这篇文章主要介绍“MongoDB的JSON格式日志是什么”，在日常操作中，相信很多人在MongoDB的JSON格式日志是什么问题上存在疑惑，小编查阅了各式资料，整理出简单好用的操作方法，希望对大家解答”MongoDB的JSON格式日志是什么”的疑惑有所帮助！接下来，请跟着小编一起来学习吧！

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从4.4版本开始，MongoDB的mongo和mongos日志文件格式采用了JSON格式，更容易分析、解析。在此之前和其他日志文件格式一样，纯文本输出。

4.4日志格式

JSON格式更清晰，也更细分析、解析，非常方便。

{"t":{"$date":"2020-08-31T16:23:50.984+08:00"},"s":"I",  "c":"CONTROL",  "id":23285,   "ctx":"main","msg":"Automatically disabling TLS 1.0, to force-enable TLS 1.0 specify --
sslDisabledProtocols 'none'"}
{"t":{"$date":"2020-08-31T16:23:50.987+08:00"},"s":"W",  "c":"ASIO",     "id":22601,   "ctx":"main","msg":"No TransportLayer configured during NetworkInterface startup"}
{"t":{"$date":"2020-08-31T16:23:50.987+08:00"},"s":"I",  "c":"NETWORK",  "id":4648601, "ctx":"main","msg":"Implicit TCP FastOpen unavailable. If TCP FastOpen is required, set
 tcpFastOpenServer, tcpFastOpenClient, and tcpFastOpenQueueSize."}
{"t":{"$date":"2020-08-31T16:23:50.988+08:00"},"s":"I",  "c":"STORAGE",  "id":4615611, "ctx":"initandlisten","msg":"MongoDB starting","attr":{"pid":5836,"port":27017,"dbPath"
:"/usr/local/mongo4.4.0/data/db","architecture":"64-bit","host":"lei"}}
{"t":{"$date":"2020-08-31T16:23:50.988+08:00"},"s":"I",  "c":"CONTROL",  "id":23403,   "ctx":"initandlisten","msg":"Build Info","attr":{"buildInfo":{"version":"4.4.0","gitVer
sion":"563487e100c4215e2dce98d0af2a6a5a2d67c5cf","openSSLVersion":"OpenSSL 1.0.1e-fips 11 Feb 2013","modules":[],"allocator":"tcmalloc","environment":{"distmod":"rhel70","dis
tarch":"x86_64","target_arch":"x86_64"}}}}
{"t":{"$date":"2020-08-31T16:23:50.988+08:00"},"s":"I",  "c":"CONTROL",  "id":51765,   "ctx":"initandlisten","msg":"Operating System","attr":{"os":{"name":"CentOS Linux relea
se 7.5.1804 (Core) ","version":"Kernel 3.10.0-862.el7.x86_64"}}}
{"t":{"$date":"2020-08-31T16:23:50.988+08:00"},"s":"I",  "c":"CONTROL",  "id":21951,   "ctx":"initandlisten","msg":"Options set by command line","attr":{"options":{"config":"
/etc/mongo.conf","net":{"bindIp":"0.0.0.0","maxIncomingConnections":100,"port":27017},"processManagement":{"fork":true},"security":{"authorization":"enabled"},"storage":{"dbP
ath":"/usr/local/mongo4.4.0/data/db","engine":"wiredTiger","journal":{"enabled":true}},"systemLog":{"destination":"file","logAppend":true,"path":"/usr/local/mongo4.4.0/logs/m
ongodb.log"}}}}
{"t":{"$date":"2020-08-31T16:23:50.989+08:00"},"s":"E",  "c":"STORAGE",  "id":20557,   "ctx":"initandlisten","msg":"DBException in initAndListen, terminating","attr":{"error"
:"NonExistentPath: Data directory /usr/local/mongo4.4.0/data/db not found. Create the missing directory or specify another path using (1) the --dbpath command line option, or
 (2) by adding the 'storage.dbPath' option in the configuration file."}}
{"t":{"$date":"2020-08-31T16:23:50.989+08:00"},"s":"I",  "c":"NETWORK",  "id":20562,   "ctx":"initandlisten","msg":"Shutdown: going to close listening sockets"}
{"t":{"$date":"2020-08-31T16:23:50.989+08:00"},"s":"I",  "c":"-",        "id":20520,   "ctx":"initandlisten","msg":"Stopping further Flow Control ticket acquisitions."}
{"t":{"$date":"2020-08-31T16:23:50.989+08:00"},"s":"I",  "c":"CONTROL",  "id":20565,   "ctx":"initandlisten","msg":"Now exiting"}
{"t":{"$date":"2020-08-31T16:23:50.989+08:00"},"s":"I",  "c":"CONTROL",  "id":23138,   "ctx":"initandlisten","msg":"Shutting down","attr":{"exitCode":100}}

KEY缩写：

{
  "t": , // timestamp
  "s": , // severity
  "c": , // component
  "ctx": , // context
  "id": , // unique identifier
  "msg": , // message body
  "attr":