6.1 安装
1下载最新的mongodb
目前最新的版本为：mongodb-linux-x86_64-2.4.6rc0.tgz
2 解压：
#tar -zxvf mongodb-linux-x86_64-2.4.6-rc0.tgz
3 清除本地化设置：
# export LC_ALL="C"
注意：不执行这一步，启动mongodb可能在初始化的时候会报错
4 启动mongodb之前的准备：
创建mongodb的数据库目录： #mkdir -p /mongodata/db
创建mongodb的日志文件： #mkdir /mongodata/log
#touch /mongodata/log/mongodb.log
6.2 启动：
./mongod --dbpath=/mongodata/db --logpath=/mongodata/log/mongodb.log --fork
6 .3 安装mongodb的python驱动：
#tar -zxvf mongo-python-driver-2.6.2.tar.gz
#cd mongo-python-driver-2.6.2
#python setup.py install
6.4 python连接测试
使用python脚本尝试连接数据库：
#!/usr/bin/python
import pymongo
import random
conn = pymongo.Connection("127.0.0.1",27017)
db = conn.test
db.authenticate("root","root.com")
db.user.save({'id':1,'name':'kaka','sex':'male'})
for id in range(2,10):
name = random.choice(['steve','koby','owen','tody','rony'])
sex = random.choice(['male','female'])
db.user.insert({'id':id,'name':name,'sex':sex})
content = db.user.find()
for i in content:
print i
保存为conn_mongodb.py
执行程序：
root@debian:/usr/local/mongodb/bin# python /root/conn_mongodb.py
{u'_id': ObjectId('52317dbc6e95524a10505709'), u'id': 1, u'name': u'kaka', u'sex': u'male'}
{u'_id': ObjectId('52317dbc6e95524a1050570a'), u'id': 2, u'name': u'tody', u'sex': u'male'}
{u'_id': ObjectId('52317dbc6e95524a1050570b'), u'id': 3, u'name': u'rony', u'sex': u'male'}
{u'_id': ObjectId('52317dbc6e95524a1050570c'), u'id': 4, u'name': u'owen', u'sex': u'female'}
{u'_id': ObjectId('52317dbc6e95524a1050570d'), u'id': 5, u'name': u'koby', u'sex': u'female'}
{u'_id': ObjectId('52317dbc6e95524a1050570e'), u'id': 6, u'name': u'steve', u'sex': u'male'}
{u'_id': ObjectId('52317dbc6e95524a1050570f'), u'id': 7, u'name': u'tody', u'sex': u'male'}
{u'_id': ObjectId('52317dbc6e95524a10505710'), u'id': 8, u'name': u'koby', u'sex': u'female'}
{u'_id': ObjectId('52317dbc6e95524a10505711'), u'id': 9, u'name': u'koby', u'sex': u'male'}
{u'_id': ObjectId('52317dc26e95524a16f4b4cd'), u'id': 1, u'name': u'kaka', u'sex': u'male'}
{u'_id': ObjectId('52317dc26e95524a16f4b4ce'), u'id': 2, u'name': u'owen', u'sex': u'male'}
{u'_id': ObjectId('52317dc26e95524a16f4b4cf'), u'id': 3, u'name': u'tody', u'sex': u'female'}
{u'_id': ObjectId('52317dc26e95524a16f4b4d0'), u'id': 4, u'name': u'koby', u'sex': u'female'}
{u'_id': ObjectId('52317dc26e95524a16f4b4d1'), u'id': 5, u'name': u'tody', u'sex': u'male'}
{u'_id': ObjectId('52317dc26e95524a16f4b4d2'), u'id': 6, u'name': u'tody', u'sex': u'female'}
{u'_id': ObjectId('52317dc26e95524a16f4b4d3'), u'id': 7, u'name': u'tody', u'sex': u'female'}
{u'_id': ObjectId('52317dc26e95524a16f4b4d4'), u'id': 8, u'name': u'rony', u'sex': u'female'}
