标签:
MongoDB-Sharding部署方案
一、 部署环境
二、 部署方案
方案目标是搭建两个shard(shard1和shard2)实现数据分片,每个shard分别由一个副本集(一主两从一仲裁)组成。Amongoshard01主机开启27017和30000端口作为shard11和mongos实例端口;Amongoshard02开启27017、27018、27019和30000端口作为shard12、shard13、config和mongos实例端口;Amongoshard03主机开启27017和30000端口作为shard21和mongos实例端口;Amongoshard04开启27017、27018、27019和30000端口作为shard22、shard23、config和mongos实例端口;Amongoshard05开启端口27017、27018、27019作为shard14、shard24和config实例端口。
Shard11(主写操作:priority为2)、shard12(从读操作:priority为1)、shard13(仲裁)和shard14(从备份:priority为0)组成一个副本集shard1作为一个分片shard1;shard21(主写操作:priority为2)、shard22(从读操作:priority为1)、shard23(仲裁)和shard24(从备份:priority为0)组成另一个副本集shard2作为另一个分片shard2。实例部署如下:
1)Amongoshard01上:
Shard11:10.212.74.43:27017
Mongos :10.212.74.43:30000
2)Amongoshard02上:
Shard12: 10.212.84.4:27017
Shard13: 10.212.84.4:27018
Config: 10.212.84.4:27019
Mongos: 10.212.84.4:30000
3)Amongoshard03上:
Shard21:10.212.98.23:27017
Mongos :10.212.98.23:30000
4)Amongoshard04上:
Shard22:10.212.46.5:27017
Shard23: 10.212.46.5:27018
Config: 10.212.46.5:27019
Mongos: 10.212.46.5:30000
5)Amongoshard05上:
Shard14:10.212.70.21:27017
Shard24:10.212.70.21:27018
Config:10.212.70.21:27019
总概况如下图所示:
该部署方案可实现数据的读写分离和备份容灾。Config放在不同主机上或者独立,仲裁机和从机放在一起或独立,无论哪台主机当机均能提供服务。
三、 部署实现
Amongoshard01(10.212.74.43 ):
--#cd /opt/software
--#tar -zxvf mongodb-linux-x86_64-rhel62-3.0.2.tgz
--#mv mongodb-linux-x86_64-rhel62-3.0.2 /opt/mongodb3.2
--#useradd mongodb
--#chmod -R mongodb.mongodb /data/mongodb
--#su - mongodb
--$mkdir -p /data/mongodb/data/shard11
Amongoshard02(10.212.84.4 ):
--#cd /opt/software
--#tar -zxvf mongodb-linux-x86_64-rhel62-3.0.2.tgz
--#mv mongodb-linux-x86_64-rhel62-3.0.2 /opt/mongodb3.2
--#useradd mongodb
--#chmod -R mongodb.mongodb /data/mongodb
--#su - mongodb
--$mkdir -p /data/mongodb/data/shard12
--$mkdir -p /data/mongodb/data/shard13
--$mkdir -p /data/mongodb/data/config
Amongoshard03(10.212.98.23 ):
--#cd /opt/software
--#tar -zxvf mongodb-linux-x86_64-rhel62-3.0.2.tgz
--#mv mongodb-linux-x86_64-rhel62-3.0.2 /opt/mongodb3.2
--#useradd mongodb
--#chmod -R mongodb.mongodb /data/mongodb
--#su - mongodb
--$mkdir -p /data/mongodb/data/shard21
Amongoshard04(10.212.46.5 ):
--#cd /opt/software
--#tar -zxvf mongodb-linux-x86_64-rhel62-3.0.2.tgz
--#mv mongodb-linux-x86_64-rhel62-3.0.2 /opt/mongodb3.2
--#useradd mongodb
--#chmod -R mongodb.mongodb /data/mongodb
--#su - mongodb
--$mkdir -p /data/mongodb/data/shard22
--$mkdir -p /data/mongodb/data/shard23
--$mkdir -p /data/mongodb/data/config
Amongoshard05(10.212.70.21 ):
--#cd /opt/software
--#tar -zxvf mongodb-linux-x86_64-rhel62-3.0.2.tgz
--#mv mongodb-linux-x86_64-rhel62-3.0.2 /opt/mongodb3.2
--#useradd mongodb
--#chmod -R mongodb.mongodb /data/mongodb
--#su - mongodb
--$mkdir -p /data/mongodb/data/shard14
--$mkdir -p /data/mongodb/data/shard24
--$mkdir -p /data/mongodb/data/config
2.mongodb的配置:
Amongoshard01(10.212.74.43 ):
--$vi shard11.conf
shardsvr = true
replSet = shard1
port = 27017
dbpath = /data/mongodb/data/shard11
oplogSize = 100
logpath = /data/mongodb/data/shard11.log
logappend = true
maxConns = 10000
pidfilepath = /data/mongodb/data/shard11.pid
bind_ip = 10.212.74.43
rest = true
fork = true
noprealloc = true
directoryperdb = true
Amongoshard02(10.212.84.4 ):
--$vi shard12.conf
shardsvr = true
replSet = shard1
