getLog_MonogDB 中文网

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行为
例子

getLog¶

getLog是一个管理命令，它返回最近的1024个记录的mongod事件。不从日志文件读取日志数据。相反，它从已记录事件的RAM缓存中读取数据。要运行，请使用数据库上的方法。getLog mongodmongodgetLogdb.runCommand( { command } )admin

该getLog命令具有以下语法：

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{ getLog: <value> }

可能的值为getLog：

global -返回所有最近的日志条目的组合输出。
rs-如果mongod属于副本集的一部分，则getLog返回与副本集活动相关的最新通知。
startupWarnings- 从当前进程开始时返回可能包含MongoDB日志中的错误或警告的日志。如果mongod启动时没有警告，则此筛选器可能会返回一个空数组。

返回值：	包含日志事件数组和日志事件`log`数为的文档`totalLinesWritten`。

行为¶

指定*以getLog返回可用日志过滤器的列表mongod。

从MongoDB 4.2开始，getLog将截断任何包含1024个以上字符的事件。在早期版本中， getLog在512个字符后截断。

例子¶

检索可用的日志筛选¶

以下操作返回可用的日志过滤器以传递给 getLog

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db.adminCommand( { getLog: "*" } )

该操作返回以下文档：

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{ "names" : [ "global", "rs", "startupWarnings" ], "ok" : 1 }

检索日志最新事件¶

以下操作将检索以下global事件的最新事件： mongod

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db.adminCommand( { getLog : "global" } )

该操作返回类似于以下内容的文档：

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{
   "totalLinesWritten" : <num>,
   "log" : [
      "2018-12-05T12:00:51.651-0500 I CONTROL  [initandlisten] MongoDB starting : pid=51825 port=27019 dbpath=/data/Reporting Cluster Data/ShardA/Member00000-000000-1 64-bit host=kays-mac-mini.local",
      "2018-12-05T12:00:51.652-0500 I CONTROL  [initandlisten] db version v4.2.0",
      "2018-12-05T12:00:51.653-0500 I CONTROL  [initandlisten] git version: 322fcf0ee10ea6e27360cf6699e9ff98fb907ef6",
      "2018-12-05T12:00:51.654-0500 I CONTROL  [initandlisten] allocator: system",
      "2018-12-05T12:00:51.654-0500 I CONTROL  [initandlisten] modules: enterprise ",
      "2018-12-05T12:00:51.655-0500 I CONTROL  [initandlisten] build environment:",
      "2018-12-05T12:00:51.656-0500 I CONTROL  [initandlisten]     distarch: x86_64",
      "2018-12-05T12:00:51.657-0500 I CONTROL  [initandlisten]     target_arch: x86_64",

      ...

      "2018-12-05T12:00:57.151-0500 I INITSYNC [replication-0] CollectionCloner ns:test.hugeindex finished cloning with status: OK",
      "2018-12-05T12:00:57.198-0500 I INITSYNC [replication-0] Finished cloning data: OK. Beginning oplog replay.",
      "2018-12-05T12:00:57.200-0500 I INITSYNC [replication-1] No need to apply operations. (currently at { : Timestamp(1544029250, 1) })",
      "2018-12-05T12:00:57.201-0500 I SHARDING [replication-0] Marking collection local.temp_oplog_buffer as collection version: <unsharded>",
      "2018-12-05T12:00:57.203-0500 I SHARDING [replication-0] Marking collection local.replset.oplogTruncateAfterPoint as collection version: <unsharded>",
      "2018-12-05T12:00:57.204-0500 I INITSYNC [replication-0] Finished fetching oplog during initial sync: CallbackCanceled: error in fetcher batch callback: oplog fetcher is shutting down. Last fetched optime and hash: { ts: Timestamp(0, 0), t: -1 }[0]",
      "2018-12-05T12:00:57.205-0500 I INITSYNC [replication-0] Initial sync attempt finishing up.",
      "2018-12-05T12:00:57.206-0500 I INITSYNC [replication-0] Initial Sync Attempt Statistics: { failedInitialSyncAttempts: 0, maxFailedInitialSyncAttempts: 10,
initialSyncStart: new Date(1544029253464), initialSyncAttempts: [], fetchedMissingDocs: 0, appliedOps: 0, initialSyncOplogStart: Timestamp(1544029250, 1),
initialSyncOplogEnd: Timestamp(1544029250, 1), databases: { databasesCloned: 5, admin: { collections: 4, clonedCollections: 4, start: new Date(1544029253838),
end: new Date(1544029255537), elapsedMillis: 1699, admin.system.roles: { documentsToCopy: 4, documentsCopied: 4, indexes: 2, fetchedBatches: 1,
start: new Date(1544029253840), end: new Date(1544029254110), elapsedMillis: 270, receivedBatches: 1 },
admin.system.users: { documentsToCopy: 13, documentsCopied: 13, indexes: 2, fetchedBatches: 1, start: new Date(1544029254110),
end: new Date(1544029254305), elapsedMillis: 195, receivedBatches: 1 }, admin.system.version: { documentsToCopy: 2, documentsCopied: 2, indexes: 1,
fetchedBatches: 1, start: new D",
      "2018-12-05T12:00:57.208-0500 I STORAGE  [replication-0] Finishing collection drop for local.temp_oplog_buffer (d547b85d-67cf-4721-86b1-1da5ee23845d).",
      "2018-12-05T12:00:57.244-0500 I STORAGE  [replication-0] Triggering the first stable checkpoint. Initial Data: Timestamp(1544029250, 1) PrevStable: Timestamp(0, 0) CurrStable: Timestamp(1544029250, 1)",
      "2018-12-05T12:00:57.246-0500 I INITSYNC [replication-0] initial sync done; took 3s.",

   ],
   "ok" : 1
}

突出显示的行超过1024个字符，因此被截断。