MongoDB6.0.6 副本集搭建（CentOs8）

本文只说如何操作配置副本集，历程艰难，官网文档看了半天也只说了怎么添加单个，没有给出来一个完整的流程。

1.第一步安装，参考前一篇安装即可。

配置三台虚拟机：

192.168.182.142

192.168.182.143

192.168.182.144

还需要安装mongosh,安装了的可以忽略：

安装步骤如下：

1.配置repo

[mongodb-org-6.0]
name=MongoDB Repository
baseurl=https://repo.mongodb.org/yum/redhat/$releasever/mongodb-org/6.0/$basearch/
gpgcheck=1
enabled=1
gpgkey=https://www.mongodb.org/static/pgp/server-6.0.asc

2. 安装

yum install -y mongodb-mongosh
 
 执行
 mongosh 

2.第二步启用副本，在配置文件中添加 replSet=rs1

#指定数据库路径
dbpath=/usr/local/mongodb/data
#指定MongoDB日志文件
logpath=/usr/local/mongodb/logs/mongodb.log
# 使用追加的方式写日志
logappend=true
#端口号
port=27017 
#方便外网访问,外网所有ip都可以访问，不要写成固定的linux的ip
bind_ip=0.0.0.0
fork=true # 以守护进程的方式运行MongoDB，创建服务器进程
auth=false #启用用户验证

#启用日志文件
journal=true
#以后台方式运行进程

replSet=rs1
pidfilepath=/usr/local/mongodb/pid/main.pid

不添加 replSet=rs1， 初始化副本的时候会报错：MongoServerError: This node was not started with replication enabled.

配置添修改完成之后，重启三个节点。

3.第三步初始化副本集

登录任意一节点，执行 rs.initiate

rs.initiate({_id:"rs1",members:[{_id:0,host:"192.168.182.142:27017",priority:2},{_id:1,host:"192.168.182.143:27017",priority:1},{_id:2,host:"192.168.182.144:27017",arbiterOnly:true}]})

不用切换db，也不用授权直接在test下执行

 过了一会之后，节点显示都变了

查看rs信息

rs.status() 

{
  set: 'rs1',date: ISODate("2023-06-03T14:43:17.576Z"),myState: 1,term: Long("1"),syncSourceHost: '',syncSourceId: -1,heartbeatIntervalMillis: Long("2000"),majorityVoteCount: 2,writeMajorityCount: 2,votingMembersCount: 3,writableVotingMembersCount: 2,optimes: {
    lastCommittedOpTime: { ts: Timestamp({ t: 1685803395,i: 1 }),t: Long("1") },lastCommittedWallTime: ISODate("2023-06-03T14:43:15.072Z"),readConcernMajorityOpTime: { ts: Timestamp({ t: 1685803395,appliedOpTime: { ts: Timestamp({ t: 1685803395,durableOpTime: { ts: Timestamp({ t: 1685803395,lastAppliedWallTime: ISODate("2023-06-03T14:43:15.072Z"),lastDurableWallTime: ISODate("2023-06-03T14:43:15.072Z")
  },lastStableRecoveryTimestamp: Timestamp({ t: 1685803355,electionCandidateMetrics: {
    lastElectionReason: 'electionTimeout',lastElectionDate: ISODate("2023-06-03T14:16:54.917Z"),electionTerm: Long("1"),lastCommittedOpTimeAtElection: { ts: Timestamp({ t: 1685801804,t: Long("-1") },lastSeenOpTimeAtElection: { ts: Timestamp({ t: 1685801804,numVotesNeeded: 2,priorityAtElection: 2,electionTimeoutMillis: Long("10000"),numCatchUpOps: Long("0"),newTermStartDate: ISODate("2023-06-03T14:16:54.942Z"),wMajorityWriteAvailabilityDate: ISODate("2023-06-03T14:16:55.696Z")
  },members: [
    {
      _id: 0,name: '192.168.182.142:27017',health: 1,state: 1,stateStr: 'PRIMARY',uptime: 1792,optime: { ts: Timestamp({ t: 1685803395,optimeDate: ISODate("2023-06-03T14:43:15.000Z"),lastDurableWallTime: ISODate("2023-06-03T14:43:15.072Z"),infoMessage: '',electionTime: Timestamp({ t: 1685801814,electionDate: ISODate("2023-06-03T14:16:54.000Z"),configVersion: 1,configTerm: 1,self: true,lastHeartbeatMessage: ''
    },{
      _id: 1,name: '192.168.182.143:27017',state: 2,stateStr: 'SECONDARY',uptime: 1593,optimeDurable: { ts: Timestamp({ t: 1685803395,optimeDurableDate: ISODate("2023-06-03T14:43:15.000Z"),lastHeartbeat: ISODate("2023-06-03T14:43:16.044Z"),lastHeartbeatRecv: ISODate("2023-06-03T14:43:16.865Z"),pingMs: Long("0"),lastHeartbeatMessage: '',syncSourceHost: '192.168.182.142:27017',syncSourceId: 0,configTerm: 1
    },{
      _id: 2,name: '192.168.182.144:27017',state: 7,stateStr: 'ARBITER',lastHeartbeat: ISODate("2023-06-03T14:43:16.043Z"),lastHeartbeatRecv: ISODate("2023-06-03T14:43:15.901Z"),configTerm: 1
    }
  ],ok: 1,'$clusterTime': {
    clusterTime: Timestamp({ t: 1685803395,signature: {
      hash: Binary(Buffer.from("0000000000000000000000000000000000000000","hex"),0),keyId: Long("0")
    }
  },operationTime: Timestamp({ t: 1685803395,i: 1 })
}