port = 27017
dbpath = /data/mongodb/data/shard12
oplogSize = 100
logpath = /data/mongodb/data/shard12.log
logappend = true
maxConns = 10000
pidfilepath = /data/mongodb/data/shard12.pid
bind_ip = 10.212.84.4
rest = true
fork = true
noprealloc = true
directoryperdb = true
--$vi shard13.conf
shardsvr = true
replSet = shard1
port = 27018
dbpath = /data/mongodb/data/shard13
oplogSize = 100
logpath = /data/mongodb/data/shard13.log
logappend = true
maxConns = 10000
pidfilepath = /data/mongodb/data/shard13.pid
bind_ip = 10.212.84.4
rest = true
fork = true
noprealloc = true
directoryperdb = true
--$vi configsvr.conf
dbpath = /data/mongodb/data/config
logpath = /data/mongodb/data/config.log
logappend = true
bind_ip = 10.212.84.4
port = 27019
fork = true
Amongoshard03(10.212.98.23 ):
--$vi shard21.conf
shardsvr = true
replSet = shard2
port = 27017
dbpath = /data/mongodb/data/shard21
oplogSize = 100
logpath = /data/mongodb/data/shard21.log
logappend = true
maxConns = 10000
pidfilepath = /data/mongodb/data/shard21.pid
bind_ip = 10.212.98.23
rest = true
fork = true
noprealloc = true
directoryperdb = true
Amongoshard04(10.212.46.5 ):
--$vi shard22.conf
shardsvr = true
replSet = shard2
port = 27017
dbpath = /data/mongodb/data/shard22
oplogSize = 100
logpath = /data/mongodb/data/shard22.log
logappend = true
maxConns = 10000
pidfilepath = /data/mongodb/data/shard22.pid
bind_ip = 10.212.46.5
rest = true
fork = true
noprealloc = true
directoryperdb = true
--$vi shard23.conf
shardsvr = true
replSet = shard2
port = 27018
dbpath = /data/mongodb/data/shard23
oplogSize = 100
logpath = /data/mongodb/data/shard23.log
logappend = true
maxConns = 10000
pidfilepath = /data/mongodb/data/shard23.pid
bind_ip = 10.212.46.5
rest = true
fork = true
noprealloc = true
directoryperdb = true
--$vi configsvr.conf
dbpath = /data/mongodb/data/config
logpath = /data/mongodb/data/config.log
logappend = true
bind_ip = 10.212.46.5
port = 27019
fork = true
Amongoshard05(10.212.70.21 ):
--$vi shard14.conf
shardsvr = true
replSet = shard1
port = 27017
dbpath = /data/mongodb/data/shard14
oplogSize = 100
logpath = /data/mongodb/data/shard14.log
logappend = true
maxConns = 10000
pidfilepath = /data/mongodb/data/shard14.pid
bind_ip = 10.212.70.21
rest = true
fork = true
noprealloc = true
directoryperdb = true
--$vi shard24.conf
shardsvr = true
replSet = shard2
port = 27018
dbpath = /data/mongodb/data/shard24
oplogSize = 100
logpath = /data/mongodb/data/shard24.log
logappend = true
maxConns = 10000
pidfilepath = /data/mongodb/data/shard24.pid
bind_ip = 10.212.70.21
rest = true
fork = true
noprealloc = true
directoryperdb = true
--$vi configsvr.conf
dbpath = /data/mongodb/data/config
logpath = /data/mongodb/data/config.log
logappend = true
bind_ip = 10.212.70.21
port = 27019
fork = true
3.mongodb的启动:
Amongoshard01(10.212.74.43 ):
--$cd /data/mongodb/bin
--./mongod -shardsvr -f /data/mongodb/data/shard11.conf
--./mongos -configdb 10.212.84.4:27019,10.212.46.5:27019,10.212.70.21:27019 -port 30000 -chunkSize 5 -logpath /data/mongodb/data/mongos.log -logappend -fork
Amongoshard02(10.212.84.4 ):
--$cd /data/mongodb/bin
--./mongod -shardsvr -f /data/mongodb/data/shard12.conf
--./mongod -shardsvr -f /data/mongodb/data/shard13.conf
--./mongod -configsvr -f /data/mongodb/data/config.conf
