mongodb 中rs.stauts()命令参数解析

目录

• 使用场景

rs.status()命令用于获取MongoDB副本集的状态信息。它提供了关于副本集中各个节点的详细信息，包括节点的健康状况、角色、选举状态等。

　　以下是查看一个mongo集群状态返回的参数：

rs0:PRIMARY> rs.status()
{
        "set" : "rs0",
        "date" : ISODate("2024-09-14T06:44:36.882Z"),
        "myState" : 1,
        "term" : NumberLong(510),
        "syncingTo" : "",
        "syncSourceHost" : "",
        "syncSourceId" : -1,
        "heartbeatIntervalMillis" : NumberLong(2000),
        "majorityVoteCount" : 2,
        "writeMajorityCount" : 2,
        "optimes" : {
                "lastCommittedOpTime" : {
                        "ts" : Timestamp(0, 0),
                        "t" : NumberLong(-1)
                },
                "lastCommittedwallTime" : ISODate("1970-01-01T00:00:00Z"),
                "appliedOpTime" : {
                        "ts" : Timestamp(1726296270, 1),
                        "t" : NumberLong(510)
                },
                "durableOpTime" : {
                        "ts" : Timestamp(1726296270, 1),
                        "t" : NumberLong(510)
                },
                "lastAppliedWallTime" : ISODate("2024-09-14T06:44:30.859Z"),
                "lastDurableWallTime" : ISODate("2024-09-14T06:44:30.859Z")
        },
        "lastStableRecoveryTimestamp" : Timestamp(1725300368, 3),
        "lastStableCheckpointTimestamp" : Timestamp(1725300368, 3),
        "electionCandidateMetrics" : {
                "lastElectionReason" : "electionTimeout",
                "lastElectionDate" : ISODate("2024-09-14T06:28:20.630Z"),
                "electionTerm" : NumberLong(510),
                "lastCommittedOpTimeAtElection" : {
                        "ts" : Timestamp(0, 0),
                        "t" : NumberLong(-1)
                },
                "lastSeenOpTimeAtElection" : {
                        "ts" : Timestamp(1726284227, 1),
                        "t" : NumberLong(509)
                },
                "numVotesNeeded" : 2,
                "priorityAtElection" : 2,
                "electionTimeoutMillis" : NumberLong(10000),
     编程           "numCatchUpOps" : NumberLong(0),
                "newTermStartDate" : ISODate("2024-09-14T06:28:20.830Z")
        },
        "members" : [
                {
                        "_id" : 0,
                        "name" : "mongo1:27017",
                        "health" : 1,
                        "state" : 9,
                        "stateStr" : "ROLLBACK",
                        "uptime" : 987,
                        "optime" : {
                                "ts" : Timestamp(1726197065, 1),
                                "t" : NumberLong(505)
                        },
                        "optimeDurable" : {
                                "ts" : Timestamp(1726197065, 1),
                                "t" : NumberLong(505)
                        },
                        "optimeDate" : ISODate("2024-09-13T03:11:05Z"),
                        "optimeDurableDate" : ISODate("2024-09-13T03:11:05Z"),
                        "lastHeartbeat" : ISODate("2024-09-14T06:44:35.841Z"),
                        "lastHeartbeatRecv" : ISODate("2024-09-14T06:44:36.665Z"),
                        "pingMs" : NumberLong(0),
                        "lastHeartbeatMessage" : "",
                        "syncingTo" : "mongo2:27017",
                        "syncSourceHost" : "mongo2:27017",
                     www.devze.com   "syncSourceId" : 1,
                        "infoMessage" : "",
                        "configVersion" : 1950478
                },
                {
                        "_id" : 1,
                        "name" : "mongo2:27017",
                        "health" : 1,
                        "state" : 1,
                        "stateStr" : "PRIMARY",
                        "uptime" : 990,
                        "optime" : {
                                "ts" : Timestamp(1726296270, 1),
                                "t" : NumberLong(510)
                        },
                        "optimeDate" : ISODate("2024-09-14T06:44:30Z"),
                        "syncingTo" : "",
                        "syncSourceHost" : "",
                        "syncSourceId" : -1,
                        "infoMessage" : "",
                        "electionTime" : Timestamp(1726295300, 1),
                        "electionDate" : ISODate("2024-09-14T06:28:20Z"),
                        "configVersion" : 1950478,
                        "self" : true,
                        "lastHeartbeatMessage" : ""
                },
                {
                        "_id" : 2,
                        "name" : "mongo3:27017",
                        "health" : 1,
                        "state" : 2,
                        "stateStr" : "SECONDARY",
                        "uptime" : 987,
                        "optime" : {
                                "ts" : Timestamp(1726197065, 1),
                                "t" : NumberLong(505)
                        },
                        "optimeDurable" : {
                                "ts" : Timestamp(1726197065, 1),
                                "t" : NumberLong(505)
                        },
                        "optimeDate" : ISODate("2024-09-13T03:11:05Z"),
                        "optimeDurableDate" : ISODate("2024-09-13T03:11:05Z"),
                        "lastHeartbeat" : ISODate("2024-09-14T06:44:34.930Z"),
                        "lastHeartbeatRecv" : ISODate("1970-01-01T00:00:00Z"),
                        "pingMs" : NumberLong(1),
     编程                   "lastHeartbeatMessage" : "",
                        "syncingTo" : "",
                        "syncSourceHost" : "",
                        "syncSourceId" : -1,
                        "infoMessage" : "",
                        "configVersion" : 1829326
                }
        ],
        "ok" : 1,
        "$clusterTime" : {
                "clusterTime" : Timestamp(1726296270, 1),
                "signature" : {
                        "hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),
                        "keyId" : NumberLong(0)
                }
        },
        "operationTime" : Timestamp(1726296270, 1)
}
rs0:PRIMARY>

以下是rs.status()响应字段的意义及其对应值的整理：

使用场景

• 故障排查: 当副本集出现问题时，使用rs.status()可以快速定位故障节点。
• 性能监控: 定期检查副本集状态，以确保所有节点正常运行并及时发现性能瓶颈。
• 维护操作: 在进行维护或升级操作前，确认副本集的健康状况。
• 选举监控: 监控选举过程，确保主节点的选举和切换正常进行。

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