MongoDB副本集搭建

一、安装mongodb服务

      1、下载mongodb二进制包，解压，移动到/usr/local/下。

　　下载地址：https://www.mongodb.com/try/download/community

tar zxf mongodb-linux-x86_64-rhel70-4.4.17.tgz
mv mongodb-linux-x86_64-rhel70-4.4.17 /usr/local/mongodb

      

      2、配置环境变量

vim /etc/profile.d/mongo.sh
       #添加以下配置
       export PATH=/usr/local/mongodb/bin:$PATH

#加载环境变量配置
source /etc/profile.d/mongo.sh

 

      3、创建数据目录和日志目录

mkdir  /usr/local/mongodb/data
mkdir /usr/local/mongodb/log

 

      4、创建配置文件

vim /usr/local/mogodb/mogodb.conf
    #添加以下配置
    systemLog:
      destination: file
      logAppend: true
      path: /usr/local/mongodb/log/mongod.log  
    storage:
      dbPath: /usr/local/mongodb/data 
      journal:
        enabled: true
    processManagement:
      fork: true
      pidFilePath: /usr/local/mongodb/mongod.pid
      #timeZoneInfo: /usr/share/zoneinfo
    net:
      port: 27017
      bindIp: 0.0.0.0

 

      5、启动

mongod -f /usr/local/mongodb/mongodb.conf

 

二、配置副本集

    1、在3台服务器上分别安装好mongodb，可以根据上面的步骤，或者去官网了解更多安装方式。

    2、修改3个节点配置文件

vim /usr/local/mongodb/mongodb.conf
      #添加以下配置，3个节点添加配置必须相同
      replication:   
        replSetName: "rs0"

 

 

 

    3、重启3个节点服务

mongod -f /usr/local/mongodb/mongodb.conf  --shutdown
mongod -f /usr/local/mongodb/mongodb.conf 

 

    4、登录任意一个节点mongodb，初始化副本集（主+备+仲裁）。

mongo

> rs.initiate({
... _id: "rs0",
... members: [
... { _id: 0, host: "192.168.1.11:27017" },
... { _id: 1, host: "192.168.1.12:27017" },
... { _id: 2, host: "192.168.1.13:27017", arbiterOnly: true }
... ] })

 