{u'_id': ObjectId('52317dc26e95524a16f4b4d5'), u'id': 9, u'name': u'owen', u'sex': u'male'}
表示python连接mongodb正常。
7.1 架构
Mongodb的分片技术即Sharding架构
就是把海量数据水平扩展的集群系统，数据分表存储在Sharding的各个节点上。
Mongodb的数据分开分为chunk，每个chunk都是collection中的一段连续的数据记录，一般为200MB，超出则生成新的数据块。
7.1.1 构建Sharding需要三种角色
shard服务器(Shard Server)：Shard服务器是存储实际数据的分片，每个Shard可以是一个mongod实例，也可以是一组mongod实例构成的Replica Sets，为了实现每个Shard内部的故障自动切换，MongoDB官方建议每个Shard为一组Replica Sets。
配置服务器(Config Server)：为了将一个特定的collection存储在多个Shard中，需要为该collection指定一个Shard key，决定该条记录属于那个chunk，配置服务器可以存储以下信息：
1，所有Shard节点的配置信息
2，每个chunk的Shard key范围
3，chunk在各Shard的分布情况
4，集群中所有DB和collection的Shard配置信息
路由进程(Route Process):一个前端路由，客户端由此接入，首先询问配置服务器需要到那个Shard上查询或保存记录，然后连接相应Shard执行操作，最后将结果返回客户端。客户端只需 将原本发给mongod的查询活更新请求原封不动的发给路由器进程，而不必关心所操作的记录存储在那个Shard上。
7.1.2架构图：
7.2 切片准备：
7.2.1安装
说明：10.15.62.202 以下使用简称server1
10.15.62.202 以下使用简称server2
10.15.62.205 以下使用简称server3
1 解压mongodb重命名到/opt目录下：(server1,server2,server3均执行此操作)
#tar -zxvf mongodb-linux-x86_64-2.4.6.tgz && mv mongodb-linux-x86_64-2.4.6 /opt/mongodb && rm -rf mongodb-linux-x86_64-2.4.6.tgz
2 每台服务器中，创建日志和验证目录，创建MongoDB用户组，创建MongoDB用户同时设置所属MongoDB用户组，设置MongoDB用户密码：
#mkdir -p /opt/mongodb/log /opt/mongodb/security && groupadd mongodb && useradd -g mongodb mongodb && passwd mongodb
3 创建安全key：(server1,server2,server3均执行此操作)
#openssl rand -base64 741 > /opt/mongodb/security/mongo.key
#chmod 0600 /opt/mongodb/security/mongo.key
（不执行该命令会出现报错：644 permissions on /opt/mongodb/security/mongo.key are too open）
4 数据库程序目录结构：
root@debian:/opt/mongodb# tree /opt/mongodb/
/opt/mongodb/
├── bin
│├── bsondump
│├── mongo
│├── mongod
│├── mongodump
│├── mongoexport
│├── mongofiles
│├── mongoimport
│├── mongooplog
│├── mongoperf
│├── mongorestore
│├── mongos
│├── mongosniff
│├── mongostat
│└── mongotop
├── GNU-AGPL-3.0
├── log
├── README
├── security
│└── mongo.key
└── THIRD-PARTY-NOTICES
3 directories, 18 files
root@debian:/opt/mongodb#
7.2.2 创建数据库和日志目录：
Server1：
#mkdir -p /data/shard10001 /data/shard20001 /data/shard30001 /data/config1 && chown -R mongodb:mongodb /data/shard10001 /data/shard20001 /data/shard30001 /data/config1
Server2：
#mkdir -p /data/shard10002 /data/shard20002 /data/shard30002 /data/config2 && chown -R mongodb:mongodb /data/shard10002 /data/shard20002 /data/shard30002 /data/config2
Server3：
#mkdir -p /data/shard10003 /data/shard20003 /data/shard30003 /data/config3 && chown -R mongodb:mongodb /data/shard10003 /data/shard20003 /data/shard30003 /data/config3
7.2.3 创建mongod sharding启动文件：
Server1：
一、新建配置文件 /opt/mongodb/security/shard10001.conf 加入如下内容：
dbpath=/data/shard10001
shardsvr=true
replSet=shard1
fork = true
port=10001
oplogSize=100
