【每日一博】MongoDB 分片搭建详解

一、环境

$ cat /etc/redhat-release  CentOS Linux release 7.0.1406 (Core)  $ uname -a Linux zhaopin-2-201 3.10.0-123.el7.x86_64 #1 SMP Mon Jun 30 12:09:22 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux $ mongo --version MongoDB shell version: 3.0.6

二、配置Shard Server

1.创建目录

$ sudo mkdir -p /data/mongodb/{data/{sh0,sh1},backup/{sh0,sh1},log/{sh0,sh1},conf/{sh0,sh1}}

2.准备配置文件

第一个分片：

$ sudo vim /data/mongodb/conf/sh0/mongodb.conf # base port = 27010 maxConns = 800  filePermissions = 0700 fork = true noauth = true directoryperdb = true dbpath = /data/mongodb/data/sh0 pidfilepath = /data/mongodb/data/sh0/mongodb.pid oplogSize = 10 journal = true # security nohttpinterface = true rest = false # log  logpath = /data/mongodb/log/sh0/mongodb.log logRotate = rename logappend = true slowms = 50 replSet = sh0  shardsvr = true

第二个分片：

$ sudo vim /data/mongodb/conf/sh1/mongodb.conf # base port = 27011 maxConns = 800  filePermissions = 0700 fork = true noauth = true directoryperdb = true dbpath = /data/mongodb/data/sh1 pidfilepath = /data/mongodb/data/sh1/mongodb.pid oplogSize = 10 journal = true # security nohttpinterface = true rest = false # log logpath = /data/mongodb/log/sh1/mongodb.log logRotate = rename logappend = true slowms = 50 replSet = sh1 shardsvr = true

3.启动Shard Server

$ sudo /opt/mongodb/bin/mongod --config /data/mongodb/conf/sh0/mongodb.conf about to fork child process, waiting until server is ready for connections. forked process: 41492 child process started successfully, parent exiting $ sudo /opt/mongodb/bin/mongod --config /data/mongodb/conf/sh1/mongodb.conf about to fork child process, waiting until server is ready for connections. forked process: 41509 child process started successfully, parent exiting $ ps aux | grep mongo | grep -v grep root     41492  0.5  0.0 518016 54604 ?        Sl   10:09   0:00 /opt/mongodb/bin/mongod --config /data/mongodb/conf/sh0/mongodb.conf root     41509  0.5  0.0 516988 51824 ?        Sl   10:09   0:00 /opt/mongodb/bin/mongod --config /data/mongodb/conf/sh1/mongodb.conf $ mongo --port 27010 MongoDB shell version: 3.0.6 connecting to: 127.0.0.1:27010/test > bye $ mongo --port 27011 MongoDB shell version: 3.0.6 connecting to: 127.0.0.1:27011/test > bye

三、配置Config Server

1.创建目录

$ sudo mkdir -p /data/mongodb/{data/{cf0,cf1,cf2},backup/{cf0,cf1,cf2},log/{cf0,cf1,cf2},conf/{cf0,cf1,cf2}}

2.准备配置文件

第一个配置服务器：

$ sudo vim /data/mongodb/conf/cf0/config.conf # base port = 27000 maxConns = 800 filePermissions = 0700 fork = true noauth = true directoryperdb = true dbpath = /data/mongodb/data/cf0 pidfilepath = /data/mongodb/data/cf0/config.pid oplogSize = 10 journal = true # security nohttpinterface = true rest = false # log logpath = /data/mongodb/log/cf0/config.log logRotate = rename logappend = true slowms = 50 configsvr = true

第二个配置服务器：

$ sudo vim /data/mongodb/conf/cf1/config.conf # base port = 27001 maxConns = 800 filePermissions = 0700 fork = true noauth = true directoryperdb = true dbpath = /data/mongodb/data/cf1 pidfilepath = /data/mongodb/data/cf1/config.pid oplogSize = 10 journal = true # security nohttpinterface = true rest = false # log logpath = /data/mongodb/log/cf1/config.log logRotate = rename logappend = true slowms = 50 configsvr = true

第三个配置服务器：

$ sudo vim /data/mongodb/conf/cf2/config.conf # base port = 27002 maxConns = 800 filePermissions = 0700 fork = true noauth = true directoryperdb = true dbpath = /data/mongodb/data/cf2 pidfilepath = /data/mongodb/data/cf2/config.pid oplogSize = 10 journal = true # security nohttpinterface = true rest = false # log logpath = /data/mongodb/log/cf2/config.log logRotate = rename logappend = true slowms = 50 configsvr = true

