Logging

Traffic Server generates log files that contain information about every request it receives and every error it detects. This chapter will examine the various logging features: from how to configure logging destinations, defining custom logging formats, establishing logfile rotation, and more. Common configuration scenarios are also provided.

• Understanding Traffic Server Logs
  • Enabling Logs
  • Log Types
• Log Destinations
  • Local Logging
  • Remote Logging
• Formatting Log Files
  • Defining Formats
  • Log Fields
  • Line Length
  • Log Field Slicing
• Logging Cache Results
  • Interpreting Cache Results
  • Cache Result Codes
  • Cache Result Sub-Codes
• Log Rotation and Retention
  • Rotation Options
  • Retention Options
• Log Filters
• Configuration Examples
  • Online Event Log Builder
  • Emulating Other HTTP Server Formats
  • Hourly Rotated Squid Proxy Logs
  • Summarizing Number of Requests and Total Bytes Sent Every 10 Seconds
  • Dual Output to Compact Binary Logs and ASCII Pipes
  • Filtering Events to ASCII Pipe for Alerting
  • Configuring ASCII Pipe Buffer Size
  • Summarizing Origin Responses by Hour