添加新节点

1.安装新节点，和之前的安装相同，配置文件也要相同，必须设置replSet=rs1，才能添加

登录主节点添加节点

rs.add("192.168.182.145:27017")

rs1 [direct: primary] test> rs.add("192.168.182.145:27017")
{
  ok: 1,'$clusterTime': {
    clusterTime: Timestamp({ t: 1685845557,operationTime: Timestamp({ t: 1685845557,i: 1 })
}
rs1 [direct: primary] test> 

rs.status() 查看状态

{
      _id: 3,name: '192.168.182.145:27017',uptime: 121,optime: { ts: Timestamp({ t: 1685845677,t: Long("4") },optimeDurable: { ts: Timestamp({ t: 1685845677,optimeDate: ISODate("2023-06-04T02:27:57.000Z"),optimeDurableDate: ISODate("2023-06-04T02:27:57.000Z"),lastAppliedWallTime: ISODate("2023-06-04T02:27:57.408Z"),lastDurableWallTime: ISODate("2023-06-04T02:27:57.408Z"),lastHeartbeat: ISODate("2023-06-04T02:27:57.814Z"),lastHeartbeatRecv: ISODate("2023-06-04T02:27:57.810Z"),syncSourceHost: '192.168.182.143:27017',syncSourceId: 1,configVersion: 4,configTerm: 4
    },

主节点创建的集合也自动同步过来了

 

 

副本集配置遇到问题：

1.MongoServerError: not authorized on admin to execute command

        此错误是因为没有授权给admin用户对system.version表执行命令的权限，解决方法如下: > db.grantRolesToUser ( "root",[ { role: "__system",db: "admin" } ] )

2.MongoServerError: replSetInitiate quorum check failed because not all proposed set members responded affirmatively: 192.168.182.144:27017 failed with Authentication failed.,192.168.182.143:27017 failed with Authentication failed

这个错误是因为开了权限校验，导致在初始化的时候验证失败，本次成功就是因为关闭了校验

参考:

MongoDB 6.0.3副本集搭建_ITPUB博客

原文地址：https://blog.csdn.net/jingyu333/article/details/131015460