MongoDB 分片（Cluster）

基本环境：

由于资源紧张，只有3台虚拟机的关系，只做两个replicaSet，每台机器配置分别如下：

10.10.1.55这台机器安装 Primary1，configServer1， Arbiter1

10.10.1.56 安装 Primary2，configServer2, Arbiter2

10.10.1.57 安装 Secondary1,Secondary2,configServer3,mongos

1.55机器的配置文件如下：

Primary1的conf文件：

dbpath=/data/mongodb/rs0_0logpath=/data/mongodb/log/rs0_0.loglogappend=trueport=40000bind_ip=192.168.11.55,10.10.1.55oplogSize=10000fork=truejournal = true#noprealloc = truereplSet=rs0directoryperdb=true

Arbiter1的配置文件：

dbpath=/data/mongodb/rs0_arbiterlogpath=/data/mongodb/log/rs0_arbiter.loglogappend=trueport=40002bind_ip=192.168.11.55,10.10.1.55oplogSize=10000fork=truejournal = true#noprealloc = truereplSet=rs0directoryperdb=true

ConfigServer1的配置文件：

dbpath=/data/mongodb/rs0_conflogpath=/data/mongodb/log/rs0_conf.loglogappend=trueport=40006bind_ip=192.168.11.55,10.10.1.55fork=truejournal = true#noprealloc = trueconfigsvr=truedirectoryperdb=true

分别通过mongod --config filename 来启动不同的mongo 进程，成功启动后可以通过netstat 查看在1.55 机器上分别分配了Primary1端口：40000，Arbiter1端口：40002，configureServer1端口：40006

1.56机器的配置：

Primary2的配置文件：

dbpath=/data/mongodb/rs1_primarylogpath=/data/mongodb/log/rs1_p.loglogappend=truebind_ip=192.168.11.56,10.10.1.56directoryperdb=true  port=40003oplogSize=10000fork=truejournal = truenoprealloc = truereplSet=rs1

Arbiter2配置文件：

dbpath=/data/mongodb/rs1_arbiterlogpath=/data/mongodb/log/rs1_a.loglogappend=truebind_ip=192.168.11.56,10.10.1.56directoryperdb=true  port=40005oplogSize=10000fork=truejournal = truenoprealloc = truereplSet=rs1

ConfigureServer2配置文件：

dbpath=/data/mongodb/rs1_conflogpath=/data/mongodb/log/rs1_conf.loglogappend=truebind_ip=192.168.11.56,10.10.1.56directoryperdb=true  port=40007oplogSize=10000fork=truejournal = truenoprealloc = trueconfigsvr=true

分别通过mongod --config filename 来启动不同的mongo 进程，成功启动后可以通过netstat 查看在1.55 机器上分别分配了Primary2端口：40003，Arbiter2端口：40005，configureServer2端口：40007

1.56机器的配置：

rs0_Secondary1配置：

dbpath=/data/mongodb/rs0_secondary1logpath=/data/mongodb/log/rs0_secondary1.loglogappend=trueport=40001bind_ip=192.168.11.57,10.10.1.57oplogSize=10000fork=truejournal = true#noprealloc = truereplSet=rs0directoryperdb=true

rs1_Secondary1配置：

dbpath=/data/mongodb/rs1_secondary1logpath=/data/mongodb/log/rs1_secondary1.loglogappend=truebind_ip=192.168.11.57,10.10.1.57directoryperdb=true  port=40004oplogSize=10000fork=truejournal = truenoprealloc = truereplSet=rs1

configureServer3配置：

dbpath=/data/mongodb/confSvr3logpath=/data/mongodb/log/conf3.loglogappend=truebind_ip=192.168.11.57,10.10.1.57directoryperdb=true  port=40008oplogSize=10000fork=truejournal = trueconfigsvr=true

mongos 配置：(启动mongos路由器要注意多台服务器时间必须要同步，否则出现错误)

logpath=/data/mongodb/log/mongos.logport = 40009configdb=10.10.1.55:40006,10.10.1.56:40007,10.10.1.57:40008fork = true

分别通过mongod --config filename 来启动不同的mongo 进程，成功启动后可以通过netstat 查看在1.55 机器上分别分配了rs0_secondary1端口：40001，rs1_secondary1端口：40004，configureServer3端口：40008，mongos路由端口：40009

现在用mongo shell登录primary1 配置replicaSet0,步骤如下：

cfg={ "_id" : "rs0", "members" : [ { "_id" : 0, "host" : "10.10.1.55:40000" }, { "_id" : 1, "host" : "10.10.1.57:40001" } ] }

rs.initiate(cfg)
rs.status()

rs.addArb("10.10.1.55:40002")

现在用mongo shell登录primary2 配置replicaSet1,步骤如下：

cfg={ "_id" : "rs1", "members" : [ { "_id" : 0, "host" : "10.10.1.56:40003" }, { "_id" : 1, "host" : "10.10.1.57:40004" } ] }

rs.initiate(cfg)
rs.status()

rs.addArb("10.10.1.56:40005")