logpath=/opt/mongodb/log/shard10001.log
profile=1
slowms=5
rest=true
quiet=true
keyFile=/opt/mongodb/security/mongo.key
二、新建配置文件 /opt/mongodb/security/shard20001.conf 加入如下内容：
dbpath=/data/shard20001
shardsvr=true
replSet=shard2
fork = true
port=10002
oplogSize=100
logpath=/opt/mongodb/log/shard20001.log
profile=1
slowms=5
rest=true
quiet=true
keyFile=/opt/mongodb/security/mongo.key
三、新建配置文件 /opt/mongodb/security/shard30001.conf 加入如下内容：
dbpath=/data/shard30001
shardsvr=true
replSet=shard3
fork = true
port=10003
oplogSize=100
logpath=/opt/mongodb/log/shard30001.log
profile=1
slowms=5
rest=true
quiet=true
keyFile=/opt/mongodb/security/mongo.key
四、新建配置文件/opt/mongodb/security/config1.conf加入如下内容：
dbpath=/data/config1
configsvr=true
fork = true
port=20000
oplogSize=5
logpath=/opt/mongodb/log/config1.log
quiet=true
keyFile=/opt/mongodb/security/mongo.key
五、新建配置文件/opt/mongodb/security/mongos1.conf加入如下内容：
configdb=10.15.62.202:20000,10.15.62.203:20000,10.15.62.205:20000
port=30000
fork = true
chunkSize=5
logpath=/opt/mongodb/log/mongos1.log
quiet=true
keyFile=/opt/mongodb/security/mongo.key
Server2 如下操作：
① 新建配置文件/opt/mongodb/security/shard10002.conf添加如下内容：
dbpath=/data/shard10002
shardsvr=true
replSet=shard1
fork = true
port=10001
oplogSize=100
logpath=/opt/mongodb/log/shard10002.log
profile=1
slowms=5
rest=true
quiet=true
keyFile=/opt/mongodb/security/mongo.key
② 新建配置文件/opt/mongodb/security/shard20002.conf添加如下内容：
dbpath=/data/shard20002
shardsvr=true
replSet=shard2
fork = true
port=10002
oplogSize=100
logpath=/opt/mongodb/log/shard20002.log
profile=1
slowms=5
rest=true
quiet=true
keyFile=/opt/mongodb/security/mongo.key
③ 新建配置文件 /opt/mongodb/security/shard30002.conf 添加如下内容：
dbpath=/data/shard30002
shardsvr=true
replSet=shard3
shardsvr=true
fork = true
port=10003
oplogSize=100
logpath=/opt/mongodb/log/shard30002.log
profile=1
slowms=5
rest=true
quiet=true
keyFile=/opt/mongodb/security/mongo.key
④ 新建配置文件 /opt/mongodb/security/config2.conf 添加如下内容：
dbpath=/data/config2
configsvr=true
fork = true
port=20000
oplogSize=5
logpath=/opt/mongodb/log/config2.log
quiet=true
keyFile=/opt/mongodb/security/mongo.key
⑤ 新建配置文件 /opt/mongodb/security/mongos2.conf 添加如下内容：
configdb=10.15.62.202:20000,10.15.62.203:20000,10.15.62.205:20000
port=30000
fork = true
chunkSize=5
logpath=/opt/mongodb/log/mongos1.log
quiet=true
keyFile=/opt/mongodb/security/mongo.key
Server3 如下操作：
1) 新建配置文件/opt/mongodb/security/shard10003.conf添加如下内容：
dbpath=/data/shard10003
shardsvr=true
replSet=shard1
fork = true
port=10001
oplogSize=100
logpath=/opt/mongodb/log/shard10003.log
profile=1
slowms=5
rest=true
quiet=true
keyFile=/opt/mongodb/security/mongo.key
