环境准备
Liunx 服务器一台
以下示例为单机版安装集群, 没有分片
MongoDB 安装
1.下载 MongoDB tgz 安装包：
可以从下载中心下载：
https://www.mongodb.com/download-center#production
Shell：
wget https://fastdl.mongodb.org/linux/mongodb-linux-x86_64-amazon2-4.0.1.tgz
2.解压缩下载的压缩文件
使用下面的命令解压缩刚才下载的文件
tar -zxvf mongodb-linux-*-4.0.1.tgz
3.添加路径到环境变量
打开 /etc/profile ，然后添加下面的脚本进去：
export PATH=<mongodb-install-directory>/bin:$PATH
为你的程序安装目录，然后刷新环境变量：
source /etc/profile
集群搭建
1.为每个实例创建目录
创建文件夹：
mkdir -p /opt/mongodb/rs0-0 /opt/mongodb/rs0-1 /opt/mongodb/rs0-2
2.创建配置文件
切换到 rs0-0 目录中，创建配置文件touch mongod.conf，内容为：
#mongod.confsystemLog: destination: file logAppend: true path: /opt/mongodb/rs0-0/logs/mongodb.log storage: dbPath: /opt/mongodb/rs0-0/data journal: enabled: trueprocessManagement: fork: true # fork and run in background pidFilePath: /opt/mongodb/rs0-0/mongod.pid # location of pidfile timeZoneInfo: /usr/share/zoneinfonet: port: 27017 bindIp: 0.0.0.0 # Listen to local interface only, comment to listen on all interfaces.replication: replSetName: rs0
切换到 rs0-1 目录中，创建配置文件touch mongod.conf，内容为：
#mongod.confsystemLog: destination: file logAppend: true path: /opt/mongodb/rs0-1/logs/mongodb.log storage: dbPath: /opt/mongodb/rs0-1/data journal: enabled: trueprocessManagement: fork: true # fork and run in background pidFilePath: /opt/mongodb/rs0-1/mongod.pid # location of pidfile timeZoneInfo: /usr/share/zoneinfonet: port: 27018 bindIp: 0.0.0.0 # Listen to local interface only, comment to listen on all interfaces.replication: replSetName: rs0
切换到 rs0-2 目录中，创建配置文件touch mongod.conf，内容为：
#mongod.confsystemLog: destination: file logAppend: true path: /opt/mongodb/rs0-2/logs/mongodb.log storage: dbPath: /opt/mongodb/rs0-2/data journal: enabled: trueprocessManagement: fork: true # fork and run in background pidFilePath: /opt/mongodb/rs0-2/mongod.pid # location of pidfile timeZoneInfo: /usr/share/zoneinfonet: port: 27019 bindIp: 0.0.0.0 # Listen to local interface only, comment to listen on all interfaces.replication: replSetName: rs0
3.启动实例
实例0：
mongod --replSet rs0 --port 27017 --bind_ip localhost,192.168.1.11 --dbpath /opt/mongodb/rs0-0 --smallfiles --oplogSize 128
实例1：
mongod --replSet rs0 --port 27018 --bind_ip localhost,192.168.1.11 --dbpath /opt/mongodb/rs0-1 --smallfiles --oplogSize 128
实例2：
mongod --replSet rs0 --port 27019 --bind_ip localhost,192.168.1.11 --dbpath /opt/mongodb/rs0-2 --smallfiles --oplogSize 128
4.配置集群
启动起来之后，使用mongo客户端命令切换到其中一个实例上
mongo --port 27017
然后在 Mongo shell中输入：
rsconf = { _id: "rs0", members: [
{ _id: 0, host: "<hostname>:27017"
},
{ _id: 1, host: "<hostname>:27018"
},
{ _id: 2, host: "<hostname>:27019"
}
]
}替换为你的主机名或者ip地址，然后执行：
rs.initiate( rsconf )
输入 rs.conf() 来查看你的集群信息：
{
"_id": "rs0",
"version": 1,
"protocolVersion": NumberLong(1),
"writeConcernMajorityJournalDefault": true,
"members": [
{
"_id": 0,
"host": "<hostname>:27017",
"arbiterOnly": false,
"buildIndexes": true,
"hidden": false,
"priority": 1,
"tags": {},
"slaveDelay": NumberLong(0),
"votes": 1
},
{
"_id": 1,
"host": "<hostname>:27018",
"arbiterOnly": false,
"buildIndexes": true,
"hidden": false,
"priority": 1,
"tags": {},
"slaveDelay": NumberLong(0),
"votes": 1
},
{
"_id": 2,
"host": "<hostname>:27019",
"arbiterOnly": false,
"buildIndexes": true,
"hidden": false,
"priority": 1,
"tags": {},
"slaveDelay": NumberLong(0),
"votes": 1
}
],
"settings": {
"chainingAllowed": true,
"heartbeatIntervalMillis": 2000,
"heartbeatTimeoutSecs": 10,
"electionTimeoutMillis": 10000,
"catchUpTimeoutMillis": -1,
"catchUpTakeoverDelayMillis": 30000,
"getLastErrorModes": {},
"getLastErrorDefaults": {
"w": 1,
"wtimeout": 0
},
"replicaSetId": ObjectId("5b7412b72362045708008077")
}
}原文出处：https://www.cnblogs.com/savorboard/p/mongodb-4-cluster-install.html