Mongodb - 切片搭建

0.概述

mongodb分片搭建,版本号4.0.2,以下除了创建opt文件夹以外，所有操作均在mongodb用户下面执行

准备三台机器：
192.168.56.81
192.168.56.82
192.168.56.83
配置服务器端口号：20000
路由服务器端口号：20004
分片服务器端口号：20001/20002/20003

1.启动Config Server,端口号设置为20000

（把以下的步骤分别在三台服务器中执行一遍）
mkdir /opt
chown mongodb:mongodb /opt
su - mongodb
cd /opt
mkdir -p ./shard/config
mkdir -p ./shard/config/data
mkdir -p ./shard/config/log

mongod --configsvr --dbpath=/opt/shard/config/data --logpath=/opt/shard/config/log/config.log --port 20000 --fork --logappend --replSet rsconf --bind_ip_all

2.在其中一台初始化Config Server集群

192.168.56.81：
mongo --port 20000

use admin

config = {_id: 'rsconf', members: [
{_id: 0, host: '192.168.56.81:20000'},
{_id: 1, host: '192.168.56.82:20000'},
{_id: 2, host: '192.168.56.83:20000'}]}

rs.initiate(config)
rs.conf()
rs.status()

3.启动Query Routers,端口号设置为20004

（把以下的步骤分别在三台服务器中执行一遍）
cd /opt
mkdir -p ./shard/mongos
mkdir -p ./shard/mongos/log

mongos --configdb rsconf/192.168.56.81:20000,192.168.56.82:20000,192.168.56.83:20000 --logpath=/opt/shard/mongos/log/mongos.log --port 20004 --fork --logappend

4.启动Shard Server 1,集群名字rs1,端口号20001

（把以下的步骤分别在三台服务器中执行一遍）
cd /opt
mkdir -p ./shard/replset/rs1/data
mkdir -p ./shard/replset/rs1/log

mongod --shardsvr --replSet rs1 --dbpath=/opt/shard/replset/rs1/data --logpath=/opt/shard/replset/rs1/log/rs1.log --fork --port 20001 --logappend --bind_ip_all

5.在其中一台初始化Shard Server副本集

192.168.56.81:
mongo --port 20001

use admin

config = {_id: 'rs1', members: [
{_id: 0, host: '192.168.56.81:20001'},
{_id: 1, host: '192.168.56.82:20001'},
{_id: 2, host: '192.168.56.83:20001', 'arbiterOnly':true}]}

rs.initiate(config)

6.重复第4,5步

注意修改 rs1 --> rs2, rs3
注意修改 20001 --> 20002, 20003

7.登陆mongos路由

192.168.56.81:
mongo --port 20004

use admin

db.runCommand({"addshard":"rs1/192.168.56.81:20001,192.168.56.82:20001,192.168.56.83:20001"});
db.runCommand({"addshard":"rs2/192.168.56.81:20002,192.168.56.82:20002,192.168.56.83:20002"});
db.runCommand({"addshard":"rs3/192.168.56.81:20003,192.168.56.82:20003,192.168.56.83:20003"});

激活分片
db.runCommand({"enableSharding":"test"}); #test是数据库名字
db.runCommand({"shardCollection":"test.students",key:{name:1}}); #test.students是集合名字

8.查看分片的状态

db.printShardingStatus()

9.验证分片情况

for (var x=1; x<200000; x++) {
db.students.insert({"name":"fuckmongo - " + x,"stuid":x});
}

for (var x=1; x<200000; x++) {
db.students.insert({"name":"lovemongo - " + x,"stuid":x});
}

for (var x=1; x<200000; x++) {
db.students.insert({"name":"hatemongo - " + x,"stuid":x});
}

for (var x=1; x<2000000; x++) {
db.students.insert({"name":"moremongo - " + x,"stuid":x});
}

rs.status()
db.students.stats()