使用私有RDS在私有ec2中部署Flask微博

问题描述 投票：0回答：1

对于AWS的一个项目，我正在尝试在ec2上安装一个用flask制作的微博。 目前，该架构包括

  1. 部署在具有 ip 的公共子网中的堡垒主机。
  2. 部署在没有 IP 的私有子网中的 ec2。
  3. 部署在私有子网中的 RDS (Mysql)，无公共访问权限。
  4. 挂载在私有子网的 ec2 上的 EFS。

所有元素都位于同一个 VPC 中。

安全组是

  1. 堡垒主机 - 来自我的 IP 的 SSH(22) 入站规则
  2. EC2 - 来自堡垒主机的 SSH(22) 入站规则和来自 RDS 的 Mysql/Aurora(3306) 入站规则
  3. RDS - 来自私有 EC2 的 Mysql/Aurora(3306) 入站规则
  4. EFS - 来自私有 EC2 的 NFS 入站规则 (2049)

我已经通过 ssh 访问了堡垒，并从堡垒访问了私有子网的 ec2，我已经安装了应用程序所需的软件包。我使用 RDS 访问数据创建了一个 .env(DATABASE_URL=mysql+pymysql://db-user:db-password@db-host:db-port/db- 数据库）并尝试运行 

flask db upgrade
，但我收到了下面的错误。 有什么我错过了或者没有像这样配置的吗？我是 AWS 新手。 谢谢！！！

[2024-02-21 16:35:56,754] INFO in __init__: Microblog startup
Traceback (most recent call last):
  File "/usr/local/lib64/python3.9/site-packages/sqlalchemy/engine/base.py", line 145, in __init__
    self._dbapi_connection = engine.raw_connection()
  File "/usr/local/lib64/python3.9/site-packages/sqlalchemy/engine/base.py", line 3282, in raw_connection
    return self.pool.connect()
  File "/usr/local/lib64/python3.9/site-packages/sqlalchemy/pool/base.py", line 449, in connect
    return _ConnectionFairy._checkout(self)
  File "/usr/local/lib64/python3.9/site-packages/sqlalchemy/pool/base.py", line 1263, in _checkout
    fairy = _ConnectionRecord.checkout(pool)
  File "/usr/local/lib64/python3.9/site-packages/sqlalchemy/pool/base.py", line 712, in checkout
    rec = pool._do_get()
  File "/usr/local/lib64/python3.9/site-packages/sqlalchemy/pool/impl.py", line 282, in _do_get
    return self._create_connection()
  File "/usr/local/lib64/python3.9/site-packages/sqlalchemy/pool/base.py", line 390, in _create_connection
    return _ConnectionRecord(self)
  File "/usr/local/lib64/python3.9/site-packages/sqlalchemy/pool/base.py", line 674, in __init__
    self.__connect()
  File "/usr/local/lib64/python3.9/site-packages/sqlalchemy/pool/base.py", line 901, in __connect
    pool.logger.debug("Error on connect(): %s", e)
  File "/usr/local/lib64/python3.9/site-packages/sqlalchemy/util/langhelpers.py", line 146, in __exit__
    raise exc_value.with_traceback(exc_tb)
  File "/usr/local/lib64/python3.9/site-packages/sqlalchemy/pool/base.py", line 896, in __connect
    self.dbapi_connection = connection = pool._invoke_creator(self)
  File "/usr/local/lib64/python3.9/site-packages/sqlalchemy/engine/create.py", line 643, in connect
    return dialect.connect(*cargs, **cparams)
  File "/usr/local/lib64/python3.9/site-packages/sqlalchemy/engine/default.py", line 616, in connect
    return self.loaded_dbapi.connect(*cargs, **cparams)
  File "/usr/local/lib/python3.9/site-packages/pymysql/connections.py", line 358, in __init__
    self.connect()
  File "/usr/local/lib/python3.9/site-packages/pymysql/connections.py", line 664, in connect
    self._request_authentication()
  File "/usr/local/lib/python3.9/site-packages/pymysql/connections.py", line 954, in _request_authentication
    auth_packet = self._read_packet()
  File "/usr/local/lib/python3.9/site-packages/pymysql/connections.py", line 772, in _read_packet
    packet.raise_for_error()
  File "/usr/local/lib/python3.9/site-packages/pymysql/protocol.py", line 221, in raise_for_error
    err.raise_mysql_exception(self._data)
  File "/usr/local/lib/python3.9/site-packages/pymysql/err.py", line 143, in raise_mysql_exception
    raise errorclass(errno, errval)
pymysql.err.OperationalError: (1049, "Unknown database 'db-final-database'")