2) 新建配置文件/opt/mongodb/security/shard20003.conf添加如下内容：
dbpath=/data/shard20003
shardsvr=true
replSet=shard2
fork = true
port=10002
oplogSize=100
logpath=/opt/mongodb/log/shard20003.log
profile=1
slowms=5
rest=true
quiet=true
keyFile=/opt/mongodb/security/mongo.key
3) 新建配置文件 /opt/mongodb/security/shard30003.conf添加如下内容：
dbpath=/data/shard30003
shardsvr=true
replSet=shard3
fork = true
port=10003
oplogSize=100
logpath=/opt/mongodb/log/shard30003.log
profile=1
slowms=5
rest=true
quiet=true
keyFile=/opt/mongodb/security/mongo.key
4) 新建配置文件 /opt/mongodb/security/config3.conf添加如下内容：
bpath=/data/config3
configsvr=true
fork = true
port=20000
oplogSize=5
logpath=/opt/mongodb/log/config3.log
quiet=true
keyFile=/opt/mongodb/security/mongo.key
5) 新建配置文件 /opt/mongodb/security/mongos3.conf 添加如下内容：
configdb=10.15.62.202:20000,10.15.62.203:20000,10.15.62.205:20000
port=30000
fork = true
chunkSize=5
logpath=/opt/mongodb/log/mongos1.log
quiet=true
keyFile=/opt/mongodb/security/mongo.key
注意：根据mongodb官方配置，在安全auth认证方面，keyFile的优先级高于使用用户和密码认证，在初始化replication set之前需要关闭认证，而且开启了keyFile认证后已经打开了认证，然后添加管理用户，然后在开启keyFile认证即可，Authentication is disabled by default. To enable authentication for a given mongod or mongos instance, use the auth and keyFile configuration settings
初始化之前先关闭keyFile
#sed -i “s/keyFile/#keyFile/”/opt/mongodb/security/*.conf
7.2.4 启动sharding服务：
l Server1：
#/opt/mongodb/bin/mongod --config=/opt/mongodb/security/shard10001.conf
#/opt/mongodb/bin/mongod --config=/opt/mongodb/security/shard20001.conf
#/opt/mongodb/bin/mongod --config=/opt/mongodb/security/shard30001.conf
l Server2：
#/opt/mongodb/bin/mongod --config=/opt/mongodb/security/shard10002.conf
#/opt/mongodb/bin/mongod --config=/opt/mongodb/security/shard20002.conf
# /opt/mongodb/bin/mongod --config=/opt/mongodb/security/shard30002.conf
l Server3：
#/opt/mongodb/bin/mongod --config=/opt/mongodb/security/shard10003.conf
#/opt/mongodb/bin/mongod --config=/opt/mongodb/security/shard20003.conf
#/opt/mongodb/bin/mongod --config=/opt/mongodb/security/shard30003.conf
7.2.5 启动config服务：
l Server1：
#/opt/mongodb/bin/mongod --config=/opt/mongodb/security/config1.conf
l Server2：
#/opt/mongodb/bin/mongod --config=/opt/mongodb/security/config2.conf
l Server3：
#/opt/mongodb/bin/mongod --config=/opt/mongodb/security/config3.conf
7.2.6启动mongos服务：
l Server1：
/opt/mongodb/bin/mongos --config=/opt/mongodb/security/mongos1.conf
l Server2：
/opt/mongodb/bin/mongos --config=/opt/mongodb/security/mongos2.conf
l Server3
/opt/mongodb/bin/mongos --config= /opt/mongodb/security/mongos3.conf
7.2.7 初始化replica set
使用mongo连接其中任意一台mongod，这里使用server1：
root@debian:~# /opt/mongodb/bin/mongo 10.15.62.202:10001/admin
