视频版
https://www.bilibili.com/video/BV1Lv4y1Q7xe/
环境准备
按https://www.mongodb.com/docs/manual/administration/production-notes/#std-label-prod-notes-supported-platforms 所说6.0支持20.04和18.04
没说22.04支持，保险起见按文档准备系统版本
至少3个以上的奇数节点，5.0以上必须使用域名配置，节点间端口27017网络要求互通
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IP1 mongodb0.example.net IP2 mongodb1.example.net IP3 mongodb2.example.net IP1 test.w.mongo.db IP2 test.r.mongo.db IP3 test.r.mongo.db |
1.安装
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wget -qO - https://www.mongodb.org/static/pgp/server-6.0.asc | sudo apt-key add - sudo touch /etc/apt/sources.list.d/mongodb-org-6.0.list echo "deb [ arch=amd64,arm64 ] https://repo.mongodb.org/apt/ubuntu focal/mongodb-org/6.0 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-6.0.list sudo apt-get update sudo apt-get install -y mongodb-org |
常见目录
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数据 /var/lib/mongodb 日志 /var/log/mongodb 配置 /etc/mongod.conf |
常用命令
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sudo systemctl start mongod sudo systemctl stop mongod sudo systemctl restart mongod sudo systemctl status mongod mongosh |
2.集群配置
MongoDB 的复制集是由一组保持相同数据集的 mongod 进程组成的。复制集提供了冗余和 高可用的能力，同时它是所有生产环境部署的基础
在特定情况下可以提高读取性能，因为客户端可以把读取请求发送给不同的服务器。被复制多份数据可以用于灾备或审计
复制集包含几个 data bearing nodes和可选的一个arbiter node。在data bearing nodes上有且仅有一个成员是主节点，主节点 接收所有写请求操作，一个主节点会使用 { w: "majority" } 来标识
设置bindIp启用远程访问，生产环境注意提前设置密码和防火墙
https://www.mongodb.com/docs/manual/reference/configuration-options/#mongodb-setting-net.bindIp
配置集群名
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mongosh #初始化集群配置 rs.initiate( { _id : "rs0", members: [ { _id: 0, host: "mongodb0.example.net:27017" }, { _id: 1, host: "mongodb1.example.net:27017" }, { _id: 2, host: "mongodb2.example.net:27017" } ] }) test> rs.initiate( { ... _id : "rs0", ... members: [ ... { _id: 0, host: "test1.mongo.db:27017" }, ... { _id: 1, host: "test2.mongo.db:27017" }, ... { _id: 2, host: "test3.mongo.db:27017" } ... ] ... }) { ok: 1 } rs0 [direct: other] test> #查看集群配置 rs.conf() rs0 [direct: other] test> rs.conf() { _id: 'rs0', version: 1, term: 1, members: [ { _id: 0, host: 'test1.mongo.db:27017', arbiterOnly: false, buildIndexes: true, hidden: false, priority: 1, tags: {}, secondaryDelaySecs: Long("0"), votes: 1 }, { _id: 1, host: 'test2.mongo.db:27017', arbiterOnly: false, buildIndexes: true, hidden: false, priority: 1, tags: {}, secondaryDelaySecs: Long("0"), votes: 1 }, { _id: 2, host: 'test3.mongo.db:27017', arbiterOnly: false, buildIndexes: true, hidden: false, priority: 1, tags: {}, secondaryDelaySecs: Long("0"), votes: 1 } ], protocolVersion: Long("1"), writeConcernMajorityJournalDefault: true, settings: { chainingAllowed: true, heartbeatIntervalMillis: 2000, heartbeatTimeoutSecs: 10, electionTimeoutMillis: 10000, catchUpTimeoutMillis: -1, catchUpTakeoverDelayMillis: 30000, getLastErrorModes: {}, getLastErrorDefaults: { w: 1, wtimeout: 0 }, replicaSetId: ObjectId("639db0b39d9a0c1c17cfaf5a") } } rs0 [direct: primary] test> #查看主节点 rs.status() rs0 [direct: primary] test> rs.status() { set: 'rs0', date: ISODate("2022-12-17T12:06:57.005Z"), myState: 