--./mongos -configdb 10.212.84.4:27019,10.212.46.5:27019,10.212.70.21:27019 -port 30000 -chunkSize 5 -logpath /data/mongodb/data/mongos.log -logappend -fork
Amongoshard03(10.212.98.23 ):
--$cd /data/mongodb/bin
--./mongod -shardsvr -f /data/mongodb/data/shard21.conf
--./mongos -configdb 10.212.84.4:27019,10.212.46.5:27019,10.212.70.21:27019 -port 30000 -chunkSize 5 -logpath /data/mongodb/data/mongos.log -logappend -fork
Amongoshard04(10.212.46.5 ):
--$cd /data/mongodb/bin
--./mongod -shardsvr -f /data/mongodb/data/shard22.conf
--./mongod -shardsvr -f /data/mongodb/data/shard23.conf
--./mongod -configsvr -f /data/mongodb/data/config.conf
--./mongos -configdb 10.212.84.4:27019,10.212.46.5:27019,10.212.70.21:27019 -port 30000 -chunkSize 5 -logpath /data/mongodb/data/mongos.log -logappend -fork
Amongoshard05(10.212.70.21 ):
--$cd /data/mongodb/bin
--./mongod -shardsvr -f /data/mongodb/data/shard14.conf
--./mongod -shardsvr -f /data/mongodb/data/shard24.conf
--./mongod -configsvr -f /data/mongodb/data/config.conf
4.初始化副本集:
第一个副本集:
--#su - monogdb
--$cd /data/mongodb/bin
--$./mongo 10.212.74.43:27017
>use admin
>config={_id:‘shard1‘,members:[{_id:0,host:‘10.212.74.43:27017‘,priority:2},{_id:1,host:‘10.212.84.4:27017‘,priority:1},{_id:2,host:‘10.212.84.4:27018‘,arbiterOnly:true},{_id:3,host:‘10.212.70.21:27017‘,priority:0}]};
>rs.initiate(config)
Shard1:PRIMARY>rs.status()
第二个副本集:
--#su - monogdb
--$cd /data/mongodb/bin
--$./mongo 10.212.74.43:27017
>use admin
>config={_id:‘shard2‘,members:[{_id:0,host:‘10.212.98.23:27017‘,priority:2},{_id:1,host:‘10.212.46.5:27017‘,priority:1},{_id:2,host:‘10.212.46.5:27018‘,arbiterOnly:true},{_id:3,host:‘10.212.70.21:27018‘,priority:0}]};
>rs.initiate(config)
Shard2:PRIMARY>rs.status()
5.配置sharding:
Login到任意一台mongos机器上:
--#su - monogdb
--$cd /data/mongodb/bin
--$./mongo 10.212.74.43:30000/admin
mongos>db.runCommand( { addshard : "shard1/10.212.74.43:27017,10.212.84.4:27017,10.212.84.4:27018,10.212.70.21:27017",name:"shard1",maxsize:2048000});
mongos>db.runCommand( { addshard : "shard2/10.212.98.23:27017,10.212.46.5:27017,10.212.46.5:27018,10.212.70.21:27018",name:"shard2",maxsize:2048000});
mongos>db.runCommand({listshards:1})
6.数据库分片以及Collection分片:
--#su - monogdb
--$cd /data/mongodb/bin
--$./mongo 10.212.74.43:30000/admin
mongos>db.runCommand( { enablesharding : “<dbname>” } );
mongos> db.runCommand( { shardcollection : “<namespace>”,key : <shardkeypatternobject> });
注意:
--数据库中不同的collection将被存放在不同的shard上;
--一个collection仍旧存放在同一个shard上,要使单个collection也分片,还需单独对collection作些操作;
--分片的collection系统会自动创建一个索引(也可用户提前创建好);
--分片的collection只能有一个在分片key上的唯一索引,其它唯一索引不被允许
四、 测试与总结
使用for(i=1;i<=100000;i++){db.test.insert({_id:i})}语句对环境进行测试并查看分片情况。
部署时遇到的问题及解决方法:
问题1:如果在从机上查看数据时出现不能查看错误时,则在从机上执行命令:db.getMongo().setSlave0k()。再查询就可以了。Mongodb3.0以上版本的使用db.getMongo().setSlave0k()或rs.slaveOk()之后退出再次登录时还是会出现此错误,需要编辑文件:#vi ~/.mongorc.js添加rs.slaveOk();即可。
问题2:配置sharding后需注意maxSize值得指定,若发现数据开始可以分片后来不行则可能是数据储存超出maxSize的大小,调整之后即可。maxSize值(单位是M)表示一个shard可使用的磁盘大小,超出的数据不会分片但会存储在primary sharding上。使用一下语句指定或更改其大小:
第一种:
>db.runCommand({addshard:”shardIP:port”,maxSize:20480})
第二种:
>use config
>db.shards.update({_id:”[shardname]”},{$set:{maxSize:20480}})
标签:
原文地址:http://www.cnblogs.com/wsjhk/p/4469317.html