1.前置条件（官方推荐生产环境使用此种）

To avoid configuration updates due to IP address changes, use DNS hostnames instead of IP addresses. It is particularly important to use a DNS hostname instead of an IP address when configuring replica set members or sharded cluster members.

Use hostnames instead of IP addresses to configure clusters across a split network horizon. Starting in MongoDB 5.0, nodes that are only configured with an IP address will fail startup validation and will not start.

2.配置 Config Server

配置成副本集模式。config1，config2，config3

2.1创建文件夹

mkdir -p /data/dbs/config1/data
mkdir -p /data/dbs/config1/logs

2.2 vim /data/dbs/config1/mongod.conf

systemLog:
  destination: file
  logAppend: true
  path: /data/dbs/config1/logs/mongod.log


storage:
  dbPath: /data/dbs/config1/data
  journal:
    enabled: true


processManagement:
  fork: true  
  pidFilePath: /data/dbs/config1/mongod.pid  



net:
  port: 27018
  bindIp: 0.0.0.0

sharding:
  clusterRole: configsvr

replication:
  replSetName: config

2.3启动

/home/mongodb/mongodb/bin/mongod -f /data/dbs/config1/mongod.conf
/home/mongodb/mongodb/bin/mongod -f /data/dbs/config2/mongod.conf
/home/mongodb/mongodb/bin/mongod -f /data/dbs/config3/mongod.conf

2.4 初始化

/home/mongodb/mongodb/bin/mongo --port 27018

rs.initiate(
  {
    _id: "config",
    configsvr: true,
    members: [
      { _id : 0, host : "10.6.8.176:27018" },
      { _id : 1, host : "10.6.8.176:27028" },
      { _id : 2, host : "10.6.8.176:27038" }
    ]
  }
)

3.配置Shard

配置成副本集模式。shard1，shard2，shard3

3.1创建文件夹

mkdir -p /data/dbs/shard1/data
mkdir -p /data/dbs/shard1/logs

3.2 vim /data/dbs/config1/mongod.conf

systemLog:
  destination: file
  logAppend: true
  path: /data/dbs/shard1/logs/mongod.log


storage:
  dbPath: /data/dbs/shard1/data
  journal:
    enabled: true


processManagement:
  fork: true  
  pidFilePath: /data/dbs/shard1/mongod.pid 


net:
  port: 27019
  bindIp: 0.0.0.0

sharding:
  clusterRole: shardsvr

replication:
  replSetName: shard1

3.3 启动

/home/mongodb/mongodb/bin/mongod -f /data/dbs/shard1/mongod.conf
/home/mongodb/mongodb/bin/mongod -f /data/dbs/shard2/mongod.conf
/home/mongodb/mongodb/bin/mongod -f /data/dbs/shard3/mongod.conf

3.4 初始化

shard1

/home/mongodb/mongodb/bin/mongo --port 27019

rs.initiate(
  {
    _id: "shard1",
    members: [
      { _id : 0, host : "10.6.8.176:27019" }
    ]
  }
)

shard2

/home/mongodb/mongodb/bin/mongo --port 27020

rs.initiate(
  {
    _id: "shard2",
    members: [
      { _id : 0, host : "10.6.8.176:27020" }
    ]
  }
)

shard3

/home/mongodb/mongodb/bin/mongo --port 27021

rs.initiate(
  {
    _id: "shard3",
    members: [
      { _id : 0, host : "10.6.8.176:27021" }
    ]
  }
)

4. 配置mongos-router

配置成副本集模式或者单个都可以。

4.1 创建文件夹

mkdir -p /data/dbs/router1/data
mkdir -p /data/dbs/router1/logs

4.2 vim /data/dbs/router1/mongod.conf

systemLog:
  destination: file
  logAppend: true
  path: /data/dbs/router1/logs/mongod.log


storage:
  dbPath: /data/dbs/router1/data
  journal:
    enabled: true


processManagement:
  fork: true  
  pidFilePath: /data/dbs/router1/mongod.pid 


net:
  port: 27017
  bindIp: 0.0.0.0

sharding:
  configDB: config/10.6.8.186:27018

4.3 启动

/home/mongodb/mongodb/bin/mongos -f /data/dbs/router1/mongod.conf

4.4 初始化

/home/mongodb/mongodb/bin/mongo --port 27017

sh.addShard( "shard1/10.6.8.176:27019")
sh.addShard( "shard2/10.6.8.176:27020")
sh.addShard( "shard3/10.6.8.176:27021")

4.5 删除分片

db.runCommand( { removeShard: "shard1" } )

db.adminCommand( { removeShard : "shard1" } )

5.验证分片

/home/mongodb/mongodb/bin/mongo --port 27017

5.1为集合启用分片,设置分片规则

use db0001;
sh.enableSharding("db0001")
sh.shardCollection("db0001.student", {"_id": "hashed" })

5.2插入数据

for (i = 1; i <= 1000; i=i+1){
    db.student.insert({'xh': i,'name':'name'+i})
}

5.3查看各分片数量

/home/mongodb/mongodb/bin/mongo --port 27029
/home/mongodb/mongodb/bin/mongo --port 27020
/home/mongodb/mongodb/bin/mongo --port 27021

use db0001;
db.student.find().count()