带有 docker-compose 和 Django 的 AWS Postgresql RDS 实例“不存在”

Question

我的 RDS 和 web 容器没有连接。

但是我在Django的设置里做了所有数据库相关的设置，AWS RDS也设置好了。

我还应该做些什么？

这是Django的设置文件的DATABASES。

DATABASES = {
    "default": {
        "ENGINE": "django.db.backends.postgresql",
        "NAME": env("SQL_DATABASE"),
        "USER": env("SQL_USER"),
        "PASSWORD": env("SQL_PASSWORD"),
        "HOST": env("SQL_HOST"),
        "PORT": env("SQL_PORT"),
    }
}

我用nginx-proxy 或TLS 跳过了docker-compose.yml。

当我在本地测试时，我在docker-compose 上制作并安装了数据库容器，但在prod 环境中，我没有制作数据库容器，因为我使用了AWS RDS。 这会是个问题吗？

请帮帮我。

（ps.PROJECT_NAME全部替换为实际项目名称。）

这是我的docker-compose.yml

version: '3.8'

services:

  web:
    build:
      context: .
      dockerfile: prod.Dockerfile
    image: project:web
    command: gunicorn PROJECT_NAME.wsgi:application --bind 0.0.0.0:8000
    env_file:
      - envs/.env.prod
    volumes:
      - static_volume:/home/app/web/static
      - media_volume:/home/app/web/media
    expose:
      - 8000
    entrypoint:
      - sh
      - config/docker/entrypoint.prod.sh

volumes:
  static_volume:
  media_volume:

这是我从docker得到的错误

Waiting for postgres...
PostgreSQL started

Traceback (most recent call last):
  File "/usr/local/lib/python3.8/site-packages/django/db/backends/base/base.py", line 219, in ensure_connection
    self.connect()
  File "/usr/local/lib/python3.8/site-packages/django/utils/asyncio.py", line 26, in inner
    return func(*args, **kwargs)
  File "/usr/local/lib/python3.8/site-packages/django/db/backends/base/base.py", line 200, in connect
    self.connection = self.get_new_connection(conn_params)
  File "/usr/local/lib/python3.8/site-packages/django/utils/asyncio.py", line 26, in inner
    return func(*args, **kwargs)
  File "/usr/local/lib/python3.8/site-packages/django/db/backends/postgresql/base.py", line 187, in get_new_connection
    connection = Database.connect(**conn_params)
  File "/usr/local/lib/python3.8/site-packages/psycopg2/__init__.py", line 127, in connect
    conn = _connect(dsn, connection_factory=connection_factory, **kwasync)
psycopg2.OperationalError: FATAL:  database "db-PROJECT_NAME-ec2" does not exist


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

Traceback (most recent call last):
  File "manage.py", line 22, in <module>
    main()
  File "manage.py", line 18, in main
    execute_from_command_line(sys.argv)
  File "/usr/local/lib/python3.8/site-packages/django/core/management/__init__.py", line 401, in execute_from_command_line
    utility.execute()
  File "/usr/local/lib/python3.8/site-packages/django/core/management/__init__.py", line 395, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/usr/local/lib/python3.8/site-packages/django/core/management/base.py", line 330, in run_from_argv
    self.execute(*args, **cmd_options)
  File "/usr/local/lib/python3.8/site-packages/django/core/management/base.py", line 371, in execute
    output = self.handle(*args, **options)
  File "/usr/local/lib/python3.8/site-packages/django/core/management/base.py", line 85, in wrapped
    res = handle_func(*args, **kwargs)
  File "/usr/local/lib/python3.8/site-packages/django/core/management/commands/migrate.py", line 92, in handle
    executor = MigrationExecutor(connection, self.migration_progress_callback)
  File "/usr/local/lib/python3.8/site-packages/django/db/migrations/executor.py", line 18, in __init__
    self.loader = MigrationLoader(self.connection)
  File "/usr/local/lib/python3.8/site-packages/django/db/migrations/loader.py", line 53, in __init__
    self.build_graph()
  File "/usr/local/lib/python3.8/site-packages/django/db/migrations/loader.py", line 216, in build_graph
    self.applied_migrations = recorder.applied_migrations()
  File "/usr/local/lib/python3.8/site-packages/django/db/migrations/recorder.py", line 77, in applied_migrations
    if self.has_table():
  File "/usr/local/lib/python3.8/site-packages/django/db/migrations/recorder.py", line 55, in has_table
    with self.connection.cursor() as cursor:
  File "/usr/local/lib/python3.8/site-packages/django/utils/asyncio.py", line 26, in inner
    return func(*args, **kwargs)
  File "/usr/local/lib/python3.8/site-packages/django/db/backends/base/base.py", line 259, in cursor
    return self._cursor()
  File "/usr/local/lib/python3.8/site-packages/django/db/backends/base/base.py", line 235, in _cursor
    self.ensure_connection()
  File "/usr/local/lib/python3.8/site-packages/django/utils/asyncio.py", line 26, in inner
    return func(*args, **kwargs)
  File "/usr/local/lib/python3.8/site-packages/django/db/backends/base/base.py", line 219, in ensure_connection
    self.connect()
  File "/usr/local/lib/python3.8/site-packages/django/db/utils.py", line 90, in __exit__
    raise dj_exc_value.with_traceback(traceback) from exc_value
  File "/usr/local/lib/python3.8/site-packages/django/db/backends/base/base.py", line 219, in ensure_connection
    self.connect()
  File "/usr/local/lib/python3.8/site-packages/django/utils/asyncio.py", line 26, in inner
    return func(*args, **kwargs)
  File "/usr/local/lib/python3.8/site-packages/django/db/backends/base/base.py", line 200, in connect
    self.connection = self.get_new_connection(conn_params)
  File "/usr/local/lib/python3.8/site-packages/django/utils/asyncio.py", line 26, in inner
    return func(*args, **kwargs)
  File "/usr/local/lib/python3.8/site-packages/django/db/backends/postgresql/base.py", line 187, in get_new_connection
    connection = Database.connect(**conn_params)
  File "/usr/local/lib/python3.8/site-packages/psycopg2/__init__.py", line 127, in connect
    conn = _connect(dsn, connection_factory=connection_factory, **kwasync)
django.db.utils.OperationalError: FATAL:  database "db-PROJECT_NAME-ec2" does not exist

[2021-09-18 15:09:21 +0000] [1] [INFO] Starting gunicorn 20.0.4
[2021-09-18 15:09:21 +0000] [1] [INFO] Listening at: http://0.0.0.0:8000 (1)
[2021-09-18 15:09:21 +0000] [1] [INFO] Using worker: sync
[2021-09-18 15:09:21 +0000] [12] [INFO] Booting worker with pid: 12

Answer 1

最可能的原因是AWS RDS 数据库实例名称与 PostgreSQL 数据库名称不同。

根据AWS RDS manual

对于数据库，选择新数据库实例的名称。

在 RDS 控制台上，将显示新数据库实例的详细信息。数据库实例的状态为正在创建，直到数据库实例被创建并可供使用。当状态变为 available 时，您可以连接到数据库实例。根据分配的数据库实例类和存储，新实例可能需要几分钟才能可用。

根据PostgreSQL: Documentation

dbname

指定要创建的数据库的名称。该名称在此集群中的所有 PostgreSQL 数据库中必须是唯一的。默认是创建一个与当前系统用户同名的数据库。

默认dbname 是postgres

因此，您可能想尝试使用 postgres 而不是 db-PROJECT_NAME-ec2 作为数据库名称。