mongodb的副本集方法

方法名	描述
rs.initiate()
rs.addArb()
rs.help()
rs.printReplicationInfo()	查看到副本集操作日志
rs.remove()	减少副本集节点
rs.freeze()	“冻结”mongodb实例
rs.status()	查看副本集状态
db.printSlaveReplicationInfo	查看复制集的同步状态
rs.add()	增加副本集节点
rs.stepDown()	将当前主库“降级”
rs.slaveOk()
rs.conf()
rs.syncFrom()
rs.reconfig()

glc-test:PRIMARY> rs.help()
        rs.status()                                { replSetGetStatus : 1 } checks repl set status
        rs.initiate()                              { replSetInitiate : null } initiates set with default settings
        rs.initiate(cfg)                           { replSetInitiate : cfg } initiates set with configuration cfg
        rs.conf()                                  get the current configuration object from local.system.replset
        rs.reconfig(cfg)                           updates the configuration of a running replica set with cfg (disconnects)
        rs.add(hostportstr)                        add a new member to the set with default attributes (disconnects)
        rs.add(membercfgobj)                       add a new member to the set with extra attributes (disconnects)
        rs.addArb(hostportstr)                     add a new member which is arbiterOnly:true (disconnects)
        rs.stepDown([stepdownSecs, catchUpSecs])   step down as primary (disconnects)
        rs.syncFrom(hostportstr)                   make a secondary sync from the given member
        rs.freeze(secs)                            make a node ineligible to become primary for the time specified
        rs.remove(hostportstr)                     remove a host from the replica set (disconnects)
        rs.slaveOk()                               allow queries on secondary nodes

        rs.printReplicationInfo()                  check oplog size and time range
        rs.printSlaveReplicationInfo()             check replica set members and replication lag
        db.isMaster()                              check who is primary

        reconfiguration helpers disconnect from the database so the shell will display
        an error, even if the command succeeds.
glc-test:PRIMARY> 
glc-test:PRIMARY> 
glc-test:PRIMARY>  rs.slaveOk()
glc-test:PRIMARY> 
glc-test:PRIMARY> 
glc-test:PRIMARY> db.isMaster()
{
        "hosts" : [
                "c3-dba-glc-db03.bj:28042",
                "c4-mc-buffer-db41.bj:28042",
                "c4-using-glc-db05.bj:28042"
        ],
        "setName" : "glc-test",
        "setVersion" : 3,
        "ismaster" : true,
        "secondary" : false,
        "primary" : "c4-mc-buffer-db41.bj:28042",
        "me" : "c4-mc-buffer-db41.bj:28042",
        "electionId" : ObjectId("7fffffff0000000000000071"),
        "lastWrite" : {
                "opTime" : {
                        "ts" : Timestamp(1604998554, 1),
                        "t" : NumberLong(113)
                },
                "lastWriteDate" : ISODate("2020-11-10T08:55:54Z"),
                "majorityOpTime" : {
                        "ts" : Timestamp(1604998554, 1),
                        "t" : NumberLong(113)
                },
                "majorityWriteDate" : ISODate("2020-11-10T08:55:54Z")
        },
        "maxBsonObjectSize" : 16777216,
        "maxMessageSizeBytes" : 48000000,
        "maxWriteBatchSize" : 100000,
        "localTime" : ISODate("2020-11-10T08:55:57.034Z"),
        "logicalSessionTimeoutMinutes" : 30,
        "minWireVersion" : 0,
        "maxWireVersion" : 7,
        "readOnly" : false,
        "ok" : 1,
        "operationTime" : Timestamp(1604998554, 1),
        "$clusterTime" : {
                "clusterTime" : Timestamp(1604998554, 1),
                "signature" : {
                        "hash" : BinData(0,"ClLo/8FOOXSQJ0zson/tzskvsOI="),
                        "keyId" : NumberLong("6856584343653974019")
                }
        }
}
glc-test:PRIMARY> rs.printReplicationInfo()  
configured oplog size:   16384MB
log length start to end: 350295secs (97.3hrs)
oplog first event time:  Fri Nov 06 2020 15:37:49 GMT+0800 (CST)
oplog last event time:   Tue Nov 10 2020 16:56:04 GMT+0800 (CST)
now:                     Tue Nov 10 2020 16:56:07 GMT+0800 (CST)
glc-test:PRIMARY> rs.printSlaveReplicationInfo()
source: c3-dba-glc-db03.bj:28042
        syncedTo: Tue Nov 10 2020 16:56:04 GMT+0800 (CST)
        0 secs (0 hrs) behind the primary 
source: c4-using-glc-db05.bj:28042
        syncedTo: Tue Nov 10 2020 16:56:04 GMT+0800 (CST)
        0 secs (0 hrs) behind the primary 
glc-test:PRIMARY>  rs.conf()  
{
        "_id" : "glc-test",
        "version" : 3,
        "protocolVersion" : NumberLong(1),
        "writeConcernMajorityJournalDefault" : true,
        "members" : [
                {
                        "_id" : 0,
                        "host" : "c3-dba-glc-db03.bj:28042",
                        "arbiterOnly" : false,
                        "buildIndexes" : true,
                        "hidden" : false,
                        "priority" : 1,
                        "tags" : {