使用mongo shell登录mongos路由添加分片信息：

mongo --host 10.10.1.57 --port 40009mongos> sh.addShard("rs0/10.10.1.55:40000,10.10.1.57:40001"){ "shardAdded" : "rs0", "ok" : 1 }mongos> sh.addShard("rs1/10.10.1.56:40003,10.10.1.57:40004"){ "shardAdded" : "rs1", "ok" : 1 }mongos> sh.status()--- Sharding Status ---   sharding version: {    "_id" : 1,    "version" : 4,    "minCompatibleVersion" : 4,    "currentVersion" : 5,    "clusterId" : ObjectId("561c7bdd4315b18f9862adb4")}  shards:    {  "_id" : "rs0",  "host" : "rs0/10.10.1.55:40000,10.10.1.57:40001" }    {  "_id" : "rs1",  "host" : "rs1/10.10.1.56:40003,10.10.1.57:40004" }  databases:    {  "_id" : "admin",  "partitioned" : false,  "primary" : "config" }

现在创建一个新的数据库来测试一下分片：

mongos> use people
switched to db people
mongos> for(var i=1;i<10;i++) db.customers.insert({name:"jordan"+i,country:"American"})
WriteResult({ "nInserted" : 1 })
mongos> for(var i=1;i<10;i++) db.customers.insert({name:"gaga"+i,country:"American"})
WriteResult({ "nInserted" : 1 })
mongos> for(var i=1;i<10;i++) db.customers.insert({name:"ham"+i,country:"UK"})
WriteResult({ "nInserted" : 1 })
mongos> for(var i=1;i<10;i++) db.customers.insert({name:"brown"+i,country:"UK"})
WriteResult({ "nInserted" : 1 })
mongos> for(var i=1;i<10;i++) db.customers.insert({name:"ramda"+i,country:"Malaysia"})
WriteResult({ "nInserted" : 1 })

开始建立分片：

mongos> db.customers.ensureIndex({country:1,_id:1}){    "raw" : {        "rs0/10.10.1.55:40000,10.10.1.57:40001" : {            "createdCollectionAutomatically" : false,            "numIndexesBefore" : 1,            "numIndexesAfter" : 2,            "ok" : 1        }    },    "ok" : 1}mongos> sh.shardCollection("people.customers",{country:1,_id:1}){ "collectionsharded" : "people.customers", "ok" : 1 }mongos> sh.status()--- Sharding Status ---   sharding version: {    "_id" : 1,    "version" : 4,    "minCompatibleVersion" : 4,    "currentVersion" : 5,    "clusterId" : ObjectId("561c7bdd4315b18f9862adb4")}  shards:    {  "_id" : "rs0",  "host" : "rs0/10.10.1.55:40000,10.10.1.57:40001" }    {  "_id" : "rs1",  "host" : "rs1/10.10.1.56:40003,10.10.1.57:40004" }  databases:    {  "_id" : "admin",  "partitioned" : false,  "primary" : "config" }    {  "_id" : "test",  "partitioned" : false,  "primary" : "rs0" }    {  "_id" : "people",  "partitioned" : true,  "primary" : "rs0" }        people.customers            shard key: { "country" : 1, "_id" : 1 }            chunks:                rs0    1            { "country" : { "$minKey" : 1 }, "_id" : { "$minKey" : 1 } } -->> { "country" : { "$maxKey" : 1 }, "_id" : { "$maxKey" : 1 } } on : rs0 Timestamp(1, 0)

现在由于数据量不多只有一个分片在rs0上，可以通过增加数据量来提高分片：

for(var i=10;i<10000;i++) db.customers.insert({name:"ham"+i,country:"UK"})for(var i=10;i<10000;i++) db.customers.insert({name:"ramda"+i,country:"Malaysia"})

mongos> sh.status()
--- Sharding Status ---
sharding version: {
"_id" : 1,
"version" : 4,
"minCompatibleVersion" : 4,
"currentVersion" : 5,
"clusterId" : ObjectId("561c7bdd4315b18f9862adb4")
}
shards:
{ "_id" : "rs0", "host" : "rs0/10.10.1.55:40000,10.10.1.57:40001" }
{ "_id" : "rs1", "host" : "rs1/10.10.1.56:40003,10.10.1.57:40004" }
databases:
{ "_id" : "admin", "partitioned" : false, "primary" : "config" }
{ "_id" : "test", "partitioned" : false, "primary" : "rs0" }
{ "_id" : "people", "partitioned" : true, "primary" : "rs0" }
people.customers
shard key: { "country" : 1, "_id" : 1 }
chunks:
rs1 2
rs0 1
{ "country" : { "$minKey" : 1 }, "_id" : { "$minKey" : 1 } } -->> { "country" : "American", "_id" : ObjectId("561c7da73af7c7865defefb1") } on : rs1 Timestamp(2, 0)
{ "country" : "American", "_id" : ObjectId("561c7da73af7c7865defefb1") } -->> { "country" : "UK", "_id" : ObjectId("561c7db63af7c7865defefd4") } on : rs0 Timestamp(3, 1)
{ "country" : "UK", "_id" : ObjectId("561c7db63af7c7865defefd4") } -->> { "country" : { "$maxKey" : 1 }, "_id" : { "$maxKey" : 1 } } on : rs1 Timestamp(3, 0)

现在rs0上有一个分片，rs1上有两个分片