Question

应用程序

我的应用程序基于带有后端（django），前端和其他相关Pod的kubernetes集群。它还有一些服务，其中之一是postgresql数据库。我有我的应用程序的两个实例（dev和prod-它们存在于不同的名称空间中），下面将讨论的问题都存在。

关于问题

有时，我在执行与访问数据库有关的操作时会遇到麻烦（例如尝试登录）。在kubernetes后端Pod日志中，我看到以下错误消息结尾：

...
django.db.utils.OperationalError: server closed the connection unexpectedly
    This probably means the server terminated abnormally
    before or while processing the request.

通常在10-30分钟内发生，然后自行消失。我不知道如何复制或临时解决此问题，因此我只能注意它，我将尝试在本文中描述一些观察结果。

Django数据库配置

DATABASES = {
    'default': {
        'ENGINE':   'django.db.backends.postgresql',
        'NAME':     os.environ.get('POSTGRES_DBNAME'),
        'USER':     os.environ.get('POSTGRES_NAME'),
        'HOST':     os.environ.get('POSTGRES_HOST'),
        'PASSWORD': os.environ.get('POSTGRES_PASS'),
        'PORT':     os.environ.get('POSTGRES_PORT'),
        'CONN_MAX_AGE': None,
    }

研究问题

存在问题时，我发现了以下内容：

我可以通过ssh访问带有数据库的服务器。我也可以执行-it具有数据库的docker容器，通过psql和sql请求登录数据库。
我无法使用psql（SERVER_PORT = 5432）从本地计算机访问数据库：

psql -d POSTGRES_DBNAME -U POSTGRES_NAME -h SERVER_IP -p SERVER_PORT

在这种情况下，我看到相同的django.db.utils.OperationalError。

在数据库日志中，我提到有时服务器受到蛮力攻击。似乎是间隔数毫秒或更短的一系列请求：

2020-08-09 19:21:48.700 GMT [4847] FATAL:  password authentication failed for user "postgres"
2020-08-09 19:21:48.700 GMT [4847] DETAIL:  Password does not match for user "postgres".
    Connection matched pg_hba.conf line 95: "host all all all md5"
2020-08-09 19:21:48.706 GMT [4848] FATAL:  password authentication failed for user "postgres"
2020-08-09 19:21:48.706 GMT [4848] DETAIL:  Password does not match for user "postgres".
    Connection matched pg_hba.conf line 95: "host all all all md5"
2020-08-09 19:21:48.722 GMT [4849] FATAL:  password authentication failed for user "postgres"
2020-08-09 19:21:48.722 GMT [4849] DETAIL:  Password does not match for user "postgres".
    Connection matched pg_hba.conf line 95: "host all all all md5"
2020-08-09 19:21:49.735 GMT [4850] FATAL:  password authentication failed for user "postgres"
2020-08-09 19:21:49.735 GMT [4850] DETAIL:  Password does not match for user "postgres".
    Connection matched pg_hba.conf line 95: "host all all all md5"
2020-08-09 19:21:49.742 GMT [4851] FATAL:  password authentication failed for user "admin"
2020-08-09 19:21:49.742 GMT [4851] DETAIL:  Role "admin" does not exist.
    Connection matched pg_hba.conf line 95: "host all all all md5"
2020-08-09 19:21:49.757 GMT [4852] FATAL:  password authentication failed for user "admin"
2020-08-09 19:21:49.757 GMT [4852] DETAIL:  Role "admin" does not exist.
    Connection matched pg_hba.conf line 95: "host all all all md5"

在日志中，我也收到很多这样的消息：

2020-08-12 07:15:40.215 GMT [15706] FATAL:  unsupported frontend protocol 0.0: server supports 2.0 to 3.0
2020-08-12 07:15:40.477 GMT [15707] FATAL:  unsupported frontend protocol 255.255: server supports 2.0 to 3.0
2020-08-12 07:15:40.751 GMT [15708] FATAL:  no PostgreSQL user name specified in startup packet
2020-08-12 09:31:41.343 GMT [15957] LOG:  could not receive data from client: Connection reset by peer
2020-08-12 10:09:48.876 GMT [16117] LOG:  could not receive data from client: Connection reset by peer
2020-08-12 10:16:27.459 GMT [16233] LOG:  could not receive data from client: Connection reset by peer
2020-08-12 11:19:02.012 GMT [16325] LOG:  could not receive data from client: Connection reset by peer
2020-08-12 12:40:14.555 GMT [16441] LOG:  could not receive data from client: Connection reset by peer
2020-08-12 13:37:29.711 GMT [16826] LOG:  could not receive data from client: Connection reset by peer
2020-08-12 15:13:01.149 GMT [16856] LOG:  could not receive data from client: Connection reset by peer
2020-08-12 18:00:02.185 GMT [17644] LOG:  invalid length of startup packet

我想找出问题的根源，但没有很多选择可以解决。我很高兴听到任何建议。

Django Web App：“ OperationalError：（psycopg2.OperationalError）服务器意外关闭连接”问题

应用程序

关于问题

Django数据库配置

研究问题

0 个答案: