docker 搭建 mongodb5.0.5 副本集

1、在宿主機創造對應的文件夾

mkdir mongo1Data mongo2Data mongo3Data

2、在docker中啓動3個mongo容器

docker network create mongoCluster

docker run -d --rm -p 27018:27017 -v /home/mongo1Data:/data/db --name mongo1 --network mongoCluster mongo mongod --replSet rs0 --bind_ip_all

docker run -d --rm -p 27019:27017 -v /home/mongo2Data:/data/db --name mongo2 --network mongoCluster mongo mongod --replSet rs0 --bind_ip_all

docker run -d --rm -p 27020:27017 -v /home/mongo3Data:/data/db --name mongo3 --network mongoCluster mongo mongod --replSet rs0 --bind_ip_all

3、啓動複製集

docker exec -it mongo1 mongosh --eval "rs.initiate({
 _id: \"rs0\",
 members: [
   {_id: 0, host: \"192.168.100.99:27018\"},
   {_id: 1, host: \"192.168.100.99:27019\"},
   {_id: 2, host: \"192.168.100.99:27020\"}
 ]
})"

ok:1 表示成功

執行docker exec -it mongo1 mongosh --eval "rs.status()" 查看狀態

https://github.com/browserslist/browserslist#browsers-data-updating
{
  set: 'rs0',
  date: ISODate("2022-03-07T07:35:14.990Z"),
  myState: 1,
  term: Long("1"),
  syncSourceHost: '',
  syncSourceId: -1,
  heartbeatIntervalMillis: Long("2000"),
  majorityVoteCount: 2,
  writeMajorityCount: 2,
  votingMembersCount: 3,
  writableVotingMembersCount: 3,
  optimes: {
    lastCommittedOpTime: { ts: Timestamp({ t: 1646638512, i: 1 }), t: Long("1") },
    lastCommittedWallTime: ISODate("2022-03-07T07:35:12.676Z"),
    readConcernMajorityOpTime: { ts: Timestamp({ t: 1646638512, i: 1 }), t: Long("1") },
    appliedOpTime: { ts: Timestamp({ t: 1646638512, i: 1 }), t: Long("1") },
    durableOpTime: { ts: Timestamp({ t: 1646638512, i: 1 }), t: Long("1") },
    lastAppliedWallTime: ISODate("2022-03-07T07:35:12.676Z"),
    lastDurableWallTime: ISODate("2022-03-07T07:35:12.676Z")
  },
  lastStableRecoveryTimestamp: Timestamp({ t: 1646638472, i: 1 }),
  electionCandidateMetrics: {
    lastElectionReason: 'electionTimeout',
    lastElectionDate: ISODate("2022-03-07T07:34:42.614Z"),
    electionTerm: Long("1"),
    lastCommittedOpTimeAtElection: { ts: Timestamp({ t: 1646638472, i: 1 }), t: Long("-1") },
    lastSeenOpTimeAtElection: { ts: Timestamp({ t: 1646638472, i: 1 }), t: Long("-1") },
    numVotesNeeded: 2,
    priorityAtElection: 1,
    electionTimeoutMillis: Long("10000"),
    numCatchUpOps: Long("0"),
    newTermStartDate: ISODate("2022-03-07T07:34:42.661Z"),
    wMajorityWriteAvailabilityDate: ISODate("2022-03-07T07:34:43.826Z")
  },
  members: [
    {
      _id: 0,
      name: '192.168.100.99:27018',
      health: 1,
      state: 1,
      stateStr: 'PRIMARY',
      uptime: 83,
      optime: { ts: Timestamp({ t: 1646638512, i: 1 }), t: Long("1") },
      optimeDate: ISODate("2022-03-07T07:35:12.000Z"),
      lastAppliedWallTime: ISODate("2022-03-07T07:35:12.676Z"),
      lastDurableWallTime: ISODate("2022-03-07T07:35:12.676Z"),
      syncSourceHost: '',
      syncSourceId: -1,
      infoMessage: 'Could not find member to sync from',
      electionTime: Timestamp({ t: 1646638482, i: 1 }),
      electionDate: ISODate("2022-03-07T07:34:42.000Z"),
      configVersion: 1,
      configTerm: 1,
      self: true,
      lastHeartbeatMessage: ''
    },
    {
      _id: 1,
      name: '192.168.100.99:27019',
      health: 1,
      state: 2,
      stateStr: 'SECONDARY',
      uptime: 42,
      optime: { ts: Timestamp({ t: 1646638512, i: 1 }), t: Long("1") },
      optimeDurable: { ts: Timestamp({ t: 1646638512, i: 1 }), t: Long("1") },
      optimeDate: ISODate("2022-03-07T07:35:12.000Z"),
      optimeDurableDate: ISODate("2022-03-07T07:35:12.000Z"),
      lastAppliedWallTime: ISODate("2022-03-07T07:35:12.676Z"),
      lastDurableWallTime: ISODate("2022-03-07T07:35:12.676Z"),
      lastHeartbeat: ISODate("2022-03-07T07:35:14.671Z"),
      lastHeartbeatRecv: ISODate("2022-03-07T07:35:14.172Z"),
      pingMs: Long("0"),
      lastHeartbeatMessage: '',
      syncSourceHost: '192.168.100.99:27018',
      syncSourceId: 0,
      infoMessage: '',
      configVersion: 1,
      configTerm: 1
    },
    {
      _id: 2,
      name: '192.168.100.99:27020',
      health: 1,
      state: 2,
      stateStr: 'SECONDARY',
      uptime: 42,
      optime: { ts: Timestamp({ t: 1646638512, i: 1 }), t: Long("1") },
      optimeDurable: { ts: Timestamp({ t: 1646638512, i: 1 }), t: Long("1") },
      optimeDate: ISODate("2022-03-07T07:35:12.000Z"),
      optimeDurableDate: ISODate("2022-03-07T07:35:12.000Z"),
      lastAppliedWallTime: ISODate("2022-03-07T07:35:12.676Z"),
      lastDurableWallTime: ISODate("2022-03-07T07:35:12.676Z"),
      lastHeartbeat: ISODate("2022-03-07T07:35:14.672Z"),
      lastHeartbeatRecv: ISODate("2022-03-07T07:35:14.193Z"),
      pingMs: Long("0"),
      lastHeartbeatMessage: '',
      syncSourceHost: '192.168.100.99:27018',
      syncSourceId: 0,
      infoMessage: '',
      configVersion: 1,
      configTerm: 1
    }
  ],
  ok: 1,
  '$clusterTime': {
    clusterTime: Timestamp({ t: 1646638512, i: 1 }),
    signature: {
      hash: Binary(Buffer.from("0000000000000000000000000000000000000000", "hex"), 0),
      keyId: Long("0")
    }
  },
  operationTime: Timestamp({ t: 1646638512, i: 1 })
}

可以看出mongo1爲PRIMARY

進入mongo1 插入數據

進入mongo2 查看數據

默認從節點不支持讀的操作

執行secondaryOk() 讓節點可以查詢