongod 
root  16977 0.2 1.1 3153692 44464 ?  Sl 04:31 0:02 mongod -f /etc/mongodb.conf 
root  17032 0.2 1.1 3128996 43640 ?  Sl 04:31 0:02 mongod -f /etc/mongodb_2.conf 
root  17092 0.2 0.9 3127976 38324 ?  Sl 04:31 0:02 mongod -f /etc/mongodb_3.conf 
root  20400 0.0 0.0 103248 860 pts/2 S+ 04:47 0:00 grep mongod 
[root@localhost mongodb]# kill 16977 //关闭主服务器进程 
[root@localhost mongodb]# ps aux |grep mongod 
root  17032 0.2 1.1 3133124 43836 ?  Sl 04:31 0:02 mongod -f /etc/mongodb_2.conf 
root  17092 0.2 0.9 3127976 38404 ?  Sl 04:31 0:02 mongod -f /etc/mongodb_3.conf 
root  20488 0.0 0.0 103248 860 pts/2 S+ 04:47 0:00 grep mongod 

repmore:PRIMARY> show dbs; 
Tue Dec 17 04:48:02.392 DBClientCursor::init call() failed