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MongoDB Shard Cluster

ds 2025/5/9 7:44:13

# MongoDB Shard Cluster
集群规划
132上面单独安装mongos
在 1,2,3上面安装shard1和config
在 4,5,6上面安装shard2
节点host如下
172.20.192.20 member1.blockin.ai
172.20.192.21 member2.blockin.ai
172.20.192.31 member3.blockin.ai
172.20.192.32 member4.blockin.ai
172.20.192.33 member5.blockin.ai
172.20.192.34 member6.blockin.ai
172.20.192.132 mongos1.blockin.ai
TODO
172.20.192.22 member7.blockin.ai
172.20.192.23 member8.blockin.ai
172.20.192.56 member9.blockin.ai

172.20.192.57 member10.blockin.ai

# 分片用的复制集在1,2,3
mongod --bind_ip 0.0.0.0 --replSet shard1 --dbpath /data-db/shard1 --logpath /data-db/shard1/mongod.log --port 27010 --fork --shardsvr --wiredTigerCacheSizeGB 1

# 初始化分片
mongo --host member1.blockin.ai:27010 rs.initiate({
_id: "shard1",
"members": [
{
"_id": 0,
"host": "member1.blockin.ai:27010"
},
{
"_id": 1,
"host": "member2.blockin.ai:27010"
},
{
"_id": 2,
"host": "member3.blockin.ai:27010"
}
]
});

# config复制集在1,2,3
mongod --bind_ip 0.0.0.0 --replSet config --dbpath /data-db/config --logpath /data-db/config/mongod.log --port 27019 --fork --configsvr --wiredTigerCacheSizeGB 1

# 初始化
mongo --host member1.blockin.ai:27019 rs.initiate({
_id: "config",
"members": [
{
"_id": 0,
"host": "member1.blockin.ai:27019"
},
{
"_id": 1,
"host": "member2.blockin.ai:27019"
},
{
"_id": 2,
"host": "member3.blockin.ai:27019"
}
]
});

# mongos (对外服务可以多个)
mongos --bind_ip 0.0.0.0 --logpath /data-db/mongos/mongos.log --port 27017 --fork --configdb config/member1.blockin.ai:27019,member2.blockin.ai:27019,member3.blockin.ai:27019

# 创建mongos, 然后添加分片

mongo --host mongos1.blockin.ai:27017
mongos > sh.addShard("shard1/member1.blockin.ai:27010,member2.blockin.ai:27010,member3.blockin.ai:27010");

sh.enableSharding("database")

sh.shardCollection("database.collection", {shardKey: 1})

db // 显示当前数据库的名字
db = db.getSiblingDB("database") // 切换到database数据库

sh.enableSharding("nft")

#分片用的复制集在4,5,6

mongod --bind_ip 0.0.0.0 --replSet shard2 --dbpath /data-db/shard2 --logpath /data-db/shard2/mongod.log --port 27011 --fork --shardsvr --wiredTigerCacheSizeGB 1

# 初始化分片

mongo --host member4.blockin.ai:27011

mongo --host member4.blockin.ai:27011 rs.initiate({
_id: "shard2",
"members": [
{
"_id": 0,
"host": "member4.blockin.ai:27011"
},
{
"_id": 1,
"host": "member5.blockin.ai:27011"
},
{
"_id": 2,
"host": "member6.blockin.ai:27011"
}
]
});

# 加入第二个分片
# 连接到mongos, 添加分片
mongo --host member1.blockin.ai:27017

mongos > sh.addShard("shard2/member4.blockin.ai:27011,member5.blockin.ai:27011,member6.blockin.ai:27011");

mongos > sh.status()

```shell
#!/bin/bash
# 创建目录

mkdir -p /data-db/shard1/ # 分片1
mkdir -p /data-db/shard2/ # 分片2
mkdir -p /data-db/config/ # 配置

# 下载并解压mongodb
cd /data-db/
wget https://fastdl.mongodb.org/linux/mongodb-linux-x86_64-ubuntu2004-4.4.22.tgz && tar -zxvf mongodb-linux-x86_64-ubuntu2004-4.4.22.tgz && mv mongodb-linux-x86_64-ubuntu2004-4.4.22 mongodb

# 创建系统用户用于安装运行 mongodb
useradd -r -s /bin/false mongodb
# 把上面创建的目录授权给这个用户
chown -R mongodb:mongodb /data-db/mongodb
chown -R mongodb:mongodb /data-db/shard1
chown -R mongodb:mongodb /data-db/shard2
chown -R mongodb:mongodb /data-db/config

# 修改hosts文件
echo "172.20.192.20 member1.blockin.ai " >> /etc/hosts
echo "172.20.192.21 member2.blockin.ai " >> /etc/hosts
echo "172.20.192.31 member3.blockin.ai " >> /etc/hosts
echo "172.20.192.32 member4.blockin.ai " >> /etc/hosts
echo "172.20.192.33 member5.blockin.ai " >> /etc/hosts
echo "172.20.192.34 member6.blockin.ai " >> /etc/hosts

# 增加/data-db/mongodb到环境变量
echo "export PATH=\$PATH:/data-db/mongodb/bin" >> ~/.bashrc
source ~/.bashrc

```

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