Phoenix Ops

This covers the production operations checklist for Phoenix apps: releases, runtime configuration in config/runtime.exs, libcluster strategies for multi-node PubSub and Presence, telemetry setup with OpenTelemetry, and endpoint hardening (HTTPS, rate limiting, CORS). It walks through asset deployment with mix assets.deploy, Oban for background jobs, and deployment patterns for containers and systemd. The health check and observability sections are practical. Most useful when you're moving a Phoenix app from development to production or debugging clustering issues. The common pitfalls list at the end is worth reading first, especially the note about PHX_SERVER=true and avoiding compile-time secrets.

skills.sh installs: 341
GitHub stars: 79
last updated: Aug 21, 2026

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Install

$ npx -y skills add bobmatnyc/claude-mpm-skills --skill phoenix-ops --agent claude-code

Installs into .claude/skills of the current project.

Files

Phoenix Operations and Deployment (Elixir/BEAM)

Production-ready Phoenix apps rely on releases, runtime configuration, telemetry, clustering, and secure endpoints. The BEAM enables rolling restarts and supervision resilience when configured correctly.

Releases and Runtime Config

MIX_ENV=prod PHX_SERVER=true mix assets.deploy
MIX_ENV=prod mix release
_build/prod/rel/my_app/bin/my_app eval "IO.puts(:os.type())"
_build/prod/rel/my_app/bin/my_app start

config/runtime.exs for env-driven settings:

config :my_app, MyApp.Repo,
  url: System.fetch_env!("DATABASE_URL"),
  pool_size: String.to_integer(System.get_env("POOL_SIZE", "10")),
  ssl: true

config :my_app, MyAppWeb.Endpoint,
  url: [host: System.fetch_env!("PHX_HOST"), port: 443, scheme: "https"],
  http: [ip: {0,0,0,0}, port: String.to_integer(System.get_env("PORT", "4000"))],
  secret_key_base: System.fetch_env!("SECRET_KEY_BASE"),
  server: true

Secrets