mongodb集群至少需要三个节点，master(主),slaver(副),arbiter(仲裁者)，由于我没有3台服务器，所以将三个节点都部署在一台服务器上。
1.首先下载安装包（mongodb-windows-x86_64-5.0.2-signed.msi）安装，mongodb的默认安装是在C盘的，安装过程中会让用户选择data和log得到存放路径，可以选择其他盘符，如下图所示
然后这里有个bin文件夹，里面有很多操作MongoDb的工具，如果不想安装在C盘，卸载命令如下
命令为.\mongod.exe --remove --serviceName (mongodb),这里需要管理员模式打开cmd或者PowerShell,注意这种方式默认读取的配置是当前bin文件夹下的mongod.cfg文件的内容。
# mongod.conf
# for documentation of all options, see:
# http://docs.mongodb.org/manual/reference/configuration-options/
# Where and how to store data.
storage:
dbPath: D:\Program Files\MongoDB\Server\5.0\data
journal:
enabled: true
# engine:
# wiredTiger:
# where to write logging data.
systemLog:
destination: file
logAppend: true
path: D:\Program Files\MongoDB\Server\5.0\log\mongod.log
# network interfaces
net:
port: 27017
bindIp: 127.0.0.1
#processManagement:
#security:
#operationProfiling:
#replication:
#sharding:
## Enterprise-Only Options:
#auditLog:
#snmp:
配置文件是安装包默认为我们生成好的，其中dbpath和systemlogpath是用户选择的存放路径。
分别复制三个文件夹，名字随便取
每个文件夹下有如右侧所示的文件夹和配置文件，其中data文件夹用于存放mongodb产生的文档，log存放日志，mongod1.cfg为配置文件
# mongod.conf
# for documentation of all options, see:
# http://docs.mongodb.org/manual/reference/configuration-options/
# Where and how to store data.
storage:
dbPath: D:\Program Files\MongoDB\Server\Mongo-Master\data
journal:
enabled: true
# engine:
# mmapv1:
# wiredTiger:
# where to write logging data.
systemLog:
destination: file
logAppend: true
path: D:\Program Files\MongoDB\Server\Mongo-Master\log\mongod.log
# network interfaces
net:
port: 27017
bindIp: 0.0.0.0
bindIpAll: true
# 集群设置
replication:
replSetName: rs0
#processManagement:
#security:
#operationProfiling:
#replication:
#sharding:
## Enterprise-Only Options:
#auditLog:
#snmp:
然后执行安装命令
.\mongod.exe --config "D:\Program Files\MongoDB\Server\Mongo-Master\mongod1.cfg" --install --serviceName Mongodb-Master --serviceDisplayName Mongodb-Master
执行成功即可看到服务已经注册成功，按项目的步骤在执行安装slave和arbiter，
.\mongo.exe --host 127.0.0.1:27017进入其中一个节点
use admin切换到admin用户
设置config，config={_id:"rs0", members:[{_id:0, host:"127.0.0.1:27017",priority:2},{_id:1, host:"127.0.0.1:27018",priority:1},{_id:2,host:"127.0.0.1:27019",arbiterOnly:true}]}，
然后执行rs.initiate(config)
执行成功查看集群状态rs.status()
rs0:SECONDARY> rs.status()
{
"set" : "rs0",
"date" : ISODate("2021-09-06T16:31:44.896Z"),
"myState" : 2,
"term" : NumberLong(0),
"syncSourceHost" : "",
"syncSourceId" : -1,
"heartbeatIntervalMillis" : NumberLong(2000),
"majorityVoteCount" : 2,
"writeMajorityCount" : 2,
"votingMembersCount" : 3,
"writableVotingMembersCount" : 2,
"optimes" : {
"lastCommittedOpTime" : {
"ts" : Timestamp(0, 0),
"t" : NumberLong(-1)
},
"lastCommittedWallTime" : ISODate("1970-01-01T00:00:00Z"),
"appliedOpTime" : {
"ts" : Timestamp(1630945897, 1),
"t" : NumberLong(-1)
},
"durableOpTime" : {
"ts" : Timestamp(1630945897, 1),
"t" : NumberLong(-1)
},
"lastAppliedWallTime" : ISODate("2021-09-06T16:31:37.157Z"),
"lastDurableWallTime" : ISODate("2021-09-06T16:31:37.157Z")
},
"lastStableRecoveryTimestamp" : Timestamp(0, 0),
"members" : [
{
"_id" : 0,
"name" : "127.0.0.1:27017",
"health" : 1,
"state" : 2,
"stateStr" : "PRIMARY",
"uptime" : 88,
"optime" : {
"ts" : Timestamp(1630945897, 1),
"t" : NumberLong(-1)
},
"optimeDate" : ISODate("2021-09-06T16:31:37Z"),
"syncSourceHost" : "",
"syncSourceId" : -1,
"infoMessage" : "",
"configVersion" : 1,
"configTerm" : 0,
"self" : true,
"lastHeartbeatMessage" : ""
},
{
"_id" : 1,
"name" : "127.0.0.1:27018",
"health" : 1,
"state" : 2,
"stateStr" : "SECONDARY",
"uptime" : 7,
"optime" : {
"ts" : Timestamp(1630945897, 1),
"t" : NumberLong(-1)
},
"optimeDurable" : {
"ts" : Timestamp(1630945897, 1),
"t" : NumberLong(-1)
},
"optimeDate" : ISODate("2021-09-06T16:31:37Z"),
"optimeDurableDate" : ISODate("2021-09-06T16:31:37Z"),
"lastHeartbeat" : ISODate("2021-09-06T16:31:44.678Z"),
"lastHeartbeatRecv" : ISODate("2021-09-06T16:31:44.776Z"),
"pingMs" : NumberLong(0),
"lastHeartbeatMessage" : "",
"syncSourceHost" : "",
"syncSourceId" : -1,
"infoMessage" : "",
"configVersion" : 1,
"configTerm" : 0
},
{
"_id" : 2,
"name" : "127.0.0.1:27019",
"health" : 1,
"state" : 7,
"stateStr" : "ARBITER",
"uptime" : 7,
"lastHeartbeat" : ISODate("2021-09-06T16:31:44.678Z"),
"lastHeartbeatRecv" : ISODate("2021-09-06T16:31:43.702Z"),
"pingMs" : NumberLong(0),
"lastHeartbeatMessage" : "",
"syncSourceHost" : "",
"syncSourceId" : -1,
"infoMessage" : "",
"configVersion" : 1,
"configTerm" : 0
}
],
"ok" : 1,
"$clusterTime" : {
"clusterTime" : Timestamp(1630945897, 1),
"signature" : {
"hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
"keyId" : NumberLong(0)
}
},
"operationTime" : Timestamp(1630945897, 1)
}
rs0:SECONDARY>
可以看到有三种状态的节点 Primary Secondary Arbiter
后面我们就可以愉快的利用MongoDb玩耍了！
原文：https://www.cnblogs.com/helloworld-wang/p/15236443.html