Mongod实例的角色由ISMaster命令返回的文档描述。要创建特定的用户凭据,已使用阵列SASL机制。当SaslSupportMech指定为可选字段时,它会返回。如果实例是副本集的成员,则ismaster命令返回副本集的子集。
ismaster命令发送到Mongod实例时返回关联信息,这不是副本集的成员。
语法:
db.runCommand( { isMaster: 1 } )
命令强制指定的副本设置为eAd sync的主成员,然后完成转换到主成员。
语法:
{ replSetAbortPrimaryCatchUp: 1 }
该命令返回指定副本集的当前配置的文档。要直接获取命令,无涯教程必须使用以下操作:
语法:
db.runCommand( { replSetGetConfig: 1 } );
例如 - 无涯教程有一个代表副本集配置的文档。它可能仅包括以下设置的子集:
{ _id: <string>, version: <int>, protocolVersion: <number>, writeConcernMajorityJournalDefault: <boolean>, configsvr: <boolean>, members: [ { _id: <int>, host: <string>, arbiterOnly: <boolean>, buildIndexes: <boolean>, hidden: <boolean>, priority: <number>, tags: <document>, slaveDelay: <int>, votes: <number> }, ... ], settings: { chainingAllowed : <boolean>, heartbeatIntervalMillis : <int>, heartbeatTimeoutSecs: <int>, electionTimeoutMillis : <int>, catchUpTimeoutMillis : <int>, getLastErrorModes : <document>, getLastErrorDefaults : <document>, replicaSetId: <ObjectId> } }
用于初始化新副本集的replSetInitiate命令。
链接:https://www.learnfk.comhttps://www.learnfk.com/mongodb/mongodb-replication-commands.html
来源:LearnFk无涯教程网
语法:
{ replSetInitiate : <config_document> }
示例将文档传递给rs.Initiate()
该命令将状态返回给副本集。它从服务器返回它,该服务器用于处理文档。此命令返回的数据从包含的其他成员发送到服务器中的信号中包含的数据。
语法:
db.adminCommand( { replSetGetStatus: 1 } )
示例:
db.adminCommand( { replSetGetStatus : 1 } ) { "set" : "replset", "date" : ISODate("2019-12-04T04:49:18.693Z"), "myState" : 1, "term" : NumberLong(3), "syncingTo" : "", "syncSourceHost" : "", "syncSourceId" : -1, "heartbeatIntervalMillis" : NumberLong(2000), "majorityVoteCount" : 2, "writeMajorityCount" : 2, "optimes" : { "lastCommittedOpTime" : { "ts" : Timestamp(1575434954, 1), "t" : NumberLong(3) }, "lastCommittedWallTime" : ISODate("2019-12-04T04:49:14.378Z"), "readConcernMajorityOpTime" : { "ts" : Timestamp(1575434954, 1), "t" : NumberLong(3) }, "readConcernMajorityWallTime" : ISODate("2019-12-04T04:49:14.378Z"), "appliedOpTime" : { "ts" : Timestamp(1575434954, 1), "t" : NumberLong(3) }, "durableOpTime" : { "ts" : Timestamp(1575434954, 1), "t" : NumberLong(3) }, "lastAppliedWallTime" : ISODate("2019-12-04T04:49:14.378Z"), "lastDurableWallTime" : ISODate("2019-12-04T04:49:14.378Z") }, "lastStableRecoveryTimestamp" : Timestamp(1575434935, 1), "lastStableCheckpointTimestamp" : Timestamp(1575434935, 1), "electionCandidateMetrics" : { "lastElectionReason" : "stepUpRequestSkipDryRun", "lastElectionDate" : ISODate("2019-12-04T04:49:04.085Z"), "electionTerm" : NumberLong(3), "lastCommittedOpTimeAtElection" : { "ts" : Timestamp(1575434935, 1), "t" : NumberLong(2) }, "lastSeenOpTimeAtElection" : { "ts" : Timestamp(1575434935, 1), "t" : NumberLong(2) }, "numVotesNeeded" : 2, "priorityAtElection" : 1, "electionTimeoutMillis" : NumberLong(10000), "priorPrimaryMemberId" : 