MongoDB shell version: 2.4.6
connecting to: 10.15.62.202:10001/admin
> db
admin
> config={_id:"shard1",members:[{_id:0,host:"10.15.62.202:10001"},{_id:1,host:"10.15.62.203:10001"},{_id:2,host:"10.15.62.205:10001"}]}
{
"_id" : "shard1",
"members" : [
{
"_id" : 0,
"host" : "10.15.62.202:10001"
},
{
"_id" : 1,
"host" : "10.15.62.203:10001"
},
{
"_id" : 2,
"host" : "10.15.62.205:10001"
}
]
}
> rs.initiate(config)
{
"info" : "Config now saved locally. Should come online in about a minute.",
"ok" : 1
}
> rs.status()
{
"set" : "shard1",
"date" : ISODate("2013-09-24T05:12:29Z"),
"myState" : 1,
"members" : [
{
"_id" : 0,
"name" : "10.15.62.202:10001",
"health" : 1,
"state" : 1,
"stateStr" : "PRIMARY",
"uptime" : 454,
"optime" : Timestamp(1379999452, 1),
"optimeDate" : ISODate("2013-09-24T05:10:52Z"),
"self" : true
},
{
"_id" : 1,
"name" : "10.15.62.203:10001",
"health" : 1,
"state" : 2,
"stateStr" : "SECONDARY",
"uptime" : 94,
"optime" : Timestamp(1379999452, 1),
"optimeDate" : ISODate("2013-09-24T05:10:52Z"),
"lastHeartbeat" : ISODate("2013-09-24T05:12:29Z"),
"lastHeartbeatRecv" : ISODate("2013-09-24T05:12:28Z"),
"pingMs" : 0,
"syncingTo" : "10.15.62.202:10001"
},
{
"_id" : 2,
"name" : "10.15.62.205:10001",
"health" : 1,
"state" : 2,
"stateStr" : "SECONDARY",
"uptime" : 94,
"optime" : Timestamp(1379999452, 1),
"optimeDate" : ISODate("2013-09-24T05:10:52Z"),
"lastHeartbeat" : ISODate("2013-09-24T05:12:29Z"),
"lastHeartbeatRecv" : ISODate("2013-09-24T05:12:29Z"),
"pingMs" : 0,
"syncingTo" : "10.15.62.202:10001"
}
],
"ok" : 1
}
shard1:PRIMARY>
按照此方式依次添加另外的replication set 副本集：
副本二：
root@debian:~# /opt/mongodb/bin/mongo 10.15.62.202:10002/admin
MongoDB shell version: 2.4.6
connecting to: 10.15.62.202:10002/admin
> config={_id:"shard2",members:[{_id:0,host:"10.15.62.202:10002"},{_id:1,host:"10.15.62.203:10002"},{_id:2,host:"10.15.62.205:10002"}]}
{
"_id" : "shard2",
"members" : [
{
"_id" : 0,
"host" : "10.15.62.202:10002"
},
{
"_id" : 1,
"host" : "10.15.62.203:10002"
},
{
"_id" : 2,
"host" : "10.15.62.205:10002"
}
]
}
> rs.initiate(config)
{
"info" : "Config now saved locally. Should come online in about a minute.",
"ok" : 1
}
shard2:PRIMARY> rs.status()
{
"set" : "shard2",
"date" : ISODate("2013-09-24T05:30:40Z"),
"myState" : 1,
"members" : [
{
"_id" : 0,
"name" : "10.15.62.202:10002",
"health" : 1,
"state" : 1,
"stateStr" : "PRIMARY",
"uptime" : 223,
"optime" : Timestamp(1380000589, 1),
"optimeDate" : ISODate("2013-09-24T05:29:49Z"),
"self" : true
},
{
"_id" : 1,
"name" : "10.15.62.203:10002",
"health" : 1,
"state" : 2,
"stateStr" : "SECONDARY",
"uptime" : 41,
"optime" : Timestamp(1380000589, 1),
