ZerobsStack

The 0BS stack is a starting point for building Elixir and Phoenix applications, presented as an Elixir metapackage. It includes the following features:

• Featureflags (via fun_with_flags)
• Prometheus metrics (via telemetry)
• HTTP Client (Using Tesla with included telemetry reporting)
• Featureflags UI and Prometheus metrics on own port for easier securing
• Load shedding via feature flags per controller action ("Drop 50% of all requests to PageController#index")

Planned features

• MQTT subscriber (with instrumentation)
• Rate limiting per route/user

Installation

If available in Hex, the package can be installed by adding zerobs_stack to your list of dependencies in mix.exs:

def deps do
  [
    {:zerobs_stack, "~> 0.1.0"}
  ]
end

Usage

Feature Flags

Run mix copy_featureflags_migrations to add the needed Ecto migrations to your priv/repo/migrations folder.

Load shedding

Add plug ZerobsSTack.LoadShedPlug to the end of the def controller do block in your ApplicationWeb module.

To enable load shedding open your FunWithFlags GUI and add a flag named like elixir_stackerweb_pagecontroller_index_disabled. This would drop Traffic for Elixir.StackerWeb.PageController#index (We downcase the whole module name and replace . with _.)