DjangoをDocker Composeで動かすときにDBが起動するまで待つ

docker-compose.yml

    command: ["./wait-for-db.sh", "--", "python", "manage.py", "runserver", "0.0.0.0:8000"]

wait-for-db.sh

#!/bin/bash

set -e

shift
cmd="$@"

until ./manage.py inspectdb; do
  >&2 echo "Database is unavailable - sleeping"
  sleep 1
done

>&2 echo "Database is up - executing command"
exec $cmd