3.启动

$ sudo /opt/mongodb/bin/mongod --config /data/mongodb/conf/cf0/config.conf about to fork child process, waiting until server is ready for connections. forked process: 41759 child process started successfully, parent exiting $ sudo /opt/mongodb/bin/mongod --config /data/mongodb/conf/cf1/config.conf about to fork child process, waiting until server is ready for connections. forked process: 41774 child process started successfully, parent exiting $ sudo /opt/mongodb/bin/mongod --config /data/mongodb/conf/cf2/config.conf about to fork child process, waiting until server is ready for connections. forked process: 42170 child process started successfully, parent exiting $ ps aux | grep mongo | grep -v grep root     41492  0.3  0.0 518016 54728 ?        Sl   10:09   0:06 /opt/mongodb/bin/mongod --config /data/mongodb/conf/sh0/mongodb.conf root     41509  0.3  0.0 518016 54760 ?        Sl   10:09   0:06 /opt/mongodb/bin/mongod --config /data/mongodb/conf/sh1/mongodb.conf root     41855  0.4  0.0 467828 51684 ?        Sl   10:25   0:03 /opt/mongodb/bin/mongod --config /data/mongodb/conf/cf0/config.conf root     41870  0.4  0.0 467828 52312 ?        Sl   10:25   0:03 /opt/mongodb/bin/mongod --config /data/mongodb/conf/cf1/config.conf root     42170  0.9  0.0 467824 52392 ?        Sl   10:37   0:00 /opt/mongodb/bin/mongod --config /data/mongodb/conf/cf2/config.conf

四、配置Query Routers

1.创建目录

$ sudo mkdir -p /data/mongodb/{data/{ms0,ms1},backup/{ms0,ms1},log/{ms0,ms1},conf/{ms0,ms1}}

2.准备配置文件

第一个配置服务器：

$ sudo vim /data/mongodb/conf/ms0/mongos.conf # base port = 30000 maxConns = 800 filePermissions = 0700 fork = true pidfilepath = /data/mongodb/data/ms0/mongos.pid # log logpath = /data/mongodb/log/ms0/mongos.log logRotate = rename logappend = true configdb = 172.30.2.201:27000,172.30.2.201:27001,172.30.2.201:27002

第二个配置服务器：

$ sudo vim /data/mongodb/conf/ms1/mongos.conf # base port = 30000 maxConns = 800  filePermissions = 0700 fork = true pidfilepath = /data/mongodb/data/ms1/mongos.pid # log  logpath = /data/mongodb/log/ms1/mongos.log logRotate = rename logappend = true configdb = 172.30.2.201:27000,172.30.2.201:27001,172.30.2.201:27002

3.启动

$ sudo /opt/mongodb/bin/mongos --config /data/mongodb/conf/ms0/mongos.conf about to fork child process, waiting until server is ready for connections. forked process: 42233 child process started successfully, parent exiting $ sudo /opt/mongodb/bin/mongos --config /data/mongodb/conf/ms1/mongos.conf about to fork child process, waiting until server is ready for connections. forked process: 42286 child process started successfully, parent exiting $ ps aux | grep mongo | grep -v grep root     41492  0.3  0.0 518016 54728 ?        Sl   10:09   0:06 /opt/mongodb/bin/mongod --config /data/mongodb/conf/sh0/mongodb.conf root     41509  0.3  0.0 518016 54760 ?        Sl   10:09   0:07 /opt/mongodb/bin/mongod --config /data/mongodb/conf/sh1/mongodb.conf root     41855  0.4  0.0 546724 37812 ?        Sl   10:25   0:03 /opt/mongodb/bin/mongod --config /data/mongodb/conf/cf0/config.conf root     41870  0.4  0.0 546724 38188 ?        Sl   10:25   0:03 /opt/mongodb/bin/mongod --config /data/mongodb/conf/cf1/config.conf root     42170  0.6  0.0 546720 41960 ?        Sl   10:37   0:00 /opt/mongodb/bin/mongod --config /data/mongodb/conf/cf2/config.conf root     42233  0.5  0.0 233536 10188 ?        Sl   10:38   0:00 /opt/mongodb/bin/mongos --config /data/mongodb/conf/ms0/mongos.conf root     42286  0.4  0.0 241728  9056 ?        Sl   10:38   0:00 /opt/mongodb/bin/mongos --config /data/mongodb/conf/ms1/mongos.conf