"optimeDate" : ISODate("2013-09-24T05:29:49Z"),
"lastHeartbeat" : ISODate("2013-09-24T05:30:39Z"),
"lastHeartbeatRecv" : ISODate("2013-09-24T05:30:39Z"),
"pingMs" : 0,
"syncingTo" : "10.15.62.202:10002"
},
{
"_id" : 2,
"name" : "10.15.62.205:10002",
"health" : 1,
"state" : 2,
"stateStr" : "SECONDARY",
"uptime" : 41,
"optime" : Timestamp(1380000589, 1),
"optimeDate" : ISODate("2013-09-24T05:29:49Z"),
"lastHeartbeat" : ISODate("2013-09-24T05:30:39Z"),
"lastHeartbeatRecv" : ISODate("2013-09-24T05:30:39Z"),
"pingMs" : 0,
"syncingTo" : "10.15.62.202:10002"
}
],
"ok" : 1
}
shard2:PRIMARY> exit
副本三:
root@debian:~# /opt/mongodb/bin/mongo 10.15.62.202:10003/admin
MongoDB shell version: 2.4.6
connecting to: 10.15.62.202:10003/admin
> config={_id:"shard3",members:[{_id:0,host:"10.15.62.202:10003"},{_id:1,host:"10.15.62.203:10003"},{_id:2,host:"10.15.62.205:10003"}]}
{
"_id" : "shard3",
"members" : [
{
"_id" : 0,
"host" : "10.15.62.202:10003"
},
{
"_id" : 1,
"host" : "10.15.62.203:10003"
},
{
"_id" : 2,
"host" : "10.15.62.205:10003"
}
]
}
> rs.initiate(config)
{
"info" : "Config now saved locally. Should come online in about a minute.",
"ok" : 1
}
>
shard3:PRIMARY> rs.status()
{
"set" : "shard3",
"date" : ISODate("2013-09-24T05:42:43Z"),
"myState" : 1,
"members" : [
{
"_id" : 0,
"name" : "10.15.62.202:10003",
"health" : 1,
"state" : 1,
"stateStr" : "PRIMARY",
"uptime" : 930,
"optime" : Timestamp(1380001270, 1),
"optimeDate" : ISODate("2013-09-24T05:41:10Z"),
"self" : true
},
{
"_id" : 1,
"name" : "10.15.62.203:10003",
"health" : 1,
"state" : 2,
"stateStr" : "SECONDARY",
"uptime" : 90,
"optime" : Timestamp(1380001270, 1),
"optimeDate" : ISODate("2013-09-24T05:41:10Z"),
"lastHeartbeat" : ISODate("2013-09-24T05:42:43Z"),
"lastHeartbeatRecv" : ISODate("2013-09-24T05:42:41Z"),
"pingMs" : 0,
"syncingTo" : "10.15.62.202:10003"
},
{
"_id" : 2,
"name" : "10.15.62.205:10003",
"health" : 1,
"state" : 2,
"stateStr" : "SECONDARY",
"uptime" : 90,
"optime" : Timestamp(1380001270, 1),
"optimeDate" : ISODate("2013-09-24T05:41:10Z"),
"lastHeartbeat" : ISODate("2013-09-24T05:42:43Z"),
"lastHeartbeatRecv" : ISODate("2013-09-24T05:42:41Z"),
"pingMs" : 0,
"syncingTo" : "10.15.62.202:10003"
}
],
"ok" : 1
}shard3:SECONDARY> exit
7.2.8日志查看主从选举过程：
#more /opt/mongodb/log/shard10001.log
Tue Sep 24 13:10:51.831 [conn1] replSet replSetInitiate admin command received from client
Tue Sep 24 13:10:51.852 [conn1] replSet replSetInitiate config object parses ok, 3 members specified
Tue Sep 24 13:10:52.154 [conn1] replSet replSetInitiate all members seem up
Tue Sep 24 13:10:52.154 [conn1] ******
Tue Sep 24 13:10:52.154 [conn1] creating replication oplog of size: 100MB...