                        },
                        "slaveDelay" : NumberLong(0),
                        "votes" : 1
                },
                {
                        "_id" : 1,
                        "host" : "c4-mc-buffer-db41.bj:28042",
                        "arbiterOnly" : false,
                        "buildIndexes" : true,
                        "hidden" : false,
                        "priority" : 1,
                        "tags" : {

                        },
                        "slaveDelay" : NumberLong(0),
                        "votes" : 1
                },
                {
                        "_id" : 2,
                        "host" : "c4-using-glc-db05.bj:28042",
                        "arbiterOnly" : false,
                        "buildIndexes" : true,
                        "hidden" : false,
                        "priority" : 1,
                        "tags" : {

                        },
                        "slaveDelay" : NumberLong(0),
                        "votes" : 1
                }
        ],
        "settings" : {
                "chainingAllowed" : true,
                "heartbeatIntervalMillis" : 2000,
                "heartbeatTimeoutSecs" : 10,
                "electionTimeoutMillis" : 10000,
                "catchUpTimeoutMillis" : -1,
                "catchUpTakeoverDelayMillis" : 30000,
                "getLastErrorModes" : {

                },
                "getLastErrorDefaults" : {
                        "w" : 1,
                        "wtimeout" : 0
                },
                "replicaSetId" : ObjectId("5f277b18c13c2cbe19624b2d")
        }
}
glc-test:PRIMARY>  rs.status()
{
        "set" : "glc-test",
        "date" : ISODate("2020-11-10T08:56:26.438Z"),
        "myState" : 1,
        "term" : NumberLong(113),
        "syncingTo" : "",
        "syncSourceHost" : "",
        "syncSourceId" : -1,
        "heartbeatIntervalMillis" : NumberLong(2000),
        "optimes" : {
                "lastCommittedOpTime" : {
                        "ts" : Timestamp(1604998584, 1),
                        "t" : NumberLong(113)
                },
                "readConcernMajorityOpTime" : {
                        "ts" : Timestamp(1604998584, 1),
                        "t" : NumberLong(113)
                },
                "appliedOpTime" : {
                        "ts" : Timestamp(1604998584, 1),
                        "t" : NumberLong(113)
                },
                "durableOpTime" : {
                        "ts" : Timestamp(1604998584, 1),
                        "t" : NumberLong(113)
                }
        },
        "lastStableCheckpointTimestamp" : Timestamp(1604998534, 1),
        "electionCandidateMetrics" : {
                "lastElectionReason" : "stepUpRequestSkipDryRun",
                "lastElectionDate" : ISODate("2020-10-20T08:13:43.452Z"),
                "electionTerm" : NumberLong(113),
                "lastCommittedOpTimeAtElection" : {
                        "ts" : Timestamp(1603181617, 1),
                        "t" : NumberLong(112)
                },
                "lastSeenOpTimeAtElection" : {
                        "ts" : Timestamp(1603181617, 1),
                        "t" : NumberLong(112)
                },
                "numVotesNeeded" : 2,
                "priorityAtElection" : 1,
                "electionTimeoutMillis" : NumberLong(10000),
                "priorPrimaryMemberId" : 0,
                "numCatchUpOps" : NumberLong(0),
                "newTermStartDate" : ISODate("2020-10-20T08:13:43.456Z"),
                "wMajorityWriteAvailabilityDate" : ISODate("2020-10-20T08:13:43.458Z")
        },
        "electionParticipantMetrics" : {
                "votedForCandidate" : true,
                "electionTerm" : NumberLong(112),
                "lastVoteDate" : ISODate("2020-09-22T06:24:36.196Z"),
                "electionCandidateMemberId" : 0,
                "voteReason" : "",
                "lastAppliedOpTimeAtElection" : {
                        "ts" : Timestamp(1600755874, 1),
                        "t" : NumberLong(111)
                },
                "maxAppliedOpTimeInSet" : {
                        "ts" : Timestamp(1600755874, 1),
                        "t" : NumberLong(111)
