Mongodb 分片部署
配置mongodb集群，比如 在3个server上配置 3 shard的Mongodb集群：
架构：
1.每片数据需要3个mongod server，2个为主从数据节点；1个为仲裁节点(arbiter)，不存数据。一共三片，可以做成：
20.220-mongo1: 20001(sh1主)，20002(sh2从)，20003(sh3仲裁) 20.221-mongo2: 20002(sh2主)，20003(sh3从)，20001(sh1仲裁) 20.222-mongo3: 20003(sh3主)，20001(sh1从)，20002(sh2仲裁)
2. 需要3个mongod config server，登录3台机器执行如下
20.220-mongo1: 19999echo 'export PATH=$PATH:/usr/local/mongodb/bin' >> /etc/profiletar zxvf mongodb-linux-x86_64-2.6.0.tgzmv mongodb-linux-x86_64-2.6.0 /usr/local/mongodbmkdir -p /usr/local/mongodb/{etc,date,log}cd /usr/local/mongodb/datemkdir sh1mkdir sh2mkdir sh3mkdir cf1mkdir cf2mkdir cf3
20.221-mongo2: 19998echo 'export PATH=$PATH:/usr/local/mongodb/bin' >> /etc/profiletar zxvf mongodb-linux-x86_64-2.6.0.tgzmv mongodb-linux-x86_64-2.6.0 /usr/local/mongodbmkdir -p /usr/local/mongodb/{etc,date,log}cd /usr/local/mongodb/datemkdir sh1mkdir sh2mkdir sh3mkdir cf1mkdir cf2mkdir cf3
20.222-mongo3: 19997echo 'export PATH=$PATH:/usr/local/mongodb/bin' >> /etc/profiletar zxvf mongodb-linux-x86_64-2.6.0.tgzmv mongodb-linux-x86_64-2.6.0 /usr/local/mongodbmkdir -p /usr/local/mongodb/{etc,date,log}cd /usr/local/mongodb/datemkdir sh1mkdir sh2mkdir sh3mkdir cf1mkdir cf2mkdir cf3
3. mongos server 作为入口
192.168.20.220: 20000
1.启动mongod datanode service
/usr/local/mongodb/bin/mongod --fork --rest --replSet sh1 --shardsvr --oplogSize 40000 --dbpath /usr/local/mongodb/date/sh1 --logpath /usr/local/mongodb/log/sh1.log --port 20001/usr/local/mongodb/bin/mongod --fork --rest --replSet sh2 --shardsvr --oplogSize 40000 --dbpath /usr/local/mongodb/date/sh2 --logpath /usr/local/mongodb/log/sh2.log --port 20002/usr/local/mongodb/bin/mongod --fork --rest --replSet sh3 --shardsvr --oplogSize 40000 --dbpath /usr/local/mongodb/date/sh3 --logpath /usr/local/mongodb/log/sh3.log --port 20003
2.配置每片的 replica set，即每3台配成一个replica set互备
20.220-mongo1:主机mongo 192.168.20.220:20001/adminuse admin;
config = {_id: 'sh1', members:[{_id:0, host: '192.168.20.220:20001'},{_id:1, host: '192.168.20.221:20001'},{_id:2, host: '192.168.20.222:20001', arbiterOnly: true}]}
rs.initiate(config) //初始化repl set
rs.status() //看结果是否成功建成repl set
20.221-mongo2:主机mongo 192.168.20.221:20002/adminuse admin;
config = {_id: 'sh2', members:[{_id:0, host: '192.168.20.221:20002'},{_id:1, host: '192.168.20.222:20002'},{_id:2, host: '192.168.20.220:20002', arbiterOnly: true}]}
rs.initiate(config) //初始化repl set
rs.status() //看结果是否成功建成repl set
20.222-mongo3:主机mongo 192.168.20.222:20003/adminuse admin;
config = {_id: 'sh3', members:[{_id:0, host: '192.168.20.222:20003'},{_id:1, host: '192.168.20.220:20003'},{_id:2, host: '192.168.20.221:20003', arbiterOnly: true}]}
rs.initiate(config) //初始化repl set
rs.status() //看结果是否成功建成repl set
3.执行启动 config server:
/usr/local/mongodb/bin/mongod --fork --rest --configsvr --port 19999 --dbpath /usr/local/mongodb/date/cf1/ --logpath /usr/local/mongodb/log/cf1.log20.221-mongo2/usr/local/mongodb/bin/mongod --fork --rest --configsvr --port 19998 --dbpath /usr/local/mongodb/date/cf2/ --logpath /usr/local/mongodb/log/cf2.log20.222-mongo3/usr/local/mongodb/bin/mongod --fork --rest --configsvr --port 19997 --dbpath /usr/local/mongodb/date/cf3/ --logpath /usr/local/mongodb/log/cf3.log
4.启动 mongos server
/usr/local/mongodb/bin/mongos --configdb 192.168.20.220:19999,192.168.20.221:19998,192.168.20.222:19997 --logpath /usr/local/mongodb/log/mongos.log --logappend --fork --port 20000
5. 配置mongo 分片集群
mongo 192.168.20.220:20000/admin
mongos> db.runCommand({addshard:"sh1/192.168.20.220:20001,192.168.20.221:20001",name:"sh1"});
mongos> db.runCommand({addshard:"sh2/192.168.20.221:20002,192.168.20.222:20002",name:"sh2"});
mongos> db.runCommand({addshard:"sh3/192.168.20.222:20003,192.168.20.220:20003",name:"sh3"});
mongos> db.runCommand({listshards:1})
6. 激活数据库分片
登录mongos:
>use admin;
>db.runCommand( { enablesharding : "dbname" } );
>db.runCommand( { shardcollection : "dbname.collectionname", key :{ "keyfield" :1 }});
注意分片使用的keyfield需要是表索引。
sh.enableSharding("dbname")
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