1, term: Long("1"), syncSourceHost: '', syncSourceId: -1, heartbeatIntervalMillis: Long("2000"), majorityVoteCount: 2, writeMajorityCount: 2, votingMembersCount: 3, writableVotingMembersCount: 3, optimes: { lastCommittedOpTime: { ts: Timestamp({ t: 1671278812, i: 1 }), t: Long("1") }, lastCommittedWallTime: ISODate("2022-12-17T12:06:52.885Z"), readConcernMajorityOpTime: { ts: Timestamp({ t: 1671278812, i: 1 }), t: Long("1") }, appliedOpTime: { ts: Timestamp({ t: 1671278812, i: 1 }), t: Long("1") }, durableOpTime: { ts: Timestamp({ t: 1671278812, i: 1 }), t: Long("1") }, lastAppliedWallTime: ISODate("2022-12-17T12:06:52.885Z"), lastDurableWallTime: ISODate("2022-12-17T12:06:52.885Z") }, lastStableRecoveryTimestamp: Timestamp({ t: 1671278771, i: 1 }), electionCandidateMetrics: { lastElectionReason: 'electionTimeout', lastElectionDate: ISODate("2022-12-17T12:06:22.806Z"), electionTerm: Long("1"), lastCommittedOpTimeAtElection: { ts: Timestamp({ t: 1671278771, i: 1 }), t: Long("-1") }, lastSeenOpTimeAtElection: { ts: Timestamp({ t: 1671278771, i: 1 }), t: Long("-1") }, numVotesNeeded: 2, priorityAtElection: 1, electionTimeoutMillis: Long("10000"), numCatchUpOps: Long("0"), newTermStartDate: ISODate("2022-12-17T12:06:22.864Z"), wMajorityWriteAvailabilityDate: ISODate("2022-12-17T12:06:23.645Z") }, members: [ { _id: 0, name: 'test1.mongo.db:27017', health: 1, state: 1, stateStr: 'PRIMARY', uptime: 142, optime: { ts: Timestamp({ t: 1671278812, i: 1 }), t: Long("1") }, optimeDate: ISODate("2022-12-17T12:06:52.000Z"), lastAppliedWallTime: ISODate("2022-12-17T12:06:52.885Z"), lastDurableWallTime: ISODate("2022-12-17T12:06:52.885Z"), syncSourceHost: '', syncSourceId: -1, infoMessage: '', electionTime: Timestamp({ t: 1671278782, i: 1 }), electionDate: ISODate("2022-12-17T12:06:22.000Z"), configVersion: 1, configTerm: 1, self: true, lastHeartbeatMessage: '' }, { _id: 1, name: 'test2.mongo.db:27017', health: 1, state: 2, stateStr: 'SECONDARY', uptime: 45, optime: { ts: Timestamp({ t: 1671278812, i: 1 }), t: Long("1") }, optimeDurable: { ts: Timestamp({ t: 1671278812, i: 1 }), t: Long("1") }, optimeDate: ISODate("2022-12-17T12:06:52.000Z"), optimeDurableDate: ISODate("2022-12-17T12:06:52.000Z"), lastAppliedWallTime: ISODate("2022-12-17T12:06:52.885Z"), lastDurableWallTime: ISODate("2022-12-17T12:06:52.885Z"), lastHeartbeat: ISODate("2022-12-17T12:06:56.857Z"), lastHeartbeatRecv: ISODate("2022-12-17T12:06:55.864Z"), pingMs: Long("0"), lastHeartbeatMessage: '', syncSourceHost: 'test1.mongo.db:27017', syncSourceId: 0, infoMessage: '', configVersion: 1, configTerm: 1 }, { _id: 2, name: 'test3.mongo.db:27017', health: 1, state: 2, stateStr: 'SECONDARY', uptime: 45, optime: { ts: Timestamp({ t: 1671278812, i: 1 }), t: Long("1") }, optimeDurable: { ts: Timestamp({ t: 1671278812, i: 1 }), t: Long("1") }, optimeDate: ISODate("2022-12-17T12:06:52.000Z"), optimeDurableDate: ISODate("2022-12-17T12:06:52.000Z"), lastAppliedWallTime: ISODate("2022-12-17T12:06:52.885Z"), lastDurableWallTime: ISODate("2022-12-17T12:06:52.885Z"), lastHeartbeat: ISODate("2022-12-17T12:06:56.857Z"), lastHeartbeatRecv: ISODate("2022-12-17T12:06:55.860Z"), pingMs: Long("0"), lastHeartbeatMessage: '', syncSourceHost: 'test1.mongo.db:27017', syncSourceId: 0, infoMessage: '', configVersion: 1, configTerm: 1 } ], ok: 1, '$clusterTime': { clusterTime: Timestamp({ t: 1671278812, i: 1 }), signature: { hash: Binary(Buffer.from("0000000000000000000000000000000000000000", "hex"), 0), keyId: Long("0") } }, operationTime: Timestamp({ t: 1671278812, i: 1 }) } |