Tue Sep 24 13:10:52.160 [FileAllocator] allocating new datafile /data/shard10001/local.1, filling with zeroes...
Tue Sep 24 13:10:52.160 [FileAllocator] creating directory /data/shard10001/_tmp
Tue Sep 24 13:10:52.175 [FileAllocator] done allocating datafile /data/shard10001/local.1, size: 128MB, took 0.013 secs
Tue Sep 24 13:10:52.176 [conn1] ******
Tue Sep 24 13:10:52.176 [conn1] replSet info saving a newer config version to local.system.replset
Tue Sep 24 13:10:52.178 [conn1] replSet saveConfigLocally done
Tue Sep 24 13:10:52.178 [conn1] replSet replSetInitiate config now saved locally. Should come online in about a minute.
#初始化开始
Tue Sep 24 13:10:52.178 [conn1] command admin.$cmd command: { replSetInitiate: { _id: "shard1", members: [ { _id: 0.0, host: "10.15.62.202:10001" }, { _id: 1.0, host:
"10.15.62.203:10001" }, { _id: 2.0, host: "10.15.62.205:10001" } ] } } ntoreturn:1 keyUpdates:0 locks(micros) W:29356 reslen:112 347ms
#成员检测
Tue Sep 24 13:10:55.450 [rsStart] replSet I am 10.15.62.202:10001
Tue Sep 24 13:10:55.451 [rsStart] replSet STARTUP2
Tue Sep 24 13:10:55.456 [rsHealthPoll] replSet member 10.15.62.203:10001 is up
Tue Sep 24 13:10:55.457 [rsHealthPoll] replSet member 10.15.62.205:10001 is up
Tue Sep 24 13:10:56.457 [rsSync] replSet SECONDARY
Tue Sep 24 13:10:57.469 [rsHealthPoll] replset info 10.15.62.205:10001 thinks that we are down
Tue Sep 24 13:10:57.469 [rsHealthPoll] replSet member 10.15.62.205:10001 is now in state STARTUP2
Tue Sep 24 13:10:57.470 [rsMgr] not electing self, 10.15.62.205:10001 would veto with 'I don't think 10.15.62.202:10001 is electable'
Tue Sep 24 13:11:03.473 [rsMgr] replSet info electSelf 0
Tue Sep 24 13:11:04.459 [rsMgr] replSet PRIMARY
Tue Sep 24 13:11:05.473 [rsHealthPoll] replset info 10.15.62.203:10001 thinks that we are down
Tue Sep 24 13:11:05.473 [rsHealthPoll] replSet member 10.15.62.203:10001 is now in state STARTUP2
Tue Sep 24 13:11:05.473 [rsHealthPoll] replSet member 10.15.62.205:10001 is now in state RECOVERING
Tue Sep 24 13:11:13.188 [conn7] command admin.$cmd command: { listDatabases: 1 } ntoreturn:1 keyUpdates:0 locks(micros) R:5 r:7 reslen:124 12ms
Tue Sep 24 13:11:14.146 [conn8] query local.oplog.rs query: { ts: { $gte: Timestamp 1379999452000|1 } } cursorid:1511004138438811 ntoreturn:0 ntoskip:0 nscanned:1 keyU
pdates:0 locks(micros) r:9293 nreturned:1 reslen:106 9ms
Tue Sep 24 13:11:15.233 [slaveTracking] build index local.slaves { _id: 1 }
Tue Sep 24 13:11:15.239 [slaveTracking] build index done. scanned 0 total records. 0.005 secs
#主从选举结束