    5、查看集群信息

> rs.status()
{
  "set" : "rs0",
  "date" : ISODate("2022-11-02T08:16:35.330Z"),
  "myState" : 1,
  "term" : NumberLong(1),
  "syncSourceHost" : "",
  "syncSourceId" : -1,
  "heartbeatIntervalMillis" : NumberLong(2000),
  "majorityVoteCount" : 2,
  "writeMajorityCount" : 2,
  "votingMembersCount" : 3,
  "writableVotingMembersCount" : 2,
  "optimes" : {
    "lastCommittedOpTime" : {
      "ts" : Timestamp(1667376986, 1),
      "t" : NumberLong(1)
    },
    "lastCommittedWallTime" : ISODate("2022-11-02T08:16:26.250Z"),
    "readConcernMajorityOpTime" : {
      "ts" : Timestamp(1667376986, 1),
      "t" : NumberLong(1)
    },
    "readConcernMajorityWallTime" : ISODate("2022-11-02T08:16:26.250Z"),
    "appliedOpTime" : {
      "ts" : Timestamp(1667376986, 1),
      "t" : NumberLong(1)
    },
    "durableOpTime" : {
      "ts" : Timestamp(1667376986, 1),
      "t" : NumberLong(1)
    },
    "lastAppliedWallTime" : ISODate("2022-11-02T08:16:26.250Z"),
    "lastDurableWallTime" : ISODate("2022-11-02T08:16:26.250Z")
  },
  "lastStableRecoveryTimestamp" : Timestamp(1667376936, 1),
  "electionCandidateMetrics" : {
    "lastElectionReason" : "electionTimeout",
    "lastElectionDate" : ISODate("2022-11-02T08:03:35.546Z"),
    "electionTerm" : NumberLong(1),
    "lastCommittedOpTimeAtElection" : {
      "ts" : Timestamp(0, 0),
      "t" : NumberLong(-1)
    },
    "lastSeenOpTimeAtElection" : {
      "ts" : Timestamp(1667376204, 1),
      "t" : NumberLong(-1)
    },
    "numVotesNeeded" : 2,
    "priorityAtElection" : 1,
    "electionTimeoutMillis" : NumberLong(10000),
    "numCatchUpOps" : NumberLong(0),
    "newTermStartDate" : ISODate("2022-11-02T08:03:35.557Z"),
    "wMajorityWriteAvailabilityDate" : ISODate("2022-11-02T08:03:36.683Z")
  },
  "members" : [
    {
      "_id" : 0,
      "name" : "192.168.1.11:27017",
      "health" : 1,
      "state" : 1,
      "stateStr" : "PRIMARY",
      "uptime" : 2058,
      "optime" : {
        "ts" : Timestamp(1667376986, 1),
        "t" : NumberLong(1)
      },
      "optimeDate" : ISODate("2022-11-02T08:16:26Z"),
      "lastAppliedWallTime" : ISODate("2022-11-02T08:16:26.250Z"),
      "lastDurableWallTime" : ISODate("2022-11-02T08:16:26.250Z"),
      "syncSourceHost" : "",
      "syncSourceId" : -1,
      "infoMessage" : "",
      "electionTime" : Timestamp(1667376215, 1),
      "electionDate" : ISODate("2022-11-02T08:03:35Z"),
      "configVersion" : 1,
      "configTerm" : 1,
      "self" : true,
      "lastHeartbeatMessage" : ""
    },
    {
      "_id" : 1,
      "name" : "192.168.1.12:27017",
      "health" : 1,
      "state" : 2,
      "stateStr" : "SECONDARY",
      "uptime" : 790,
      "optime" : {
        "ts" : Timestamp(1667376986, 1),
        "t" : NumberLong(1)
      },
      "optimeDurable" : {
        "ts" : Timestamp(1667376986, 1),
        "t" : NumberLong(1)
      },
      "optimeDate" : ISODate("2022-11-02T08:16:26Z"),
      "optimeDurableDate" : ISODate("2022-11-02T08:16:26Z"),
      "lastAppliedWallTime" : ISODate("2022-11-02T08:16:26.250Z"),
      "lastDurableWallTime" : ISODate("2022-11-02T08:16:26.250Z"),
      "lastHeartbeat" : ISODate("2022-11-02T08:16:34.218Z"),
      "lastHeartbeatRecv" : ISODate("2022-11-02T08:16:34.154Z"),
      "pingMs" : NumberLong(0),
      "lastHeartbeatMessage" : "",
      "syncSourceHost" : "192.168.1.11:27017",
      "syncSourceId" : 0,
      "infoMessage" : "",
      "configVersion" : 1,
      "configTerm" : 1
    },
    {
      "_id" : 2,
      "name" : "192.168.1.13:27017",
      "health" : 1,
      "state" : 0,
      "stateStr" : "STARTUP",
      "uptime" : 790,
      "lastHeartbeat" : ISODate("2022-11-02T08:16:34.126Z"),
      "lastHeartbeatRecv" : ISODate("1970-01-01T00:00:00Z"),
      "pingMs" : NumberLong(3),
      "lastHeartbeatMessage" : "",
      "syncSourceHost" : "",
      "syncSourceId" : -1,
      "infoMessage" : "",
      "configVersion" : -2,
      "configTerm" : -1
    }
  ],
  "ok" : 1,
  "$clusterTime" : {
    "clusterTime" : Timestamp(1667376986, 1),
    "signature" : {
      "hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
      "keyId" : NumberLong(0)
    }
  },
  "operationTime" : Timestamp(1667376986, 1)
}