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    Collection Overview

    마지막 업데이트 시간:2024-01-20 17:14:28
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      Overview

      CLS provides log collection clients that allow you to collect your application logs and import them into CLS through APIs or SDKs. Currently, CLS requires logs to be uploaded in a structured manner as key-value pairs.

      Log Structuring

      The structuring of logs is to store your log data on the CLS platform in key-value format. Structured logs can be searched for, analyzed, and shipped based on specified keys. CLS allows you to report structured data directly. For more information, see the following:
      For example, a local raw log is as follows:
      10.20.20.10;[Tue Jan 22 14:49:45 CST 2019 +0800];GET /online/sample HTTP/1.1;127.0.0.1;200;647;35;http://127.0.0.1/
      Specify that the log is parsed by separator and select semicolon (;) as the separator. Then the log can be parsed into multiple field groups and each group is organized in key-value pairs. A key name is defined for each key as follows:
      IP: 10.20.20.10
      time: [Tue Jan 22 14:49:45 CST 2019 +0800]
      request: GET /online/sample HTTP/1.1
      host: 127.0.0.1
      status: 200
      length: 647
      bytes: 35
      referer: http://127.0.0.1/
      LogListener provides various parsing modes, in which reported logs with full text in a single line and full text in multi lines are both structured. LogListener adds __CONTENT__ as a key and uses the original text as the value by default. The key-value pair is as follows:
      LogListener Parsing Mode
      Key
      Description
      Full text in a single line/Full text in multi lines
      __CONTENT__
      __CONTENT__ is the key name by default.
      JSON format
      Name in the JSON file
      The name and value in the original text of the JSON log are used as a key-value pair.
      Separator format
      Custom
      After dividing fields using separators, you need to define a key name for each field group.
      Full regular expression
      Custom
      After extracting fields based on a regular expression, you need to define a key name for each field group.

      Collection Methods

      CLS provides multiple methods for data collection:
      Collection Method
      Description
      API
      You can call CLS APIs to upload structured logs to CLS. For more information, see Uploading Log via API.
      SDK
      You can use SDKs to upload structured logs to CLS. For more information, see Collection via SDK.
      LogListener client
      LogListener is a log collection client provided by CLS. You can quickly access CLS by simply configuring LogListener in the console. For more information, see LogListener Use Process.
      A comparison of the collection methods is as follows:
      Category
      Collection via LogListener
      Collection via API
      Code modification
      Provides a non-intrusive collection method for applications, without code modification.
      Reports logs only after modifying application code.
      Resumable upload
      Supports resumable upload of logs.
      Automatically implemented by code.
      Retransmission upon failure
      Provides an inherent retry mechanism.
      Automatically implemented by code.
      Local cache
      Supports local cache, ensuring data integrity during peak hours.
      Automatically implemented by code.
      Resource occupation
      Occupies resources such as memory and CPU resources.
      Occupies no additional resources.

      Accessing Log Sources

      You can access different log sources in different ways. For more information, see the following tables:
      Log source environment
      System Environment
      Recommended Access Method
      Linux/Unix
      LogListener collection / Upload over Kafka / Log upload via API
      Windows
      iOS/Android/Web
      Tencent Cloud service logs
      For more information, see Tencent Cloud Service Log Access.
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