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/usr/local/bin/flask", line 8, in <module>
    sys.exit(main())
  File "/usr/local/lib/python3.9/site-packages/flask/cli.py", line 1050, in main
    cli.main()
  File "/usr/local/lib/python3.9/site-packages/click/core.py", line 1078, in main
    rv = self.invoke(ctx)
  File "/usr/local/lib/python3.9/site-packages/click/core.py", line 1688, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/usr/local/lib/python3.9/site-packages/click/core.py", line 1688, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/usr/local/lib/python3.9/site-packages/click/core.py", line 1434, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/usr/local/lib/python3.9/site-packages/click/core.py", line 783, in invoke
    return __callback(*args, **kwargs)
  File "/usr/local/lib/python3.9/site-packages/click/decorators.py", line 33, in new_func
    return f(get_current_context(), *args, **kwargs)
  File "/usr/local/lib/python3.9/site-packages/flask/cli.py", line 357, in decorator
    return __ctx.invoke(f, *args, **kwargs)
  File "/usr/local/lib/python3.9/site-packages/click/core.py", line 783, in invoke
    return __callback(*args, **kwargs)
  File "/usr/local/lib/python3.9/site-packages/flask_migrate/cli.py", line 150, in upgrade
    _upgrade(directory, revision, sql, tag, x_arg)
  File "/usr/local/lib/python3.9/site-packages/flask_migrate/__init__.py", line 111, in wrapped
    f(*args, **kwargs)
  File "/usr/local/lib/python3.9/site-packages/flask_migrate/__init__.py", line 200, in upgrade
    command.upgrade(config, revision, sql=sql, tag=tag)
  File "/usr/local/lib/python3.9/site-packages/alembic/command.py", line 403, in upgrade
    script.run_env()
  File "/usr/local/lib/python3.9/site-packages/alembic/script/base.py", line 583, in run_env
    util.load_python_file(self.dir, "env.py")
  File "/usr/local/lib/python3.9/site-packages/alembic/util/pyfiles.py", line 95, in load_python_file
    module = load_module_py(module_id, path)
  File "/usr/local/lib/python3.9/site-packages/alembic/util/pyfiles.py", line 113, in load_module_py
    spec.loader.exec_module(module)  # type: ignore
  File "<frozen importlib._bootstrap_external>", line 850, in exec_module
  File "<frozen importlib._bootstrap>", line 228, in _call_with_frames_removed
  File "migrations/env.py", line 94, in <module>
    run_migrations_online()
  File "migrations/env.py", line 76, in run_migrations_online
    connection = engine.connect()
  File "/usr/local/lib64/python3.9/site-packages/sqlalchemy/engine/base.py", line 3258, in connect
    return self._connection_cls(self)
  File "/usr/local/lib64/python3.9/site-packages/sqlalchemy/engine/base.py", line 147, in __init__
    Connection._handle_dbapi_exception_noconnection(
  File "/usr/local/lib64/python3.9/site-packages/sqlalchemy/engine/base.py", line 2422, in _handle_dbapi_exception_noconnection
    raise sqlalchemy_exception.with_traceback(exc_info[2]) from e
  File "/usr/local/lib64/python3.9/site-packages/sqlalchemy/engine/base.py", line 145, in __init__
    self._dbapi_connection = engine.raw_connection()
