mongdb3.4 的副本集搭建与以前的版本有些区别,最主要的区别就是 configdb强制复制集(CSRS)。网上很多的教程都没有注意到这一点,所以在使用3.4版本的时候搭建不成功。
搭建时遇到不少坑,几乎放弃的情况下,借助谷歌翻译查看了官方文档,问题迎刃而解。
官方文档:Sharding - MongoDB Manual 3.4
一、测试环境
操作体统:VMware + ubuntu16.04 + 静态IP
mongodb版本:mongodb-3.4
二、布局预览
三、资源分配
IP分配:
机器1:192.168.80.61
机器2:192.168.80.62
机器3:192.168.80.63
机器4:192.168.80.64
机器5:192.168.80.65
机器6:192.168.80.66
端口分配:
mongos:18000
config:17000
shard01:18001
shard02:18002
shard03:18003
shard04:18004
shard05:18005
shard06:18006
表1
创建相关目录:
三台主机分别新建如下目录:
/home/ubuntu/data/mongodb/config/data
/home/ubuntu/data/mongodb/config/log/
/home/ubuntu/data/mongodb/mongos/log
六台机器分别创建 表1 对应的分片,每台机器三个分片
/home/ubuntu/data/mongodb/shard0X/data
/home/ubuntu/data/mongodb/shard0X/log
四、启动配置服务器
这是最关键的一步,网上一些教程报错的主要原因就在于congfigsvr配置不是针对版本3.4分别
- 在每一台路由机器上启动配置服务器(非第一次启动加
--logappend)
mongod –configsvr --replSet cfgsvr –port 17000 –dbpath /home/ubuntu/data/mongodb/config/data --logpath /home/ubuntu/data/mongodb/config/log/config.log –fork
2. 登录任意一台配置服务器,初始化配置副本集
mongo 127.0.0.1:17000
> config = {_id:"cfgsvr", configsvr:true, members:[
{_id:0, host:"192.168.80.61:17000"},
{_id:0, host:"192.168.80.62:17000"},
{_id:0, host:"192.168.80.63:17000"}
]}
>rs.initiate(config)
五、启动分片
分别在每台机器上启动的设计的分片(例见上图)shardxx、shardxx、shardxx。(非第一次启动加 --logappend)
#Shard01:
mongod --shardsvr --replSet shard01 --port 18001 --dbpath /home/ubuntu/data/mongodb/shard01/data --logpath /home/ubuntu/data/mongodb/shard01/log/shard01.log --fork
#Shard02:
mongod --shardsvr --replSet shard02 --port 18002 --dbpath /home/ubuntu/data/mongodb/shard02/data --logpath /home/ubuntu/data/mongodb/shard02/log/shard02.log --fork
#Shard03:
mongod --shardsvr --replSet shard03 --port 18003 --dbpath /home/ubuntu/data/mongodb/shard03/data --logpath /home/ubuntu/data/mongodb/shard03/log/shard03.log --fork
#Shard04:
mongod --shardsvr --replSet shard04 --port 18004 --dbpath /home/ubuntu/data/mongodb/shard04/data --logpath /home/ubuntu/data/mongodb/shard04/log/shard04.log --fork
#Shard05:
mongod --shardsvr --replSet shard05 --port 18005 --dbpath /home/ubuntu/data/mongodb/shard05/data --logpath /home/ubuntu/data/mongodb/shard05/log/shard05.log --fork
#Shard06:
mongod --shardsvr --replSet shard06 --port 18006 --dbpath /home/ubuntu/data/mongodb/shard06/data --logpath /home/ubuntu/data/mongodb/shard06/log/shard06.log --fork
六、启动mongos服务器
分别在每一台路由机器上启动mongos服务器,(非第一次启动加 --logappend)注意命令:mongos 不是mongod
mongos --configdb cfgsvr/192.168.80.61:17000, 192.168.80.62:17000, 192.168.80.63:17000 --port 18000 --logpath /home/ubuntu/data/mongodb/mongos/log/mongos.log --fork
七、初始化分片
在任一机器(机器上有对应shardxx即可,可在1、4号机器),通过分片端口登陆分片,并初始化分片
#Shard01:
mongo 127.0.0.1:18001
> use admin
> config = { _id:"shard01", members:[
{_id:0,host:"192.168.80.61:18001"},
{_id:1,host:"192.168.80.66:18001"},
{_id:2,host:"192.168.80.65:18001"}]
}
> rs.initiate(config)
#Shard02:**
mongo 127.0.0.1:18002
> use admin
> config = { _id:"shard02", members:[
{_id:0,host:"192.168.80.62:18002"},
{_id:1,host:"192.168.80.61:18002"},
{_id:2,host:"192.168.80.66:18002"}]
}
> rs.initiate(config)
#Shard03:**
mongo 127.0.0.1:18003
> use admin
> config = { _id:"shard03", members:[
{_id:0,host:"192.168.80.63:18003"},
{_id:1,host:"192.168.80.62:18003"},
{_id:2,host:"192.168.80.61:18003"}]
}
> rs.initiate(config)
#Shard04:**
mongo 127.0.0.1:18004
> use admin
> config = { _id:"shard04", members:[
{_id:0,host:"192.168.80.64:18004"},
{_id:1,host:"192.168.80.63:18004"},
{_id:2,host:"192.168.80.62:18004"}]
}
> rs.initiate(config)
#Shard05:**
mongo 127.0.0.1:18005
> use admin
> config = { _id:"shard05", members:[
{_id:0,host:"192.168.80.65:18005"},
{_id:1,host:"192.168.80.64:18005"},
{_id:2,host:"192.168.80.63:18005"}]
}
> rs.initiate(config)
#Shard06:**
mongo 127.0.0.1:18006
> use admin
> config = { _id:"shard06", members:[
{_id:0,host:"192.168.80.66:18006"},
{_id:1,host:"192.168.80.65:18006"},
{_id:2,host:"192.168.80.64:18006"}]
}
> rs.initiate(config)
八、启用分片
登陆mongos,添加所有分片
mongo 127.0.0.1:18000
> use admin
> sh.addShard("shard01/192.168.80.61:18001,192.168.80.66:18001,192.168.80.65:18001"})
> sh.addShard("shard02/192.168.80.62:18002,192.168.80.61:18002,192.168.80.66:18002"})
> sh.addShard("shard03/192.168.80.63:18003,192.168.80.62:18003,192.168.80.61:18003"})
> sh.addShard("shard04/192.168.80.64:18004,192.168.80.63:18004,192.168.80.62:18004"})
> sh.addShard("shard05/192.168.80.65:18005,192.168.80.64:18005,192.168.80.63:18005"})
> sh.addShard("shard06/192.168.80.66:18006,192.168.80.65:18006,192.168.80.64:18006"})
九、指定数据库、集合、片键
登陆mongos,这里可以选择hash分片还是range分片
mongo 127.0.0.1:18000
> sh.enableSharding("testdb")
>Sh.shardCollection("testdb.table1",{id:1}})