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  1. Documentation
  2. DOCS-12424

Docs for SERVER-37823: Server Side Traffic Capture



    • Task
    • Status: Blocked
    • Major - P3
    • Resolution: Unresolved
    • None
    • 4.1.8
    • manual, Server
    • None




      Documentation for MongoTrafficReader

      Preliminary docs changes: https://github.com/tkaye407/docs/commit/20369b1e89a3b475ac2dd2bcc30c3fd76de99210

      There are two sections of the documentation that need to be edited / added

      1. Add Commands startRecordingTraffic and stopRecordingTraffic
      mongod must be run with --setParameter="trafficRecordingDirectory=..."
      dir above must exist and cannot have ~/ stuff
      Only on admin database
      Must have clusterManager role (hostManager)
      Issues warning: *** important
      Warning: the recording file contains unencrypted user traffic, we recommend that you limit retention of this file and store it on an encrypted filesystem volume.
      Comment about the performance?

      Parameters for startRecordingTraffic():
      a. filename: string --> required
      b. bufferSize: int64 --> default = 134217728 (128MiB)
      c. maxFileSize: int64 --> default = 4294967296 (4GiB)

      returns any errors that may have happened while recording

      2. Server Sytatus New Fields:
      "running" : <boolean>
      "bufferSize" : NumberLong(<num>)
      "bufferedBytes" : NumberLong(<num>)
      "recordingFile" : <string>
      "maxFileSize" : NumberLong(<num>)
      "currentFileSize" : NumberLong(<num>)

      Engineering Ticket Description:

      Provide a mechanism for capturing client traffic sent to a mongo[d|s] process by observing and copying the messages after they’ve transited the transport layer – i.e. after operating system ::recv() and subsequent TLS decryption. This allows the use of mongoreplay and other tee like functionality to be used when TLS is enabled for client/server communication.

      Scope of changes

      *note:* mongoreplay will be updated to be able to read the captured traffic file (TOOLS-2201) For now, will only add a little blurb. When TOOLS-2201 finishes, will need to revamp the mongoreplay page.

      • source/reference/built-in-roles.txt
      • source/reference/command/serverStatus.txt
      • source/reference/command/startRecordingTraffic.txt
      • source/reference/command/stopRecordingTraffic.txt
      • source/reference/parameters.txt
      • source/reference/program/mongoreplay.txt (More to come when TOOLS-2201 completes – See DOCS-12506)
      • source/release-notes/4.2.txt
      • redirects

      Impact to Other Docs

      probably Atlas

      MVP (Work and Date)

      Resources (Scope or Design Docs, Invision, etc.)


        Issue Links



              kay.kim@mongodb.com Kay Kim (Inactive)
              kay.kim@mongodb.com Kay Kim (Inactive)
              Andrew Feierabend Andrew Feierabend (Inactive)
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                3 years, 14 weeks, 5 days ago