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import argparse |
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import psycopg2 |
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import sys |
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import time |
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if __name__ == '__main__': |
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arg_parser = argparse.ArgumentParser() |
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arg_parser.add_argument('--db_host', required=True) |
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arg_parser.add_argument('--db_port', required=True) |
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arg_parser.add_argument('--db_user', required=True) |
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arg_parser.add_argument('--db_password', required=True) |
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arg_parser.add_argument('--timeout', type=int, default=5) |
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args = arg_parser.parse_args() |
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start_time = time.time() |
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while (time.time() - start_time) < args.timeout: |
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try: |
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conn = psycopg2.connect(user=args.db_user, host=args.db_host, port=args.db_port, password=args.db_password, dbname='postgres') |
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error = '' |
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break |
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except psycopg2.OperationalError as e: |
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error = e |
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else: |
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conn.close() |
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time.sleep(1) |
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if error: |
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print("Database connection failure: %s" % error, file=sys.stderr) |
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sys.exit(1) |