                },
                "priorityAtElection" : 1
        },
        "members" : [
                {
                        "_id" : 0,
                        "name" : "c3-dba-glc-db03.bj:28042",
                        "health" : 1,
                        "state" : 2,
                        "stateStr" : "SECONDARY",
                        "uptime" : 4243441,
                        "optime" : {
                                "ts" : Timestamp(1604998584, 1),
                                "t" : NumberLong(113)
                        },
                        "optimeDurable" : {
                                "ts" : Timestamp(1604998584, 1),
                                "t" : NumberLong(113)
                        },
                        "optimeDate" : ISODate("2020-11-10T08:56:24Z"),
                        "optimeDurableDate" : ISODate("2020-11-10T08:56:24Z"),
                        "lastHeartbeat" : ISODate("2020-11-10T08:56:24.572Z"),
                        "lastHeartbeatRecv" : ISODate("2020-11-10T08:56:24.820Z"),
                        "pingMs" : NumberLong(1),
                        "lastHeartbeatMessage" : "",
                        "syncingTo" : "c4-mc-buffer-db41.bj:28042",
                        "syncSourceHost" : "c4-mc-buffer-db41.bj:28042",
                        "syncSourceId" : 1,
                        "infoMessage" : "",
                        "configVersion" : 3
                },
                {
                        "_id" : 1,
                        "name" : "c4-mc-buffer-db41.bj:28042",
                        "health" : 1,
                        "state" : 1,
                        "stateStr" : "PRIMARY",
                        "uptime" : 6401661,
                        "optime" : {
                                "ts" : Timestamp(1604998584, 1),
                                "t" : NumberLong(113)
                        },
                        "optimeDate" : ISODate("2020-11-10T08:56:24Z"),
                        "syncingTo" : "",
                        "syncSourceHost" : "",
                        "syncSourceId" : -1,
                        "infoMessage" : "",
                        "electionTime" : Timestamp(1603181623, 1),
                        "electionDate" : ISODate("2020-10-20T08:13:43Z"),
                        "configVersion" : 3,
                        "self" : true,
                        "lastHeartbeatMessage" : ""
                },
                {
                        "_id" : 2,
                        "name" : "c4-using-glc-db05.bj:28042",
                        "health" : 1,
                        "state" : 2,
                        "stateStr" : "SECONDARY",
                        "uptime" : 4227596,
                        "optime" : {
                                "ts" : Timestamp(1604998584, 1),
                                "t" : NumberLong(113)
                        },
                        "optimeDurable" : {
                                "ts" : Timestamp(1604998584, 1),
                                "t" : NumberLong(113)
                        },
                        "optimeDate" : ISODate("2020-11-10T08:56:24Z"),
                        "optimeDurableDate" : ISODate("2020-11-10T08:56:24Z"),
                        "lastHeartbeat" : ISODate("2020-11-10T08:56:25.291Z"),
                        "lastHeartbeatRecv" : ISODate("2020-11-10T08:56:25.030Z"),
                        "pingMs" : NumberLong(0),
                        "lastHeartbeatMessage" : "",
                        "syncingTo" : "c4-mc-buffer-db41.bj:28042",
                        "syncSourceHost" : "c4-mc-buffer-db41.bj:28042",
                        "syncSourceId" : 1,
                        "infoMessage" : "",
                        "configVersion" : 3
                }
        ],
        "ok" : 1,
        "operationTime" : Timestamp(1604998584, 1),
        "$clusterTime" : {
                "clusterTime" : Timestamp(1604998584, 1),
                "signature" : {
                        "hash" : BinData(0,"Sx7IW3xyv17MwDyskTFJOOQ8IeU="),
                        "keyId" : NumberLong("6856584343653974019")
                }
        }
}
glc-test:PRIMARY> 

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