Sensu
Sensu
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Sensu

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Last updated on 2016-03-18

About the Book

Sensu Monitoring and Metrics introduces Sensu and explains the concepts behind this increasingly popular monitoring system. Sensu's architecture and concepts are discussed in plain language with chapters dedicated to Checks, Handlers and Metrics. Two appendices cover key references for checks and handlers, and an additional appendix notes common errors, their causes, and how to solve them.

About the Author

John VanDyk
John VanDyk

John VanDyk has previously authored Pro Drupal Development, a book about the Drupal content management system.

Table of Contents

  • Acknowledgements
  • Notes
  • INTRODUCING SENSU
  • COMMON TASKS
    • Sensu Services
    • Viewing Sensu Logs
    • Turning on Debugging
    • Restarting Sensu Components
    • Validating JSON
  • SENSU ARCHITECTURE
    • RabbitMQ
    • Sensu Server
    • Sensu Client
    • Sensu API
    • Redis
  • CONFIGURING COMPONENTS
    • Configuring RabbitMQ
    • Configuring Sensu Client
    • EMBEDDED_RUBY Setting
    • Configuring Sensu Server
    • Configuring Sensu API
    • Configuring Redis
  • CHECKS
    • Standalone Checks
    • Keepalive Checks
    • Regular Checks
    • Command Token Substitution: Overriding Check Parameters
    • Redaction of Passwords and Sensitive Information
    • Safe Mode
    • Aggregate Checks
    • Self-Documenting Checks
    • Running Checks as a Privileged User
  • METRICS
    • Pushing Metrics Into Sensu Client on Port 3030
  • HANDLERS
    • Types of Handlers
    • Testing Pipe Handlers
    • TCP Handler
    • UDP Handler
    • Transport Handler
    • Referring to Multiple Handlers with a Single Name: Handler Sets
  • FILTERS
    • Filtering in Handlers
    • Filtering Events From One Environment
    • Filter Methods in Handlers Derived from Sensu::Handler
    • filter_repeated
    • filter_silenced
    • filter_dependencies
    • Using a Mutator to Prevent Handling
  • MUTATORS
    • Types of Mutators
  • APPENDIX A: KEY REFERENCE FOR CHECK DEFINITIONS
    • aggregate (Boolean)
    • command (string)
    • name (string)
    • handle (Boolean)
    • handler (string)
    • handlers (array)
    • high_flap_threshold (integer)
    • issued (timestamp)
    • low_flap_threshold (integer)
    • publish (Boolean)
    • type (string)
  • APPENDIX B: KEY REFERENCE FOR HANDLER DEFINITIONS
    • command (string)
    • exchange (hash)
    • filter (string)
    • filters (array)
    • handle_flapping (Boolean)
    • handlers (array)
    • mutator (string)
    • severities (array)
    • socket (hash)
    • subdue (hash)
    • timeout (numeric)
    • type (string)
    • Other Keys
  • APPENDIX C: FIREWALL RULES
    • RabbitMQ Server
    • Redis
    • Uchiwa (web-based dashboard)
    • Sensu API
    • Sensu Client
    • Sensu Server

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