Tue Sep 24 13:11:15.240 [slaveTracking] update local.slaves query: { _id: ObjectId('52411eed2f0c855af923ffb1'), config: { _id: 2, host: "10.15.62.205:10001" }, ns: "lo
cal.oplog.rs" } update: { $set: { syncedTo: Timestamp 1379999452000|1 } } nscanned:0 nupdated:1 fastmodinsert:1 keyUpdates:0 locks(micros) w:14593 14ms
Tue Sep 24 13:11:15.478 [rsHealthPoll] replSet member 10.15.62.205:10001 is now in state SECONDARY
Tue Sep 24 13:11:23.486 [rsHealthPoll] replSet member 10.15.62.203:10001 is now in state RECOVERING
Tue Sep 24 13:11:25.487 [rsHealthPoll] replSet member 10.15.62.203:10001 is now in state SECONDARY
7.3 添加数据库管理用户，开启路由功能，并且分片：
7.3.1 创建超级用户：
root@debian:~# /opt/mongodb/bin/mongo 10.15.62.202:30000/admin
MongoDB shell version: 2.4.6
connecting to: 10.15.62.202:30000/admin
mongos> db.addUser({user:"clusterAdmin",pwd:"pwd",roles:["clusterAdmin","userAdminAnyDatabase","readWriteAnyDatabase"]});
{
"user" : "clusterAdmin",
"pwd" : "6f8d1d5a17d65fd6b632cdb0cb541466",
"roles" : [
"clusterAdmin",
"userAdminAnyDatabase",
"readWriteAnyDatabase"
],
"_id" : ObjectId("52412ec4eb1bcd32b5a25ad2")
}
注意：userAdminAnyDatabase角色只能访问admin数据库，主要用于添加修改其他用户角色，无法认证通过其它数据库，且删除shard中的成员时认证通不过，这个在后面会有验证
7.3.2 开启mongo路由功能，分片
mongos> db
admin
mongos> db.runCommand({addshard:"shard1/10.15.62.202:10001,10.15.62.203:10001,10.15.62.205:10001",name:"shard1",maxsize:20480})
{ "shardAdded" : "shard1", "ok" : 1 }
mongos> db.runCommand({addshard:"shard2/10.15.62.202:10002,10.15.62.203:10002,10.15.62.205:10002",name:"shard2",maxsize:20480})
{ "shardAdded" : "shard2", "ok" : 1 }
mongos>
mongos> db.runCommand({addshard:"shard3/10.15.62.202:10003,10.15.62.203:10003,10.15.62.205:10003",name:"shard3",maxsize:20480})
{ "shardAdded" : "shard3", "ok" : 1 }
mongos>
7.3.3检查分片情况：
mongos> db.runCommand({listshards:1})
{
"shards" : [
{
"_id" : "shard1",
"host" : "shard1/10.15.62.202:10001,10.15.62.203:10001,10.15.62.205:10001"
},
{
"_id" : "shard2",
"host" : "shard2/10.15.62.202:10002,10.15.62.203:10002,10.15.62.205:10002"
},
{
"_id" : "shard3",
"host" : "shard3/10.15.62.202:10003,10.15.62.203:10003,10.15.62.205:10003"
}
],
"ok" : 1
}
可以看到3个分片信息正常
7.3.4 激活数据库分片：
> db.runCommand( { enablesharding : “<dbname>” } );
通过执行以上命令，可以让数据库跨shard，如果不执行这步，数据库只会存放在一个shard，一旦激活数据库分片，数据库中不同的collection将被存放在不同的shard上，但一个collection仍旧存放在同一个shard上，要使单个collection也分片，还需单独对collection作些操作
7.3.5 Collecton分片
要使单个collection也分片存储，需要给collection指定一个分片key，通过以下命令操作：
> db.runCommand( { shardcollection : “<namespace>”,key : <shardkeypatternobject> });
注：
a. 分片的collection系统会自动创建一个索引（也可用户提前创建好）
b. 分片的collection只能有一个在分片key上的唯一索引，其它唯一索引不被允许
