supavisor.yml

supavisor:
  pidfile: /tmp/supavisor.pid
  socket: /tmp/supavisor.sock
  log_level: debug  # Options: debug, info (default), warn, error
  # logfile: /tmp/supavisor.log
  # log_format: text  # Options: text (default), json

programs:
  process1:
    command: /bin/sleep 5
    autostart: true
    autorestart: always
    stdout_logfile: /tmp/process1.log
    stderr_logfile: /tmp/process1.log

  process2:
    command: /bin/sleep 1d
    autostart: true
    autorestart: never
    depends_on:
      - process1
    stdout_logfile: /tmp/process2.log
    stderr_logfile: /tmp/process2.log

  process3:
    command: /bin/sleep 15
    autostart: true
    autorestart: always
    stdout_logfile: /tmp/process3.log
    stderr_logfile: /tmp/process3.log

  # Stands in for a database: its process is up at once, but it cannot serve
  # until it has finished bootstrapping ten seconds later. The marker file is
  # what a real one would answer pg_isready with.
  db:
    command: /bin/sh -c 'rm -f /tmp/db.ready; sleep 10; touch /tmp/db.ready; sleep 1d'
    autostart: true
    autorestart: always
    health_check:
      exec: /bin/sh -c 'test -f /tmp/db.ready'
      # Or, for a real database:
      #   exec: pg_isready -q -h 127.0.0.1
      #   tcp: 127.0.0.1:5432
      #   http: http://127.0.0.1:8080/readyz
      interval: 1s
      timeout: 2s
      retries: 3
      # Covers the bootstrap, so the wait reads as STARTING rather than
      # UNHEALTHY while the database is still coming up
      start_period: 15s
    stdout_logfile: /tmp/db.log
    stderr_logfile: /tmp/db.log

  # Waits for the check to pass, not merely for the process. `sctl status` shows
  # it STOPPED while db is RUNNING but STARTING, then RUNNING once db is HEALTHY.
  api:
    command: /bin/sleep 1d
    autostart: true
    autorestart: never
    depends_on:
      db:
        condition: healthy
    stdout_logfile: /tmp/api.log
    stderr_logfile: /tmp/api.log

  # The list form is unchanged: this one only needs the process to be up, so it
  # starts about ten seconds before api does.
  db-logs:
    command: /bin/sleep 1d
    autostart: true
    autorestart: never
    depends_on:
      - db
    stdout_logfile: /tmp/db-logs.log
    stderr_logfile: /tmp/db-logs.log