五、初始化单节点副本集

配置副本集的好处是为了高可用，配置单节点是我自己为了节省时间，后续添加节点和副本集的操作一样，分片的配置不需要修改

分片一：

$ mongo --port 27010 MongoDB shell version: 3.0.6 connecting to: 127.0.0.1:27010/test > use admin switched to db admin > cfg={_id:"sh0", members:[ {_id:0,host:"172.30.2.201:27010"}] } {  "_id" : "sh0",  "members" : [   {    "_id" : 0,    "host" : "172.30.2.201:27010"   }  ] } > rs.initiate( cfg ); { "ok" : 1 } sh0:OTHER> rs.status(); {  "set" : "sh0",  "date" : ISODate("2015-10-09T02:45:39.178Z"),  "myState" : 1,  "members" : [   {    "_id" : 0,    "name" : "172.30.2.201:27010",    "health" : 1,    "state" : 1,    "stateStr" : "PRIMARY",    "uptime" : 2197,    "optime" : Timestamp(1444358731, 1),    "optimeDate" : ISODate("2015-10-09T02:45:31Z"),    "electionTime" : Timestamp(1444358731, 2),    "electionDate" : ISODate("2015-10-09T02:45:31Z"),    "configVersion" : 1,    "self" : true   }  ],  "ok" : 1 } sh0:PRIMARY> bye 

分片二：

$ mongo --port 27011 MongoDB shell version: 3.0.6 connecting to: 127.0.0.1:27011/test > cfg={_id:"sh1", members:[ {_id:0,host:"172.30.2.201:27011"}] } {  "_id" : "sh1",  "members" : [   {    "_id" : 0,    "host" : "172.30.2.201:27011"   }  ] } > rs.initiate( cfg ); { "ok" : 1 } sh1:OTHER> rs.status(); {  "set" : "sh1",  "date" : ISODate("2015-10-09T02:46:32.961Z"),  "myState" : 1,  "members" : [   {    "_id" : 0,    "name" : "172.30.2.201:27011",    "health" : 1,    "state" : 1,    "stateStr" : "PRIMARY",    "uptime" : 2244,    "optime" : Timestamp(1444358790, 1),    "optimeDate" : ISODate("2015-10-09T02:46:30Z"),    "electionTime" : Timestamp(1444358790, 2),    "electionDate" : ISODate("2015-10-09T02:46:30Z"),    "configVersion" : 1,    "self" : true   }  ],  "ok" : 1 } sh1:PRIMARY> bye 

六、配置分片

$ mongo --port 30000 MongoDB shell version: 3.0.6 connecting to: 127.0.0.1:30000/test mongos> use admin; switched to db admin mongos> sh.addShard("sh0/172.30.2.201:27010"); { "shardAdded" : "sh0", "ok" : 1 } mongos> sh.addShard("sh1/172.30.2.201:27011"); { "shardAdded" : "sh1", "ok" : 1 } mongos> use mydb; switched to db mydb mongos> db.createCollection("test"); {  "ok" : 1,  "$gleStats" : {   "lastOpTime" : Timestamp(1444358911, 1),   "electionId" : ObjectId("56172a4bc03d9b1667f8e928")  } } mongos> sh.enableSharding("mydb"); { "ok" : 1 } mongos> sh.shardCollection("mydb.test", {"_id":1}); { "collectionsharded" : "mydb.test", "ok" : 1 } mongos> sh.status(); --- Sharding Status ---   sharding version: {  "_id" : 1,  "minCompatibleVersion" : 5,  "currentVersion" : 6,  "clusterId" : ObjectId("561728b4030ea038bcb57fa0") }   shards:  {  "_id" : "sh0",  "host" : "sh0/172.30.2.201:27010" }  {  "_id" : "sh1",  "host" : "sh1/172.30.2.201:27011" }   balancer:  Currently enabled:  yes  Currently running:  no  Failed balancer rounds in last 5 attempts:  0  Migration Results for the last 24 hours:   No recent migrations   databases:  {  "_id" : "admin",  "partitioned" : false,  "primary" : "config" }  {  "_id" : "mydb",  "partitioned" : true,  "primary" : "sh0" }   mydb.test    shard key: { "_id" : 1 }    chunks:     sh0     1    { "_id" : { "$minKey" : 1 } } -->> { "_id" : { "$maxKey" : 1 } } on : sh0 Timestamp(1, 0) 

可见分片已经配置完成了

七、添加开机启动项

$ sudo vim /etc/rc.local /opt/mongodb/bin/mongod --config /data/mongodb/conf/sh0/mongodb.conf /opt/mongodb/bin/mongod --config /data/mongodb/conf/sh1/mongodb.conf /opt/mongodb/bin/mongod --config /data/mongodb/conf/cf0/config.conf /opt/mongodb/bin/mongod --config /data/mongodb/conf/cf1/config.conf /opt/mongodb/bin/mongod --config /data/mongodb/conf/cf2/config.conf /opt/mongodb/bin/mongos --config /data/mongodb/conf/ms0/mongos.conf /opt/mongodb/bin/mongos --config /data/mongodb/conf/ms1/mongos.conf