fly.toml

# Fly.io configuration.
#
# `app` is a placeholder until `fly launch` claims a real name — Fly rewrites
# this file on launch, so set the name there rather than guessing one here.
#
# Two things about this app shape the config:
#
# A sheet lives in the URL fragment and in `localStorage`, never on the server,
# so there is no session state to keep on one machine. No sticky sessions, no
# affinity, and scaling out is just raising the machine count.
#
# The image is large for a web app — roughly 25MB of it is CLDR locale data,
# ICU word-break dictionaries and the JPL ephemeris that `astro` ships. That is
# data the app reads at runtime, not build leftovers, so it cannot be pruned
# from the runner stage.

app = "localize-pad"
primary_region = "syd"
kill_signal = "SIGTERM"

[build]

[env]
  PHX_HOST = "pad.elixir-localize.com"
  PORT = "8080"
  # The locale a sheet opens in when the browser asks for nothing in
  # particular. Every Localize-family app sets this explicitly rather than
  # letting the default drift.
  LOCALIZE_DEFAULT_LOCALE = "en"
  # Machines find each other through Fly's internal DNS. Without this the
  # cluster is a single node and the session sync stops at the machine
  # boundary; see rel/env.sh.eex for the other half.
  DNS_CLUSTER_QUERY = "localize-pad.internal"

[http_service]
  internal_port = 8080
  force_https = true
  auto_stop_machines = "stop"
  auto_start_machines = true
  # Zero is deliberate. Nothing is lost when the last machine stops: sheets are
  # in the browser and shared links carry their own contents, so a cold start
  # costs a few seconds and nothing else.
  min_machines_running = 0
  processes = ["app"]

  [http_service.concurrency]
    type = "connections"
    hard_limit = 1000
    soft_limit = 800

# Every keystroke re-evaluates the sheet over the LiveView socket, so the
# work is small but frequent. 1GB leaves room for the CLDR and dictionary
# data the app holds in memory.
[[vm]]
  size = "shared-cpu-1x"
  memory = "1gb"