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#!/bin/bash
set -o errexit
set -o pipefail
set -o nounset
# N.B. If only .env files supported variable expansion...
export CELERY_BROKER_URL="${REDIS_URL}"
if [ -z "${POSTGRES_USER}" ]; then
base_postgres_image_default_user='postgres'
export POSTGRES_USER="${base_postgres_image_default_user}"
fi
export DATABASE_URL="postgres://${POSTGRES_USER}:${POSTGRES_PASSWORD}@${POSTGRES_HOST}:${POSTGRES_PORT}/${POSTGRES_DB}"
python << END
import sys
import time
import psycopg
suggest_unrecoverable_after = 30
start = time.time()
while True:
try:
psycopg.connect(
dbname="${POSTGRES_DB}",
user="${POSTGRES_USER}",
password="${POSTGRES_PASSWORD}",
host="${POSTGRES_HOST}",
port="${POSTGRES_PORT}",
)
break
except psycopg.OperationalError as error:
sys.stderr.write("Waiting for PostgreSQL to become available...\n")
if time.time() - start > suggest_unrecoverable_after:
sys.stderr.write(" This is taking longer than expected. The following exception may be indicative of an unrecoverable error: '{}'\n".format(error))
time.sleep(1)
END
>&2 echo 'PostgreSQL is available'
exec "$@"
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