環境準備Centos6.5

三臺伺服器：

10.68.17.106、10.68.17.109、10.68.17.110

埠分配：

mongos:20000、config:21000、shard1:27001、shard2:27002、shard3:27003

分別為每臺機器建立mongos、config、shard1、shard2、shard3這些目錄，因為mongos不儲存資料，只需要建立日誌檔案目錄即可。

mkdir -p /usr/local/mongodb/mongos/log
mkdir -p /usr/local/mongodb/config/data
mkdir -p /usr/local/mongodb/config/log
mkdir -p /usr/local/mongodb/shard1/data
mkdir -p /usr/local/mongodb/shard1/log
mkdir -p /usr/local/mongodb/shard2/data
mkdir -p /usr/local/mongodb/shard2/log
mkdir -p /usr/local/mongodb/shard3/data
mkdir -p /usr/local/mongodb/shard3/log
 

mongodb3.4以後版本要求配置伺服器也建立副本集，不然叢集搭建不成功。

新增配置檔案：

[[email protected] ~]# vim /usr/local/mongodb/conf/config.conf

## 配置檔案內容
pidfilepath = /usr/local/mongodb/config/log/configsrv.pid
dbpath = /usr/local/mongodb/config/data
logpath = /usr/local/mongodb/config/log/congigsrv.log
logappend = true
 
bind_ip = 0.0.0.0
port = 21000
fork = true
 
#declare this is a config db of a cluster;
configsvr = true

#副本集名稱
replSet=configs
 
#設定最大連線數
maxConns=20000
 

[[email protected] ~]# mongod -f /usr/local/mongodb/conf/config.conf

[[email protected] ~]# mongo --port 21000

#config變數
config = {
...    _id : "configs",
...     members : [
...         {_id : 0, host : "10.68.17.106:21000" },
...         {_id : 1, host : "10.68.17.109:21000" },
...         {_id : 2, host : "10.68.17.110:21000" }
...     ]
... }

#初始化副本集
rs.initiate(config)
 

2、配置分片副本集（三臺機器）
設定第一個分片副本集

配置檔案

[[email protected] ~]# /usr/local/mongodb/conf/shard1.conf

#配置檔案內容
#——————————————–
pidfilepath = /usr/local/mongodb/shard1/log/shard1.pid
dbpath = /usr/local/mongodb/shard1/data
logpath = /usr/local/mongodb/shard1/log/shard1.log
logappend = true

bind_ip = 0.0.0.0
port = 27001
fork = true
 
#開啟web監控
httpinterface=true
rest=true
 
#副本集名稱
replSet=shard1
 
#declare this is a shard db of a cluster;
shardsvr = true
 
#設定最大連線數
maxConns=20000

[[email protected] ~]# mongod -f /usr/local/mongodb/conf/shard1.conf

[[email protected] ~]# mongo --port 27001

#使用admin資料庫
use admin
#定義副本集配置，第三個節點的 "arbiterOnly":true 代表其為仲裁節點。
config = {
...    _id : "shard1",
...     members : [
...         {_id : 0, host : "10.68.17.106:27001" },
...         {_id : 1, host : "10.68.17.109:27001" },
...         {_id : 2, host : "10.68.17.110:27001" , arbiterOnly: true }
...     ]
... }
#初始化副本集配置
rs.initiate(config);

配置檔案

[[email protected] ~]# vim /usr/local/mongodb/conf/shard2.conf

#配置檔案內容
#——————————————–
pidfilepath = /usr/local/mongodb/shard2/log/shard2.pid
dbpath = /usr/local/mongodb/shard2/data
logpath = /usr/local/mongodb/shard2/log/shard2.log
logappend = true

bind_ip = 0.0.0.0
port = 27002
fork = true
 
#開啟web監控
httpinterface=true
rest=true
 
#副本集名稱
replSet=shard2
 
#declare this is a shard db of a cluster;
shardsvr = true
 
#設定最大連線數
maxConns=20000

[[email protected] ~]# mongod -f /usr/local/mongodb/conf/shard2.conf

[[email protected] ~]# mongo --port 27002

#使用admin資料庫
use admin
#定義副本集配置
config = {
...    _id : "shard2",
...     members : [
...         {_id : 0, host : "10.68.17.106:27002"  , arbiterOnly: true },
...         {_id : 1, host : "10.68.17.109:27002" },
...         {_id : 2, host : "10.68.17.110:27002" }
...     ]
... }

#初始化副本集配置
rs.initiate(config);

配置檔案

[[email protected] ~]# vim /usr/local/mongodb/conf/shard3.conf

#配置檔案內容
#——————————————–
pidfilepath = /usr/local/mongodb/shard3/log/shard3.pid
dbpath = /usr/local/mongodb/shard3/data
logpath = /usr/local/mongodb/shard3/log/shard3.log
logappend = true

bind_ip = 0.0.0.0
port = 27003
fork = true
 
#開啟web監控
httpinterface=true
rest=true
 
#副本集名稱
replSet=shard3
 
#declare this is a shard db of a cluster;
shardsvr = true
 
#設定最大連線數
maxConns=20000

[[email protected] ~]# mongod -f /usr/local/mongodb/conf/shard3.conf

[[email protected] ~]# mongo --port 27003

#使用admin資料庫
use admin
#定義副本集配置
config = {
...    _id : "shard3",
...     members : [
...         {_id : 0, host : "10.68.17.106:27003" },
...         {_id : 1, host : "10.68.17.109:27003" , arbiterOnly: true},
...         {_id : 2, host : "10.68.17.110:27003" }
...     ]
... }

#初始化副本集配置
rs.initiate(config);

先啟動配置伺服器和分片伺服器，後啟動路由例項。

[[email protected] ~]# vim /usr/local/mongodb/conf/mongos.conf

#內容
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 = 20000
fork = true

#監聽的配置伺服器,只能有1個或者3個 configs為配置伺服器的副本集名字
configdb = configs/10.68.17.106:21000,10.68.17.109:21000,10.68.17.110:21000
 
#設定最大連線數
maxConns=20000

[[email protected] ~]# mongos -f /usr/local/mongodb/conf/mongos.conf

目前搭建了mongodb配置伺服器、路由伺服器、各個分片伺服器，不過應用程式連線到mongos路由伺服器並不能使用分片機制，還需要在程式裡設定分片配置，讓分片生效。

登入任意一臺mongos

[[email protected] ~]# mongo --port 20000

#使用admin資料庫
user  admin
#串聯路由伺服器與分配副本集
sh.addShard("shard1/10.68.17.106:27001,10.68.17.109:27001,10.68.17.110:27001")
sh.addShard("shard2/10.68.17.106:27002,10.68.17.109:27002,10.68.17.110:27002")
sh.addShard("shard3/10.68.17.106:27003,10.68.17.109:27003,10.68.17.110:27003")
#檢視叢集狀態
sh.status()

#指定testdb分片生效
db.runCommand( { enablesharding :"testdb"});
#指定資料庫裡需要分片的集合和片鍵
db.runCommand( { shardcollection : "testdb.table1",key : {id: 1} } )