3.灾备测试
挂掉1之后到2 上查看集群状态如下，可以发现2自动变成了主
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rs0 [direct: primary] test> rs.status() { set: 'rs0', date: ISODate("2022-12-17T12:18:35.005Z"), myState: 1, term: Long("2"), syncSourceHost: '', syncSourceId: -1, heartbeatIntervalMillis: Long("2000"), majorityVoteCount: 2, writeMajorityCount: 2, votingMembersCount: 3, writableVotingMembersCount: 3, optimes: { lastCommittedOpTime: { ts: Timestamp({ t: 1671279508, i: 1 }), t: Long("2") }, lastCommittedWallTime: ISODate("2022-12-17T12:18:28.862Z"), readConcernMajorityOpTime: { ts: Timestamp({ t: 1671279508, i: 1 }), t: Long("2") }, appliedOpTime: { ts: Timestamp({ t: 1671279508, i: 1 }), t: Long("2") }, durableOpTime: { ts: Timestamp({ t: 1671279508, i: 1 }), t: Long("2") }, lastAppliedWallTime: ISODate("2022-12-17T12:18:28.862Z"), lastDurableWallTime: ISODate("2022-12-17T12:18:28.862Z") }, lastStableRecoveryTimestamp: Timestamp({ t: 1671279498, i: 1 }), electionCandidateMetrics: { lastElectionReason: 'stepUpRequestSkipDryRun', lastElectionDate: ISODate("2022-12-17T12:17:28.838Z"), electionTerm: Long("2"), lastCommittedOpTimeAtElection: { ts: Timestamp({ t: 1671279442, i: 1 }), t: Long("1") }, lastSeenOpTimeAtElection: { ts: Timestamp({ t: 1671279442, i: 1 }), t: Long("1") }, numVotesNeeded: 2, priorityAtElection: 1, electionTimeoutMillis: Long("10000"), priorPrimaryMemberId: 0, numCatchUpOps: Long("0"), newTermStartDate: ISODate("2022-12-17T12:17:28.858Z"), wMajorityWriteAvailabilityDate: ISODate("2022-12-17T12:17:29.859Z") }, electionParticipantMetrics: { votedForCandidate: true, electionTerm: Long("1"), lastVoteDate: ISODate("2022-12-17T12:06:22.621Z"), electionCandidateMemberId: 0, voteReason: '', lastAppliedOpTimeAtElection: { ts: Timestamp({ t: 1671278771, i: 1 }), t: Long("-1") }, maxAppliedOpTimeInSet: { ts: Timestamp({ t: 1671278771, i: 1 }), t: Long("-1") }, priorityAtElection: 1 }, members: [ { _id: 0, name: 'test1.mongo.db:27017', health: 0, state: 8, stateStr: '(not reachable/healthy)', uptime: 0, optime: { ts: Timestamp({ t: 0, i: 0 }), t: Long("-1") }, optimeDurable: { ts: Timestamp({ t: 0, i: 0 }), t: Long("-1") }, optimeDate: ISODate("1970-01-01T00:00:00.000Z"), optimeDurableDate: ISODate("1970-01-01T00:00:00.000Z"), lastAppliedWallTime: ISODate("2022-12-17T12:17:38.860Z"), lastDurableWallTime: ISODate("2022-12-17T12:17:38.860Z"), lastHeartbeat: ISODate("2022-12-17T12:18:33.050Z"), lastHeartbeatRecv: ISODate("2022-12-17T12:17:41.884Z"), pingMs: Long("0"), lastHeartbeatMessage: 'Error connecting to test1.mongo.db:27017 (192.168.2.224:27017) :: caused by :: Connection refused', syncSourceHost: '', syncSourceId: -1, infoMessage: '', configVersion: 1, configTerm: 2 }, { _id: 1, name: 