mongodb 中rs.stauts()命令参数解析
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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),"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","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),"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：
| 字段 | 意义 | 示例值 |
|---|---|---|
set
|
副本集的名称 |
"rs0"
|
date
|
响应生成的时间 |
ISODate("2024-09-14T06:44:36Z")
|
myState
|
当前节点的状态（1: PRIMARY, 2: SECONDARY, 3: RECOVERING等）： 常见的状态包括：
|
1
|
term
|
当前选举周期 |
510
|
lastElectionReason
|
最近一次选举的原因 |
"electionTimeout"
|
members
|
副本集成员的详细信息 | 数组，包含各个节点的信息 |
health
|
节点的健康状态（1: 健康, 0: 不健康） |
1
|
stateStr
|
节点的状态描述（如 PRIMARY, SECONDARY, ROLLBACK等） |
"SECONDARY"
|
uptime
|
节点的运行时间（秒） |
987
|
optime
|
最近一次操作的时间戳 |
Timestamp(1726197065, 1)
|
optimeDurable
|
最近一次持久化操作的时间戳 |
Timestamp(1726197065, 1)
|
optimeDate
|
最近一次操作的日期 |
ISODate("2024-09-13T03:11:05Z")
|
optimeDurableDate
|
最近一次持久化操作的日期 |
ISODate("2024-09-13T03:11:05Z")
|
lastHeartbeat
|
最近一次心跳信号的时间 |
ISODate("2024-09-14T06:44:34.930Z")
|
lastHeartbeatRecv
|
最近一次接收到心跳信号的时间 |
ISODate("1970-01-01T00:00:00Z")
|
pingMs
|
节点的延迟（毫秒） |
NumberLong(1)
|
lastHeartbeatMessage
|
最近一次心跳的消息 |
""
|
syncingTo
|
当前节点正在同步的目标节点 |
""
|
syncSourceHost
|
当前节点的同步源主机 |
""
|
syncSourceId
|
当前节点的同步源ID |
-1
|
infoMessage
|
额外的信息消息 |
""
|
configVersion
|
配置版本号 |
1829326
|
$clusterTime
|
集群时间信息 | 包含
clusterTime
和
signature
|
operationTime
|
最近一次操作的时间 |
Timestamp(1726296270, 1)
|
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。