66 lines
2.2 KiB
Python
66 lines
2.2 KiB
Python
"""passbook management command to bootstrap"""
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from argparse import REMAINDER
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from subprocess import Popen # nosec
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from sys import stderr, stdin, stdout
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from sys import exit as _exit
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from time import sleep
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from typing import List
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from django.core.management.base import BaseCommand
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from django.db import connection
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from django.db.utils import OperationalError
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from django_redis import get_redis_connection
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from redis.exceptions import ConnectionError as RedisConnectionError
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from structlog import get_logger
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LOGGER = get_logger()
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class Command(BaseCommand):
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"""Bootstrap passbook, ensure Database and Cache are
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reachable, and directories are writeable"""
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help = """Bootstrap passbook, ensure Database and Cache are
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reachable, and directories are writeable"""
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def add_arguments(self, parser):
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parser.add_argument("command", nargs=REMAINDER)
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def check_database(self) -> bool:
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"""Return true if database is reachable, false otherwise"""
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try:
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connection.cursor()
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LOGGER.info("Database reachable")
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return True
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except OperationalError:
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LOGGER.info("Database unreachable")
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return False
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def check_cache(self) -> bool:
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"""Return true if cache is reachable, false otherwise"""
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try:
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con = get_redis_connection("default")
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con.ping()
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LOGGER.info("Cache reachable")
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return True
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except RedisConnectionError:
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LOGGER.info("Cache unreachable")
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return False
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def handle(self, *args, **options):
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LOGGER.info("passbook bootstrapping...")
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should_check = True
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while should_check:
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should_check = not (self.check_database() and self.check_cache())
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sleep(1)
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LOGGER.info("Dependencies are up, starting command...")
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commands: List[str] = options.get("command", ["exit", "1"])
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proc = Popen(args=commands, stdout=stdout, stderr=stderr, stdin=stdin) # nosec
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try:
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proc.wait()
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_exit(proc.returncode)
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except KeyboardInterrupt:
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LOGGER.info("Killing process")
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proc.kill()
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_exit(254)
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