'test2.mongo.db:27017', health: 1, state: 1, stateStr: 'PRIMARY', uptime: 839, optime: { ts: Timestamp({ t: 1671279508, i: 1 }), t: Long("2") }, optimeDate: ISODate("2022-12-17T12:18:28.000Z"), lastAppliedWallTime: ISODate("2022-12-17T12:18:28.862Z"), lastDurableWallTime: ISODate("2022-12-17T12:18:28.862Z"), syncSourceHost: '', syncSourceId: -1, infoMessage: '', electionTime: Timestamp({ t: 1671279448, i: 1 }), electionDate: ISODate("2022-12-17T12:17:28.000Z"), configVersion: 1, configTerm: 2, self: true, lastHeartbeatMessage: '' }, { _id: 2, name: 'test3.mongo.db:27017', health: 1, state: 2, stateStr: 'SECONDARY', uptime: 742, optime: { ts: Timestamp({ t: 1671279508, i: 1 }), t: Long("2") }, optimeDurable: { ts: Timestamp({ t: 1671279508, i: 1 }), t: Long("2") }, optimeDate: ISODate("2022-12-17T12:18:28.000Z"), optimeDurableDate: ISODate("2022-12-17T12:18:28.000Z"), lastAppliedWallTime: ISODate("2022-12-17T12:18:28.862Z"), lastDurableWallTime: ISODate("2022-12-17T12:18:28.862Z"), lastHeartbeat: ISODate("2022-12-17T12:18:34.909Z"), lastHeartbeatRecv: ISODate("2022-12-17T12:18:33.989Z"), pingMs: Long("0"), lastHeartbeatMessage: '', syncSourceHost: 'test2.mongo.db:27017', syncSourceId: 1, infoMessage: '', configVersion: 1, configTerm: 2 } ], ok: 1, '$clusterTime': { clusterTime: Timestamp({ t: 1671279508, i: 1 }), signature: { hash: Binary(Buffer.from("0000000000000000000000000000000000000000", "hex"), 0), keyId: Long("0") } }, operationTime: Timestamp({ t: 1671279508, i: 1 }) } |
重启1之后，再次查看，可以发现1重新加入了集群，但身份是从节点
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rs0 [direct: primary] test> rs.status() { set: 'rs0', date: ISODate("2022-12-17T12:19:42.878Z"), myState: 1, term: Long("2"), syncSourceHost: '', syncSourceId: -1, heartbeatIntervalMillis: Long("2000"), majorityVoteCount: 2, writeMajorityCount: 2, votingMembersCount: 3, writableVotingMembersCount: 3, optimes: { lastCommittedOpTime: { ts: Timestamp({ t: 1671279579, i: 1 }), t: Long("2") }, lastCommittedWallTime: ISODate("2022-12-17T12:19:39.170Z"), readConcernMajorityOpTime: { ts: Timestamp({ t: 1671279579, i: 1 }), t: Long("2") }, appliedOpTime: { ts: Timestamp({ t: 1671279579, i: 1 }), t: Long("2") }, durableOpTime: { ts: Timestamp({ t: 1671279579, i: 1 }), t: Long("2") }, lastAppliedWallTime: ISODate("2022-12-17T12:19:39.170Z"), lastDurableWallTime: ISODate("2022-12-17T12:19:39.170Z") }, lastStableRecoveryTimestamp: Timestamp({ t: 1671279558, i: 1 }), electionCandidateMetrics: { lastElectionReason: 'stepUpRequestSkipDryRun', lastElectionDate: ISODate("2022-12-17T12:17:28.838Z"), electionTerm: Long("2"), lastCommittedOpTimeAtElection: { ts: Timestamp({ t: 1671279442, i: 1 }), t: Long("1") }, lastSeenOpTimeAtElection: { ts: Timestamp({ t: 1671279442, i: 1 }), t: Long("1") }, numVotesNeeded: 2, priorityAtElection: 1, electionTimeoutMillis: Long("10000"), priorPrimaryMemberId: 0, numCatchUpOps: Long("0"), newTermStartDate: ISODate("2022-12-17T12:17:28.858Z"), wMajorityWriteAvailabilityDate: ISODate("2022-12-17T12:17:29.859Z") }, electionParticipantMetrics: { votedForCandidate: true, electionTerm: Long("1"), lastVoteDate: ISODate("2022-12-17T12:06:22.621Z"), electionCandidateMemberId: 0, voteReason: '', lastAppliedOpTimeAtElection: { ts: Timestamp({ t: 1671278771, i: 1 }), t: Long("-1") }, maxAppliedOpTimeInSet: { ts: Timestamp({ t: 1671278771, i: 1 }), t: Long("-1") }, priorityAtElection: 1 }, members: [ { _id: 0, name: 'test1.mongo.db:27017', health: 1, state: 2, stateStr: 'SECONDARY', uptime: 5, optime: { ts: Timestamp({ t: 1671279579, i: 1 }), t: Long("2") }, optimeDurable: { ts: Timestamp({ t: 1671279579, i: 1 }), t: Long("2") }, optimeDate: ISODate("2022-12-17T12:19:39.000Z"), optimeDurableDate: ISODate("2022-12-17T12:19:39.000Z"), lastAppliedWallTime: ISODate("2022-12-17T12:19:39.170Z"), lastDurableWallTime: ISODate("2022-12-17T12:19:39.170Z"), lastHeartbeat: ISODate("2022-12-17T12:19:41.318Z"), lastHeartbeatRecv: ISODate("2022-12-17T12:19:41.768Z"), pingMs: Long("0"), lastHeartbeatMessage: '', syncSourceHost: 'test3.mongo.db:27017', syncSourceId: 2, infoMessage: '', configVersion: 1, configTerm: 2 }, { _id: 1, name: 'test2.mongo.db:27017', health: 1, state: 1, stateStr: 'PRIMARY', uptime: 907, optime: { ts: Timestamp({ t: 1671279579, i: 1 }), t: Long("2") }, optimeDate: ISODate("2022-12-17T12:19:39.000Z"), lastAppliedWallTime: ISODate("2022-12-17T12:19:39.170Z"), lastDurableWallTime: ISODate("2022-12-17T12:19:39.170Z"), syncSourceHost: '', syncSourceId: -1, infoMessage: '', electionTime: Timestamp({ t: 1671279448, i: 1 }), electionDate: ISODate("2022-12-17T12:17:28.000Z"), configVersion: 1, configTerm: 2, self: true, lastHeartbeatMessage: '' }, { _id: 2, name: 'test3.mongo.db:27017', health: 1, state: 2, stateStr: 'SECONDARY', uptime: 810, optime: { ts: Timestamp({ t: 1671279579, i: 1 }), t: Long("2") }, optimeDurable: { ts: Timestamp({ t: 1671279579, i: 1 }), t: Long("2") }, optimeDate: ISODate("2022-12-17T12:19:39.000Z"), optimeDurableDate: ISODate("2022-12-17T12:19:39.000Z"), lastAppliedWallTime: ISODate("2022-12-17T12:19:39.170Z"), lastDurableWallTime: ISODate("2022-12-17T12:19:39.170Z"), lastHeartbeat: ISODate("2022-12-17T12:19:40.962Z"), lastHeartbeatRecv: ISODate("2022-12-17T12:19:42.044Z"), pingMs: Long("0"), lastHeartbeatMessage: '', syncSourceHost: 'test2.mongo.db:27017', syncSourceId: 1, infoMessage: '', configVersion: 1, configTerm: 2 } ], ok: 1, '$clusterTime': { clusterTime: Timestamp({ t: 1671279579, i: 1 }), signature: { hash: Binary(Buffer.from("0000000000000000000000000000000000000000", "hex"), 0), keyId: Long("0") } }, operationTime: Timestamp({ t: 1671279579, i: 1 }) } |
从2写入点新数据，到1查询测试，可以发现是正常的
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rs0 [direct: secondary] test> use sample_mflix switched to db sample_mflix rs0 [direct: secondary] sample_mflix> db.getMongo().setReadPref('secondary') rs0 [direct: secondary] sample_mflix> db.movies.find( { title: "The Favourite1" } ) [ { _id: ObjectId("639db429d29c478bd6ec0507"), title: 'The Favourite1', genres: [ 'Drama', 'History' ], runtime: 121, rated: 'R', year: 2018, directors: [ 'Yorgos Lanthimos' ], cast: [ 'Olivia Colman', 'Emma Stone', 'Rachel Weisz' ], type: 'movie' } ] rs0 [direct: secondary] sample_mflix> |
挂掉现在的从节点3，写入新数据后再重启3
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rs0 [direct: primary] sample_mflix> rs.status() { set: 'rs0', date: ISODate("2022-12-17T12:22:41.079Z"), myState: 1, term: Long("2"), syncSourceHost: '', syncSourceId: -1, heartbeatIntervalMillis: Long("2000"), majorityVoteCount: 2, writeMajorityCount: 2, votingMembersCount: 3, writableVotingMembersCount: 3, optimes: { lastCommittedOpTime: { ts: Timestamp({ t: 1671279758, i: 1 }), t: Long("2") }, lastCommittedWallTime: ISODate("2022-12-17T12:22:38.878Z"), readConcernMajorityOpTime: { ts: Timestamp({ t: 1671279758, i: 1 }), t: Long("2") }, appliedOpTime: { ts: Timestamp({ t: 1671279758, i: 1 }), t: Long("2") }, durableOpTime: { ts: Timestamp({ t: 1671279758, i: 1 }), t: Long("2") }, lastAppliedWallTime: ISODate("2022-12-17T12:22:38.878Z"), lastDurableWallTime: ISODate("2022-12-17T12:22:38.878Z") }, lastStableRecoveryTimestamp: Timestamp({ t: 1671279738, i: 1 }), electionCandidateMetrics: { lastElectionReason: 'stepUpRequestSkipDryRun', lastElectionDate: ISODate("2022-12-17T12:17:28.838Z"), electionTerm: Long("2"), lastCommittedOpTimeAtElection: { ts: Timestamp({ t: 1671279442, i: 1 }), t: Long("1") }, lastSeenOpTimeAtElection: { ts: Timestamp({ t: 1671279442, i: 1 }), t: Long("1") }, numVotesNeeded: 2, priorityAtElection: 1, electionTimeoutMillis: Long("10000"), priorPrimaryMemberId: 0, numCatchUpOps: Long("0"), newTermStartDate: ISODate("2022-12-17T12:17:28.858Z"), wMajorityWriteAvailabilityDate: ISODate("2022-12-17T12:17:29.859Z") }, electionParticipantMetrics: { votedForCandidate: true, electionTerm: Long("1"), lastVoteDate: ISODate("2022-12-17T12:06:22.621Z"), electionCandidateMemberId: 0, voteReason: '', lastAppliedOpTimeAtElection: { ts: Timestamp({ t: 1671278771, i: 1 }), t: Long("-1") }, maxAppliedOpTimeInSet: { ts: Timestamp({ t: 1671278771, i: 1 }), t: Long("-1") }, priorityAtElection: 1 }, members: [ { _id: 0, name: 'test1.mongo.db:27017', health: 1, state: 2, stateStr: 'SECONDARY', uptime: 183, optime: { ts: Timestamp({ t: 1671279748, i: 1 }), t: Long("2") }, optimeDurable: { ts: Timestamp({ t: 1671279748, i: 1 }), t: Long("2") }, optimeDate: ISODate("2022-12-17T12:22:28.000Z"), optimeDurableDate: ISODate("2022-12-17T12:22:28.000Z"), lastAppliedWallTime: ISODate("2022-12-17T12:22:38.878Z"), lastDurableWallTime: ISODate("2022-12-17T12:22:38.878Z"), lastHeartbeat: ISODate("2022-12-17T12:22:39.460Z"), lastHeartbeatRecv: ISODate("2022-12-17T12:22:39.967Z"), pingMs: Long("0"), lastHeartbeatMessage: '', syncSourceHost: '', syncSourceId: -1, infoMessage: '', configVersion: 1, configTerm: 2 }, { _id: 1, name: 'test2.mongo.db:27017', health: 1, state: 1, stateStr: 'PRIMARY', uptime: 1086, optime: { ts: Timestamp({ t: 1671279758, i: 1 }), t: Long("2") }, optimeDate: ISODate("2022-12-17T12:22:38.000Z"), lastAppliedWallTime: ISODate("2022-12-17T12:22:38.878Z"), lastDurableWallTime: ISODate("2022-12-17T12:22:38.878Z"), syncSourceHost: '', syncSourceId: -1, infoMessage: '', electionTime: Timestamp({ t: 1671279448, i: 1 }), electionDate: ISODate("2022-12-17T12:17:28.000Z"), configVersion: 1, configTerm: 2, self: true, lastHeartbeatMessage: '' }, { _id: 2, name: 