MongoDB 4.2 副本集群及分片集群搭建
一、环境准备
系统版本：Centos 7
软件版本：MongoDB 4.2
关闭防火墙及selinux
#systemctl stop firewalld.service
#setenforce 0
二、角色规划
172.22.12.10 172.22.12.11 172.22.12.12
mongos(27020) mongos(27020) mongos(27020)
Config(27019) Config(27019) Config(27019)
Shard1主节点(27016) Shard1副节点(27016) Shard1仲裁节点(27016)
Shard2仲裁节点(27017) Shard2主节点(27017) Shard2副节点(27017)
Shard3副节点(27018) Shard3仲裁节点(27018) Shard3主节点(27018)
三、MongoDB4.2的安装
（一）添加安装源
#vi /etc/yum.repos.d/mongodb-org-4.2.repo
添加如下内容：
[mongodb-org-4.2] name=MongoDB Repository
baseurl=https://repo.mongodb.org/yum/redhat/$releasever/mongodb-org/4.2/x86_64/
gpgcheck=1 enabled=1
gpgkey=https://www.mongodb.org/static/pgp/server-4.2.asc
Esc+wq!保存
（二）安装MongoDB 4.2
#sudo yum install -y mongodb-org-4.2.0 mongodb-org-server-4.2.0 mongodb-org-shell-4.2.0 mongodb-org-mongos-4.2.0 mongodb-org-tools-4.2.0
验证安装版本
#mongo --version
查看安装文件相应目录
#whereis mongo
mongo: /usr/bin/mongo /usr/share/man/man1/mongo.1
关闭系统自启动服务 mongod.service //切记一定要关，不然以后会有大麻烦
（三）创建文件目录
日志目录：
#mkdir -p /senscom/mongodb/logs
#touch /senscom/mongodb/logs/mongod{000,001,002}.log
#touch /senscom/mongodb/logs/csvr.log
存储目录：
#mkdir -p /senscom/mongodb/data/{000,001,002,csvr}
创建配置文件目录：
#mkdir -p /senscom/mongodb/config
配置目录权限：
# chmod 777 /senscom/mongodb/logs/*.log
# chown -R mongod.mongod /senscom/mongodb
# echo "PATH=/usr/bin/mongo/bin:$PATH" >> /etc/profile
# source /etc/profile
四、Config服务器配置
分别登陆三台服务器操作
#vi /senscom/mongodb/config/csvr.yaml
systemLog:
destination: file
path: "/senscom/mongodb/logs/csvr.log"
logAppend: true
storage:
journal:
enabled: true
dbPath: "/senscom/mongodb/data/csvr"
directoryPerDB: true
wiredTiger:
engineConfig:
cacheSizeGB: 1
directoryForIndexes: true
collectionConfig:
blockCompressor: zlib
indexConfig:
prefixCompression: true
net:
bindIp: 0.0.0.0
port: 27019
replication:
oplogSizeMB: 2048
replSetName: csvr
sharding:
clusterRole: configsvr
processManagement:
fork: true
Esc+wq!保存
在主机上执行该文件
#mongod -f /senscom/mongodb/config/csvr.yaml
看一下跑起来没有
#netstat -tulnp
#ps aux|grep mongo
五、副本集群服务配置
（一）创建配置文件
分别登陆三台服务器
#vi /senscom/mongodb/config/mongod000.yaml
systemLog:
destination: file
path: "/senscom/mongodb/logs/mongod000.log"
logAppend: true
storage:
journal:
enabled: true
dbPath: "/senscom/mongodb/data/000"
processManagement:
fork: true
net:
bindIp: 0.0.0.0
port: 27016
setParameter:
enableLocalhostAuthBypass: false
replication:
replSetName: "rs000"
sharding:
clusterRole: shardsvr
Esc+wq!保存
#vi /senscom/mongodb/config/mongod001.yaml
systemLog:
destination: file
path: "/senscom/mongodb/logs/mongod001.log"
logAppend: true
storage:
journal:
enabled: true
dbPath: "/senscom/mongodb/data/001"
processManagement:
fork: true
net:
bindIp: 0.0.0.0
port: 27017
setParameter:
enableLocalhostAuthBypass: false
replication:
replSetName: "rs001"
sharding:
clusterRole: shardsvr
Esc+wq!保存
#vi /senscom/mongodb/config/mongod002.yaml
systemLog:
destination: file
path: "/senscom/mongodb/logs/mongod002.log"
logAppend: true
storage:
journal:
enabled: true
dbPath: "/senscom/mongodb/data/002"
processManagement:
fork: true
net:
bindIp: 0.0.0.0
port: 27018
setParameter:
enableLocalhostAuthBypass: false
replication:
replSetName: "rs002"
sharding:
clusterRole: shardsvr
Esc+wq!保存
（二）初始化副本集
启动副本集，在每台机器上都执行
#mongod -f /senscom/mongodb/config/mongod000.yaml
#mongod -f /senscom/mongodb/config/mongod001.yaml
#mongod -f /senscom/mongodb/config/mongod002.yaml
任意一台机器执行,进去到mongo shell
#mongo -prot 27016
在mongo shell中执行
rs.initiate( { _id : “rs000”, members: [
{ _id: 0, host: “172.22.12.10:27016” },
{ _id: 1, host: “172.22.12.11:27016” },
{ _id: 2, host: “172.22.12.12:27016” } ]})
任意一台机器执行,进去到mongo shell
#mongo -prot 27017
在mongo shell中执行
rs.initiate( { _id : “rs001”, members: [
{ _id: 0, host: “172.22.12.10:27017” },
{ _id: 1, host: “172.22.12.11:27017” },
{ _id: 2, host: “172.22.12.12:27017” } ]})
任意一台机器执行,进去到mongo shell
#mongo -prot 27018
在mongo shell中执行
rs.initiate( { _id : “rs002”, members: [
{ _id: 0, host: “172.22.12.10:27018” },
{ _id: 1, host: “172.22.12.11:27018” },
{ _id: 2, host: “172.22.12.12:27018” } ]})
六、路由服务器配置
分别登陆三台服务器
#vi /senscom/mongodb/config/mongos.yaml
systemLog:
destination: file
path: "/senscom/mongodb/logs/mongos000.log"
logAppend: true
net:
bindIp: 0.0.0.0
port: 27020
sharding:
configDB: csvr/172.22.12.10:27019,172.22.12.11:27019,172.22.12.12:27019
processManagement:
fork: true
Esc+wq!保存
在主机上执行该文件
#mongos -f /senscom/mongodb/config/mongos.yaml
看一下跑起来没有
#netstat -tulnp
#ps aux|grep mongo
七、分片集群服务配置
登录到mongos
任意一台主机执行都可以,当前在172.22.12.10上执行
#mongo --host 172.22.12.10 --port 27020
> use admin
> db.runCommand( { addshard :"rs000/172.22.12.10:27016,172.22.12.11:27016,172.22.12.12:27016",name:"shard1"} )
> db.runCommand( { addshard :"rs001/172.22.12.10:27017,172.22.12.11:27017,172.22.12.12:27017",name:"shard2"} )
此处先添加两各分片服务器，还有一个，待会添加
查看群集状态
mongos> sh.status()
添加新的分片
>db.runCommand( { addshard : "rs002/172.22.12.10:27018,172.22.12.11:27018,172.22.12.12:27018",name:"shard3"} )
查看群集状态
mongos> sh.status()
移除分片
db.runCommand( { removeshard: "your_shard_name" } )
八、功能测试
在mongo shell中,这里设置一个测试数据库,用来测试功能.
>db.runCommand( { enablesharding : "testdb" } )
>db.runCommand( { shardcollection : "testdb.users",key : {id: 1} } )
创建测试数据,用来测试分片功能,下面的代码向数据库中插入了200w条数据,由于数据量比较大,所以批量插入的时候,时间会稍微有点久.
>var arr=[];for(var i=0;i<2000000;i++){var uid = i;var name = "mongodb"+i;arr.push({"id":uid,"name":name});}
>db.users.insertMany(arr);
查询状态
通过sh.status()函数查看当前分片的状态
查看副本集的状态通过rs.status()