market-data-service/docker/wait-for-db.sh

#!/bin/sh
set -e

# Wait for PostgreSQL to be ready
# Usage: wait-for-db.sh [host] [port] [user] [database]

host="${DB_HOST:-db}"
port="${DB_PORT:-5432}"
user="${DB_USER:-postgres}"
database="${DB_NAME:-financial_data}"
max_attempts=30
attempt=0

echo "Waiting for PostgreSQL to be ready at ${host}:${port}..."

while [ $attempt -lt $max_attempts ]; do
    if PGPASSWORD="${DB_PASSWORD}" pg_isready -h "$host" -p "$port" -U "$user" -d "$database" >/dev/null 2>&1; then
        echo "PostgreSQL is ready!"
        exit 0
    fi
    
    attempt=$((attempt + 1))
    echo "Attempt $attempt/$max_attempts: PostgreSQL is not ready yet. Waiting..."
    sleep 2
done

echo "PostgreSQL failed to become ready after $max_attempts attempts"
exit 1