It is the only talk I have jot notes

Why we need to log everything?

Log is the final fallback of any unexpected requirements:

• Provide support for new business decide which does not know when develop the system
• Audit

Log system structure

• Loggers
  • Filter
  • Handlers
    • Filter
    • Formatter

Components

• Logger
  • A channel of a set of log events
  • Classified by the nature of log events
  • Examples
    • Database related logger
    • Feature related logger
    • Web access logger
• Filter
  • Filter out unwant events
    • log levels (usually 5 levels) are handled here
  • Sanitize data
    • Remove sensitive data (e.g. Password)
    • Mask personal data (Email, phone etc)
• Handler
  • Dispatch logging event to different destination
  • Can integrate bug tracker inside logger
  • Types
    • Log file
    • External log services
      • Papertrail, Bugsnag, Slack etc
• Formatter
  • The function which transform log events into different format
    • JSON, XML, TXT etc

logs and reporting

• Log important data change
• Log request/response
  • Can use log to check check slow query
• Define a fixed format or logs
• Logging code should have no side effect
• Integrate bug tracker inside logger