'test3.mongo.db:27017', health: 0, state: 8, stateStr: '(not reachable/healthy)', uptime: 0, optime: { ts: Timestamp({ t: 0, i: 0 }), t: Long("-1") }, optimeDurable: { ts: Timestamp({ t: 0, i: 0 }), t: Long("-1") }, optimeDate: ISODate("1970-01-01T00:00:00.000Z"), optimeDurableDate: ISODate("1970-01-01T00:00:00.000Z"), lastAppliedWallTime: ISODate("2022-12-17T12:22:28.878Z"), lastDurableWallTime: ISODate("2022-12-17T12:22:28.878Z"), lastHeartbeat: ISODate("2022-12-17T12:22:39.106Z"), lastHeartbeatRecv: ISODate("2022-12-17T12:22:34.175Z"), pingMs: Long("0"), lastHeartbeatMessage: 'Error connecting to test3.mongo.db:27017 (192.168.2.178:27017) :: caused by :: Connection refused', syncSourceHost: '', syncSourceId: -1, infoMessage: '', configVersion: 1, configTerm: 2 } ], ok: 1, '$clusterTime': { clusterTime: Timestamp({ t: 1671279758, i: 1 }), signature: { hash: Binary(Buffer.from("0000000000000000000000000000000000000000", "hex"), 0), keyId: Long("0") } }, operationTime: Timestamp({ t: 1671279758, i: 1 }) } |
可以发现新写入的数据依然可以正常查询
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rs0 [direct: secondary] sample_mflix> db.getMongo().setReadPref('secondary') rs0 [direct: secondary] sample_mflix> db.movies.find( { title: "The Favourite2" } ) [ { _id: ObjectId("639db4b7d29c478bd6ec0508"), title: 'The Favourite2', genres: [ 'Drama', 'History' ], runtime: 121, rated: 'R', year: 2018, directors: [ 'Yorgos Lanthimos' ], cast: [ 'Olivia Colman', 'Emma Stone', 'Rachel Weisz' ], type: 'movie' } ] |
附录
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mongo https://mirrors.tuna.tsinghua.edu.cn #分配DNS 192.168.2.224 test1.mongo.db 192.168.2.147 test2.mongo.db 192.168.2.178 test3.mongo.db #远程ssh+免密+禁用密码登录 ssh mongo1@test1.mongo.db ssh mongo2@test2.mongo.db ssh mongo3@test3.mongo.db #安装mongo wget -qO - https://www.mongodb.org/static/pgp/server-6.0.asc | sudo apt-key add - sudo touch /etc/apt/sources.list.d/mongodb-org-6.0.list echo "deb [ arch=amd64,arm64 ] https://repo.mongodb.org/apt/ubuntu focal/mongodb-org/6.0 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-6.0.list sudo apt-get update sudo apt-get install -y mongodb-org #单机测试 mongosh 端口 27017 db use test #集群配置 修改每个机器的bindIp sudo vim /etc/mongod.conf sudo service mongod restart #尝试远程连接 mongosh test1.mongo.db mongosh test2.mongo.db mongosh test3.mongo.db #配置集群名 replSetName: "rs0" sudo vim /etc/mongod.conf sudo service mongod restart #初始化集群 rs.initiate( { _id : "rs0", members: [ { _id: 0, host: "test1.mongo.db:27017" }, { _id: 1, host: "test2.mongo.db:27017" }, { _id: 2, host: "test3.mongo.db:27017" } ] }) rs.conf() rs.status() #集群测试 use sample_mflix db.movies.insertOne( { title: "The Favourite", genres: [ "Drama", "History" ], runtime: 121, rated: "R", year: 2018, directors: [ "Yorgos Lanthimos" ], cast: [ "Olivia Colman", "Emma Stone", "Rachel Weisz" ], type: "movie" } ) db.getMongo().setReadPref('secondary') db.movies.find( { title: "The Favourite" } ) |
参考
https://www.mongodb.com/docs/manual/
https://www.mongodb.com/docs/manual/replication/
https://www.mongodb.com/docs/manual/tutorial/deploy-replica-set/
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