Execute database migrations after a service become healthy

Flywait is a container to execute migrations after a service become healthy. It uses Flyway and wait-for-healthy.

How to use this image

docker run ./wait-for-healthy -t 60 http://httpbin:80/status/200 -- flyway -url=jdbc:postgresql://database/test -user=test -password=test -connectRetries=60 migrate

With docker-compose

version: '3'

services:
  database:
    image: postgres
    restart: unless-stopped
    environment:
      POSTGRES_USER: test
      POSTGRES_PASSWORD: test
      POSTGRES_DB: test
    ports:
      - 5432:5432
    healthcheck:
      test: ["CMD", "pg_isready", "-U", "test"]
      interval: 5s
      timeout: 5s
      retries: 5
  flywait:
    image: ninjaneers/flywait:latest
    restart: on-failure
    command: ./wait-for-healthy -t 60 http://httpbin:80/status/200 -- flyway -url=jdbc:postgresql://database/test -user=test -password=test -connectRetries=60 migrate
    depends_on:
      - httpbin
    volumes:
      - ./migrations:/flyway/sql
  httpbin:
    image: kennethreitz/httpbin
    # sleep for 10 seconds to simulate slow startup
    command: sh -c 'sleep 10 && gunicorn -b 0.0.0.0:80 httpbin:app -k gevent'
    ports:
      - 80:80