TCPSnitch Web

Web app live at www.tcpsnitch.org to centralize, visualize and analyze the traces gathered by tcpsnitch, a tracing tool designed to investigate the interactions between an application and the TCP/IP stack.

Stack overview

• Ruby 2.3 (MongoDB driver does not support 2.4)
• Rails 5
• Puma
• Nginx
• MongoDB 3.4
• Postgresql
• Redis for storing background jobs
• Memcached for fragment caching

Main gems

• Mongoid ORM framework for MongoDB.
• Sidekiq for background jobs processing.
• Carrierwave for file uploads.
• Chartkick to create charts.
• Activeadmin for administration interface.
• Whenever for managing Cron jobs.
• Capistrano for deployment.

Sidekiq jobs

We currently use 4 priority queues to organize the background jobs:

• default, used for trace import jobs (archive import and socket trace import).
• low, xlow, and xxlow to compute statistics on app traces, process traces and socket traces respectively.

Database

Currently, the rake db:seed task is always executed on deploy. It destroys all Stats and StatCategories before reseeding them. This is temporary.