1, "numCatchUpOps" : NumberLong(0), "newTermStartDate" : ISODate("2019-12-04T04:49:04.366Z"), "wMajorityWriteAvailabilityDate" : ISODate("2019-12-04T04:49:04.382Z") }, "electionParticipantMetrics" : { "votedForCandidate" : true, "electionTerm" : NumberLong(2), "lastVoteDate" : ISODate("2019-12-04T04:16:54.398Z"), "electionCandidateMemberId" : 1, "voteReason" : "", "lastAppliedOpTimeAtElection" : { "ts" : Timestamp(1575433013, 1), "t" : NumberLong(1) }, "maxAppliedOpTimeInSet" : { "ts" : Timestamp(1575433013, 1), "t" : NumberLong(1) }, "priorityAtElection" : 1 }, "members" : [ { "_id" : 0, "name" : "m1.example.net:27017", "ip" : "198.51.100.1", "health" : 1, "state" : 1, "stateStr" : "PRIMARY", "uptime" : 2019, "optime" : { "ts" : Timestamp(1575434954, 1), "t" : NumberLong(3) }, "optimeDate" : ISODate("2019-12-04T04:49:14Z"), "syncingTo" : "", "syncSourceHost" : "", "syncSourceId" : -1, "infoMessage" : "", "electionTime" : Timestamp(1575434944, 1), "electionDate" : ISODate("2019-12-04T04:49:04Z"), "configVersion" : 1, "self" : true, "lastHeartbeatMessage" : "" }, { "_id" : 1, "name" : "m2.example.net:27017", "ip" : "198.51.100.2", "health" : 1, "state" : 2, "stateStr" : "SECONDARY", "uptime" : 2016, "optime" : { "ts" : Timestamp(1575434954, 1), "t" : NumberLong(3) }, "optimeDurable" : { "ts" : Timestamp(1575434954, 1), "t" : NumberLong(3) }, "optimeDate" : ISODate("2019-12-04T04:49:14Z"), "optimeDurableDate" : ISODate("2019-12-04T04:49:14Z"), "lastHeartbeat" : ISODate("2019-12-04T04:49:18.138Z"), "lastHeartbeatRecv" : ISODate("2019-12-04T04:49:18.460Z"), "pingMs" : NumberLong(0), "lastHeartbeatMessage" : "", "syncingTo" : "m1.example.net:27017", "syncSourceHost" : "m1.example.net:27017", "syncSourceId" : 0, "infoMessage" : "", "configVersion" : 1 }, { "_id" : 2, "name" : "m3.example.net:27017", "ip" : "198.51.100.3", "health" : 1, "state" : 2, "stateStr" : "SECONDARY", "uptime" : 2016, "optime" : { "ts" : Timestamp(1575434954, 1), "t" : NumberLong(3) }, "optimeDurable" : { "ts" : Timestamp(1575434954, 1), "t" : NumberLong(3) }, "optimeDate" : ISODate("2019-12-04T04:49:14Z"), "optimeDurableDate" : ISODate("2019-12-04T04:49:14Z"), "lastHeartbeat" : ISODate("2019-12-04T04:49:18.138Z"), "lastHeartbeatRecv" : ISODate("2019-12-04T04:49:17.739Z"), "pingMs" : NumberLong(0), "lastHeartbeatMessage" : "", "syncingTo" : "m1.example.net:27017", "syncSourceHost" : "m1.example.net:27017", "syncSourceId" : 0, "infoMessage" : "", "configVersion" : 1 } ], "ok" : 1, "$clusterTime" : { "clusterTime" : Timestamp(1575434954, 1), "signature" : { "hash" : BinData(0,"Dz4WAzT3KpB5XHXwy3MgcjL3M8Q="), "keyId" : NumberLong("6766433010175705091") } }, "operationTime" : Timestamp(1575434954, 1) }
输出
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