  File "/usr/local/lib64/python3.9/site-packages/sqlalchemy/engine/base.py", line 3282, in raw_connection
    return self.pool.connect()
  File "/usr/local/lib64/python3.9/site-packages/sqlalchemy/pool/base.py", line 449, in connect
    return _ConnectionFairy._checkout(self)
  File "/usr/local/lib64/python3.9/site-packages/sqlalchemy/pool/base.py", line 1263, in _checkout
    fairy = _ConnectionRecord.checkout(pool)
  File "/usr/local/lib64/python3.9/site-packages/sqlalchemy/pool/base.py", line 712, in checkout
    rec = pool._do_get()
  File "/usr/local/lib64/python3.9/site-packages/sqlalchemy/pool/impl.py", line 282, in _do_get
    return self._create_connection()
  File "/usr/local/lib64/python3.9/site-packages/sqlalchemy/pool/base.py", line 390, in _create_connection
    return _ConnectionRecord(self)
  File "/usr/local/lib64/python3.9/site-packages/sqlalchemy/pool/base.py", line 674, in __init__
    self.__connect()
  File "/usr/local/lib64/python3.9/site-packages/sqlalchemy/pool/base.py", line 901, in __connect
    pool.logger.debug("Error on connect(): %s", e)
  File "/usr/local/lib64/python3.9/site-packages/sqlalchemy/util/langhelpers.py", line 146, in __exit__
    raise exc_value.with_traceback(exc_tb)
  File "/usr/local/lib64/python3.9/site-packages/sqlalchemy/pool/base.py", line 896, in __connect
    self.dbapi_connection = connection = pool._invoke_creator(self)
  File "/usr/local/lib64/python3.9/site-packages/sqlalchemy/engine/create.py", line 643, in connect
    return dialect.connect(*cargs, **cparams)
  File "/usr/local/lib64/python3.9/site-packages/sqlalchemy/engine/default.py", line 616, in connect
    return self.loaded_dbapi.connect(*cargs, **cparams)
  File "/usr/local/lib/python3.9/site-packages/pymysql/connections.py", line 358, in __init__
    self.connect()
  File "/usr/local/lib/python3.9/site-packages/pymysql/connections.py", line 664, in connect
    self._request_authentication()
  File "/usr/local/lib/python3.9/site-packages/pymysql/connections.py", line 954, in _request_authentication
    auth_packet = self._read_packet()
  File "/usr/local/lib/python3.9/site-packages/pymysql/connections.py", line 772, in _read_packet
    packet.raise_for_error()
  File "/usr/local/lib/python3.9/site-packages/pymysql/protocol.py", line 221, in raise_for_error
    err.raise_mysql_exception(self._data)
  File "/usr/local/lib/python3.9/site-packages/pymysql/err.py", line 143, in raise_mysql_exception
    raise errorclass(errno, errval)
sqlalchemy.exc.OperationalError: (pymysql.err.OperationalError) (1049, "Unknown database 'db-final-database'")
(Background on this error at: https://sqlalche.me/e/20/e3q8)

我已经尝试过了，似乎可以连接但不传输数据

$ nc -vz db-final-database.csfitfdo13cc.us-east-1.rds.amazonaws.com 3306
Ncat: Version 7.93 ( https://nmap.org/ncat )
Ncat: Connected to 10.0.0.68:3306.
Ncat: 0 bytes sent, 0 bytes received in 0.04 seconds.
amazon-web-services flask private subnet vpc
1个回答
0
投票

“数据库”一词的不同用法就是这里的问题。他们感到困惑是很常见的。

您创建了一个运行 MySQL 的 RDS 数据库实例。那是 AWS 资源。它不是 MySQL 数据库。

您需要实际创建一个 MySQL 数据库。为此，您将 MySQL 客户端连接到 RDS 数据库实例，然后使用 SQL（或其他）创建一个或多个数据库。

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